JPH08270277A - Dial lock - Google Patents

Abstract

PURPOSE: To change a password number by simple operation by erasing the display of the password number by closing a door, while locking a lock automatically. CONSTITUTION: A hole for release is formed in a dial core detachable to a dial 9 in which a numeric character is marked on an outer circumferential surface and which has polygonal projecting sections 13 and automatic locking cams in end faces, and a release preventive lever inserted into the hole for release is fitted at an end section in the opposite direction of the energizing of a lock piece energized in the direction that one side face of a latch 15, which can be projected and withdrawn, is pushed. A change plate 38 brought into contact with a slider 35 energized in the direction that another end section of the latch 25 is pushed through a select spring 40 is mounted. Degree holding surfaces 41b press-contacted with the polygonal projecting sections 13 and surfaces 41a for locking return pushing the automatic locking cams are installed to the change plate 38.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dial lock which is used for a mail box or the like and unlocks when the number on the dial is matched with a personal identification number.

[0002]

2. Description of the Related Art As for a dial lock used for a mail box or the like, there is a technique described in Japanese Patent Publication No. 3-17025. In the dial lock disclosed in the publication, a plurality of windows are provided on the surface of a case fixed to a door, and a part of a number ring in which numbers are arranged on the outer peripheral surface of each window is projected. In the locked state, the door cannot be opened because the tip of the latch, which is held upright by the stopper, projects from the end surface of the door and engages with the mail box.

In order to unlock the dial lock, when the number on the number ring is made to coincide with the personal identification number, the release recess of the ring guide which rotates together with the number ring coincides with the abutting rod of the stopper, and the stopper is released. Since it can move in the direction of the ring guide, the latch can be laid down and the door can be opened. Such a dial lock is easy to unlock, there is no trouble of carrying the key, and the secret code cannot be known to a third party if the dial is properly rotated and the number is changed after the door is closed. Therefore, there are advantages such as being safe.

[0004]

However, after the door is closed, it is necessary to perform a locking operation for changing the numbers on the dial. If this locking operation is forgotten, the mailbox will remain unlocked, and the security code will be required. The problem arises that the third party is known to you. In addition, if the same personal identification number is used for a long time, there is a risk that the personal identification number will be known due to malicious mischief. An object of the present invention is to solve such a problem, and to provide a convenient dial lock that can be automatically locked by closing a door, can change a personal identification number, and can change the number of dials to be automatically locked. It is a thing.

[0005]

In order to achieve the above object, a dial lock of the present invention is fixed to a door, and a handle formed at the tip has a plurality of dial openings formed therein. A dial shaft provided in the handle is rotatably fitted, a part of the outer peripheral surface on which the symbols are arranged protrudes from the dial opening, and the same number of engaging portions as the symbols are provided on one side. A plurality of dials provided with cams for automatic locking on the other side, the dial shaft is provided rotatably and axially movable, one unlocking hole is provided on the outer peripheral surface, and it is provided on the side surface. A plurality of dial cores that are urged in a direction in which the engaged portion engages with the engaging portion, and erected in the case so as to rise and fall. Latch protruding from the end,
There is an unlocking prevention rod that is urged in a direction of pressing one side surface of the latch and abuts against the dial core to prevent movement in the opposite direction, and the dial core is provided with the unlocking hole. A lock piece capable of moving in the opposite direction to the bias when the unlocking bar has the same unlocking angle, a slider biased in a direction to press the other side surface of the latch, and the slider. And a change plate that pushes the automatic locking cam to rotate the dial to the locking angle when moving in the opposite direction.

The dial is provided with polygonal protrusions having the same number of planes as the symbols, and the change plate is provided with
It is preferable to provide a moderation holding surface that comes into pressure contact with the polygonal protrusion when the slider moves in the urging direction. Further, the change plate contacts the slider via the select spring, and a select lever capable of entering or retracting can be provided in the case at a position that prevents movement of the change plate in the opposite direction to the bias. .

The case is provided with a rotation preventing portion that engages with the unlocking hole when the dial core moves in a single direction of the urging direction, and a lever insertion hole that reaches the dial shaft from the outside. Each of the dial cores is provided with a small diameter portion that penetrates through the dial and comes into contact with each other, and has a reset lever whose tip pushes the dial core in the opposite direction when inserted through the lever insertion hole. By providing the dial core, when the dial core is pushed by the reset lever, the engagement between the engaging portion and the engaged portion is released, and the unlocking hole serves as the rotation inhibiting portion. It can be configured to move to the engaging position.

The handle has an outer wall surface that is detachably fitted to the tip of the case, and the unlocking holes of the dial cores are located at the central positions of the outer wall surfaces of the handle that face each other. It is preferable that the handle can be fitted to the case in the opposite manner. It is desirable to insert a partition, which is prevented from being rotated by the case, between the small diameter portions of the dial core.

[0009]

[Function] The function of the dial lock configured as described above is
The description will be made in the order of the locked state, the unlocking operation, the automatic locking by closing the door, the operation for changing the personal identification number, and the operation for changing the number of dials to be automatically locked. In the locked state, since the symbol (number) displayed on the dial opening does not match the secret code (number), the unlock hole of the dial core is at a position that does not match the unlock blocking rod of the lock piece. Therefore, the lock piece is prevented from moving in the opposite direction of the bias, the lock piece presses the side surface of the latch, and the latch cannot be laid down in the direction to allow the door to open, so it is held in the upright state and engaged with the strike on the box side. It is impossible to open the door.

In such a locked state, when the unlocking operation is performed so that the dial symbols (numbers) and the secret symbols (numbers) are matched, the dial cores engaging with the respective dials rotate integrally. However, since the partition is inserted between the dial cores, the rotation of one dial does not affect the rotation of the other dials. Since the moderation holding surface of the change plate is pressed against the polygonal protrusion of the dial, when the dial is rotated, the dial is lightly locked at the correct indexing angle (so-called moderation occurs).

When the symbol (number) on the dial coincides with the secret code (number), the unlocking hole of the dial core coincides with the unlocking prevention rod of the lock piece, so that the unlocked state is established. Therefore, when the door is opened, the latch that receives the door opening force falls down and disengages from the strike on the box side, the lock piece pushed by the falling latch moves in the opposite direction of the bias, and the unlocking prevention rod is used for unlocking. Inserted in the hole. When the door is further opened, the fallen latch passes through the strike and returns to the standing state again, and the unlocking prevention rod separates from the unlocking hole.

When the door is closed, the latch hits the strike and falls in the opposite direction, the slider pushed by the falling latch moves in the opposite direction, and the change plate coming into contact with the slider via the select spring becomes the same as the slider. Move in the direction and push the automatic locking cam. The dial that is pressed by the automatic locking cam rotates, and the symbol (number) displayed in the dial opening becomes a symbol (number) different from the secret code (number), and the dial rotates together with the dial. The unlocking hole of the core does not match the unlocking bar of the lock piece. Therefore, the lock piece cannot move in the opposite direction of the bias, and the latch is held in the upright state,
The door cannot be opened. As described above, the door is automatically locked.

To change the personal identification number, the reset lever is inserted into the lever insertion hole of the case, and each dial core is pushed in the opposite direction. At this time, the dial engaged with the dial opening of the handle cannot move in the axial direction, and only the dial core moves. The moved dial core is released from the engagement with the dial, and is engaged with the rotation preventing portion of the case. Therefore, only the dial can be rotated with the dial core stopped, and if the reset lever is taken out after rotating the dial, the dial core separates from the rotation blocking part of the case and engages with the dial, resulting in a new personal identification number. .

When the number of dials is three, the personal identification number becomes a three-digit number, but when the personal identification number is two digits and the number of dials to be automatically locked is two, and one is desired to be used as a general lock. To do this, the select lever may be moved to a position that limits the movement of the change plate. The change plate that has been prevented from moving is maintained in a position where it is pressed against the polygonal protrusion of the dial, so that the dial and dial core are held unrotatable from the unlocking angle, and the remaining two dials prevent Digit PIN is used. The number of general locks can be changed to any number by changing the select lever.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a dial lock, FIG. 2 is a vertical sectional view of the dial lock cut from a dial shaft, and FIG.
2 is an XX sectional view of FIG. 2, FIG. 5 is a ZZ sectional view of FIG. 2, FIG. 6 is a perspective view of a dial and its related parts, and FIG. FIG. 8 is a perspective view of the parts, and FIG. 8 is a perspective view of the dial lock B attached to the door D of the laterally opening type mail receiver A. In the dial lock B, a handle 2 serving as a front case is fitted to the front of a split type case body 1, and a cover case 3 is attached to the outside of the case body 1 and the handle 2 to form an integral case. Then, after inserting the case into the mounting hole of the door D, the door D is sandwiched between the handle 2 and the cover case 3 and fixed by screwing. A finger-hanging projection 2a for facilitating the door opening operation is provided at the tip of the handle 2.

The case body 1 and the cover case 3 are fixed in the door D of the mail receiver A, the handle 2 projects from the surface of the door D (see FIGS. 3 and 8), and a plurality of handles (in this embodiment) are provided on the front face of the handle 2. Then, three dial openings 4 are formed (see FIG. 1). Inside the handle 2, a recess 2 is formed on one inner wall surface (on the left side in FIG. 2) of the handle 2.
The spring guide 5 is inserted in a, the reset piece 6 is inserted in the recess 2b formed on the other inner wall surface, and both ends of the dial shaft 7 are supported in the holes penetrating the spring guide 5 and the reset piece 6. (Fig. 2,
(See FIG. 5).

Three dial cores 8 are rotatably and axially movably mounted on the dial shaft 7, and disengageable dials 9 are rotatably mounted on each dial core 8 (see FIG. 2, see FIG. 7). Numbers 0 to 9 are arranged and displayed on the outer peripheral surface of the dial 9 (see FIG. 6), and a part of the outer peripheral surface projects from the dial opening 4 (see FIG. 3). Therefore, 1 through the dial opening 4
One number can be read, and the dial 9 can be rotated with a fingertip.

One side of dial 9 (left side in FIG. 2)
A circular recess 10 is formed on the bottom surface of the circular recess 10.
An engaging portion 11 having individual projections is provided (see FIG. 12), and a small diameter hole 12 penetrating to the other side of the circular recess 10 is provided (see FIG. 2). On the other side of the dial 9, a polygonal protrusion 13 having a plane of 10 is formed, and on the end face of the polygonal protrusion 13, small automatic locking cams 14 having substantially triangular contours on both sides of the small diameter hole 12 are formed. Is provided (Fig. 6,
(See FIG. 13).

The dial core 8 has one unlocking hole 1 on one side of the large diameter portion 15 which can be inserted into the circular recess 10 of the dial 9.
6 are provided. An unlocking rod 34, which will be described later, can be inserted into the unlocking hole 16, but when the dial core 8 moves in a direction away from the dial 9, the case main body 1
It engages with the rotation preventing portion 42 formed on the (see FIG. 5).
On the other side of the large diameter portion 15, an engaged portion 18 that can be inserted into and removed from the engagement portion 11 of the dial 9 is formed (see FIGS. 12 and 14), and on the other end surface of the large diameter portion 15, A small diameter portion 19 that is inserted into the small diameter hole 12 of the dial 9 is provided (FIGS. 2 and 1).
4).

A partition 20 inserted into the dial shaft 7 is inserted between the tip of the small-diameter portion 19 of the dial core 8 and the end surface of the dial core 8 adjacent thereto. Since the partition 20 is formed with the stopper 20a that engages with the inner wall surface of the handle 2, it cannot rotate and prevents the dial core 8 from rotating together with being influenced by the rotation of the other dial cores 8. (See FIG. 6).

In FIG. 2, a spring 21 and a washer 2 are provided between the dial core 8 and the spring guide 5 on the left side.
2 is inserted, and the engaged portion 18 of the dial core 8 pushed to the right by the spring 21 becomes the engaging portion 11 of the dial 9.
And the small diameter portion 19 of the dial core 8 pushes the central dial core 8 so that the engaged portion 18 of the central dial core 8 engages with the engaging portion 11 of the dial 9.
Since the small diameter portion 19 of the central dial core 8 pushes the right dial core 8, the engaged portion 18 of the right dial core 8 engages with the engaging portion 11 of the dial 9 and the small diameter portion 19 The tip is pressed against the reset piece 6 (Fig. 2
reference). Therefore, each dial core 8 rotates integrally with each dial 9.

Inside the case body 1, a pair of left and right inner cases 23 are mounted, and the inner case 23 is provided with two guide grooves 24, respectively. The latch 25 inserted between the two inner cases 23 is provided with a latch portion 27 whose tip is formed in a chevron shape on both sides of a central sandwiched wall 26, and guides are provided on outer wall surfaces of both latch portions 27. Two pins 28 that engage with the groove 24 are provided (see FIG. 7). Therefore, the latch 25 can be undulated while being guided by the guide groove 24. When the latch 25 is erected, the tip of the latch 25 projects from the opening 29 formed in the cover case 3 (see FIG. 3), and the door D is closed. When it does, it engages in the strike 51 (see FIG. 10) provided in the mailbox A.

The lock piece 30 slidably provided along the inner case 23 is provided with a pushing protrusion 31 at one end and a spring supporting recess 32 opening at the other end. At the other end of the lock piece 30, three unlocking prevention rods 34 that are respectively close to the dial cores 8 are formed.

The slider 35 slidably provided along the inner case 23 is provided with a pushing protrusion 36 at one end and three spring recesses 37 at the other end. Protrusion 1 protruding downward on the lower surface
7 is provided, and the return spring 33 is inserted between the protrusion 17 and the spring supporting recess 32. Therefore,
The lock piece 30 and the slider 35 are pressed against each other, and the pushing protrusion 31 of the lock piece 30 and the pushing protrusion 36 of the slider 35 are urged in a direction of pinching the held wall 26 of the latch 25 (see FIG. 3). ).

The unlocking prevention rod 34 of the lock piece 30 is prevented from moving in the direction opposite to the biasing direction by the outer peripheral surface of the dial core 8, but the dial core 8 rotates to unlock the unlocking hole 16. When it coincides with the lock blocking rod 34, it can be moved in the direction opposite to the biasing force (see FIGS. 7 and 16). The bent piece 39 of the change plate 38 and the select spring 40 are inserted into the spring recess 37 of the slider 35. Select spring 40 is change plate 38
It plays the role of a cushion.

The change plate 38 is provided with a substantially square hole 41 on the opposite side of the bent piece 39, and the tip 38a from the middle portion of the hole 41 is laterally displaced (FIG. 7).
reference). In the rectangular hole 41, the wall surface on the side of the tip portion 38a is a locking return surface 41a that pushes the automatic locking cam 14, and the opposite surface is a moderation holding surface 41b that contacts and separates from the polygonal protrusion 13.

The select lever 43 shown in FIG. 5 is movable in parallel with the dial shaft 7, and two positioning holes 44 are provided along the moving direction. On the other hand, FIG.
As shown in, the spring 46 and the steel ball 47 are inserted into the hole 45 with a bottom provided in the inner case 23, and the steel ball 4
7 is urged in a direction to engage the positioning hole 44.

The case body 1 is provided with an opening 48 for operating the select lever 43 from the outside, and when the select lever 43 is operated to move, the central change plate 38 is prevented from moving in a direction opposite to the biasing direction (see FIG. 5)) and is lightly locked to a position (see FIG. 18) that limits the amount of movement. At the position shown in FIG. 18, there is a slight gap between the select lever 43 and the change plate 38.

This clearance is an amount by which the select lever 43 pushed by the polygonal protrusion 13 can retreat when the dial core 8 rotates, but an amount by which the automatic locking cam 14 cannot be pushed. is there. The case body 1 is provided with a lever insertion hole 49 that reaches the dial shaft 7 from the outside, and the reset lever 5 is inserted into the lever insertion hole 49.
An inclined surface 50a for pushing the reset piece 6 in the opposite direction to the bias is provided at the tip of 0 (see FIG. 19).

In the laterally open type mail receiver A shown in FIG. 8, the end of the door D is on the left side, and the latch 25 protruding and retracting from the end of the door D is also oriented in the same direction. 2a faces to the right. On the other hand, in the downward-opening mail receiver A'as shown in FIG. 9, both the direction of the latch 25 and the finger-hanging protrusion 2a of the handle 2 are attached with the dial lock B'of the opposite hand which faces in the same direction.

However, in the dial lock B of the present invention, the position of the unlocking hole 16 of the dial core 8 is at the center of both outer wall surfaces 2a of the handle 2, and the distance L from both outer wall surfaces 2a is the same ( (Refer to FIG. 10), the handle 2 can be inverted 180 to be attached, and can be used as the door D of both hands.

Next, referring to the drawings, the operation of the dial lock B constructed as described above will be described with reference to the locked state, the unlocking operation, the automatic locking by closing the door, the password changing operation, and the number of dials automatically locked. The change operation will be described in order. In the locked state, all the numbers of the dial 9 displayed in the dial opening 4 are displayed as 0 (or the number 5 on the opposite side of 0) (in FIG. 1, only the central dial opening 4 is displayed,
The display of the dial openings 4 on both sides is omitted).

In such a locked state, the dial core 8
The unlocking hole 16 is located at a position that does not match the unlocking bar 34 of the lock piece 30 (see FIG. 4). Therefore, the lock piece 30 is prevented from moving in the opposite direction to the bias by the outer peripheral surface of the dial core 8, and the lock piece 30 is locked by the latch 25.
By pressing one side surface of the sandwiched wall 26, the standing latch 25 is prevented from falling down in the clockwise direction in FIG.

Therefore, since the latch 25 cannot move rightward (see FIG. 4) over the strike 51 of the mail receiver A, the door D cannot be opened rightward. The pushing projection 36 of the slider 35 pushes the other side surface of the clamped wall 26 of the latch 25, and the moderation holding surface 4 of the change plate 38 is pushed.
1b is in pressure contact with the polygonal protrusion 13 of the dial 9 (see FIG. 3). Each dial core 8 is pushed by the spring 21 and engaged with the dial 9 (see FIG. 2).

In such a locked state, when the unlocking operation is performed so that the numbers on the three dials 9 coincide with the three-digit personal identification number, the respective dials 9 and the dial core 8 rotate integrally. At this time, since the non-rotatable partition 20 is inserted between the dial cores 8, rotation of one dial 9 does not affect the rotation of the other dial 9. Since the moderation holding surface 41b of the change plate 38 biased in the same direction as the slider 35 is in pressure contact with the polygonal protrusion 13 of the dial 9, when the dial 9 is rotated, the dial 9 is set to a correct indexing angle. Lightly lock (so-called moderation occurs).

When the number on the dial 9 coincides with the personal identification number, the unlocking hole 16 in each dial core 8 is inserted into the lock piece 3.
Since it coincides with the unlocking prevention rod 34 of 0 (see FIG. 10), the lock piece 30 is in an unlocked state in which the lock piece 30 can be moved. At this time, the automatic locking cam 14 of each dial 9 is tilted obliquely (see FIG. 15).

Next, when the door is opened (the door is opened to the left in FIG. 16), the latch 25 that hits the strike 51 is opened.
Falls counterclockwise, the lock piece 30 pushed by the fall of the latch 25 moves, and the unlocking prevention rod 34 is inserted into the unlocking hole 16 (see FIG. 16). If you open the door further,
The fallen latch 25 passes the strike 51, returns to the standing state again, and the unlocking prevention rod 34 is separated from the unlocking hole 16.

Next, the automatic locking will be explained. When the door D is closed, the latch 25 hits the strike 51 and falls down in the clockwise direction (see FIG. 17), and the slider 35 pushed by the fallen latch 25 moves to the right side. The change plate 38, which comes into contact with the slider 35 via the select spring 40, moves in the same direction as the slider 35, and the return locking surface 41a pushes the two automatic locking cams 14 (at this time, the select spring 40 receives an impact). The dial 9 rotates so that the angle of the automatic locking cam 14 becomes parallel to the return locking surface 41a, and the number 0 (or the number 5 on the opposite surface) is set in the dial opening 4. Is displayed.

Further, by rotating the dial 9, the dial 9
The unlocking hole 16 of the dial core 8 that rotates together with the dial core 8
Does not match the unlocking prevention rod 34 of the lock piece 30. Therefore, the lock piece 30 cannot move in the opposite direction to the bias, the latch 25 is held in the upright state, and the door cannot be opened. As described above, at the same time as the door is closed, the personal identification number is erased and automatically locked.

To change the personal identification number, insert the reset lever 50 into the lever insertion hole 49 of the case body 1,
The reset piece 6 is pushed (see FIG. 19). When the reset piece 6 is pushed, the dial 9 that engages with the dial opening 4 of the handle 2 cannot move in the axial direction, so that only each dial core 8 is pushed in the opposite direction.
The engagement between the dial core 8 and the dial 9 is released, and the unlocking hole 16 of the dial core 8 is engaged with the rotation blocking portion 42 of the case body 1, so that the dial core 8 is unrotatably restrained. It

Therefore, only the dial 9 can be rotated with the dial core 8 stopped, and when the reset lever 50 is taken out after the dial 9 is rotated so as to obtain a new personal identification number, the dial core 8 is prevented from rotating. Apart from the part 42, it engages the dial 9 and becomes a new personal identification number.

When the number of dials is three, the personal identification number is a three-digit number, but when the number of dials 9 to be automatically locked is two and it is desired to use the personal identification number as two digits,
As shown in FIG. 5, if the select lever 43 located at a position where the movement of the change plate 38 is not blocked is operated from the opening 48 and moved to a position where the movement amount of the change plate 38 is limited as shown in FIG. Good.

Change plate 38 whose movement is restricted
Can be moved by being pushed by the polygonal protrusion 13 of the dial 9, but since the polygonal protrusion 13 cannot be pushed, the dial 9 is not locked automatically. Therefore, the remaining 2
The individual dial 9 is automatically locked, but the central dial 9
The general lock is performed by rotating the dial with the finger to set the dial core 8 at the lock angle.

When the select lever 43 is returned to the position shown in FIG. 5, all the dials 9 are automatically locked again.
In the above embodiments, only the central dial 9 is switched from automatic locking to general locking, but it is possible to switch two dials 9 to general locking and three dials 9 to general locking. is there.

FIG. 20 is a drawing of the select lever 43 which limits the movement of the two change plates 38.
At 0, it can be moved to a position that restricts the movement of the upper and center change plates 38, and can be returned to the original automatic locking if necessary. FIG. 21 shows the select lever 4 that restricts the movement of the three change plates 38.
3 is a drawing of FIG.

In the present embodiment, numbers are attached to the surface of the dial 9, but it is also possible to use a symbol other than numbers such as a hiragana or a symbol including a letter code such as an alphabet, and is composed of a plurality of letters and numbers. A symbol, for example, "32
4 ”,“ C2A ”, or the like.

[0047]

Since the present invention is constructed as described above, it has the following effects. (1) In the dial lock of the present invention, the display of the personal identification code (number) disappears just by closing the door, and it is automatically locked, so there is no need to change the personal identification code (number) after the door is closed. It is extremely convenient to use.
Also, there is no risk of forgetting to lock the device, so there is no risk of theft or the identification of the personal identification code (number). (2) In the conventional dial lock, if the same personal identification code (number) is used for a long period of time, there is a risk that the personal identification code (number) will be known due to malicious mischief, but the dial lock of the present invention is easy. Since the security code (number) can be changed, it is extremely anti-theft. (3) The number of digits of the security code (number) can be changed by a simple operation depending on the application or the convenience of the user, and some of them can be switched to general lock, or the number of digits of the original security code (number) can be changed. There is a degree of freedom that can be returned to and all dials can be automatically locked again.

[Brief description of drawings]

FIG. 1 is a front view of a locked dial lock.

FIG. 2 is a vertical sectional view of a dial lock cut from a dial shaft.

FIG. 3 is a cross-sectional view taken along line XX of FIG. 2 of the locked dial lock.

FIG. 4 is a sectional view taken along line YY of FIG. 2 showing the locked dial lock.

FIG. 5 is a ZZ of FIG. 2 showing a dial lock for explaining automatic locking.
It is sectional drawing.

FIG. 6 is a perspective view of a dial and its related components.

FIG. 7 is a perspective view of a latch and its related components.

FIG. 8 is a perspective view of a dial lock attached to a door of a side-opening type mail receiver.

FIG. 9 is a perspective view of a dial lock attached to a door of a lower opening type mail receiver.

FIG. 10 is a sectional view of an essential part showing the dial core in an unlocked state.

FIG. 11 is a front view of a dial lock showing dial numbers in an unlocked state.

FIG. 12 is a cross-sectional view of essential parts showing an engaged state of a dial and a dial core.

FIG. 13 is a side view of the dial.

FIG. 14 is a front view of a dial core.

FIG. 15 is a cross-sectional view showing the relationship between the dial in the locked state and the change plate.

16 is a cross-sectional view taken along the line XX of FIG. 2 in the state where the door is being opened.

FIG. 17 is a cross-sectional view taken along the line XX in FIG. 2 in the state where the door is being closed.

FIG. 18 is a vertical cross-sectional view illustrating use of a select lever.

FIG. 19 is a vertical cross-sectional view for explaining an operation when switching one dial to general locking by a reset lever.

FIG. 20 is a vertical cross-sectional view for explaining an operation when switching the two dials to the general lock by the reset lever.

FIG. 21 is a vertical cross-sectional view for explaining the operation when switching the three dials to the general lock by the reset lever.

[Explanation of symbols]

 A, A ′ Mailbox D Door B Dial lock 1 Case body 2 Handle 4 Dial opening 6 Reset piece 7 Dial shaft 8 Dial core 9 Dial 11 Engagement portion 13 Polygonal protrusion 14 Automatic locking cam 16 Unlocking hole 18 Covered Engagement part 20 Partition 21 Spring 25 Latch 26 Clamped wall 27 Latch part 30 Lock piece 33 Return spring 34 Unlocking bar 35 Slider 38 Change plate 40 Select spring 41a Locking return surface 41b Moderation holding surface 42 Rotation blocking part 43 Select lever 49 Lever insertion hole 50 Reset lever

Claims (6)

[Claims] 1. A case fixed to a door and having a plurality of dial openings bored in a handle formed at a tip thereof, and a dial shaft provided in the handle, which is rotatably fitted and has a symbol. A part of the arranged outer peripheral surface projects from the dial opening, a plurality of dials provided with the same number of engaging portions as the above symbols on one side, and an automatic locking cam on the other side, and the dial shaft. It is rotatably and axially movable, has one unlocking hole on the outer peripheral surface, and the engaged portion provided on the side surface is urged in a direction to engage with the engaging portion. A plurality of dial cores, a latch provided in the case so as to be capable of being undulated, and a side edge of which is erected when both side surfaces are pressed and a tip of which protrudes from the end of the door, and a direction of pressing one side surface of the latch. Energized, abutting against the dial core above When the dial core has an unlocking angle that allows the unlocking hole and the unlocking blocking rod to coincide with each other, the dial core can be moved in the opposite direction. Lock piece, a slider that is biased in a direction that presses the other side surface of the latch, and the automatic locking cam that is pushed when the slider moves in the direction opposite to the bias to lock the dial. A dial lock characterized by being provided with a change plate that rotates. 2. The dial is provided with a polygonal protrusion having the same number of planes as the symbol, and the change plate holds the moderation in pressure contact with the polygonal protrusion when the slider moves in the urging direction. The dial lock according to claim 1, wherein a surface is provided. 3. The select plate is provided with a select lever that comes into contact with the slider via a select spring, and that can move into or out of the case at a position that prevents the change plate from moving in a direction opposite to the biasing direction. The dial lock according to claim 1, wherein the dial lock is provided. 4. The case includes a rotation blocking portion that engages with the unlocking hole when the dial core moves in a direction opposite to the urging direction, and a lever insertion hole that reaches the dial shaft from the outside. Provided on each of the dial cores is a small-diameter portion which penetrates the dial and comes into contact with each other. When the lever core is inserted through the lever insertion hole, the tip portion urges the dial core in the opposite direction to reset. A lever is provided, and when the dial core is pushed by the reset lever, the engagement between the engaging portion and the engaged portion is released, and the unlocking hole serves as the rotation preventing portion. The dial lock according to claim 1, wherein the dial lock is moved to an engaging position. 5. The handle has an outer wall surface that is detachably fitted to the tip portion of the case, and the unlocking holes of the dial cores are located on opposite outer wall surfaces of the handle. The dial lock according to claim 1, wherein, by being provided at the central position, the handle can be fitted in the case in an opposite direction. 6. Between the small diameter portions of the dial core,
The dial lock according to claim 1 or 4, wherein a partition for preventing rotation by the case is inserted.