CN215056204U - Mechanical cipher device - Google Patents

Abstract

The application discloses a mechanical password device, which comprises a lock tongue plate, a first spring and a base, wherein the lock tongue plate is arranged on the base in a sliding mode, two ends of the first spring are respectively abutted against the lock tongue plate and the base, the mechanical password device further comprises at least one group of elastic limiting blocking piece, a locking plate and a turntable, the elastic limiting blocking piece comprises two clamping blocks and a second spring, the two clamping blocks are arranged on the clamping block base in a sliding and elastic mode, the spring is located between the two clamping blocks, one side of each clamping block is provided with the locking plate in a rotating mode, a notch is formed in the locking plate, the turntable is arranged on the base in a rotating mode, and the turntable and the locking plate are matched together; when one end of the clamping block is positioned in the notch, the lock tongue plate can freely slide, and when one end of the clamping block is not positioned in the notch, the clamping block props against the lock tongue plate and prevents the lock tongue plate from sliding. The invention has the following beneficial effects: when in use, the clamping block can not deviate, and the use is more reliable.

Description

Mechanical cipher device

Technical Field

The invention relates to the field of locks, in particular to a mechanical password device.

Background

Now, many door locks are unlocked by mechanical codes, and patent CN207332499U provides a mechanical coded lock, in which two locking bars (reference number 31 in the document) are arranged on two sides of a lock tongue (reference number 20 in the document), two springs are arranged between the two locking bars, the two springs have a tendency to spring open, when the two springs spring the two locking bars, the lock tongue can move freely, and the mechanical coded lock of this structure has a defect that, when the code number on the rotary disc is worn, the maintainer of the lock cannot accurately support the position of the gap in the lock tongue (reference number 33 in the document) to face towards the lock without disassembling the lock.

Disclosure of Invention

The invention provides a mechanical cipher device aiming at the problems.

The technical scheme adopted by the invention is as follows:

a mechanical password device comprises a lock tongue plate, a first spring and a base, wherein the lock tongue plate is installed on the base in a sliding mode, two ends of the first spring respectively abut against the lock tongue plate and the base, the mechanical password device further comprises at least one group of elastic limiting blocking pieces, a locking plate and a rotary table, each elastic limiting blocking piece comprises two clamping blocks and a second spring, the two clamping blocks are installed on the clamping block base in a sliding and elastic mode, the springs are located between the two clamping blocks, one side of each clamping block is provided with the locking plate in a rotating mode, a notch is formed in the locking plate, the rotary table is installed on the base in a rotating mode, and the rotary table and the locking plates are matched together; when one end of the clamping block is positioned in the notch, the lock tongue plate can freely slide, and when one end of the clamping block is not positioned in the notch, the clamping block props against the lock tongue plate and prevents the lock tongue plate from sliding.

In the switch lock body, when the clamping block does not abut against the lock tongue plate, the lock tongue plate can freely slide, and when the clamping block abuts against the lock tongue plate, the lock tongue plate cannot freely slide in the base. In the lock body, the elastic limiting blocking piece is adopted, the group of elastic limiting blocking pieces are provided with the two clamping blocks, the two clamping blocks are symmetrically distributed about the first spring, only one spring is arranged between the pair of clamping blocks, the clamping blocks and the spring support can be assembled more conveniently, and the clamping blocks cannot deviate because of only one spring, so that the assembling structure of the clamping blocks in the structure is more reliable, and meanwhile, the two clamping blocks are symmetrically distributed about the first spring in the structure, so that the lock tongue plate cannot deviate when being propped against the lock tongue plate.

The effect of carousel is that the drive locking plate is rotatory in this lock body, and when the locking plate was rotatory to the breach when aiming at the block position, the block can move one section distance to the locking plate, and the block can break away from the effect of supporting to the locking plate. Specifically, the two clamping blocks and the spring are in the same straight line in the structure.

To sum up, set up the block piece of two symmetries through the both ends at a spring and act as spacing fender spare in this structure, simple structure, the block piece can not take place the skew during the use, uses more reliably.

Optionally, the lock tongue plate is provided with a blocking piece, the blocking block is a cylindrical blocking block, and a side protrusion is arranged on a side wall of the blocking block and used for blocking the blocking piece.

The lock tongue plate is provided with a baffle, the clamping block is provided with a side protrusion, and the baffle is used for blocking the side protrusion to realize that the clamping block blocks the lock tongue plate. Counter bores are formed in the specific clamping blocks, and the two ends of the first spring are located in the counter bores of the two clamping blocks respectively, so that the stability of the clamping blocks in working can be guaranteed. Meanwhile, the base is provided with a slide way, and the upper part of the clamping block is laterally convex and is matched with the slide way in a sliding manner, so that the clamping block can be more stable when sliding in the base.

The lock body adopts three groups of elastic limiting stoppers, each group of elastic limiting stoppers corresponds to 2 Arabic numerals (namely 1-10) or Latin letters (namely a-z), the turnplate is marked with the Arabic numerals or the Latin letters, the numerals or the Latin letters form an unlocking password, the three groups of elastic limiting stoppers are adopted to just form a password with 6 digits, and more elastic limiting assemblies, such as 5 groups, can be added to the lock body with high safety factor, so that the lock body becomes a ten-digit password.

Optionally, the device further comprises a linkage block, and two ends of the linkage block are respectively matched with the rotary disc and the locking plate together.

The linkage block is arranged to facilitate the rotation of the locking plate driven by the turntable.

Optionally, all be provided with the gear face on locking plate and the linkage piece, the locking plate passes through gear face contact with the linkage piece.

Set up the gear face on locking plate and linkage piece, the locking plate passes through the gear face card with the linkage piece and is in the same place, and such design is in order to guarantee that the linkage piece can take the locking plate to rotate smoothly.

Optionally, still include the pressfitting board, the pressfitting board slides and sets up on the base, be provided with the feeler that is used for compressing tightly locking plate and linkage block on the pressfitting board.

The pressing plate has two working states, one working state is that the feeler presses the linkage block to press the linkage block and the locking plate together, and the other working state is that the feeler does not press the linkage block. Set up above-mentioned pressfitting board, when linkage block was pushed down to the pressfitting board, because through the laminating of gear face between linkage block and the locking plate, the pressfitting board pressed linkage block and locking plate into a whole like this, can drive the locking plate rotation when the carousel rotates like this, and this process is equivalent to the process that the rotation password unblanked. When the feeler of the pressing plate does not press the linkage block, the linkage block is driven to rotate by rotation, and the linkage block is in contact with the locking plate through the gear surface, so that the turntable is rotated at the moment, and the phenomenon of slipping can occur between the linkage block and the locking plate (namely, the locking plate does not synchronously rotate along with the linkage block).

If the clamping block is just positioned in the notch of the locking plate (namely in a state of aligning with the password number), the pressing block is moved again, so that the feeler of the pressing block does not press the linkage block, the turntable is rotated again, and finally the pressing block is moved again to press the feeler on the pressing block against the linkage block, which is equivalent to finishing the process of replacing the password once. Therefore, when the password of the lock body is changed in the lock body, the password can be changed only by rotating the turntable to the original password number, then moving the turntable for pressing, then rotating the turntable, and finally moving the pressing block to the original position, so that the password changing process is very convenient. When the password needs to be changed to the scheme in patent CN207332499U, need contact the breach on the metal rod top opening locking plate for locking plate pivot breaks away from the linkage with the locking plate and just can change the password, and is very loaded down with trivial details.

Optionally, a third spring is installed on the base, and two ends of the third spring respectively abut against the base and the pressing plate.

Set up the third spring, and the third spring is in compression state, the both ends of third spring support base and pressfitting board respectively, be in order to guarantee that the pressfitting piece keeps the feeler to push down the state of linkage piece all the time when not receiving external force to stir like this, when needs change the password, external force moves the pressfitting piece, make the feeler of pressfitting piece no longer push down the linkage piece, can rotate the carousel like this and carry out the password change, accomplish the password change back, remove external force, like this under the spring action of third spring, the pressfitting board gets back to original position, the feeler on the pressfitting board continues to push down the linkage piece.

Optionally, the device further comprises a fourth spring, the fourth spring is arranged on the linkage block, and two ends of the fourth spring respectively abut against the linkage block and the turntable.

The counter bore is formed in the specific linkage block, the fourth spring is located in the counter bore, one end of the rotary disc is located in the counter bore of the linkage block, two sections of the fourth spring respectively abut against the linkage block and the rotary disc, the fourth spring is used for firstly enabling the linkage block to downwards face one side of the locking plate, and the other end of the fourth spring is used for playing a buffering role.

Optionally, still include the mounting panel, the mounting panel sets up in the base, the locking plate rotates to set up on the mounting panel, be provided with the step ring on the locking plate, the step ring card is pressed from both sides between mounting panel and base.

The mounting plate is arranged, and the step ring is arranged on the locking plate, so that the locking plate is more stable in rotation.

Optionally, a cover plate is arranged on the base, the rotary table is rotatably installed on the cover plate, a ball is elastically installed on the rotary table, and a pit matched with the ball is formed in the cover plate.

Optionally, the rotary table further comprises a clamp spring, the rotary table is a drawing pin-shaped rotary table, and the clamp spring is installed on the rotary table.

The function of adopting the jump ring is in order to guarantee that the carousel can rotate steadily.

Optionally, a through hole is formed in the base, the locking plate is partially located in the through hole, and the locking plate is provided with an indication mark. The specific indication mark is positioned outside the base.

Set up direction and position of instruction mark's effect on the instruction locking plate breach, can judge indirectly like this whether the block is located the breach of locking plate, the production assembler of being convenient for produces the assembly like this, and convenient to use person observes the orientation of learning breach on the locking plate when password digit wearing and tearing on the carousel.

The invention has the beneficial effects that: the two symmetrical clamping blocks are arranged at the two ends of one spring to serve as the limiting blocking piece, the structure is simple, the clamping blocks cannot deviate during use, the use is more reliable, and the indication marks are arranged on the base to display the orientation of the inner notch of each clamping block.

Description of the drawings:

FIG. 1 is a top view of a mechanical code device;

FIG. 2 is a sectional view taken along line A-A of FIG. 1;

FIG. 3 is a sectional view taken along line B-B of FIG. 1;

FIG. 4 is a schematic diagram of a mechanical combination device;

FIG. 5 is a schematic view showing the installation position of the laminate panel on the base;

FIG. 6 is a schematic view of the mating relationship between the locking plate and the cartridge block;

FIG. 7 is a schematic view of the fitting relationship between the rotary disc, the linkage block and the locking plate;

fig. 8 is a schematic view showing the distribution position of the locking pieces on the mounting plate.

The figures are numbered: 1. a turntable; 2. a cover plate; 3. pressing the plywood; 4. a base; 5. a tongue locking plate; 501. a baffle plate; 6. a slideway; 701. a first spring; 702. a second spring; 703. a third spring; 704. a fourth spring; 705. a fifth spring; 8. a ball; 9. mounting a plate; 10. a locking plate; 1001. a step ring; 1002. a notch; 11. a linkage block; 1110. a gear face; 12. a clamp spring; 13. a clamping block; 1301. a scoliosis; 14. an indicator mark.

The specific implementation mode is as follows:

the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1, fig. 2, fig. 3, and fig. 4, a mechanical cipher device includes a tongue plate 5, a first spring 701, a base 4, a tongue plate 5 slidably mounted on the base 4, two ends of the first spring 701 respectively abut against the tongue plate 5 and the base 4, at least one set of elastic limiting stopper, a locking plate 10, and a rotary disc 1, where the elastic limiting stopper includes two engaging blocks 13 and a second spring 702, the two engaging blocks 13 are slidably and elastically mounted on the base 4 of the engaging block 13, the spring is located between the two engaging blocks 13, one side of each engaging block 13 is rotatably provided with the locking plate 10, the locking plate 10 is provided with a notch 1002, the rotary disc 1 is rotatably mounted on the base 4, and the rotary disc 1 and the locking plate 10 are engaged together; when one end of the engaging block 13 is located in the notch 1002, the tongue plate 5 can slide freely, and when one end of the engaging block 13 is not located in the notch 1002, the engaging block 13 abuts against the tongue plate 5 and prevents the tongue plate 5 from sliding.

In the switch lock body, when the clamping block 13 is not propped against the lock tongue plate 5, the lock tongue plate 5 can freely slide, and when the clamping block 13 is propped against the lock tongue plate 5, the lock tongue plate 5 can not freely slide in the base 4. In the lock body, the elastic limiting stopper is adopted, one group of elastic limiting stoppers are provided with two clamping blocks 13, the two clamping blocks 13 are symmetrically distributed relative to the first spring 701, only one spring is arranged between a pair of clamping blocks 13, the clamping blocks 13 and the spring support can be conveniently assembled, and the clamping blocks 13 cannot deviate due to only one spring, so that the assembling structure of the clamping blocks 13 in the structure is more reliable, meanwhile, the two clamping blocks 13 are symmetrically distributed relative to the first spring 701 in the structure, and the lock tongue plate 5 cannot deviate when abutting against the lock tongue plate 5.

The function of the rotary disc 1 in the lock body is to drive the locking plate 10 to rotate, when the locking plate 10 rotates to the position where the notch 1002 is aligned with the engaging block 13, the engaging block 13 will move a distance towards the locking plate 10, and the engaging block 13 will be separated from the abutting effect on the locking plate 10. Specifically, in the structure, the two clamping blocks 13 and the spring are in the same straight line.

In conclusion, the two symmetrical clamping blocks 13 are arranged at the two ends of one spring to serve as the limiting blocking pieces, so that the structure is simple, the clamping blocks 13 cannot deviate during use, and the use is more reliable.

As shown in fig. 2 and 3, the lock plate 5 is provided with a stopper 501, the engaging block 13 is a cylindrical engaging block 13, and a side wall of the engaging block 13 is provided with a side projection 1301, and the side projection 1301 is used for blocking the stopper 501.

The tongue plate 5 is provided with a stopper piece 501, the engaging piece 13 is provided with a side projection 1301, and the stopper piece 501 blocks the side projection 1301, whereby the engaging piece 13 blocks the tongue plate 5. The specific clamping block 13 is provided with counter bores, and two ends of the first spring 701 are respectively located in the counter bores of the two clamping blocks 13, so that the stability of the clamping blocks 13 during working can be ensured. Meanwhile, the base 4 is provided with the slide 6, and the side projection 1301 on the upper part of the clamping block 13 is matched with the slide 6 in a sliding manner, so that the clamping block 13 is more stable when sliding in the base 4.

The three groups of elastic limiting stoppers of the lock body are characterized in that each group of elastic limiting stoppers correspond to 2 Arabic numerals (namely 1-10) or Latin letters (namely a-z), the turntable 1 is marked with the Arabic numerals or the Latin letters, the numerals or the Latin letters form unlocking passwords, the three groups of elastic limiting stoppers are adopted to just form the passwords with 6 digits, and more elastic limiting assemblies, such as 5 groups, can be added to the lock body with high safety factor, so that the lock body becomes a ten-digit password.

As shown in fig. 2, 3, 6 and 7, the locking device further comprises a linkage block 11, and two ends of the linkage block 11 are respectively matched with the turntable 1 and the locking plate 10.

The linkage block 11 is provided to facilitate the rotation of the locking plate 10 driven by the rotary plate 1.

As shown in fig. 6 and 7, the lock plate 10 and the linkage block 11 are both provided with a gear surface 1110, and the lock plate 10 and the linkage block 11 are in contact through the gear surface 1110.

The gear surface 1110 is arranged on the locking plate 10 and the linkage block 11, the locking plate 10 and the linkage block 11 are clamped together through the gear surface 1110, and the design is to ensure that the linkage block 11 can smoothly bring the locking plate 10 to rotate.

As shown in fig. 2, 3, 4 and 5, the locking device further comprises a pressing plate 3, the pressing plate 3 is slidably disposed on the base 4, and an antenna for pressing the locking plate 10 and the linkage block 11 is disposed on the pressing plate 3.

The pressing plate 3 has two working states, one working state is that the feeler presses the linkage block 11 to press the linkage block 11 and the locking plate 10 together, and the other working state is that the feeler does not press the linkage block 11. Set up above-mentioned pressfitting board 3, when pressfitting board 3 pushed down linkage piece 11, because laminate through gear face 1110 laminating between linkage piece 11 and the locking plate 10, it has pressed linkage piece 11 and locking plate 10 into a whole to be equivalent to pressfitting board 3 like this, can drive locking plate 10 and rotate when carousel 1 rotates like this, and this process is equivalent to the process of rotating the password and unblanking. When the feeler of the pressing plate 3 does not press the linkage block 11, the rotation drives the linkage block 11 to rotate, and the linkage block 11 and the locking plate 10 are in contact with each other through the gear surface 1110, so that the turntable 1 is rotated at the moment, and a slipping phenomenon (namely, the locking plate 10 does not synchronously rotate along with the linkage block 11) can occur between the linkage block 11 and the locking plate 10.

If the clamping block 13 is just positioned in the notch 1002 of the locking plate 10 (i.e. in a state of aligning with the password number), the pressing block is moved again, so that the feeler of the pressing block does not press the linkage block 11, the rotating disc 1 is rotated again, and finally the pressing block is moved again to press the feeler of the pressing block against the linkage block 11, which is equivalent to completing the process of replacing the password once. Therefore, when the password of the lock body is changed in the lock body, the password can be changed only by rotating the turntable 1 to the original password number, then moving the pressing block to the original position after pressing, rotating the turntable 1 and finally moving the pressing block to the original position, so that the password changing process is very convenient. When the password needs to be changed in the scheme in patent CN207332499U, it needs to contact the metal rod to push open the notch 1002 on the locking plate 10, so that the password can be changed only when the rotating shaft of the locking plate 10 is separated from the locking plate 10, which is very tedious.

As shown in fig. 2, 3, 4 and 5, the base 4 is provided with a third spring 703, and two ends of the third spring 703 respectively abut against the base 4 and the pressing plate 3.

Set up third spring 703, and third spring 703 is in compression state, the both ends of third spring 703 support base 4 and pressfitting board 3 respectively, be in order to guarantee that the pressfitting piece keeps the feeler to push down the state of linkage block 11 all the time when not receiving external force to stir like this, when needs change the password, external force moves the pressfitting piece, make the feeler of pressfitting piece no longer push down linkage block 11, can rotate carousel 1 like this and carry out the password change, accomplish the password change back, remove external force, like this under the spring action of third spring 703, pressfitting board 3 gets back to original position, the feeler on the pressfitting board 3 continues to push down linkage block 11.

As shown in fig. 6 and 7, the device further includes a fourth spring 704, the fourth spring 704 is disposed on the linkage block 11, and two ends of the fourth spring 704 respectively abut against the linkage block 11 and the turntable 1.

The counter bore is formed in a specific linkage block 11, a fourth spring 704 is located in the counter bore, one end of a rotary disc 1 is located in the counter bore of the linkage block 11, two sections of the fourth spring 704 respectively abut against the linkage block 11 and the rotary disc 1, the fourth spring 704 has the functions of firstly enabling the linkage block 11 to downwards face to one side of a locking plate 10 and secondly playing a buffering role, an instant impact force can be generated when a clamping block 13 bounces out of a notch 1002 of the locking plate 10, and for an experienced unlocking person, whether the rotary disc 1 slides to a password position or not is judged by means of hand feeling caused by the instant impact, so that the linkage block 11 is arranged to be in contact with the rotary disc 1, and the fourth spring 704 is arranged between the rotary disc 1 and the linkage block 11, so that impact caused by the instant impact can be reduced to the rotary disc 1 to the maximum extent, and the unlocking person is prevented from feeling hand impact.

As shown in fig. 2, 3 and 8, the locking plate further comprises a mounting plate 9, the mounting plate 9 is disposed in the base 4, the locking plate 10 is rotatably disposed on the mounting plate 9, a step ring 1001 is disposed on the locking plate 10, and the step ring 1001 is clamped between the mounting plate 9 and the base 4.

The mounting plate 9 is provided and the step ring 1001 is provided on the locking plate 10, which is designed to ensure that the locking plate 10 is more stable when rotated.

As shown in attached figures 1, 2, 3 and 4, a cover plate 2 is arranged on a base 4, a rotary table 1 is rotatably arranged on the cover plate 2, a ball 8 is elastically arranged on the rotary table 1, and a pit matched with the ball 8 is formed in the cover plate 2.

The concrete turntable 1 is provided with a counter bore, the cylinder is a steel ball, the steel ball is installed in the counter bore of the turntable 1 through a fifth spring 705, the cover plate 2 is a steel plate, and the pit on the cover plate 2 is a semicircular pit.

Meanwhile, the notch 1002 on the locking plate 10 in the lock body is a triangular notch 1002, two symmetrical inclined planes are arranged on the cylindrical clamping block 13, the clamping block 13 is in contact with the triangular notch 1002 through the two symmetrical inclined planes, the elastic coefficient of the fifth spring 705 is greater than that of the first spring 701, the concave pit on the cover plate 2 is rough, the roughness reaches more than Ra100, the roughness of the steel ball is between Ra3.2 and Ra25, and the roughness of the cover plate 2 in contact with the steel ball except the concave pit is between Ra25 and Ra 50.

The design is adopted to increase the difficulty of unlocking by people who do not know the password, because in the lockset, each clamping block 13 is in matched contact with one locking block, when the rotary disc 1 is rotated, the locking plate 10 is about to rotate until the clamping block 13 enters the notch 1002, the clamping block 13 can generate instant impact force to the locking plate 10 and has the phenomenon of noise (the noise is obviously heard by equipment such as a stethoscope), and part of people with rich unlocking experience can rely on the phenomenon to unlock by the unknown password, in order to avoid the phenomenon of unlocking by the unknown password, the scheme adopted by the design is the design idea of making noise and increasing the friction force received during rotation. Therefore, steel balls with the roughness of Ra3.2-Ra 25 are adopted, the roughness of the part, in contact with the steel balls, on the cover plate 2 is between Ra 25-Ra 50, the elastic coefficient of the fifth spring 705 is larger than that of the first spring 701, the friction force between the steel balls and the cover plate 2 is relatively large when the turntable 1 rotates, so that the instant impact force caused by the clamping block 13 and the locking plate 10 is not easy to be detected by an unlocking person (the existence of the fourth spring 704 and the linkage block 11 can also be weakened), the roughness of the pits reaches over Ra100, the roughness of the steel balls is between Ra3.2-Ra 25, the roughness of the cover plate 2, except the pits, in contact with the steel balls is between Ra25 and Ra50, so that in order to produce friction noise, the existence of the friction noise can not be easy for the unlocking person to detect whether the clamping block 13 impacts the locking plate 10, and as the roughness of the pits is highest, a big noise can be generated every time when the steel balls enter the pits, the existence of the loud noise can make it more difficult for an unlocking person to detect the impact noise of the clamping block 13 on the locking plate 10, so that the safety of the whole lock body can be greatly improved.

As shown in the attached fig. 2 and 3, the rotary table further comprises a clamp spring 12, the rotary table 1 is a drawing pin-shaped rotary table 1, and the clamp spring 12 is installed on the rotary table 1.

The function of the circlip 12 is to ensure that the turntable 1 can rotate stably.

As shown in fig. 2 and 8, a through hole is formed on the base 4, the locking plate 10 is partially located in the through hole, and the locking plate 10 is provided with an indication mark 14.

The indication mark 14 is provided to indicate whether the engaging block 13 is located in the notch 1002 of the locking piece 10, which is convenient for a production assembler to perform production assembly. The specific indicators used in this embodiment are arrows, and other indicators may be used in other equivalent embodiments.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, which is defined by the claims and their equivalents, and can be directly or indirectly applied to other related fields of technology.

Claims (10)

1. The mechanical password device is characterized by further comprising a second spring, a clamping block, a locking plate and a rotary plate, wherein the clamping block is installed in the base through the sliding elastic of the second spring, one side of each clamping block is provided with the locking plate in a rotating mode, a notch is formed in the locking plate, the rotary plate is installed on the base in a rotating mode, the rotary plate and the locking plate are matched together, a through hole is formed in the base, the locking plate is partially located in the through hole, and indication marks are arranged on the locking plate and located outside the base.

2. The mechanical code device of claim 1, wherein the tongue plate is provided with a blocking piece, the engaging block is a cylindrical engaging block, and a side wall of the engaging block is provided with a side protrusion for blocking the blocking piece.

3. The mechanical code device of claim 1, further comprising a linkage block, wherein two ends of the linkage block are respectively engaged with the turntable and the locking plate.

4. The mechanical code device of claim 3, wherein the locking plate and the linkage block are provided with gear surfaces, and the locking plate and the linkage block are in contact through the gear surfaces.

5. The mechanical code device of claim 4, further comprising a pressing plate slidably disposed on the base, the pressing plate having an antenna for pressing the locking tab and the linkage tab.

6. The mechanical code device of claim 5, wherein a third spring is mounted on the base, and both ends of the third spring are respectively abutted against the base and the pressing plate.

7. The mechanical code device of claim 3, further comprising a fourth spring disposed on the linkage block, wherein two ends of the fourth spring respectively abut against the linkage block and the turntable.

8. The mechanical code device of claim 1, further comprising a mounting plate disposed within the base, wherein the locking plate is rotatably disposed on the mounting plate, wherein the locking plate has a step ring disposed thereon, and wherein the step ring is clamped between the mounting plate and the base.

9. The mechanical code device as claimed in claim 1, wherein the base is provided with a cover plate, the turntable is rotatably mounted on the cover plate, the turntable is elastically mounted with a ball, and the cover plate is provided with a pit adapted to the ball.

10. The mechanical code device of claim 9, further comprising a snap spring, wherein the dial is a thumbtack-like dial, and wherein the snap spring is mounted to the dial.

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