CN111287584A - A novel double-key linkage safe deposit box lock and design method of lock chip - Google Patents

Abstract

A design method of a double-key linkage safe deposit box lock and a lock chip comprises an upper lock shell, a lower lock shell, a first key and a second key, wherein a lock tongue and a linkage block are installed in the lower lock shell, the rear end of the lock tongue is positioned at the front end of the linkage block, the backward unlocking of the lock tongue is controlled by the linkage block, a first lock cylinder pulling sleeve and a second lock cylinder pulling sleeve are installed in the upper lock shell, the first lock cylinder pulling sleeve is positioned above the lock tongue, an eccentric cylindrical table at the bottom end of the first lock cylinder pulling sleeve is in linkage with the lock tongue in a matching way, the second lock cylinder pulling sleeve is positioned above the linkage block, and an eccentric cylindrical table at the bottom end of the second lock cylinder pulling sleeve; the lock core pulling sleeve I is internally provided with a top spring, a lock core piece small round pad and a plurality of lock core pieces I matched with the key I which are sequentially connected, and the lock core pulling sleeve II is internally provided with a top spring, a lock core piece small round pad and a plurality of lock core pieces II matched with the key II which are sequentially connected. The invention adopts a pure mechanical structure that double keys and double lock cylinders are mutually restricted and linked through the lock tongue and the linkage block, has good reliability, meets the requirement of double insurance of users and improves the anti-theft security performance.

Description

A novel double-key linkage safe deposit box lock and design method of lock chip

Technical field:

The invention relates to a lock, in particular to a novel double-key linkage safe deposit box lock and a design method for a lock chip.

Background technique:

Most of the general-purpose safe deposit box locks are of a single-key single-cylinder structure. For those safe deposit boxes that store important documents or financial items, they not only require good anti-theft performance, but also require two people to be present at the same time to open the lock. Existing safe deposit boxes Due to the complex structure of the lock cylinder, it is necessary to manufacture a variety of iron lock chips with different structures. The parts are large in size and have poor rigidity and strength. However, it is very complicated, resulting in the unsatisfactory firmness, confidentiality and reliability of the existing dual-key interlocking locks for bank safes, and it is difficult for the existing locks to meet the use requirements of high-quality bank safes.

Invention content:

The technical problem to be solved by the present invention is: to solve the problems existing in the above-mentioned prior art, and to provide a design method of a novel double-key linkage safe deposit box lock and a lock chip. The need for insurance further improves the anti-theft and confidentiality performance.

The technical scheme adopted in the present invention is: a double-key linkage safe deposit box lock, comprising an upper lock shell, a lower lock shell, a key 1 and a key 2, a lock tongue and a linkage block are installed in the lower lock shell, and the rear end of the lock tongue is located in the linkage At the front end of the block, the lock tongue is controlled by the linkage block, and the lock cylinder puller sleeve 1 and the lock cylinder puller sleeve 2 are installed in the upper lock shell. It cooperates with the lock tongue, and the second lock cylinder puller is located above the linkage block, and the eccentric cylindrical platform at the bottom end of the lock cylinder puller two cooperates with the linkage block; the first lock cylinder puller is installed with a top spring and a small circle of the lock chip that are connected in sequence. The pad and a number of lock chips 1 matched with the key 1, the top spring, the small round pad of the lock chip and the several lock chips 2 matched with the key 2 are installed in the lock cylinder pull-out sleeve 2 in sequence.

In the above technical solution, an eccentric cylindrical platform is formed at the bottom end of the lock cylinder pulling sleeve, and correspondingly, a waist-shaped hole is opened on the lock tongue, and the eccentric cylindrical platform at the bottom end of the lock core pulling sleeve is sleeved. The waist-shaped hole of the lock tongue is matched and linked.

In the above technical solution, one end of the linkage block is provided with a rotating hole, a shaft column is formed on the lower lock shell, the rotating hole of the linkage block is sleeved on the axis column of the lower lock shell, and one end of the linkage block is connected to the lower lock shell. A linkage block compression spring is installed between the shaft columns, and the linkage block compression spring applies a counterclockwise pressure to the linkage block, and a limit block is formed on the lower lock shell near the other end of the linkage block; There is an eccentric cylindrical platform, and the eccentric cylindrical platform at the bottom end of the lock cylinder pulling sleeve is abutted against the inner side of the linkage block, so that the linkage block cooperates with the eccentric cylindrical platform at the bottom end of the lock cylinder pulling sleeve.

In the above technical solution, the bottom of the first lock cylinder puller and the second lock cylinder puller are disc-shaped bases, and the upper parts are cylinders with gaps on the left and right sides. The snap ring fits within the lock housing.

In the above technical solution, the lock shell is respectively provided with a lock cylinder hole 1 for assembling the lock cylinder pulling sleeve 1 and a lock cylinder hole 2 for assembling the lock cylinder pulling sleeve 2, and the inner wall of the lock cylinder hole 1 is opened with a lock cylinder. There are two left and right grooves corresponding to the gaps on the left and right sides of the pulling sleeve 1, and two left and right grooves corresponding to the left and right gaps on the left and right sides of the lock cylinder pulling sleeve 2 are opened on the inner wall of the second lock cylinder hole.

In the above technical solution, a special-shaped lock hole with a center symmetrical point is opened in the middle of the lock chip 1, the two ends of the lock chip 1 are concentric circular arcs, and the diameter of the concentric arcs is equal to the outer diameter of the upper part of the lock core pulling sleeve 1. One end of the lock chip can move in the gap on the left and right sides of the lock core and the left and right grooves on the inner wall of the lock core hole; the middle part of the second lock chip also has a special-shaped lock hole with a center symmetrical point, The two ends of the lock chip 2 are concentric arcs, and the diameter of the concentric arcs is equal to the outer diameter of the upper part of the second lock cylinder; move within the two grooves.

In the above technical solution, the front end of the lower lock shell is provided with a lock tongue outlet hole, the front end of the lock tongue protrudes or retracts from the lock tongue outlet hole, the linkage block is an arcuate structure, and the lock cylinder pulls out the two bottom ends of the sleeve. The eccentric cylinder is located inside and abuts against the arcuate structure of the linkage block.

In the above technical solution, the first lock chip or the second lock chip is designed as a special-shaped long strip, and the thickness of the middle part is smaller than that of the two ends; There is a parallel side on the left and right sides of the hole. There is an eccentric distance between the center symmetry point of the special-shaped lock hole and the center of the arc at both ends of the lock chip. Different eccentric values correspond to different lock chips.

In the above technical solution, the cross section of the key blank of the first key or the second key is a special-shaped elongated section with flat ends and a convex arc in the middle; the different depth positions of the key one or the second key correspond to different lock chips, and The two sides of the cross section of key 1 or key 2 at different depths are processed into two parallel hypotenuses that are parallel to each other. The distance between the two parallel hypotenuses is L. There is an eccentric distance e between the center line and the rotation center point of the key, and the eccentric distance is different at different depth positions of the key.

In the above technical solution, the design method of the lock chip is:

Each lock chip is provided with a special-shaped keyhole, and the special-shaped keyhole of each lock chip has the same size and shape; the special-shaped keyhole of each lock chip is designed as a symmetrical figure with a central symmetrical point;

The special-shaped lock holes of each lock chip have two parallel hypotenuses with center symmetry, and the distance between the parallel hypotenuses is L; the two parallel sides are inclined at an angle b relative to the vertical center line of the lock chip;

Both ends of each lock chip are arc-shaped, and the two arcs are concentric, and the diameters of the two ends of each lock chip are equal;

There are different offset distances d between the center symmetry points of the two parallel hypotenuses of different lock chips and the concentric circles of the arcs at both ends.

The working principle and advantages of the present invention:

There are two lock cylinder holes on the upper lock shell, wherein the first lock cylinder hole is equipped with the first lock cylinder puller, the second lock cylinder hole is equipped with the second lock cylinder puller, the first lock cylinder puller and the second lock cylinder puller All are equipped with several lock chips, small round pads of lock chips and top springs connected in sequence from top to bottom. The lower part of the lock core pull-out sleeve is assembled in the upper lock shell through a large round pad and a snap ring to prevent it from falling, and is installed in the lower lock shell. There is a lock tongue and a linkage block. The linkage block is located behind the lock tongue. The bottom end of the lock cylinder is integrally formed with an eccentric cylinder with a toggle lock tongue. In the hole; the bottom end of the second locking cylinder and pulling sleeve is also integrally formed with an eccentric cylindrical platform with a toggle linkage block. The hole is sleeved on the shaft column of the lower lock shell, and a linkage block compression spring is added. Under the pressure of the linkage block compression spring, the linkage block rotates counterclockwise to make it close to the limit block. A number of lock chips in the lock cylinder pulling sleeve one are toggled by the key one, and a number of lock chips in the lock cylinder pulling sleeve two are toggled by the key two.

When unlocking, first insert the key 2 into the lock chip 2, the key 2 rotates in the positive direction, and drives the lock cylinder puller sleeve 2 to rotate, the eccentric cylinder at the bottom of the lock cylinder puller sleeve 2 rotates, and the linkage block is moved clockwise to make the linkage block. The front end is away from the position behind the deadbolt, so that the deadbolt can move back unobstructed. Then insert the key into the lock chip 1, the key rotates in the forward direction, and the lock chip drives the lock cylinder to pull out the sleeve and rotate, and the eccentric cylinder at the bottom of the lock cylinder pull-out sleeve is inserted into the waist-shaped hole on the lock tongue, eccentrically. The cylinder table moves the lock tongue back to realize the unlocking.

When locking the door, first use the key to drive the lock chip 1 in the reverse direction, and the lock cylinder to pull out the sleeve to rotate in the reverse direction. The lock chip 2 drives the lock cylinder puller sleeve 2 to rotate, and the eccentric cylindrical platform at the bottom end of the lock cylinder puller sleeve 2 rotates counterclockwise to leave the linkage block. The position block is limited. At this time, the front end of the linkage block reaches the position of the rear end of the lock tongue, and the rear end of the lock tongue is held up, so that the lock tongue cannot be retreated to unlock the door, and the door is completely locked, and then pull out the key one and the second key. That's it.

Transmission principle of key and lock chip:

这样，当开锁时，钥匙正向转动a°-b°后，钥匙利用不同深度位置横截面的不同偏心e就把不同深度位置的锁芯片向左或向右推动了一定距离d，并使在不同位置的钥匙横截面的上下平行的斜边转动a°-b°的角度后与锁芯片异型锁孔左右两平行边重合，与锁芯片合而为一，使之形成一个总体，从而使不同深度位置的锁芯片都保证其两端圆弧的圆心都与锁芯拔套的上部外圆筒的中心重合，此时所有的锁芯片就不会再伸出锁芯拔套的缺口之外了，钥匙就可以带动锁芯拔套继续转动而实现开锁了。Since several lock chips are installed in the first and second lock cylinders, when the key is unlocked, in order to ensure that the key can smoothly enter the special-shaped lock hole of the lock chip, among the several lock chips in the lock cylinder The special-shaped keyholes between the two must be aligned with the keyholes of the upper lock shell, and at this time, the symmetrical center point of the special-shaped keyhole is coincident with the center of the upper outer cylinder of the lock core pulling sleeve. There is an eccentric distance d between the point and the center of the arc at both ends of the lock chip, so that the center of the arc corresponding to the two ends of each lock chip and the center of the outer cylinder of the lock core are not concentric, and the eccentric distance will also be equal to the center of the lock chip. The eccentric distance between the symmetrical center point of the special-shaped lock hole and the centers of the arcs at both ends of the lock chip will also be offset by a distance d. Although the arc diameter of the arcs at both ends of each lock chip is the same as the diameter of the outer cylinder of the lock core pulling sleeve, but due to the non-concentricity, one end of the lock chip will protrude out of the gap of the lock core pulling sleeve and enter the upper The lock casing is in the left or right slot of the lock cylinder hole, and the length is d, and the door is in the locked state at this time, so that the lock cylinder can not be rotated casually in the lock casing. When unlocking, the key is inserted into the lock hole, as shown in Fig. 15 to Fig. 17, at this time, the cross sections of the key at different depth positions correspond to the lock chips at different depth positions. When the key is inserted and turned by a certain angle, more specifically, as shown in Figure 18 to Figure 20, at this time, when the cross section of the key at each different depth position is rotated in the positive direction, the angle is a°-b° Then, the cross section of each key at different depth positions uses its own different eccentricity e of the cross section to drive the lock chip at different depth positions to move to the left or right by different distances d, which can be deduced from the geometry, this distance d and It corresponds to the eccentricity e of the cross-section at different depths of the key, which has a definite relationship, and the relationship is:

In this way, when the lock is unlocked, after the key is rotated a°-b° in the forward direction, the key uses the different eccentricities e of the cross-sections at different depth positions to push the lock chips at different depth positions to the left or right by a certain distance d, and make the The upper and lower parallel hypotenuses of the key cross-sections at different positions are rotated by an angle of a°-b° and coincide with the left and right parallel sides of the special-shaped lock hole of the lock chip, and are combined with the lock chip to form a whole, so that the different The lock chips at the depth position ensure that the centers of the arcs at both ends are coincident with the center of the upper outer cylinder of the lock cylinder puller. At this time, all the lock chips will not protrude out of the gap of the lock cylinder puller. , the key can drive the lock cylinder to pull out the sleeve to continue to rotate to realize the unlocking.

When locking the door, the cross section of the key at different depths rotates in the opposite direction, and the upper and lower parallel oblique sides of the cross section are separated from the left and right parallel sides of the special-shaped lock hole of the lock chip, while the upper and lower parallel oblique sides in the cross section of the key are parallel to each other. The opposite left and right vertical sides drive the lock chip to rotate in the reverse direction, thereby driving the lock cylinder puller sleeve to rotate in the reverse direction to realize the door locking function. When the key is rotated in the reverse direction, it drives the lock cylinder puller sleeve to rotate through a certain angle, so that the lock cylinder can be pulled out. When the left and right gaps of the upper cylinder of the sleeve are aligned with the grooves on both sides of the lock cylinder hole of the upper lock case, the door lock is locked at this time. Continue to turn the lock key a small angle. Eccentricity e, push the lock chips of different depth positions to the left or right into the left and right inner grooves of the lock cylinder hole, at this time, the key and the lock cylinder can no longer be reversed to pull out the sleeve, and at this time the different depths The special-shaped lock holes of the lock chip are all aligned, and the key can be pulled out to complete the door lock.

To sum up, the present invention adopts dual keys, dual lock cylinders and the mutual restriction, mutual linkage and indispensable dual insurance structure of the lock tongue and the linkage block, which greatly improves the anti-theft performance and confidentiality performance of the safe deposit box lock. In particular, it can meet the needs of some users for important documents, precious items, and financial securities that require two people to be present at the same time to unlock, monitor each other, and check and balance each other. Moreover, the present invention is a purely mechanical structure with strong reliability, especially the first and second lock core pullers in the lock have the same structure, and the first lock chip and the second lock chip have ten pieces, but the lock There are only a few three or four types of chip structures, with small size and simple structure. The material is brass or bronze, which is convenient for processing and production and easy to assemble. However, there are many different arrangements and combinations of lock chips with a few simple structures. Improve the non-weight of the lock, safe and reliable.

Description of drawings:

Fig. 1 is the structure sectional view of the present invention;

Fig. 2 is the top view after removing the lock case and the key in Fig. 1;

Fig. 3 is A-A cross-sectional schematic diagram in Fig. 1;

Fig. 4 is the top view after removing the key in Fig. 1;

FIG. 5 is a schematic plan view of Embodiment 1 of the lock chip;

Fig. 6 is the B-B sectional view of Fig. 5;

7 is a schematic plan view of Embodiment 2 of the lock chip;

Fig. 8 is the C-C sectional view of Fig. 7;

9 is a schematic plan view of Embodiment 3 of the lock chip;

Fig. 10 is the D-D sectional view of Fig. 9;

Figure 11 is a schematic cross-sectional view of a key blank of a key;

Figures 12 to 14 are schematic cross-sectional views of three different depth positions of the processed key;

Figures 15 to 17 are schematic diagrams of the lock chip matching at different depths corresponding to the cross-sections of keys with different depths after the key is inserted;

Figures 18 to 20 are schematic diagrams of the fit of the lock chips at different depths corresponding to the cross-sections of the keys at different depths after the key is turned by an angle when unlocking;

Figure 21 is a schematic perspective view of the key.

Description of reference numerals

1—Key 1, 2—Key 2, 3—Lower lock case, 4—Upper lock case, 5—Lock head cover, 6—Lock tongue, 7—Lock cylinder pulling sleeve 1, 8—Link block, 9—Lock chip 1, 10—small round pad for lock chip, 11—large round pad, 12—retaining ring, 13—top spring, 14—linkage block compression spring, 15—lock cylinder pulling sleeve 2, 16—lock chip 2, 17—special-shaped lock Hole, 18—eccentric cylinder, 19—limiting block, 20—waist hole, 21—groove, 22—fastening screws for upper and lower lock shells, 23—shaft column, 24—lock cylinder hole one, 25—lock cylinder Hole 2, 26—the center symmetry point of the special-shaped lock, 27—the arc at both ends of the lock chip, 28—the center of the arc at both ends of the lock chip, 29—the key rotation center, 30—the outer circle of the upper part of the lock cylinder pulling sleeve.

Detailed ways:

Referring to Figures 1 to 21, a double-key interlocking safe deposit box lock of the present invention includes an upper lock shell, a lower lock shell, a key 1 and a key 2, a lock tongue and a linkage block are installed in the lower lock shell, and the rear end of the lock tongue is installed. It is located at the front end of the linkage block, the spacing is matched, and the first lock cylinder puller and the second lock cylinder puller are installed in the upper lock shell. The second core pulling sleeve is located above the linkage block, and the bottom end of the second locking cylinder pulling sleeve cooperates with the linkage block; the first locking cylinder pulling sleeve is installed with a top spring, a small round pad of the lock chip and a number of lock chips matched with the first key. 1. The top spring, the small round pad of the lock chip and several lock chip twos matched with the second key are installed in the second lock cylinder puller sleeve.

An eccentric cylindrical platform is formed at the bottom end of the lock cylinder pulling sleeve, corresponding to it, a waist-shaped hole is opened on the lock tongue, and the eccentric cylindrical platform at the bottom end of the lock cylinder pulling sleeve is sleeved into the lock tongue. The waist-shaped hole cooperates with the linkage.

One end of the linkage block is provided with a rotating hole, a shaft column is formed on the lower lock shell, the rotating hole of the linkage block is sleeved on the axis column of the lower lock shell, and a linkage is installed between one end of the linkage block and the axis column of the lower lock shell The block compression spring, the linkage block compression spring applies a counterclockwise pressure to the linkage block, and a limit block is formed on the lower lock shell near the other end of the linkage block; The eccentric cylindrical platform at the bottom end of the second end of the lock cylinder pulling sleeve is close to the inner side of the linkage block, so that the linkage block and the eccentric cylindrical platform at the second bottom end of the lock cylinder pulling sleeve cooperate and link together.

The bottom of the first lock cylinder puller and the second lock cylinder puller are both disc-shaped bases, and the upper parts are cylinders with notches on the left and right sides. inside the lock case.

The lock case is respectively provided with a lock cylinder hole 1 for setting the lock cylinder pulling sleeve 1 and a lock cylinder hole 2 for setting the lock cylinder pulling sleeve 2, and the inner wall of the lock cylinder hole 1 is opened with the lock cylinder pulling sleeve 1, left and right. There are two left and right grooves corresponding to the side gaps, and two left and right grooves corresponding to the left and right gaps on the left and right sides of the second lock core pulling sleeve are opened on the inner wall of the second lock cylinder hole.

The center of the lock chip 1 is provided with a center-symmetric special-shaped lock hole, the two ends of the lock chip 1 are concentric arcs, and the diameter of the concentric arcs is equal to the outer diameter of the upper part of the lock core pull-out sleeve 1; It moves in the gaps on the left and right sides of the lock cylinder pull-out sleeve and in the left and right grooves on the inner wall of the lock cylinder hole; the middle part of the second lock core also has a center-symmetric special-shaped lock hole, and the two ends of the second lock core are concentric circles Arc-shaped, the diameter of the concentric arc is equal to the outer diameter of the upper part of the second lock cylinder; the two ends of the lock chip can move in the left and right gaps on the left and right sides of the lock cylinder and the second inner wall of the lock core hole.

The front end of the lower lock shell is provided with a lock tongue outlet, the front end of the lock tongue protrudes or retracts from the lock tongue outlet, the linkage block is an arcuate structure, and the eccentric cylinders at the two bottom ends of the lock cylinder pulling sleeve are located and are closely linked. Inside the arcuate structure of the block.

The first lock chip or the second lock chip is designed as a special-shaped long strip, and the thickness of the middle part is smaller than that of the two ends; there is a center-symmetric special-shaped lock hole in the middle of the lock chip, and the left and right sides of the special-shaped lock hole have a section parallel to each other. The distance is L, and there is an eccentric distance d between the center symmetry point of the special-shaped lock hole and the centers of the arcs at both ends of the lock chip.

The cross section of the key blank of the first key or the second key is a special-shaped elongated section with flat ends and a convex arc in the middle; the different depth positions of the key one or the second key correspond to different lock chips, and the key one or the second key is different. The two sides of the cross section at different depths are processed into two parallel hypotenuses that are parallel to each other, the distance between the two parallel hypotenuses is L, the two parallel hypotenuses and the vertical center line of the key form an angle of a°, and the center line of the two parallel sides is the same as the key. There is a certain distance e between the center points.

The tops of the first lock cylinder hole and the second lock cylinder hole of the lock case are also covered with a lock head cover, and a key hole is opened on the lock head cover.

Claims (10)

1. a safe deposit box lock of double key linkage, it is characterized in that: comprise upper lock case, lower lock case, key one and key two, install lock tongue and linkage block in the lower lock case, and the rear end of the lock bolt is located at the front end of the linkage block. , the back and unlocking of the lock tongue is controlled by the linkage block, and the lock cylinder puller sleeve 1 and the lock cylinder puller sleeve 2 are installed in the upper lock shell. The tongue cooperates with the linkage, the second lock cylinder puller is located above the linkage block, and the eccentric cylindrical platform at the bottom end of the lock cylinder puller second cooperates with the linkage block; the first lock cylinder puller is installed with a top spring, a small round pad of the lock chip and A number of lock chips 1 matched with the key 1, and a top spring, a small round pad of the lock chip, and a plurality of lock chip 2 matched with the key 2 are installed in the lock cylinder pull-out sleeve 2 in sequence. 2 . The safe box lock with double key linkage according to claim 1 , wherein an eccentric cylindrical platform is formed at a bottom end of the lock cylinder pulling sleeve, and corresponding to it, a waist-shaped opening is formed on the lock tongue. 3 . The eccentric cylindrical platform at the bottom end of the lock cylinder is sleeved and inserted into the waist-shaped hole of the lock tongue to cooperate with each other. 3. The safe box lock with double key linkage according to claim 1, characterized in that: one end of the linkage block is provided with a rotating hole, a shaft column is formed on the lower lock shell, and the rotating hole of the linkage block is sleeved on the bottom of the lower lock shell. On the shaft column, a link block compression spring is installed between one end of the linkage block and the shaft column of the lower lock shell. The linkage block compression spring applies a counterclockwise pressure to the linkage block, and is formed on the lower lock shell near the other end of the linkage block. Limiting block; an eccentric cylindrical platform is formed at the second bottom end of the lock cylinder pulling sleeve, and the eccentric cylindrical platform at the second bottom end of the lock core pulling sleeve is close to the inner side of the linkage block, so that the linkage block and the eccentric cylinder at the bottom end of the lock cylinder pulling sleeve are formed. The platform cooperates with the linkage. 4. The safe deposit box lock of double key linkage according to claim 1 is characterized in that: the bottoms of the first and second lock cylinder pulling sleeves are both disc-shaped bases, and the upper parts are open on both left and right sides. A notched cylinder, the disc-shaped base is assembled in the lock-up housing through a large circular washer and a snap ring. 5. The safe deposit box lock with double key linkage according to claim 1, characterized in that: the lock casing is respectively provided with a lock cylinder hole 1 for assembling the lock cylinder pulling sleeve 1 and a lock for assembling the lock cylinder pulling sleeve 2 Core hole 2, the inner wall of the lock cylinder hole 1 is provided with two left and right grooves corresponding to the left and right side gaps of the lock cylinder pulling sleeve 1, and the inner wall of the lock cylinder hole 2 has a left and right side gap corresponding to the lock cylinder pulling sleeve 2. The corresponding left and right grooves. 6. The safe-deposit box lock according to claim 1, characterized in that: a special-shaped lock hole with a center symmetrical point is opened in the middle of the lock chip 1, and the two ends of the lock chip 1 are concentric arcs The diameter of the concentric circular arcs is equal to the outer diameter of the upper part of the lock cylinder pulling sleeve; the two ends of the lock chip can move in the left and right side gaps of the lock cylinder pulling sleeve and the left and right grooves of the inner wall of the lock cylinder hole; There is also a special-shaped lock hole with a center symmetrical point in the middle of the second chip. The two ends of the second lock chip are concentric arcs, and the diameter of the concentric arcs is equal to the outer diameter of the upper part of the second lock core. The notch on the left and right sides of the lock cylinder pulling sleeve 2 and the left and right grooves on the inner wall of the lock cylinder hole 2 move in the inner wall. 7. The safe deposit box lock with double key linkage according to claim 1, characterized in that: the front end of the lower lock shell is provided with a lock tongue outlet hole, and the front end of the lock tongue extends or retracts from the lock tongue outlet hole, so that the The linkage block is an arcuate structure, and the eccentric cylinders at the bottom ends of the lock cylinder pulling sleeve are located and abut against the inner side of the arcuate structure of the linkage block. 8. The safe-deposit box lock with double key linkage according to claim 1, characterized in that: said lock chip 1 or lock chip 2 are both designed as a special-shaped long strip, and the thickness of the middle part is smaller than that of the two end parts; There is a special-shaped lock hole with a central symmetrical point in the middle of the chip. There are parallel sides on the left and right sides of the special-shaped lock hole. There is an eccentric distance between the central symmetrical point of the special-shaped lock hole and the center of the arc at both ends of the lock chip. The values correspond to different lock chips. 9. The safe-deposit box lock according to claim 1, characterized in that: the cross section of the key blank of the first key or the second key is a special-shaped elongated section with flattened ends and a convex arc in the middle; Different depth positions of key 1 or key 2 correspond to different lock chips, and the two sides of the cross section of key 1 or key 2 at different depth positions are processed into two parallel hypotenuses that are parallel to each other, the distance between the two parallel hypotenuses is L, and the two parallel The hypotenuse and the vertical center line of the key form an angle of a°, and there is an eccentric distance e between the center lines of the two parallel sides and the rotation center point of the key, and the eccentric distance is different at different depth positions of the key. 10. A method for designing a lock chip of a safe deposit box lock with double key linkage as claimed in claim 1, wherein each lock chip is provided with a special-shaped keyhole, and the special-shaped keyhole of each lock chip has the same size and shape ;The special-shaped keyholes of each lock chip are designed as symmetrical figures with central symmetrical points; The special-shaped lock holes of each lock chip have two parallel hypotenuses with center symmetry, and the distance between the parallel hypotenuses is L; the two parallel sides are inclined at an angle b relative to the vertical center line of the lock chip; Both ends of each lock chip are arc-shaped, and the two arcs are concentric, and the diameters of the two ends of each lock chip are equal; There are different offset distances d between the center symmetry points of the two parallel hypotenuses of different lock chips and the concentric circles of the arcs at both ends.

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