A key with multiple tooth grooves and its production method

Abstract

The invention relates to a key with multiple tooth grooves and a production method thereof, comprising a key body, wherein the key body has a hand-holding portion and an insertion portion capable of being inserted into a keyhole of a lock core, the insertion portion being plate-shaped to form two plate surfaces disposed vertically or horizontally, at least one plate surface being provided with two or more winding tooth grooves, the tooth grooves comprising a first tooth groove and a second tooth groove of different depths, the first tooth groove and the second tooth groove partially overlapping and interlaced with each other at least at one place, and a tooth groove with a larger step difference can be provided on the insertion portion with a fixed width, so that the trajectory change of the tooth groove is larger, and a combination of multiple high step differences is formed in cooperation with locks such as pin locks and blade locks, thereby effectively increasing the number of secret keys of the lock, reducing the mutual opening rate, and improving the safety performance of the lock.

Description

[Technical field]

[0001] The invention relates to the technical field of locks, in particular to a key with multiple tooth grooves and a production method thereof. [Background technology]

[0002] The pin locks, blade locks and other locks in the prior art all need to be provided with a tooth groove that cooperates with the lock core on the insertion part of the key body. In order to increase the number of keys of the lock in the prior art, two tooth grooves are provided on the insertion part, and the tooth grooves are distributed along the length direction of the key body, and the tooth grooves do not intersect with each other. Due to the limited width of the key hole and the key body, the number of tooth grooves cannot be increased, resulting in a limited number of secret keys. At the same time, the step difference of the tooth grooves cannot be increased (the step difference is the minimum value of the change in the tooth groove trajectory). The smaller the step difference of the tooth grooves, the greater the mutual opening rate. [Summary of the invention]

[0003] In order to solve the above problems, the present invention provides a key with multiple tooth grooves and a production method thereof, which can increase the number of secret keys of a lock, reduce the mutual opening rate, and improve the safety performance of the lock.

[0004] To achieve the above purpose, the present invention provides the following technical solutions:

[0005] A key with multiple tooth grooves comprises a key body, wherein the key body has a hand-holding portion and an insertion portion that can be inserted into a keyhole of a lock core, the insertion portion is plate-shaped to form two plate surfaces that are arranged vertically or horizontally, at least one of the plate surfaces is provided with more than two winding tooth grooves, the tooth grooves comprise a first tooth groove and a second tooth groove that overlaps and intersects with the first tooth groove, and the bottom surfaces of the first tooth groove and the second tooth groove are not on the same horizontal plane.

[0006] As a preferred embodiment, it is further defined as: N first matching parts are sequentially arranged on the first tooth groove along the length direction of the key body, which are respectively used to match with the first blade of each group of blades in the lock core; N second matching parts are sequentially arranged on the second tooth groove along the length direction of the key body, which are respectively used to match with the second blade of each group of blades in the lock core; the longitudinal spacing between the first matching part and the second matching part matching with the same group of blades is equal to the longitudinal distance between the first blade and the second blade; N≥2, N is a natural number.

[0007] As a preferred embodiment, it is further defined as: the tooth groove also includes a third tooth groove, the first tooth groove and the second tooth groove are located on one side of the plate surface, and the third tooth groove is located on the other side of the plate surface; the third tooth groove is provided with N third matching parts in sequence along the length direction of the key body, which are used to match the third blade of each group of blade groups in the lock core, and the longitudinal spacing between the first matching part and the third matching part matching with the same group of blade groups is equal to the longitudinal distance between the first blade and the third blade, or the longitudinal spacing between the second matching part and the third matching part matching with the same group of blade groups is equal to the longitudinal distance between the second blade and the third blade; N≥2, N is a natural number.

[0008] As a preferred embodiment, it is further defined as: the tooth socket further includes a fourth tooth socket overlapping and interlaced with the third tooth socket, and the bottom surfaces of the third tooth socket and the fourth tooth socket are not on the same horizontal plane.

[0009] As a preferred embodiment, it is further defined as: N fourth matching parts are sequentially arranged on the fourth tooth groove along the length direction of the key body, which are used to match with the fourth blade of each group of blades in the lock core, and the longitudinal spacing between the third matching part and the fourth matching part matching with the same group of blades is equal to the longitudinal distance between the third blade and the fourth blade; N≥2, N is a natural number.

[0010] As a preferred embodiment, it is further defined as: the same tooth grooves are arranged on the two plate surfaces.

[0011] A method for producing a key with multiple tooth grooves, preparing a key body, the key body having a hand-held portion and an insertion portion that can be inserted into a keyhole of a lock core, the insertion portion being plate-shaped to form two plate surfaces that are disposed vertically or horizontally, placing the key body in a CNC milling machine to process the two plate surfaces so that at least two or more winding tooth grooves are formed on one of the plate surfaces and the same tooth grooves are arranged on the other plate surface, the tooth grooves including a first tooth groove and a second tooth groove that overlaps and intersects with the first tooth groove, and the bottom surfaces of the first tooth groove and the second tooth groove are not on the same horizontal plane.

[0012] As a preferred embodiment, it is further defined as: N first matching parts are sequentially arranged on the first tooth groove along the length direction of the key body, which are respectively used to match with the first blade of each group of blade groups in the lock core; N second matching parts are sequentially arranged on the second tooth groove along the length direction of the key body, which are respectively used to match with the second blade of each group of blade groups in the lock core; a plurality of first level difference central axes distributed in an array are arranged on the key body along its width direction; N first matching parts are located on any one of the first level difference central axes; N second matching parts are located on any one of the first level difference central axes; the longitudinal spacing between the first matching parts and the second matching parts matching with the same group of blade groups is equal to the longitudinal distance between the first blade and the second blade; N≥2, N is a natural number.

[0013] As a preferred implementation, it is further defined as: the spacing d1 between adjacent central axes of the first level differences is 0.8±0.2 mm.

[0014] As a preferred embodiment, it is further defined as: the tooth groove also includes a third tooth groove, the first tooth groove and the second tooth groove are located on one side of the plate surface, and the third tooth groove is located on the other side of the plate surface; the third tooth groove is provided with N third matching parts in sequence along the length direction of the key body, which are respectively used to match the third blade of each group of blade groups in the lock core, the first level difference center axis is located on one side of the plate surface, and the other side of the plate surface is provided with a plurality of array-distributed second level difference center axes along its width direction, and the N third matching parts are located on any second level difference center axis; the longitudinal spacing between the first matching part and the third matching part matching with the same group of blade groups is equal to the longitudinal distance between the first blade and the third blade, or the longitudinal spacing between the second matching part and the third matching part matching with the same group of blade groups is equal to the longitudinal distance between the second blade and the third blade; N≥2, N is a natural number.

[0015] As a preferred implementation, it is further defined as: the spacing d2 between adjacent central axes of the second level differences is 0.8±0.2 mm.

[0016] As a preferred embodiment, it is further defined as: 4. The tooth socket further includes a fourth tooth socket overlapping and interlaced with the third tooth socket, and the bottom surfaces of the third tooth socket and the fourth tooth socket are not on the same horizontal plane.

[0017] As a preferred embodiment, it is further defined as: N fourth matching parts are sequentially arranged on the fourth tooth groove along the length direction of the key body, which are used to match with the fourth blade of each blade group of the lock core respectively, and the N fourth matching parts are located on any second level difference center axis, and the longitudinal spacing between the third matching part and the fourth matching part matching with the same blade group is equal to the longitudinal distance between the third blade and the fourth blade; N≥2, N is a natural number.

[0018] The beneficial effect of the invention is as follows: the invention provides more than two winding tooth grooves on the plate surface of the insertion part, the tooth grooves include a first tooth groove and a second tooth groove of different depths, the first tooth groove and the second tooth groove partially overlap and are staggered at least at one place, and a tooth groove with a larger step difference can be provided on the insertion part with a fixed width, so that the trajectory change of the tooth groove is larger, and a combination of multiple high-step differences is formed in cooperation with locks such as pin locks and blade locks, which effectively increases the number of secret keys of the lock, reduces the mutual opening rate, and improves the safety performance of the lock.

Brief Description of the Drawings

[0019] Figure 1 It is a structural schematic diagram of the invention;

[0020] Figure 2 It is the front view of the invention;

[0021] Figure 3 is a schematic diagram of an area where the first tooth groove is used for the first blade to slide and the second tooth groove is used for the second blade to slide;

[0022] Figure 4 is a schematic diagram of the area of ​​the first tooth groove for the first blade to slide;

[0023] Figure 5 is a schematic diagram of the area of ​​the second tooth groove for the second blade to slide;

[0024] Figure 6 is a schematic diagram of the area of ​​the third tooth flower groove for the third blade to slide;

[0025] Figure 7 It is a schematic diagram of the structure of the first blade. [Specific implementation method]

[0026] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0027] As attached Figure 1 To Attachment Figure 6As shown, a key with multiple tooth grooves includes a key body, the key body has a hand-held portion 1 and an insertion portion 2 that can be inserted into the keyhole of the lock core. In this embodiment, the hand-held portion 1 can be coated with a plastic material commonly used in keys in the prior art, and the key body is made of a metal material commonly used in keys in the prior art. The insertion portion 2 is plate-shaped to form two plate surfaces that are divided up and down or left and right. At least one of the plate surfaces is provided with more than two winding tooth grooves. For the convenience of consumers, the two plate surfaces are provided with the same tooth grooves, and the lock can be opened regardless of which side is used. The tooth grooves include a first tooth groove 3 and a second tooth groove 4 that overlaps and intersects with the first tooth groove 3. The bottom surfaces of the first tooth groove 3 and the second tooth groove 4 are not on the same horizontal plane, so that they can be matched with different types of blades.

[0028] In this embodiment, the first tooth groove 3 is provided with N first matching parts 5 along the length direction of the key body, which are respectively used to match with the first blade 11 of each blade group of the lock core. Figure 7 As shown, the first blade 11 has a protrusion 111 extending into the first tooth groove 3. After the key is inserted into the keyhole of the lock core, the protrusion 111 slides in the first tooth groove 3. The position of the protrusion 111 on the first blade 11 will be designed according to the position of the first matching portion 5, so that all blades are in the unlocked state after the correct key is inserted. The depth of the protrusion 111 will be designed according to the depth of the first tooth groove 3, so that the blades of each blade group can correspond to tooth grooves of different depths. The second tooth groove 4 is sequentially provided with N second matching portions 6 for matching with the second blade of each blade group in the lock core along the length direction of the key body, and the structure of the second blade is the same or similar to that of the first blade 11. The longitudinal spacing between the first matching portion 5 and the second matching portion 6 matching with the same blade group is equal to the longitudinal distance between the first blade 11 and the second blade; N≥2, N is a natural number. The first tooth groove 3 and the second tooth groove 4 share the same width range in different depth directions. On the insertion part with a fixed width, not only the number of tooth grooves can be increased, but also the step difference of the tooth grooves can be increased, so that the trajectory change of the tooth grooves is larger, and it cooperates with pin locks, blade locks and other locks to form a combination of multiple high-step differences, which effectively increases the number of secret keys of the lock, reduces the mutual opening rate, and improves the safety performance of the lock.

[0029] In this embodiment, the tooth groove further includes a third tooth groove 8, the first tooth groove 3 and the second tooth groove 4 are located on one side of the board surface, and the third tooth groove 8 is located on the other side of the board surface; the third tooth groove 8 is sequentially provided with N third matching parts 9 for matching with the third blade of each blade group of the lock core along the length direction of the key body, and the structure of the third blade is the same or similar to that of the first blade 11. The longitudinal spacing between the first matching part 5 and the third matching part 9 matching with the same blade group is equal to the longitudinal distance between the first blade 11 and the third blade, or the longitudinal spacing between the second matching part 6 and the third matching part 9 matching with the same blade group is equal to the longitudinal distance between the second blade and the third blade; N≥2, N is a natural number.

[0030] In order to increase the number of secret keys of the lock, a fourth tooth groove that overlaps and intersects with the third tooth groove 8 can be added in different depth directions within the width range of the third tooth groove 8, and the bottom surfaces of the third tooth groove 8 and the fourth tooth groove are not on the same horizontal plane. Furthermore, the fourth tooth groove is sequentially provided with N fourth matching parts for matching with the fourth blade of each blade group of the lock core along the length direction of the key body, and the structure of the fourth blade is the same or similar to the structure of the first blade 11. The longitudinal spacing between the third matching part 9 and the fourth matching part that match the same blade group is equal to the longitudinal distance between the third blade and the fourth blade; N≥2, N is a natural number. The larger N is, the more blade groups of the lock core are set accordingly, but the larger N is, the length of the lock core will also increase accordingly. At the same time, the more tooth grooves there are, that is, the more blades there are in the blade group, the longer the length of the lock core will also increase accordingly. In this embodiment, N is preferably 6, and the tooth grooves are preferably three. The reset structure of the blade is the simplest and can meet the design requirements of the conventional lock core.

[0031] A method for producing a key with multiple tooth grooves, preparing a key body, the key body having a hand-held portion 1 and an insertion portion 2 that can be inserted into a keyhole of a lock core, the insertion portion 2 being plate-shaped so as to form two plate surfaces that are separated up and down or left and right, placing the key body in a numerically controlled milling machine to process the two plate surfaces so that at least two or more meandering tooth grooves are formed on one of the plate surfaces and the same tooth grooves are arranged on the other plate surface, the tooth grooves include a first tooth groove 3 and a second tooth groove 4 that overlaps and intersects with the first tooth groove 3, and the bottom surfaces of the first tooth groove 3 and the second tooth groove 4 are not on the same horizontal plane. The first tooth groove 3 and the second tooth groove 4 may have a partially overlapping area of ​​the first tooth groove 3 and the second tooth groove 4 due to the direction of tool movement, which is larger than the area of ​​the first tooth groove for the first blade 11 to slide and the area of ​​the second tooth groove for the second blade to slide, but since the bottom surfaces of the first tooth groove 3 and the second tooth groove 4 are not on the same horizontal plane, the sliding of the first blade 11 and the second blade will not be affected.

[0032] In this embodiment, the first tooth groove 3 is provided with N first matching parts 5 for matching with the first blade 11 of each blade group of the lock core in sequence along the length direction of the key body, and the second tooth groove 4 is provided with N second matching parts 6 for matching with the second blade of each blade group of the lock core in sequence along the length direction of the key body. The key body is provided with a plurality of first level difference central axes 7 distributed in an array along its width direction, and the N first matching parts 5 are located on any of the first level difference central axes 7, and the N second matching parts 6 are located on any of the first level difference central axes 7. The longitudinal spacing between the first matching parts 5 and the second matching parts 6 matching with the same blade group is equal to the longitudinal distance between the first blade 11 and the second blade; N≥2, N is a natural number. The spacing d1 between adjacent first level difference central axes 7 is 0.8±0.2mm, that is, the level difference between the first tooth groove 3 and the second tooth groove 4 is 0.8±0.2mm. In this embodiment, the level difference between the first tooth groove 3 and the second tooth groove 4 is preferably 0.8mm.

[0033] In this embodiment, the tooth groove further includes a third tooth groove 8, the first tooth groove 3 and the second tooth groove 4 are located on one side of the plate surface, and the third tooth groove 8 is located on the other side of the plate surface; the third tooth groove 8 is sequentially provided with N third matching parts 9 for matching with the third blade of each blade group of the lock core along the length direction of the key body, the first level difference center axis 7 is located on one side of the plate surface, and the other side of the plate surface is provided with a plurality of array-distributed second level difference center axes 10 along its width direction, and N third matching parts 9 are located on any second level difference center axis 10; the longitudinal spacing between the first matching part 5 and the third matching part 9 matching with the same blade group is equal to the longitudinal distance between the first blade 11 and the third blade, or the longitudinal spacing between the second matching part 6 and the third matching part 9 matching with the same blade group is equal to the longitudinal distance between the second blade and the third blade; N≥2, N is a natural number. The spacing d2 between adjacent second level difference center axes 10 is 0.8±0.2mm. That is, the step difference of the third tooth flower groove 8 is 0.8±0.2 mm. In the present embodiment, the step difference of the third tooth flower groove 8 is preferably 0.8 mm.

[0034] In order to increase the number of secret keys of the lock, a fourth tooth groove that overlaps and intersects with the third tooth groove 8 can be added in different depth directions within the width range of the third tooth groove 8, and the bottom surfaces of the third tooth groove 8 and the fourth tooth groove are not on the same horizontal plane. Furthermore, the fourth tooth groove is provided with N fourth matching parts that are used to match the fourth blade of each blade group of the lock core in sequence along the length direction of the key body, and the N fourth matching parts are located on any of the second differential center axes 10, and the longitudinal spacing between the third matching part 9 and the fourth matching part that match the same blade group is equal to the longitudinal distance between the third blade and the fourth blade; N≥2, N is a natural number. The spacing between adjacent second differential center axes 10 is 0.8±0.2mm. That is, the differential of the fourth tooth groove is 0.8±0.2mm. In this embodiment, the differential of the fourth tooth groove is preferably 0.8mm. A tooth groove with a larger step difference is arranged on the insertion part with a fixed width, so that the trajectory change of the tooth groove is larger, and it cooperates with locks such as pin locks and blade locks to form a combination of multiple high-step differences, which effectively increases the number of secret keys of the lock, reduces the mutual opening rate, and improves the safety performance of the lock.

Claims

1. A key with a plurality of tooth grooves, comprising a key body, the key body having a hand-held portion (1) and an insertion portion (2) capable of being inserted into a keyhole of a lock core, the insertion portion (2) being plate-shaped so as to form two plate surfaces disposed vertically or horizontally, characterized in that At least one of the plate surfaces is provided with two or more meandering tooth grooves, the tooth grooves comprising a first tooth groove (3) and a second tooth groove (4) overlapping and interlaced with the first tooth groove (3), the bottom surfaces of the first tooth groove (3) and the second tooth groove (4) are not on the same horizontal plane, and the first tooth groove (3) and the second tooth groove (4) may have a partially overlapping area larger than the area of ​​the first tooth groove for the first blade (11) to slide and the area of ​​the second tooth groove for the second blade to slide due to the movement direction of the tool.

2. The key with multiple tooth grooves according to claim 1, characterized in that The first tooth groove (3) is provided with N first matching parts (5) along the length direction of the key body, respectively used to match with the first blade (11) of each blade group of the lock core; the second tooth groove (4) is provided with N second matching parts (6) along the length direction of the key body, respectively used to match with the second blade of each blade group of the lock core; the longitudinal spacing between the first matching parts (5) and the second matching parts (6) matching with the same blade group is equal to the longitudinal distance between the first blade (11) and the second blade; N≥2, N is a natural number.

3. The key with multiple tooth grooves according to claim 2, characterized in that The tooth groove further comprises a third tooth groove (8), wherein the first tooth groove (3) and the second tooth groove (4) are located on one side of the plate surface, and the third tooth groove (8) is located on the other side of the plate surface; the third tooth groove (8) is provided with N third matching parts (9) respectively used to match with the third blade of each blade group of the lock core in sequence along the length direction of the key body, wherein the longitudinal spacing between the first matching part (5) and the third matching part (9) matching with the same blade group is equal to the longitudinal distance between the first blade (11) and the third blade, or the longitudinal spacing between the second matching part (6) and the third matching part (9) matching with the same blade group is equal to the longitudinal distance between the second blade and the third blade; N≥2, where N is a natural number.

4. The key with multiple tooth grooves according to claim 3, characterized in that The dental flower groove further comprises a fourth dental flower groove which overlaps and interlaces with the third dental flower groove (8), and the bottom surfaces of the third dental flower groove (8) and the fourth dental flower groove are not on the same horizontal plane.

5. The key with multiple tooth grooves according to claim 4, characterized in that The fourth tooth groove is provided with N fourth matching parts respectively used to match with the fourth blade of each blade group of the lock core in sequence along the length direction of the key body, and the longitudinal spacing between the third matching part (9) and the fourth matching part matching with the same blade group is equal to the longitudinal distance between the third blade and the fourth blade; N≥2, N is a natural number.

6. The key with multiple tooth grooves according to any one of claims 1 to 5, characterized in that The two plate surfaces are both provided with the same tooth grooves.

7. A method for producing a key having a plurality of tooth grooves, comprising preparing a key body, wherein the key body comprises a hand-held portion (1) and an insertion portion (2) capable of being inserted into a keyhole of a lock core, wherein the insertion portion (2) is plate-shaped so as to form two plate surfaces disposed vertically or horizontally ... The key body is placed in a numerically controlled milling machine and the two plate surfaces are processed so that at least two or more meandering tooth grooves are formed on one of the plate surfaces and the same tooth grooves are arranged on the other plate surface, wherein the tooth grooves include a first tooth groove (3) and a second tooth groove (4) overlapping and staggered with the first tooth groove (3), the bottom surfaces of the first tooth groove (3) and the second tooth groove (4) are not on the same horizontal plane, and the first tooth groove (3) and the second tooth groove (4) may have a partially overlapping area of ​​the first tooth groove (3) and the second tooth groove (4) due to the movement direction of the tool, which is larger than the area of ​​the first tooth groove for the first blade (11) to slide and the area of ​​the second tooth groove for the second blade to slide.

8. The method for producing a key having a plurality of tooth grooves according to claim 7, characterized in that The first tooth groove (3) is provided with N first matching parts (5) along the length direction of the key body, respectively used to match with the first blade (11) of each blade group of the lock core; the second tooth groove (4) is provided with N second matching parts (6) along the length direction of the key body, respectively used to match with the second blade of each blade group of the lock core; the key body is provided with a plurality of first step difference center axes (7) distributed in an array along its width direction; the N first matching parts (5) are located on any of the first step difference center axes (7); the N second matching parts (6) are located on any of the first step difference center axes (7); the longitudinal spacing between the first matching parts (5) and the second matching parts (6) matching with the same blade group is equal to the longitudinal distance between the first blade (11) and the second blade; N≥2, where N is a natural number.

9. The method for producing a key having a plurality of tooth grooves according to claim 8, characterized in that The spacing d1 between adjacent first step difference central axes (7) is 0.8±0.2 mm.

10. The method for producing a key having a plurality of tooth grooves according to claim 9, characterized in that The tooth groove further comprises a third tooth groove (8), wherein the first tooth groove (3) and the second tooth groove (4) are located on one side of the plate surface, and the third tooth groove (8) is located on the other side of the plate surface; the third tooth groove (8) is provided with N third matching parts (9) in sequence along the length direction of the key body, which are respectively used to match with the third blade of each blade group of the lock core; the first step difference center axis (7) is located on one side of the plate surface, and the other side of the plate surface is provided with a plurality of second step difference center axes (10) distributed in an array along its width direction, and the N third matching parts (9) are located on any of the second step difference center axes (10); the longitudinal spacing between the first matching part (5) and the third matching part (9) matching with the same blade group is equal to the longitudinal distance between the first blade (11) and the third blade, or the longitudinal spacing between the second matching part (6) and the third matching part (9) matching with the same blade group is equal to the longitudinal distance between the second blade and the third blade; N≥2, where N is a natural number.

11. The method for producing a key having a plurality of tooth grooves according to claim 10, characterized in that The spacing d2 between adjacent second level difference central axes (10) is 0.8±0.2 mm.

12. The method of making a key with multiple tooth grooves according to claim 10 or 11, characterized in that The dental flower groove further comprises a fourth dental flower groove which overlaps and interlaces with the third dental flower groove (8), and the bottom surfaces of the third dental flower groove (8) and the fourth dental flower groove are not on the same horizontal plane.

13. The method for producing a key having a plurality of tooth grooves according to claim 12, characterized in that The fourth tooth groove is provided with N fourth matching parts for matching with the fourth blade of each blade group of the lock core in sequence along the length direction of the key body, the N fourth matching parts are located on any of the second level difference center axes (10), and the longitudinal spacing between the third matching part (9) and the fourth matching part matching with the same blade group is equal to the longitudinal distance between the third blade and the fourth blade; N≥2, N is a natural number.

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