Inner core of a lock and unlocking tool

Abstract

The present invention discloses an inner core of a lock, which belongs to the field of daily necessities. It solves the problem that the blade can rotate freely, causing the unlocking key to be unable to be smoothly inserted into the lock core, thus affecting the normal unlocking of the user. The technical solution to this problem is mainly that the core body is provided with an eyelet for inserting the unlocking tool and a mounting groove for installing the blade, the mounting groove intersects and communicates with the eyelet, the blade can rotate along the circumference of the core body in the mounting groove, the blade is provided with a plug hole for inserting the unlocking tool, an unlocking protrusion matched with the unlocking tool, and an unlocking groove for accommodating a lock pin, all the plug holes are axially aligned with the eyelet, the unlocking tool is inserted in place to axially align all the unlocking grooves, the lock pin falls into the unlocking groove to unlock the core body, and a limiting surface for limiting the rotation angle α of the blade to not exceed 180° is provided in the mounting groove. The present invention is mainly used to facilitate normal use by users without reducing safety. The present invention also provides an unlocking tool for opening the inner core of the above-mentioned lock.

Description

Technical Field

[0001] The invention relates to daily necessities, in particular to an inner core of a lock and a lock-opening tool. Background Art

[0002] As a prior art, WO 2008 / 034345 A1 discloses an anti-theft lock head and an unlocking key with a blade that can be twisted 360 degrees. The anti-theft lock head includes a housing, a lock core, a spring, a pin, a bushing, a locking key, an unlocking blade and a spacer blade. The unlocking blade is movably arranged in the lock core at a certain interval. Each unlocking blade is provided with an unlocking groove and a key hole, and the inner wall of the key hole is provided with a protrusion that can match the tooth groove on the key. In the unlocking state, the protrusions in the key hole of each unlocking blade are arranged at a certain angle. The key body of the unlocking key is a cylinder with a tooth groove, and the tooth groove is distributed in a curved segmented manner around the circumferential surface of the key body. Among them, the unlocking blade of the anti-theft lock head can be twisted freely. Since the unlocking blade can be twisted freely, all the protrusions can be distributed on the entire circumference. After the lock core has been inserted by other keys or unlocked by technology, the protrusions may rotate to block the insertion path of the unlocking key, resulting in the unlocking key being unable to be smoothly inserted and affecting the user's normal unlocking. Summary of the invention

[0003] The purpose to be achieved by the present invention is to provide an inner core of a lock which is convenient for users to use normally without reducing safety.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an inner core of a lock, comprising a core body and a blade, the core body is provided with an eyelet for inserting a unlocking tool and a mounting groove for installing the blade, the mounting groove intersects and is connected with the eyelet, the blade can rotate circumferentially along the core body in the mounting groove, the blade is provided with an insertion hole for inserting the unlocking tool, an unlocking protrusion cooperating with the unlocking tool and an unlocking groove for accommodating a locking pin, all the insertion holes are axially aligned with the eyelet, the unlocking tool is inserted into place so that all the unlocking grooves are axially aligned, the locking pin falls into the unlocking groove to unlock the core body, and a limiting surface is provided in the mounting groove for limiting the rotation angle α of the blade to not exceed 180°.

[0005] Furthermore, the limiting surface includes two first limiting surfaces that are arranged face to face and in parallel, and the blade is provided with a first matching surface for limiting the position against the first limiting surface.

[0006] Furthermore, the limiting surface includes two second limiting surfaces, and the blade is provided with a second matching surface for counteracting and limiting the second limiting surfaces.

[0007] Furthermore, the installation groove penetrates to the outer peripheral side of the core body, and the blade is inserted into the installation groove from the outer peripheral side of the core body.

[0008] Furthermore, the installation groove is projected into a T-shape on the cross section of the core body.

[0009] Furthermore, the inner wall of the socket is provided with a guide arc surface, and the guide arc surface rotates along the unlocking tool after the unlocking tool is inserted into the socket.

[0010] Furthermore, the hole wall of the eyelet is provided with a guide groove for facilitating the insertion of the unlocking tool, and the rotation range of the unlocking protrusion avoids the guide groove.

[0011] After adopting the above technical scheme, the present invention has the following advantages: first, since the rotation angle α of the blade does not exceed 180°, the unlocking protrusion can only rotate with the blade within a half-circle range at most, and the tooth groove on the unlocking tool is generally set on one side or both sides, so the unlocking protrusions of all blades will only correspond to one tooth groove and rotate on one side of the unlocking tool. After the core body has been inserted by other keys or unlocked by technology, the unlocking protrusions are still distributed on one side of the unlocking tool. After the user inserts the unlocking tool into the inner core, there will be no unlocking protrusion blocking the insertion path of the unlocking tool, which is very convenient to use; secondly, the rotation angle α of the blade does not exceed 180°, and the number of blades is generally set to more than 6 pieces, and the rotation range of the unlocking protrusion becomes smaller. From the axial direction of the core body, the unlocking protrusion far away from the eyelet entrance can be easily blocked by the unlocking protrusion close to the eyelet entrance. When the inner core is unlocked by technology, it is difficult for the unlocker to directly operate the unlocking protrusion far away from the eyelet entrance, which greatly increases the difficulty of the inner core being unlocked by technology, thereby ensuring the safety of the lock.

[0012] The present invention also provides a unlocking tool for opening the inner core of the above-mentioned lock, comprising a rod body, a flared tooth groove being provided on the rod body, and driving surfaces being provided on two opposite side walls of the tooth groove, the driving surfaces being inclined relative to the bottom surface of the groove, and the driving surfaces contacting the unlocking protrusion to rotate the blade.

[0013] Furthermore, the entrance of the tooth socket is trumpet-shaped, and all unlocking protrusions corresponding to the tooth socket and driven are located on the movement trajectory of the tooth socket entrance.

[0014] After adopting the above technical scheme, the present invention has the following advantages: since the unlocking tool is inserted into the eyelet along the axial direction of the core body, and the blade rotates around the unlocking tool, the inclined driving surface can smoothly convert the axial force into a circumferential force, so that the blade rotates smoothly, and the user has a better experience when inserting the unlocking tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below in conjunction with the accompanying drawings:

[0016] Figure 1 This is a schematic diagram of the structure of the inner core of a lock of the present invention (with unlocking tools);

[0017] Figure 2 It is a structural schematic diagram of an inner core of a lock of the present invention;

[0018] Figure 3 for Figure 2 A magnified cross-sectional view along the AA axis;

[0019] Figure 4 is a cross-sectional schematic diagram of the core body of the present invention;

[0020] Figure 5 A cross-sectional view of the lock picking tool of the present invention after it is inserted into the eyelet;

[0021] Figure 6 The present invention is a schematic structural diagram of a lock picking tool. DETAILED DESCRIPTION

[0022] Embodiment 1:

[0023] like Figures 1 to 4 As shown, the present invention provides an inner core of a lock, which can be widely used in various locks, including a core body 1 and a blade 2. The core body 1 is provided with an eyelet 100 for inserting a unlocking tool 9 and a mounting groove 101 for installing the blade 2. The mounting groove 101 intersects and communicates with the eyelet 100. The blade 2 can rotate circumferentially along the core body 1 in the mounting groove 101. The blade 2 is provided with an insertion hole 201 for inserting the unlocking tool 9, an unlocking protrusion 202 matched with the unlocking tool 9, and an unlocking groove 203 for accommodating a lock pin. All the insertion holes 201 are axially aligned with the eyelet 100. The unlocking tool 9 is inserted into place so that all the unlocking grooves 203 are axially aligned. The lock pin 3 falls into the unlocking groove 203 to unlock the core body 1 (refer to Figure 5 As shown), a limiting surface is provided in the mounting groove 101 for limiting the rotation angle α of the blade 2 to not exceed 180°.

[0024] The unlocking tool 9 in the present invention specifically refers to an unlocking key that can unlock the inner core and open the lock, which is different from other keys mentioned in the present invention. First, since the rotation angle α of the blade 2 does not exceed 180°, the unlocking protrusion 202 can only rotate with the blade 2 within a half-circle at most, and the tooth groove 901 on the unlocking tool 9 is generally set on one side or both sides, so the unlocking protrusions 202 of all blades 2 will only correspond to one tooth groove 901 and rotate on one side of the unlocking tool 9. After the core 1 has been inserted by other keys or unlocked by technology, the unlocking protrusions 202 are still distributed on one side of the unlocking tool 9. After the user inserts the unlocking tool 9 into the inner core, there will be no unlocking protrusion 202 blocking the insertion of the unlocking tool 9. Secondly, the rotation angle α of the blade 2 does not exceed 180°, and the number of blades 2 is generally set to more than 6, the rotation range of the unlocking protrusion 202 becomes smaller, and from the axial direction of the core body 1, the unlocking protrusion 202 away from the entrance of the eyelet 100 can be easily blocked by the unlocking protrusion 202 close to the entrance of the eyelet 100. When the inner core is unlocked by technology, it is difficult for the unlocking person to directly operate the unlocking protrusion 202 away from the entrance of the eyelet 100, which greatly increases the difficulty of unlocking the inner core by technology, thereby ensuring the safety of the lock.

[0025] In order to allow the locking pin 3 to fall into the unlocking groove 203, the outer peripheral side wall of the core body 1 is correspondingly provided with a receiving groove 105. All the unlocking grooves 203 are axially aligned and also aligned with the receiving groove 105 so that the locking pin 3 can fall into the unlocking groove 203. These contents are existing technologies and will not be repeated here.

[0026] In this embodiment, the limiting surface includes two first limiting surfaces 102 that are arranged face to face and in parallel, and the blade 2 is provided with a first mating surface 204 for limiting the position against the first limiting surface 102. The two first limiting surfaces 102 are arranged in parallel, which is convenient for one-time processing and molding. At the same time, considering that the blade 2 needs to rotate between the two first limiting surfaces 102, the blade 2 has a sufficiently large contact area with the first limiting surface 102 after rotating to the extreme position. Therefore, it is a better choice to set two first limiting surfaces 102 that are parallel to each other face to face in the limited space inside the core 1 of the cylinder. It can be understood that when the size of the rotation angle of the blade 2 is adjusted as needed, the angle and spacing between the two first limiting surfaces 102 can also be adjusted.

[0027] On this basis, the contact area between the blade 2 and the core 1 can be further increased when the blade 2 is limited. The limiting surface includes two second limiting surfaces 103, and the blade 2 is provided with a second mating surface 205 for limiting the position against the second limiting surface 103. In order to facilitate processing, the two second limiting surfaces 103 can be located on the same plane, and the blade 2 passes through the middle of the two second limiting surfaces 103. It can be understood that the positional relationship between the two second limiting surfaces 103 can also be adjusted according to the change in the rotation angle of the blade 2 as needed. It can be understood that in actual production, the first limiting surface 102 and the second limiting surface 103 can be set as a pair, or they can be set one by one to form a combination, but it will increase the production process and increase the cost.

[0028] Considering the need for low production costs, the present embodiment selects the installation groove 101 to penetrate the outer peripheral side of the core 1, and the blade 2 is inserted into the installation groove 101 from the outer peripheral side of the core 1. When processing the installation groove 101, it is cut directly from the outer peripheral side of the core 1, and the blade 2 can be inserted into the installation groove 101 alone, which is very convenient for processing and assembly, and the production efficiency can be greatly improved. As a more specific structure, the first limiting surface 102 and the second limiting surface 103 intersect vertically, which is easy to form at one time during processing, so the installation groove 101 is projected in a T shape on the cross section of the core 1, and the processing efficiency and success rate can be improved.

[0029] The present invention advocates that the structure of the mounting groove 101 be simplified as much as possible. The blade 2 has no guide when rotating in the mounting groove 101, and the stability of the blade 2 during rotation cannot be improved. Therefore, a guide arc surface 206 can be provided on the inner wall of the socket 201. After the unlocking tool 9 is inserted into the socket 201, the guide arc surface 206 rotates along the unlocking tool 9, that is, the unlocking tool 9 is used to guide the rotational motion of the blade 2, thereby improving the rotation stability of the blade 2. At the same time, the structural requirements in the mounting groove 101 can be reduced, and the structures of the unlocking tool 9 and the blade 2 are relatively easy to process and form.

[0030] In order to make it more convenient for the user to use the unlocking tool 9, a guide groove 104 can be provided on the hole wall of the eyelet 100 to facilitate the insertion of the unlocking tool 9. The rotation range of the unlocking protrusion 202 avoids the guide groove 104 and only moves in the Figure 3 Rotate outside the two dotted lines.

[0031] In order to further improve the safety, a false groove 207 with a depth less than the unlocking groove 203 may be provided on the blade 2 .

[0032] Embodiment 2:

[0033] A lock opening tool 9, used to open the inner core of the lock in the above embodiment, combined with Figure 1 , Figure 5 and Figure 6As shown, it includes a rod body 91, on which a flared tooth groove 901 is provided, and two opposite side walls in the tooth groove 901 are provided with a driving surface 902, and the driving surface 902 is inclined relative to the groove bottom surface of the tooth groove 901, and the driving surface 902 contacts the unlocking protrusion 202 to rotate the blade 2. The flared tooth groove 901 means that the width of the tooth groove 901 from the groove bottom surface to the groove opening becomes larger, and it is a trapezoidal structure in cross section. Since the unlocking tool 9 is inserted into the eyelet 100 along the axial direction of the core body 1, and the blade 2 rotates around the unlocking tool 9, the inclined driving surface 902 can smoothly convert the axial force into the circumferential force, so that the blade 2 rotates smoothly, and the user has a better experience when inserting the unlocking tool 9. In order to facilitate the user to operate the unlocking tool 9, a handle body 92 can be provided on the rod body 91.

[0034] To further facilitate the user to quickly insert the unlocking tool 9 into place, the entrance 903 of the tooth groove 901 is trumpet-shaped, and all the unlocking protrusions 202 driven by the corresponding tooth groove 901 are located on the movement trajectory of the entrance of the tooth groove 901. The trumpet-shaped entrance can guide the unlocking protrusion 202 into the tooth groove 901, and no matter where the unlocking protrusion 202 is located, it will be received by the entrance, so the user will not encounter any obstruction when inserting the unlocking tool 9 to the bottom.

[0035] The tooth groove 901 can be set on one side or on both sides. In this embodiment, the double-sided setting is adopted, and the two sides are symmetrical, and the user does not need to distinguish. For this purpose, the hole wall of the eyelet 100 is provided with two symmetrical guide grooves 104, and the rod body 91 is provided with a positioning rib 904 that cooperates with the guide groove 104. Two unlocking protrusions 202 are symmetrically distributed in each socket 201. Since the driving surfaces 902 of the two tooth grooves 901 generate symmetrical forces on the two unlocking protrusions 202 of a blade 2, the blade 2 can rotate more smoothly, and the user can operate it with a better feel.

[0036] For other contents not described in this embodiment, please refer to Embodiment 1.

[0037] In addition to the above preferred embodiments, the present invention has other implementation modes. Those skilled in the art may make various changes and modifications based on the present invention. As long as they do not depart from the spirit of the present invention, they should all fall within the scope defined by the claims attached to the present invention.

Claims

1. An inner core of a lock, comprising a core body and a blade, wherein the core body is provided with an eyelet for inserting a unlocking tool and a mounting groove for installing the blade, the mounting groove intersects and communicates with the eyelet, the blade can rotate circumferentially in the mounting groove along the core body, the blade is provided with an insertion hole for inserting the unlocking tool, an unlocking protrusion matched with the unlocking tool, and an unlocking groove for accommodating a lock pin, all the insertion holes are axially aligned with the eyelet, the unlocking tool is inserted into place to axially align all the unlocking grooves, the lock pin falls into the unlocking groove to unlock the core body, and the characteristics are as follows: A limiting surface for limiting the rotation angle α of the blade to no more than 180° is provided in the installation groove; the limiting surface includes two first limiting surfaces arranged face to face and in parallel, and the blade is provided with a first matching surface for limiting the position against the first limiting surface; the limiting surface includes two second limiting surfaces, and the blade is provided with a second matching surface for limiting the position against the second limiting surface, the first limiting surface intersects the second limiting surface perpendicularly, and the installation groove is projected into a T shape on the cross section of the core body.

2. The inner core of the lock according to claim 1, characterized in that: The installation groove penetrates to the outer peripheral side of the core body, and the blade is inserted into the installation groove from the outer peripheral side of the core body.

3. The inner core of the lock according to claim 2, characterized in that: The installation groove is projected into a T shape on the cross section of the core body.

4. The inner core of the lock according to claim 1, characterized in that: The inner wall of the insertion hole is provided with a guide arc surface, and the guide arc surface rotates along the unlocking tool after the unlocking tool is inserted into the insertion hole.

5. The inner core of the lock according to claim 1, characterized in that: The hole wall of the eyelet is provided with a guide groove for facilitating the correct insertion of the unlocking tool, and the rotation range of the unlocking protrusion avoids the guide groove.

6. A lock opening tool for opening the inner core of a lock according to any one of claims 1 to 5, comprising a rod body, a flared tooth groove is provided on the rod body, and two opposite side walls of the tooth groove are provided with driving surfaces, characterized in that: The driving surface is inclined relative to the bottom surface of the tooth groove, and the driving surface contacts the unlocking protrusion to rotate the blade.

7. The unlocking tool according to claim 6, characterized in that: The entrance of the tooth socket is trumpet-shaped, and all unlocking protrusions corresponding to the tooth socket and driven are located on the movement track of the entrance of the tooth socket.

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