A row of plate type lock

Abstract

The present invention discloses a plate-type lock head, comprising an outer sleeve, an intermediate sleeve, an inner sleeve and a movable part. The inner sleeve is provided with a plurality of locking plates and a plurality of elastic elements. The plurality of locking plates and the plurality of elastic elements can rotate synchronously with the inner sleeve. The intermediate sleeve is rotatably arranged in the outer sleeve, and the inner sleeve is rotatably arranged in the intermediate sleeve. The intermediate sleeve is provided with a movable groove, and the movable part can move radially in the movable groove. The outer sleeve is provided with a accommodating portion, and the locking plate or the inner sleeve can push the movable part to radially extend into the accommodating portion. The movable part is provided with a plurality of avoiding portions, and the plurality of avoiding portions cooperate with the corresponding locking plates to make the movable part disengage from the accommodating portion and enable the locking plate, the inner sleeve, the movable part and the intermediate sleeve to rotate synchronously. In the locked state of the present invention, the locking plate and the inner sleeve can rotate freely. In the unlocked state, the locking plate, the inner sleeve movable part and the intermediate sleeve can rotate synchronously, thereby enhancing the anti-theft performance.

Description

Technical Field

[0001] The present invention relates to the technical field of locks, and in particular to a sheet-type lock. Background Art

[0002] A plate-type lock is a type of lock, which mainly includes an outer sleeve, an inner sleeve, multiple locking plates and multiple elastic elements. The multiple locking plates and multiple elastic elements are arranged in the inner sleeve. The inner sleeve is rotatably arranged in the outer sleeve. The outer sleeve is provided with multiple grooves corresponding to the locking plates. When in use, the key is inserted into the inner sleeve and the locking plates are pushed to the corresponding grooves. The key is turned so that the locking plates can pass through the grooves smoothly, thereby driving the inner sleeve to rotate relative to the outer sleeve to realize the unlocking function.

[0003] Because the lock plate and inner sleeve of the traditional plate-type lock cannot rotate freely when locked, the lock plate will break under violent twisting, allowing the inner sleeve to rotate freely and unlock, resulting in poor anti-theft performance; in addition, the traditional plate-type lock has a small number of matching numbers with keys, which is difficult to meet the needs. Summary of the Invention

[0004] The present invention addresses the deficiencies in the prior art and provides a disc-type lock head, which can achieve free rotation of the lock disc and the inner sleeve in the locked state, thereby enhancing the anti-theft performance.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A plate-type lock head comprises an outer sleeve and an inner sleeve, wherein the inner sleeve is provided with a plurality of locking plates and a plurality of elastic elements, and the plurality of locking plates and the plurality of elastic elements can rotate synchronously with the inner sleeve;

[0007] The cam is fixed to the outer sleeve and the inner sleeve is fixed to the middle sleeve, and the movable part can be radially moved in the movable groove. The outer sleeve is provided with a receiving portion, and the locking piece or the inner sleeve can push the movable part to extend radially outward into the receiving portion. The movable part is provided with a plurality of avoiding portions, and the plurality of avoiding portions cooperate with the corresponding locking pieces at the same time to enable the movable part to be separated from the receiving portion and enable the locking piece, the inner sleeve, the movable part and the middle sleeve to rotate synchronously. By arranging the middle sleeve and the movable part, the middle sleeve is rotatably arranged in the outer sleeve, and the inner sleeve is provided with a movable groove. The sleeve is rotatably arranged in the middle sleeve, and the movable part can move radially in the movable groove on the middle sleeve. An accommodating part is provided in the outer sleeve, and a plurality of avoiding parts are provided on the movable part. In the locked state, since the movable part can move radially, when the locking plate and the inner sleeve are rotated, the movable part is pushed by the locking plate and the inner sleeve and extends radially outward into the accommodating part, so that the locking plate and the inner sleeve can rotate freely, thereby enhancing the anti-theft performance; in the unlocked state, the lock plate is pushed and rotated by the key. When the plurality of avoiding parts cooperate with the corresponding lock plates at the same time, the movable part can be separated from the accommodating part, and the lock plate, the inner sleeve, the movable part and the middle sleeve can rotate synchronously, thereby realizing unlocking.

[0008] As a preferred solution, the avoidance portion is a avoidance groove provided on the inner side wall of the movable part. In the unlocked state, the locking plate is embedded in the avoidance groove to enable the movable part to move radially inward and out of the accommodating portion.

[0009] As a preferred solution, a first protrusion and a second protrusion are respectively provided on both sides of the avoidance groove, a slot is formed between the first protrusion and the second protrusion, and a block is provided on the outer wall of the locking plate. In the unlocked state, the block extends into the slot so that the locking plate drives the movable part and the intermediate sleeve to rotate.

[0010] As a preferred solution, the locking plate is located on both sides of the locking block and is respectively formed with a first shoulder and a second shoulder. The outer side walls of the first shoulder and the second shoulder are both arc-shaped and protrude outward. In the unlocked state, the first protrusion is in contact with the first shoulder, and the second protrusion is in contact with the second shoulder.

[0011] As a preferred solution, the accommodating portion is an accommodating groove, and in the locked state, the outer side of the movable part extends into the accommodating groove.

[0012] As a preferred solution, an elastic push piece is provided in the accommodating groove, one end of the elastic push piece abuts against the inner wall of the accommodating groove, and the other end of the elastic push piece abuts against the movable part, so that the movable part has a tendency to leave the accommodating groove.

[0013] As a preferred solution, the radial height h1 of the movable member is greater than the vertical distance h2 between the inner sleeve and the outer sleeve.

[0014] As a preferred solution, a fixing block is provided on the front outer side wall of the intermediate sleeve, and an arc-shaped groove is provided on the front inner side wall of the outer sleeve. The fixing block extends into the arc-shaped groove, and the fixing block cooperates with the arc-shaped groove to limit the maximum rotation angle of the intermediate sleeve.

[0015] As a preferred solution, the rear end of the inner sleeve is provided with a first socket for inserting the key, and the rear end of the outer sleeve is provided with a second socket for exposing the first socket, and at least one side of the first socket is provided with an anti-foolproof part corresponding to the anti-foolproof groove on the key.

[0016] As a preferred solution, the anti-idiot part is linearly slidably connected to the inner sleeve, and the anti-idiot groove is a non-linear anti-idiot groove.

[0017] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, by providing an intermediate sleeve and a movable part, the intermediate sleeve is rotatably arranged in the outer sleeve, and the inner sleeve is rotatably arranged in the intermediate sleeve. The movable part can radially move in a movable groove on the intermediate sleeve. A accommodating part is provided in the outer sleeve, and a plurality of avoidance parts are provided on the movable part. In the locked state, since the movable part can move radially, when the locking plate and the inner sleeve are rotated, the movable part will be pushed radially outward into the accommodating part by the locking plate and the inner sleeve, so that the locking plate and the inner sleeve can rotate freely, thereby enhancing the anti-theft performance; in the unlocked state, the lock plate is pushed and rotated by the key. When the plurality of avoidance parts cooperate with the corresponding lock plates at the same time, the movable part can be separated from the accommodating part, and the lock plate, the inner sleeve, the movable part and the intermediate sleeve can rotate synchronously, thereby realizing unlocking.

[0018] In order to more clearly illustrate the structural features, technical means and specific objectives and functions achieved by the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments: BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the assembly structure of the first embodiment of the present invention;

[0020] Figure 2 is an exploded schematic diagram of the first embodiment of the present invention;

[0021] Figure 3 is a cross-sectional schematic diagram of the locked state of the first embodiment of the present invention;

[0022] Figure 4 yes Figure 3 A partial enlarged schematic diagram of part A;

[0023] Figure 5 is a cross-sectional schematic diagram of a first unlocked state of the first embodiment of the present invention;

[0024] Figure 6 is a cross-sectional schematic diagram of a second unlocked state of the first embodiment of the present invention;

[0025] Figure 7 is a cross-sectional schematic diagram of a third unlocked state of the first embodiment of the present invention;

[0026] Figure 8 1 is a schematic structural diagram of a movable part according to a first embodiment of the present invention;

[0027] Figure 9 is a schematic cross-sectional view of a movable member according to a first embodiment of the present invention;

[0028] Figure 10 This is a reference diagram of the first embodiment of the present invention in use;

[0029] Figure 11 is an exploded schematic diagram from another perspective of the first embodiment of the present invention;

[0030] Figure 12 is a cross-sectional schematic diagram of the foolproof member and the inner sleeve according to the first embodiment of the present invention;

[0031] Figure 13 Schematic diagram of the fixed connection between the foolproof member and the inner sleeve according to the first embodiment of the present invention;

[0032] Figure 14 is an exploded schematic diagram of a second embodiment of the present invention;

[0033] Figure 15 2 is a schematic diagram of the unlocking state of the second embodiment of the present invention.

[0034] Description of the accompanying drawings:

[0035] 100-row lock 10-outer sleeve 11-accommodation part

[0036] 12- elastic push piece 13- installation opening 14- installation block

[0037] 15- snap ring 16- arc groove 17- second socket

[0038] 18-pressure piece 19-mounting plate 20-middle sleeve

[0039] 21-unlocking block 22-movable slot 23-fixed block

[0040] 30-inner sleeve 301-installation slot 302-first socket

[0041] 303-slot 304-long hole 31-locking piece

[0042] 311-key hole 312-block 313-first shoulder

[0043] 314-second shoulder 32-elastic element 321-large spring

[0044] 322- small spring 33- foolproof part 331- slide rod

[0045] 332-anti-foolproof block 333-extension arm 34-reset mechanism

[0046] 40-movable member 41-avoidance portion 42-first protrusion

[0047] 43-second protrusion 44-slot 45-rod

[0048] 451-outer arc surface 46-guide portion 461-first guide slope

[0049] 462-second guide slope 463-inner curved surface 50-key

[0050] 51-Step 52-Anti-mistake groove DETAILED DESCRIPTION

[0051] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the position or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0052] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0053] like Figure 2 For the convenience of description and understanding, Figure 2 F in the middle indicates forward direction, and H indicates backward direction.

[0054] like Figure 1-12As shown, the present invention discloses a row of plate type lock 100. In a first embodiment, the row of plate type lock 100 includes an outer sleeve 10, an intermediate sleeve 20, an inner sleeve 30 and a movable part 40. The inner sleeve 30 is provided with a plurality of locking plates 31 and a plurality of elastic elements 32. The plurality of locking plates 31 and the plurality of elastic elements 32 can rotate synchronously with the inner sleeve 30. The plurality of locking plates 31 can move along the axial direction of the inner sleeve 30. The plurality of elastic elements 32 make the locking plates 31 have a tendency to move backward. The inner sleeve 30 is provided with a mounting groove 301. The mounting groove 30 1 extends along the axial direction of the inner sleeve 30, and the multiple locking pieces 31 are movably arranged in the installation groove 301. The multiple elastic elements 32 include a large spring 321 and four small springs 322. There are three locking pieces 31, and the three locking pieces 31 are arranged in the front-to-back direction. One end of the large spring 321 and the four small springs 322 abuts against one side of the inner sleeve 30, the other end of the large spring 321 abuts against the front locking piece 31, the other ends of the two small springs 322 abut against the middle locking piece 31, and the other ends of the other two small springs 322 abut against the rear locking piece 31.

[0055] The front end of the intermediate sleeve 20 is provided with an unlocking block 21, and the unlocking block 21 is used to open the lock. The intermediate sleeve 20 is rotatably arranged in the outer sleeve 10, and the inner sleeve 30 is rotatably arranged in the intermediate sleeve 20. A movable groove 22 is provided on the intermediate sleeve 20, and the movable part 40 can move radially in the movable groove 22.

[0056] The outer sleeve 10 is provided with an accommodating portion 11, and the locking piece 31 or the inner sleeve 30 can push the movable part 40 to extend radially outward into the accommodating portion 11. The movable part 40 is provided with a plurality of avoidance portions 41 distributed along the axial direction of the intermediate sleeve 20, and the middle parts of the plurality of locking pieces 31 are provided with key holes 311 that are different from each other. The key 50 is provided with a plurality of steps 51 of different heights. When the key 50 passes through the key hole 311, the different steps 51 just push each locking piece 31 to the position of the corresponding avoidance portion 41. The spacing between the plurality of avoidance portions 41 is different. The plurality of avoidance portions 41 cooperate with the corresponding locking pieces 31 at the same time, so that the movable part 40 can radially disengage from the accommodating portion 11 inwardly, and the locking piece 31, the inner sleeve, the movable part 40 and the intermediate sleeve 20 can rotate synchronously.

[0057] The avoidance portion 41 is a avoidance groove provided on the inner side wall of the movable member 40 . In the unlocked state, the locking piece 31 is embedded in the avoidance groove to allow the movable member 40 to move radially inward and out of the accommodating portion 11 .

[0058] The first and second protrusions 42 and 43 are respectively provided on both sides of the avoidance groove, and a slot 44 is formed between the first and second protrusions 42 and 43. The outer wall of the locking plate 31 is provided with a block 312. In the unlocked state, the block 312 extends into the slot 44 to enable the locking plate 31 to drive the movable part 40 and the intermediate sleeve 20 to rotate. Specifically, the width of the slot 44 gradually increases from the outside to the inside, and the width of the block 312 gradually increases from the outside to the inside; by setting the width of the slot 44 and the block 312 to gradually increase from the outside to the inside, when the locking plate 31 drives the block 312 to rotate, the block 312 can drive the movable part 40 to rotate; when the movable part 40 cooperates with the accommodating portion 11, the block 312 can also smoothly disengage from the slot 44 to avoid the block 312 and the slot 44 from being stuck.

[0059] The locking piece 31 is respectively formed with a first shoulder 313 and a second shoulder 314 on both sides of the locking block 312, and the outer side walls of the first shoulder 313 and the second shoulder 314 are both arranged to protrude outward in an arc shape. In the unlocked state, the first protrusion 42 is in contact with the first shoulder 313, and the second protrusion 43 is in contact with the second shoulder 314; by providing the first shoulder 313 and the second shoulder 314, the outer side walls of the first shoulder 313 and the second shoulder 314 are both arranged to protrude outward in an arc shape, the first protrusion 42 can be in contact with the first shoulder 313, and the second protrusion 43 can be in contact with the second shoulder 314, thereby increasing the contact area between the movable part 40 and the locking piece 31, and the cooperation between the locking piece 31 and the movable part 40 is more stable when unlocking, and the unlocking is smoother.

[0060] The movable member 40 includes a rod portion 45 and a guide portion 46. The guide portion 46 is provided on the inner side of the rod portion 45. The avoidance portion 41 is provided on the inner side wall of the guide portion 46. The rod portion 45 can move radially in the movable groove 22. The guide portion 46 extends radially inward into the intermediate sleeve 20. A first guide slope 461 and a second guide slope 462 are formed on both sides of the guide portion 46. The first guide slope 461 extends outward from the inside to the outside in a direction away from the second guide slope 462. The second guide slope 462 extends outward from the inside to the outside in a direction away from the second guide slope 462. The two guide slopes 462 extend outward from the inside to the outside in a direction away from the first guide slope 461; by providing a movable part 40 composed of a rod portion 45 and a guide portion 46, the rod portion 45 can be radially moved in the movable groove 22, and a first guide slope 461 and a second guide slope 462 are respectively formed on both sides of the guide portion 46. The guiding effect enables the locking plate 31 and the inner sleeve 20 to smoothly push the movable part 40 toward the accommodating portion 11, preventing jamming or even locking, and achieving free idling of the locking plate 31 and the inner sleeve 20.

[0061] An inner curved surface 463 is provided between the first guiding inclined surface 461 and the second guiding inclined surface 462, and the outer side walls of the locking plate 31 and the inner sleeve 30 can both fit together with the inner curved surface 463. Specifically, the outer side walls of the inner sleeve 30, the first shoulder 313 and the second shoulder 314 can both fit together with the inner curved surface 463, and the outer side wall of the rod portion 45 is formed with an outwardly protruding outer curved surface 451, and the outer curved surface 451 can fit together with the inner side wall of the outer sleeve 10; by providing the inner curved surface 463, the outer side walls of the inner sleeve 30, the first shoulder 313 and the second shoulder 314 can both fit together with the inner curved surface 463, so that the inner sleeve 30, the first shoulder 313 and the second shoulder 314 remain stable with the movable part 40 during rotation, thereby improving the idling stability.

[0062] Specifically, the rod portion 45 and the guide portion 46 are integrally formed, and the length direction of the rod portion 45 is parallel to the axial direction of the intermediate sleeve 20 .

[0063] The accommodating portion 11 is an accommodating groove. In the locked state, the outer side of the movable member 40 extends into the accommodating groove. An elastic push member 12 is provided in the accommodating groove. One end of the elastic push member 12 abuts against the inner side wall of the accommodating groove, and the other end of the elastic push member 12 abuts against the movable member 40, so that the movable member 40 has a tendency to radially inwardly disengage from the accommodating groove. Specifically, the elastic push member 12 is a spring sheet, and the front end surface of the outer sleeve 10 is provided with a mounting opening 13 connected to the accommodating groove. The elastic push member 12 It is installed into the accommodating groove from the mounting opening 13. A mounting block 14 is provided in the mounting opening 13. The mounting block 14 is used to limit the elastic push member 12 from exiting the accommodating groove. It should be noted that when the sheet-type lock head 100 is installed in a specific direction, for example, the accommodating portion 11 is located directly above the inner sleeve 30, the movable member 40 can fall by its own gravity, so that it can be separated from the accommodating portion 11 without the elastic push member 12. By providing the elastic push member 12, the sheet-type lock head 100 can be installed in any direction.

[0064] The radial height h1 of the movable part 40 is greater than the vertical distance h2 between the inner sleeve 30 and the outer sleeve 10; by setting the radial height h1 of the movable part 40 to be greater than the vertical distance h2 between the inner sleeve 30 and the outer sleeve 10, the side of the movable part 40 away from the inner sleeve 30 can extend into the accommodating portion 11, and the length of the movable part 40 extending into the accommodating portion 11 is the difference between h1 and h2, thereby ensuring that the movable part 40 will not rotate with the inner sleeve 30 and the locking plate 31 in the locked state.

[0065] The front end of the outer sleeve 10 is provided with a retaining ring 15, and the retaining ring 15 limits the intermediate sleeve 20 from detaching forward from the outer sleeve 10. The front end outer side wall of the intermediate sleeve 20 is provided with a fixing block 23, and the front end inner side wall of the outer sleeve 10 is provided with an arc groove 16. The fixing block 23 extends into the arc groove 16, and the fixing block 23 cooperates with the arc groove 16 to limit the maximum rotation angle of the intermediate sleeve 20. Specifically, the maximum rotation angle of the intermediate sleeve 20 is 90 degrees.

[0066] It should be noted that, in the present invention, one locking block 312 may be provided on the same locking piece 31 , or two or more locking blocks 312 may be provided.

[0067] The rear end of the inner sleeve 30 is provided with a first socket 302 for inserting the key 50, and the rear end of the outer sleeve 10 is provided with a second socket 17 for the first socket 302 to be exposed backward. At least one side of the first socket 302 is provided with an anti-foolproofing piece 33 corresponding to the anti-foolproofing groove 52 on the key 50; by arranging the anti-foolproofing piece 33 in the first socket 302, the anti-foolproofing piece 33 and the anti-foolproofing groove 52 on the key 50 can be used as a matching structure, thereby increasing the matching number of the lock and the key 50.

[0068] The anti-idiot part 33 is linearly slidably connected to the inner sleeve 30, and the anti-idiot groove 52 is a non-linear anti-idiot groove 52. Specifically, the anti-idiot groove 52 is a wavy anti-idiot groove 52. By adopting the non-linear anti-idiot groove 52, the anti-theft performance and matching number are enhanced.

[0069] The anti-foolproofing component 33 includes a sliding rod 331 and an anti-foolproofing block 332 provided on the sliding rod 331. The sliding rod 331 is linearly slidably connected to the inner sleeve 30. The sliding rod 331 is linearly slidably connected to the inner sleeve 30, and the anti-foolproofing block 332 can move linearly with the sliding rod 331.

[0070] A sliding groove 303 is provided on the inner sleeve 30, and a long hole 304 is provided on the inner wall of the first insertion hole 302 to limit the movement of the anti-crash block 332. The long hole 304 is connected to the sliding groove 303, and the length direction of the long hole 304 is the same as the length direction of the sliding groove 303. The sliding rod 331 is slidably arranged in the sliding groove 303, and the anti-crash block 332 passes through the long hole 304 and extends into the first insertion hole 302. The vertical distance b1 between the highest point and the lowest point of the non-linear anti-crash groove 52 is equal to the length b2 of the long hole 304.

[0071] The inner sleeve 30 is provided with a reset mechanism 34 that enables the anti-foolproof part 33 to always return to its original position. The reset mechanism 34 is a reset spring, one end of the reset spring abuts against the inner sleeve 30, and the other end of the reset spring abuts against the anti-foolproof part 33. Specifically, an extension arm 333 is provided on the slide rod 331, and the other end of the reset spring abuts against the extension arm 333. Exemplarily, two reset springs are provided, one end of the two reset springs abuts against the opposite sides of the extension arm 333 respectively, and the other ends of the two reset springs abut against the inner sleeve 30; by providing the reset mechanism 34, the reset mechanism 34 restores the anti-foolproof part 33 to its original position after the key 50 is pulled out, making it convenient for the anti-foolproof groove 52 to align with the anti-foolproof part 33 when unlocking next time.

[0072] Anti-foolproofing parts 33 are provided on both opposite sides of the first socket 302. Optionally, both of the anti-foolproofing parts 33 are fixedly connected to the inner sleeve 30 in a fixed manner, or both of the anti-foolproofing parts 33 are linearly slidably connected to the inner sleeve 30 in a sliding manner, or one of the anti-foolproofing parts 33 is fixed and the other anti-foolproofing part 33 is slidably.

[0073] It should be noted that the two anti-foolproofing parts 33 can be arranged axially symmetrically or centrally symmetrically, or asymmetrically, so as to increase the number of matching numbers between the lock and the key 50, thereby increasing the number-changing function of the key 50. In addition, since the key 50 is provided with a step 51 corresponding to the key hole 311 on the lock plate 31, the position of the anti-foolproofing groove 52 needs to avoid the step 51 on the key 50, then the position of the anti-foolproofing part 33 in the first socket 302 is correspondingly set within the range of 150 degrees or 300 degrees, that is, the installation position of the anti-foolproofing part 33 occupies an angle of less than 300 degrees of the first socket 302.

[0074] like Figure 13 As shown, when the anti-idiot part 33 is connected to the inner sleeve 30 in a fixed manner, the cross-section of the anti-idiot part 33 can be a triangular, trapezoidal, rectangular or other structure, and the anti-idiot groove 52 on the key 50 corresponds to a linear anti-idiot groove 52.

[0075] It should also be noted that, in addition to adopting a triangular cross section, a trapezoidal cross section or a rectangular cross section, the foolproof member 33 of the present invention can also be changed into a variety of shapes.

[0076] like Figure 14-15As shown, in the second embodiment, the difference from the first embodiment is that, in the unlocked state, the inner side of the movable part 40 can extend into the mounting groove 301 on the inner sleeve 30, and the inner side walls on both sides of the mounting groove 301 can push the movable part 40, thereby driving the movable part 40 to rotate. At this time, the locking plate 31 only cooperates with the avoidance portion 41 to make the movable part 40 disengage from the accommodating portion 11, but does not drive the movable part 40 to rotate.

[0077] The elastic push member 12 is a pressure spring, and the accommodating groove passes through the outer wall of the outer sleeve 10. One end of the pressure spring is connected to a push member 18, and the side of the push member 18 away from the pressure spring can abut against the movable member 40, and the other end of the pressure spring abuts against the mounting plate 19, and the mounting plate 19 is installed in the accommodating groove.

[0078] The method of using the present invention is as follows: insert the key 50 forward into the first insertion hole 302 and the key through hole 311 in sequence. During the forward movement of the key 50, the anti-fool block 332 overcomes the elastic force of the return spring and moves along the wavy anti-fool groove 52. Since the long hole 304 limits the movement stroke of the anti-fool block 332, if the anti-fool block 332 does not match the anti-fool groove 52, the anti-fool block 332 and the wavy anti-fool groove 52 will be stuck, making it impossible for the key 50 to continue to be inserted. If the anti-fool block 332 matches the anti-fool groove 52, the key 50 can continue to be inserted. The three steps 51 on the key 50 push the three locking plates 31 forward respectively. The three locking plates 31 reach the position of the corresponding avoidance parts 41, and the key is turned. 50 drives the locking plate 31 and the inner sleeve 30 to rotate synchronously. When the block 312 on the locking plate 31 is aligned with the slot 44 on the movable part 40, the elastic pushing member 12 pushes the movable part 40 inward, causing the movable part 40 to disengage from the accommodating portion 11. The key 50 is turned again to cause the inner sleeve 30, the locking plate 31, the movable part 40 and the intermediate sleeve 20 to rotate synchronously. The intermediate sleeve 20 drives the unlocking block 21 to rotate to open the lock. In the locked state, since the block 312 on the locking plate 31 is not aligned with the slot 44 on the movable part 40, the movable part 40 cannot disengage from the accommodating portion 11. At this time, the key 50 can only drive the inner sleeve 30 and the locking plate 31 to rotate idly, while the intermediate sleeve 20 and the movable part 40 do not rotate.

[0079] In summary, the present invention provides an intermediate sleeve 20 and a movable member 40. The intermediate sleeve 20 is rotatably arranged in the outer sleeve 10, and the inner sleeve 30 is rotatably arranged in the intermediate sleeve 20. The movable member 40 can move radially in the movable groove 22 on the intermediate sleeve 20. The outer sleeve 10 is provided with a receiving portion 11, and the movable member 40 is provided with a plurality of avoidance portions 41. In the locked state, since the movable member 40 can move radially, when the locking plate 31 and the inner sleeve 30 are rotated, the movable member 40 is 40 is pushed radially outward into the accommodating portion 11 by the locking plate 31 and the inner sleeve 30, so that the locking plate 31 and the inner sleeve 30 can rotate freely, thereby enhancing the anti-theft performance; in the unlocked state, the locking plate 31 is pushed and rotated by the key 50. When multiple avoidance portions 41 are simultaneously engaged with the corresponding locking plates 31, the movable part 40 can be separated from the accommodating portion 11, and the locking plate 31, the inner sleeve 30, the movable part 40 and the intermediate sleeve 20 can rotate synchronously, thereby achieving unlocking.

[0080] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Therefore, any modifications, equivalent replacements, improvements, etc. made to the above embodiments based on the technical practice of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A disc-type lock head, comprising an outer sleeve and an inner sleeve, wherein the inner sleeve is provided with a plurality of locking discs and a plurality of elastic elements, wherein the plurality of locking discs and the plurality of elastic elements can rotate synchronously with the inner sleeve, characterized in that: The invention also includes an intermediate sleeve and a movable member, wherein the intermediate sleeve is rotatably arranged in the outer sleeve, and the inner sleeve is rotatably arranged in the intermediate sleeve. The intermediate sleeve is provided with a movable groove, and the movable member is radially movable in the movable groove. A accommodating portion is provided in the outer sleeve, and the locking plate or the inner sleeve can push the movable part radially outward into the accommodating portion. A plurality of avoidance portions are provided on the movable part, and the plurality of avoidance portions cooperate with the corresponding locking plates at the same time to allow the movable part to be disengaged from the accommodating portion, and the locking plate, the inner sleeve, the movable part and the intermediate sleeve to rotate synchronously.

2. The plate-type lock according to claim 1, characterized in that: The avoidance portion is a avoidance groove provided on the inner side wall of the movable member. In the unlocked state, the locking piece is embedded in the avoidance groove to enable the movable member to move radially inwardly to escape from the accommodating portion.

3. The plate-type lock according to claim 2, characterized in that: A first protrusion and a second protrusion are respectively provided on both sides of the avoidance groove, and a card slot is formed between the first protrusion and the second protrusion. A card block is provided on the outer side wall of the locking plate. In the unlocked state, the card block extends into the card slot so that the locking plate drives the movable part and the intermediate sleeve to rotate.

4. The plate-type lock according to claim 3, characterized in that: The locking piece is located on both sides of the locking block and is respectively formed with a first shoulder and a second shoulder. The outer side walls of the first shoulder and the second shoulder are both arc-shaped and protrude outward. In the unlocked state, the first protrusion is in contact with the first shoulder, and the second protrusion is in contact with the second shoulder.

5. The plate-type lock according to claim 1, characterized in that: The accommodating portion is an accommodating groove, and in the locked state, the outer side of the movable member extends into the accommodating groove.

6. The plate-type lock according to claim 5, characterized in that: An elastic push piece is provided in the accommodating groove, one end of the elastic push piece abuts against the inner side wall of the accommodating groove, and the other end of the elastic push piece abuts against the movable piece, so that the movable piece has a tendency to leave the accommodating groove.

7. The plate-type lock according to claim 1, characterized in that: The radial height h1 of the movable member is greater than the vertical distance h2 between the inner sleeve and the outer sleeve.

8. The plate-type lock according to claim 1, characterized in that: The front end outer wall of the middle sleeve is provided with a fixing block, and the front end inner wall of the outer sleeve is provided with an arc groove. The fixing block extends into the arc groove, and the fixing block cooperates with the arc groove to limit the maximum rotation angle of the middle sleeve.

9. The plate-type lock according to claim 1, characterized in that: The rear end of the inner sleeve is provided with a first socket for inserting the key, and the rear end of the outer sleeve is provided with a second socket for exposing the first socket. At least one side of the first socket is provided with an anti-foolproofing piece corresponding to the anti-foolproofing groove on the key.

10. The plate-type lock according to claim 9, characterized in that: The fool-proofing piece is linearly slidably connected to the inner sleeve, and the fool-proofing groove is a non-linear fool-proofing groove.

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