Lock

Abstract

The present invention provides a lock. The lock includes: a front panel having a mounting recess, a mounting hole and a receiving cavity, the mounting recess communicating with the receiving cavity through the mounting hole; a touch bracket detachably disposed in the receiving cavity; a PCB board disposed in the mounting hole and connected to the touch bracket; a touch panel disposed in the mounting recess, the PCB board being located between the touch panel and the touch bracket; a positioning component including a first positioning portion and a second positioning portion, the first positioning portion being disposed on the touch bracket, the second positioning portion being disposed on the PCB board, one of the first positioning portion and the second positioning portion being a first protrusion, the other of the first positioning portion and the second positioning portion being a first recess, the first protrusion extending into the first recess and being in limit fit with the first recess. The present invention effectively solves the problem of poor assembly accuracy between the touch bracket and the PCB board in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of locks, and more particularly, to a lock. Background Art

[0002] At present, due to the many advantages of smart door locks over traditional mechanical door locks, such as convenience, speed, and security, the user group of smart door locks is increasing day by day. In the prior art, the touch bracket and the PCB board of the lock are usually connected by a snap-fit method.

[0003] However, during the assembly process of the touch bracket and the PCB board, the above connection method affects the assembly accuracy of the two, and even affects the ex-factory quality of the lock. Summary of the Invention

[0004] The main object of the present invention is to provide a lock to solve the problem of poor assembly accuracy between the touch bracket and the PCB board in the prior art.

[0005] To achieve the above object, the present invention provides a lock, including: a front panel having an installation recess, an installation hole, and a receiving cavity, the installation recess communicating with the receiving cavity through the installation hole; a touch bracket detachably disposed in the receiving cavity; a PCB board disposed in the installation hole and connected to the touch bracket; a touch panel disposed in the installation recess, the PCB board being located between the touch panel and the touch bracket; a positioning component including a first positioning portion and a second positioning portion, the first positioning portion being disposed on the touch bracket, the second positioning portion being disposed on the PCB board, one of the first positioning portion and the second positioning portion being a first protrusion, the other of the first positioning portion and the second positioning portion being a first recess, the first protrusion extending into the first recess and being in limit fit with the first recess.

[0006] Further, there is one first positioning portion and one second positioning portion; or, there are multiple second positioning portions, the multiple second positioning portions being spaced along the length direction and / or the width direction of the PCB board, and one first positioning portion can be selectively in limit fit with at least one second positioning portion; there are multiple first positioning portions and one second positioning portion, and one second positioning portion can be selectively in limit fit with at least one first positioning portion; or, there are multiple second positioning portions, the multiple second positioning portions being spaced along the length direction and / or the width direction of the PCB board, and the multiple second positioning portions are arranged in one-to-one correspondence with the multiple first positioning portions.

[0007] Further, the first positioning portion is a first recess, the second positioning portion is a first protrusion, and the first protrusion is made of an insulating material.

[0008] Further, the first protrusion is a convex bump, the first recess is a groove, and the shape of the groove is adapted to the shape of the convex bump.

[0009] Further, the first protrusion includes: a first cylindrical section, one end of the first cylindrical section being connected to the PCB board; a second cylindrical section, the other end of the first cylindrical section being connected to the second cylindrical section, a limiting step being formed between the first cylindrical section and the second cylindrical section, the limiting step being used for limiting and stopping against the first recess; wherein, the orthographic projection of the second cylindrical section within the first cylindrical section is located within the first cylindrical section.

[0010] Further, there are multiple first protrusions, and the sizes of the cross-sections of at least two first protrusions are different; wherein, the cross-section of the first protrusion is a polygon, or a circle, or a semi-circle, or an ellipse, or a kidney shape, and the cross-section is arranged parallel to the PCB board.

[0011] Further, at least part of the PCB board protrudes towards the touch bracket to form the first protrusion.

[0012] Further, the lock further includes: a first mating component, including a first mating portion and a second mating portion, the first mating portion being arranged on the PCB board, the second mating portion being arranged on the touch bracket, one of the first mating portion and the second mating portion being a second protrusion, the other of the first mating portion and the second mating portion being a second recess, the second protrusion extending into the second recess and being in stop fit with the second recess to connect the PCB board and the touch bracket; a fastener, the fastener passing through the PCB board and the touch bracket, and the fastener being arranged at an interval from the mating component.

[0013] Further, the lock further includes: a second mating component, including a third mating portion and a fourth mating portion, the third mating portion being arranged on the PCB board, the fourth mating portion being arranged on the touch bracket, one of the third mating portion and the fourth mating portion being a third protrusion, the other of the third mating portion and the fourth mating portion being a third recess, the third protrusion extending into the third recess and being in stop fit with the third recess; a sliding portion, arranged on the touch bracket and having a sliding groove, at least part of the front panel extending into the sliding groove and being slidable along the extending direction of the sliding groove until the third protrusion extends into the third recess and is in limiting fit with the third recess to connect the front panel and the touch bracket.

[0014] Further, the lock further includes: a sealing structure, arranged between the touch bracket and the front panel; wherein, the sealing structure is made of at least one of rubber, silica gel and cotton pad.

[0015] Applying the technical solution of the present invention, the lock further includes a positioning component. The positioning component includes a first positioning portion and a second positioning portion. The first positioning portion is disposed on the touch bracket, and the second positioning portion is disposed on the PCB board. One of the first positioning portion and the second positioning portion is a first protrusion, and the other of the first positioning portion and the second positioning portion is a first recess. The first protrusion extends into the first recess and is in limit fit with the first recess. In this way, during the assembly process of the touch bracket and the PCB board, the mutual positioning between the touch bracket and the PCB board can be realized through the limit fit between the first protrusion and the first recess. After the positioning component completes the positioning, the touch bracket and the PCB board are then connected, thereby solving the problem of poor assembly accuracy between the touch bracket and the PCB board in the prior art and improving the assembly accuracy of the touch bracket and the PCB board. At the same time, after the touch bracket and the PCB board are assembled, the above setting of the positioning component can position the relative position relationship between the two, preventing relative movement or crosstalk between the two from affecting the structural stability of the lock. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0017] Figure 1 An exploded view of an embodiment of a lock according to the present invention is shown;

[0018] Figure 2 Shows Figure 1 an exploded view of the touch bracket and the PCB board of the lock in

[0019] Figure 3 Shows Figure 2 a partially enlarged view of part A of the lock in

[0020] Figure 4 Shows Figure 1 a three-dimensional cross-sectional view of the lock in

[0021] Among them, the above-mentioned drawings include the following reference numerals:

[0022] 10, front panel; 11, mounting recess; 12, mounting hole; 13, accommodation cavity; 20, touch bracket; 23, PCB board mounting side; 24, PCB board stop side; 30, PCB board; 40, touch panel; 51, first positioning portion; 52, second positioning portion; 61, third mating portion; 62, fourth mating portion; 70, sliding portion; 71, sliding groove; 74, first plate body; 75, second plate body; 76, third plate body; 80, sealing structure; 90, screw or bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0024] It should be pointed out that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs.

[0025] In the present invention, unless otherwise stated, the orientation terms such as "upper, lower" are generally in the direction shown in the drawings, or in the vertical, perpendicular or gravitational direction; similarly, for ease of understanding and description, "left, right" are generally in the left and right shown in the drawings; "inner, outer" refer to the inner and outer of the contour of each component itself, but the above orientation terms do not limit the present invention.

[0026] In order to solve the problem of poor assembly accuracy between the touch bracket and the PCB board in the prior art, the present application provides a lock.

[0027] Embodiment 1

[0028] As Figures 1 to 4 shown, the lock includes a front panel 10, a touch bracket 20, a PCB board 30, a touch panel 40 and a positioning component. Among them, the front panel 10 has a mounting recess 11, a mounting hole 12 and a receiving cavity 13, and the mounting recess 11 communicates with the receiving cavity 13 through the mounting hole 12. The touch bracket 20 is detachably arranged in the receiving cavity 13. The PCB board 30 is arranged in the mounting hole 12 and connected to the touch bracket 20. The touch panel 40 is arranged in the mounting recess 11, and the PCB board 30 is located between the touch panel 40 and the touch bracket 20. The positioning component includes a first positioning portion 51 and a second positioning portion 52. The first positioning portion 51 is arranged on the touch bracket 20, and the second positioning portion 52 is arranged on the PCB board 30. One of the first positioning portion 51 and the second positioning portion 52 is a first protrusion, and the other of the first positioning portion 51 and the second positioning portion 52 is a first recess. The first protrusion extends into the first recess and is in limit fit with the first recess.

[0029] Applying the technical solution of this embodiment, during the assembly process of the touch bracket and the PCB board, the mutual positioning between the touch bracket and the PCB board can be realized through the limit fit between the first protrusion and the first recess. After the positioning component completes the positioning, the touch bracket and the PCB board are connected, thereby solving the problem of poor assembly accuracy between the touch bracket and the PCB board in the prior art and improving the assembly accuracy of the touch bracket and the PCB board. At the same time, after the touch bracket and the PCB board are assembled, the above setting of the positioning component can position the relative position relationship between the two, avoiding relative movement or crosstalk between the two and affecting the structural stability of the lock.

[0030] Optionally, there is one first positioning portion 51 and one second positioning portion 52; alternatively, there are multiple second positioning portions 52, and the multiple second positioning portions 52 are arranged at intervals along the length direction and / or the width direction of the PCB board 30, and one first positioning portion 51 can be selectively in limit fit with at least one second positioning portion 52; there are multiple first positioning portions 51 and one second positioning portion 52, and one second positioning portion 52 can be selectively in limit fit with at least one first positioning portion 51; or, there are multiple second positioning portions 52, and the multiple second positioning portions 52 are arranged at intervals along the length direction and / or the width direction of the PCB board 30, and the multiple second positioning portions 52 and the multiple first positioning portions 51 are arranged in one-to-one correspondence. In this way, the above settings make the selection of the number of the first positioning portion 51 and the second positioning portion 52 more flexible to meet different usage requirements and working conditions, and also improve the processing flexibility of the staff. At the same time, when the numbers of the first positioning portion 51 and the second positioning portion 52 are inconsistent, the staff can select the used first positioning portion 51 and / or second positioning portion 52 according to the usage requirements; when both the first positioning portion 51 and the second positioning portion 52 are multiple and the numbers are the same, each first positioning portion 51 is in limit fit with its corresponding second positioning portion 52, which improves the overall positioning reliability of the positioning assembly.

[0031] In this embodiment, there are four first positioning portions 51 and four second positioning portions 52. The four second positioning portions 52 are arranged at intervals along the length direction and the width direction of the PCB board 30, and the four first positioning portions 51 and the four second positioning portions 52 are arranged in one-to-one correspondence, thereby increasing the matching area between the first positioning portion 51 and the second positioning portion 52 and further improving the positioning reliability of the positioning assembly.

[0032] It should be noted that the number of the first positioning portions 51 is not limited to this and can be adjusted according to the working conditions and usage requirements. Optionally, the first positioning portion 51 is one, or two, or three, or five, or multiple.

[0033] It should be noted that the number of the second positioning portions 52 is not limited to this and can be adjusted according to the working conditions and usage requirements. Optionally, the second positioning portion 52 is one, or two, or three, or five, or multiple.

[0034] In this embodiment, the first positioning portion 51 is a first recess, and the second positioning portion 52 is a first protrusion, and the first protrusion is made of an insulating material. In this way, by setting the first protrusion on the PCB board for positioning, there is no need to perform cutting and removal processing on the PCB board to ensure that the PCB board can operate normally, and the processing cost of the PCB board is also reduced. At the same time, the above settings avoid short circuits at the first protrusion from affecting the normal use of the lock.

[0035] In this embodiment, the first protrusion is a convex hull, and the first recess is a groove, and the shape of the groove is adapted to that of the convex hull. In this way, on the one hand, the above settings make the structures of the first protrusion and the first recess simpler, easier to process and implement, reducing the processing cost and difficulty of the two; on the other hand, the contact area between the first protrusion and the first recess is increased, improving the positioning reliability of the positioning component.

[0036] In other embodiments not shown in the drawings, the first protrusion includes a first cylindrical section and a second cylindrical section. One end of the first cylindrical section is connected to the PCB board. The other end of the first cylindrical section is connected to the second cylindrical section, and a limiting step is formed between the first cylindrical section and the second cylindrical section, and the limiting step is used for limiting and stopping with the first recess. Wherein, the orthographic projection of the second cylindrical section within the first cylindrical section is located within the first cylindrical section. In this way, on the one hand, the above settings make the structure of the first protrusion simpler, easier to process and implement, reducing the processing cost of the first protrusion. At the same time, after the first protrusion and the first recess are fitted, the limiting step and the first recess are stopped and fitted to ensure a preset gap between the touch bracket and the PCB board.

[0037] Optionally, there are multiple first protrusions, and the cross-sectional dimensions of at least two first protrusions are different. In this way, during the assembly process of the touch bracket 20 and the PCB board 30, the above settings of the first protrusion can play an anti-fooling role and prevent the PCB board 30 from being installed reversely.

[0038] In this embodiment, there are four first protrusions, and every two first protrusions form a group and have the same cross-sectional dimensions, and the cross-sectional dimensions of each group of first protrusions are different.

[0039] Optionally, the cross-section of the first protrusion is a polygon, or a circle, or a semi-circle, or an ellipse, or a kidney shape, and the cross-section is arranged parallel to the PCB board 30. In this way, the above settings make the shape of the first protrusion more diverse to meet different usage requirements and working conditions, and also improve the processing flexibility of the staff.

[0040] In this embodiment, the cross-section of the first protrusion is a circle, and the first protrusion is a convex hull.

[0041] In this embodiment, at least part of the PCB board 30 protrudes towards the touch bracket 20 to form the first protrusion. In this way, on the one hand, the above settings make the structure of the first protrusion simpler, easier to process and implement, reducing the processing cost of the first protrusion; on the other hand, the structural strength of the PCB board 30 is ensured, and the service life of the PCB board 30 is extended.

[0042] Such as Figure 2 and Figure 3As shown, the lock further includes a second mating component and a sliding portion 70. Among them, the second mating component includes a third mating portion 61 and a fourth mating portion 62. The third mating portion 61 is disposed on the PCB board 30, and the fourth mating portion 62 is disposed on the touch bracket 20. One of the third mating portion 61 and the fourth mating portion 62 is a third protrusion, and the other of the third mating portion 61 and the fourth mating portion 62 is a third recess. The third protrusion extends into the third recess and is in a stop fit with the third recess. The sliding portion 70 is disposed on the touch bracket 20 and has a sliding groove 71. At least a part of the front panel 10 extends into the sliding groove 71 and can slide along the extending direction of the sliding groove 71 until the third protrusion extends into the third recess and is in a limit fit with the third recess to connect the front panel 10 and the touch bracket 20. In this way, when it is necessary to assemble the touch bracket 20 and the PCB board 30, only need to operate the PCB board 30 to slide along the sliding groove 71 until the third mating portion 61 and the fourth mating portion 62 are in a limit fit, then the assembly of the touch bracket 20 and the PCB board 30 can be completed, reducing the disassembly and assembly difficulty of the two. At the same time, when it is necessary to disassemble the touch bracket 20 and the PCB board 30, the staff operates the third mating portion 61 and the fourth mating portion 62 to separate them from each other, and then slides the PCB board 30 along the sliding groove 71, then the disassembly of the touch bracket 20 and the PCB board 30 can be completed, reducing the labor intensity of the staff.

[0043] As Figure 2 shown, the touch bracket 20 has a PCB board mounting side 23 and a PCB board stop side 24. The sliding portion 70 is located between the PCB board mounting side 23 and the PCB board stop side 24, and the fourth mating portion 62 is disposed on the PCB board stop side 24. In this way, when it is necessary to assemble the touch bracket 20 and the PCB board 30, the PCB board 30 is inserted into the touch bracket 20 from the PCB board mounting side 23, so that both sides of the PCB board 30 extend into the sliding groove 71 and slide along the sliding groove 71. When the PCB board 30 slides to the PCB board stop side 24, the third mating portion 61 and the fourth mating portion 62 are in a limit stop, and at this time the assembly of the touch bracket 20 and the PCB board 30 is completed. At the same time, the above setting makes the layout of the fourth mating portion 62 and the sliding portion 70 on the touch bracket 20 more reasonable and compact, improving the space utilization rate of the touch bracket 20.

[0044] Specifically, when it is necessary to remove the PCB board 30 from the touch bracket 20, first operate the third mating portion 61 and the fourth mating portion 62 to separate from each other, and slide the PCB board 30 along the sliding groove 71 in the direction from the PCB board stop side 24 to the PCB board mounting side 23 until the PCB board 30 slides to the PCB board mounting side 23, and then the disassembly of the PCB board 30 and the touch bracket 20 is completed.

[0045] As Figure 3As shown, the sliding part 70 includes a first plate body 74, a second plate body 75 and a third plate body 76. Among them, the first plate body 74 is arranged on the touch bracket 20. The second plate body 75 is connected to the first plate body 74 and is arranged at a first included angle with the first plate body 74. The third plate body 76 is connected to the second plate body 75 and is arranged at a second included angle with the second plate body 75. The first plate body 74 and the third plate body 76 are located on the same side of the second plate body 75. The first plate body 74, the second plate body 75 and the third plate body 76 surround to form a chute 71. In this way, the above settings make the structure of the sliding part 70 simpler, easier to process and implement, and reduce the processing cost of the sliding part 70.

[0046] In this embodiment, the first included angle is 90°, the second included angle is 90°, the first plate body 74 and the second plate body 75 are arranged perpendicular to each other, and the first plate body 74 and the third plate body 76 are arranged parallel to each other, so that the chute 71 is a rectangular groove, and the rectangular groove is adapted to the PCB board 30, reducing the processing cost and processing difficulty of the sliding part 70.

[0047] In this embodiment, the third protrusion is a hook, and the third recess is a through hole. In this way, the hook extends into the through hole and is clamped with the through hole to realize the assembly of the PCB board 30 and the touch bracket 20. At the same time, the above settings make the structures of the third protrusion and the third recess simpler, easier to process and implement, and reduce the processing cost of the lock.

[0048] Optionally, there is one third mating part 61 and one fourth mating part 62; or, there are multiple third mating parts 61 and multiple fourth mating parts 62. The multiple fourth mating parts 62 are arranged at intervals in the second direction, and the multiple fourth mating parts 62 are arranged in one-to-one correspondence with the multiple third mating parts 61; the second direction is arranged at a third included angle with the sliding direction of the PCB board 30. In this way, the above settings make the selection of the number of the third mating part 61 and the fourth mating part 62 more flexible to meet different usage requirements and working conditions, and also improve the processing flexibility of the staff. At the same time, when there are multiple third mating parts 61 and multiple fourth mating parts 62, the mating area between the two is increased, thereby improving the assembly stability of the PCB board 30 and the touch bracket 20.

[0049] In this embodiment, there is one third mating part 61 and one fourth mating part 62, so that the structure of the lock is simpler, easier to process and implement, reducing the processing cost and processing difficulty of the lock. At the same time, the above settings make the disassembly and assembly of the PCB board 30 and the touch bracket 20 easier and more convenient.

[0050] Optionally, the sliding part 70 is movably arranged on the touch bracket 20. In this way, the position of the sliding part 70 can be adjusted according to the size and specification of the PCB board 30, thereby improving the versatility of the touch bracket 20.

[0051] As Figure 1 and Figure 4 shown, the lock further includes a sealing structure 80. The sealing structure 80 is disposed between the touch bracket 20 and the front panel 10. Among them, the sealing structure 80 is made of at least one of rubber, silica gel, and cotton pads. In this way, the above setting of the sealing structure 80 can prevent impurities such as dust from entering the lock through the connection between the touch bracket 20 and the front panel 10, thereby improving the internal cleanliness of the lock and ensuring the normal use of the lock. At the same time, the above setting makes the material selection of the sealing structure 80 more flexible to meet different usage requirements and working conditions, and also improves the processing flexibility of the staff.

[0052] Optionally, the sealing structure 80 is annular.

[0053] As Figure 1 shown, the lock further includes a screw or a bolt 90. Among them, the screw or the bolt 90 passes through the touch bracket 20 and the front panel 10 to tightly connect the touch bracket 20 and the front panel 10.

[0054] Embodiment 2

[0055] The difference between the lock in Embodiment 2 and that in Embodiment 1 is that the connection method between the PCB board 30 and the touch bracket 20 is different.

[0056] In this embodiment, the lock further includes a first mating component and a fastener. Among them, the first mating component includes a first mating portion and a second mating portion. The first mating portion is disposed on the PCB board 30, and the second mating portion is disposed on the touch bracket 20. One of the first mating portion and the second mating portion is a second protrusion, and the other of the first mating portion and the second mating portion is a second recess. The second protrusion extends into the second recess and is in stop fit with the second recess to connect the PCB board 30 and the touch bracket 20. The fastener passes through the PCB board 30 and the touch bracket 20, and the fastener is spaced apart from the mating component. In this way, when assembling the touch bracket 20 and the PCB board 30, first operate the first mating portion and the second mating portion to make them in stop fit, and then fasten the PCB board 30 and the touch bracket 20 through the fastener, thereby improving the connection strength between the PCB board 30 and the touch bracket 20.

[0057] Optionally, the fastener is a screw or a bolt.

[0058] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0059] The lock further includes a positioning component. The positioning component includes a first positioning portion and a second positioning portion. The first positioning portion is disposed on the touch bracket, and the second positioning portion is disposed on the PCB board. One of the first positioning portion and the second positioning portion is a first protrusion, and the other of the first positioning portion and the second positioning portion is a first recess. The first protrusion extends into the first recess and is in limit fit with the first recess. In this way, during the assembly process of the touch bracket and the PCB board, the mutual positioning between the touch bracket and the PCB board can be realized through the limit fit between the first protrusion and the first recess. After the positioning component completes the positioning, the touch bracket and the PCB board are then connected, thereby solving the problem of poor assembly accuracy between the touch bracket and the PCB board in the prior art and improving the assembly accuracy of the touch bracket and the PCB board. At the same time, after the touch bracket and the PCB board are assembled, the above setting of the positioning component can position the relative positional relationship between the two, avoiding relative movement or crosstalk between the two and affecting the structural stability of the lock.

[0060] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0061] It should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0062] It should be noted that the terms "first", "second", etc. in the description, claims and drawings of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0063] The above are only the preferred embodiments of the present invention, and are not used to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A lock, characterized in that, Comprising: A front panel (10) having a mounting recess (11), a mounting hole (12) and a receiving cavity (13), the mounting recess (11) communicating with the receiving cavity (13) through the mounting hole (12); A touch bracket (20) detachably disposed within the receiving cavity (13); A PCB board (30) disposed within the mounting hole (12) and connected to the touch bracket (20); A touch panel (40) disposed within the mounting recess (11), the PCB board (30) being located between the touch panel (40) and the touch bracket (20); A positioning assembly including a first positioning portion (51) and a second positioning portion (52), the first positioning portion (51) being disposed on the touch bracket (20), the second positioning portion (52) being disposed on the PCB board (30), one of the first positioning portion (51) and the second positioning portion (52) being a first protrusion, the other of the first positioning portion (51) and the second positioning portion (52) being a first recess, the first protrusion extending into the first recess and being in limiting cooperation with the first recess; The lock further includes: A second mating assembly including a third mating portion (61) and a fourth mating portion (62), the third mating portion (61) being disposed on the PCB board (30), the fourth mating portion (62) being disposed on the touch bracket (20), one of the third mating portion (61) and the fourth mating portion (62) being a third protrusion, the other of the third mating portion (61) and the fourth mating portion (62) being a third recess, the third protrusion extending into the third recess and being in stop cooperation with the third recess; A sliding portion (70) disposed on the touch bracket (20) and having a sliding groove (71), at least a part of the front panel (10) extending into the sliding groove (71) and being slidable along the extending direction of the sliding groove (71) until the third protrusion extends into the third recess and is in limiting cooperation with the third recess to connect the front panel (10) and the touch bracket (20); The first protrusions are multiple, and the cross-sectional dimensions of at least two of the first protrusions are different.

2. The lock according to claim 1, wherein The first positioning portion (51) is one, and the second positioning portion (52) is one; or, the second positioning portion (52) is multiple, and the multiple second positioning portions (52) are spaced apart along the length direction and / or the width direction of the PCB board (30), and one first positioning portion (51) can be selectively in limiting cooperation with at least one of the second positioning portions (52); The first positioning portions (51) are multiple, and the second positioning portion (52) is one. The second positioning portion (52) can selectively limit and cooperate with at least one of the first positioning portions (51); alternatively, the second positioning portions (52) are multiple, and the multiple second positioning portions (52) are arranged at intervals along the length direction and / or width direction of the PCB board (30), and the multiple second positioning portions (52) are arranged corresponding to the multiple first positioning portions (51) one by one.

3. The lock according to claim 1, characterized in that, The first positioning portion (51) is a first recess, and the second positioning portion (52) is a first protrusion, and the first protrusion is made of an insulating material.

4. The lock according to claim 3, characterized in that, The first protrusion is a convex bump, the first recess is a groove, and the shape of the groove is adapted to that of the convex bump.

5. The lock according to claim 3, characterized in that, The first protrusion includes: A first cylindrical section, one end of the first cylindrical section is connected to the PCB board (30); A second cylindrical section, the other end of the first cylindrical section is connected to the second cylindrical section, and a limiting step is formed between the first cylindrical section and the second cylindrical section, and the limiting step is used for limiting and stopping against the first recess; Wherein, the orthographic projection of the second cylindrical section in the first cylindrical section is located within the first cylindrical section.

6. The lock according to claim 3, characterized in that, The cross-section of the first protrusion is polygonal, or circular, or semi-circular, or elliptical, or kidney-shaped, and the cross-section is arranged parallel to the PCB board (30).

7. The lock according to claim 3, characterized in that, At least a part of the PCB board (30) protrudes towards the touch bracket (20) to form the first protrusion.

8. The lock according to claim 1, characterized in that, The lock further includes: A first matching component, including a first matching portion and a second matching portion. The first matching portion is arranged on the PCB board (30), and the second matching portion is arranged on the touch bracket (20). One of the first matching portion and the second matching portion is a second protrusion, and the other of the first matching portion and the second matching portion is a second recess. The second protrusion extends into the second recess and is in stop cooperation with the second recess to connect the PCB board (30) and the touch bracket (20); A fastener, the fastener passes through the PCB board (30) and the touch bracket (20), and the fastener is arranged at an interval from the matching component.

9. The lock according to claim 1, characterized in that, The lock further includes: A sealing structure (80), arranged between the touch bracket (20) and the front panel (10); wherein, the sealing structure (80) is made of at least one of rubber, silica gel and cotton pad.

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