A lock assembly

Abstract

This utility model discloses a lock accessory, including a sheet metal cover and a bottom latch cover plate formed from sheet metal. The bottom latch cover plate includes an end plate and a side plate connected to each other. The side plate is located on one side of the end plate. The surface of the end plate is provided with clearance holes and connecting holes and / or connectors. The connectors face the other side of the end plate. The sheet metal cover is used to cover the bottom latch cover plate, and the end plate of the bottom latch cover plate is located at the port of the sheet metal cover. The sheet metal cover includes an outer cover and an inner cover formed by sheet metal stamping. The inner cover is fitted inside the outer cover. The side plate of the bottom latch cover plate extends into the inner cover and is directly and / or indirectly fixedly engaged with the side wall of the inner cover. In this utility model lock accessory, the sheet metal cover is fixed to the door (or other lock mounting carrier) through the bottom latch cover plate. The end plate of the bottom latch cover plate abuts against the door, with a large contact area, preventing damage to the door. Moreover, during installation, the sheet metal cover can be separated from the bottom latch cover plate without obstructing the installation of the bottom latch cover plate, making installation more convenient.

Description

Technical Field

[0001] This utility model relates to the field of hardware accessories, and in particular to a lock accessory, such as a handle panel assembly and a lock cylinder panel assembly. Background Technology

[0002] Chinese Patent Publication No. CN205976741U, published on February 22, 2017, discloses a split lock, including a lock body, at least two fasteners, a handle assembly, and a lock cylinder assembly. The lock body is embedded in a door panel. The fasteners include fastening posts and screws. The end of the fastening post has an internally threaded hole along its axial direction. The fastening post passes through the lock body, and the screw can engage with the internally threaded hole. The handle assembly includes a handle, an outer handle retaining ring (handle outer cover), and an inner handle retaining ring (handle inner cover). The lock cylinder assembly includes an outer lock cylinder retaining ring (lock cylinder outer cover) and an inner lock cylinder retaining ring (lock cylinder inner cover). The retaining rings in this structure are generally machined from sheet metal, and their edges are relatively sharp. Taking handle installation as an example, during installation, the outer handle retaining ring needs to be moved towards the handle and separated from the inner handle retaining ring by a certain distance. Then, the screw is used to fix the inner handle retaining ring to the door body. Finally, the outer handle retaining ring is placed over the inner handle retaining ring.

[0003] In addition, the above structure has the following shortcomings:

[0004] 1. The diameter of the opening at the center of the outer retaining ring of the handle needs to be larger than the diameter at the base of the handle so that the outer retaining ring can move towards the handle. In addition, the outer retaining ring of the handle needs to have sufficient distance from the inner retaining ring of the handle so that the connector and the tool for turning the connector can be inserted. Therefore, this imposes great limitations on the design of the handle and the outer retaining ring of the handle.

[0005] 2. In addition to the shortcomings of point 1 above, there is less space for tool operation. Furthermore, the connectors are generally distributed on the left and right sides of the end face of the inner retaining ring of the handle, but this position is blocked by the handle. The installer needs to press down the handle with one hand and use the tool to work with the connector with the other hand. Moreover, the handle is in a loose state before installation, and the front and back handles need to be aligned. All of these factors combined make the installation very difficult, time-consuming and labor-intensive.

[0006] 3. The inner retaining rings of the handle and the inner retaining rings of the lock cylinder are cap-shaped. After installation, their sharp cap edges will cause obvious indentations / damage to the door panel (especially wooden door panels).

[0007] 4. After the inner retaining ring of the handle is installed, the outer retaining ring of the handle needs to be re-aligned and fastened to the inner retaining ring. If the inner retaining ring is installed too tightly, it will not be easy to fasten to the outer retaining ring of the handle. However, if it is not installed tightly, the handle will be loose and affect its use. Moreover, if the inner retaining ring is installed too tightly, in addition to deeper indentations, tools will be required to pry it open after the connecting parts are removed during disassembly and reassembly, causing secondary damage to the door panel.

[0008] 5. The connection holes of the inner retaining ring of the handle are limited by the handle washer, positioning plate, spring and other parts on the base. Therefore, the center distance between the two connection holes is relatively large. In some cases where the distance between the two clearance holes on the lock body is small, it is not suitable for the connecting parts of the inner retaining ring of the handle to pass through. Therefore, the inner retaining ring of the handle can only be fixed to the door body by wood screws. At the same time, the lock body has no support and is prone to sagging, which affects the use.

[0009] 6. In addition, some lock manufacturers, in order to save costs, only provide one handle retaining ring or lock cylinder retaining ring on the inner and outer sides of the corresponding door. The inner surface of the retaining ring on the outer (front) side of the door has a threaded sleeve, and the surface of the retaining ring on the inner (rear) side of the door has a connecting hole. A long screw is passed through the connecting hole and connected to the threaded sleeve to achieve the pull-and-fixture of the front and rear retaining rings. The inner screw head of this structure is exposed, which affects the aesthetics. At the same time, the connecting holes are distributed on the left and right, and one of the screw holes is still blocked by the handle. During installation, the handle must be pressed down to avoid the connecting hole before installation can be performed, which is also troublesome. Utility Model Content

[0010] The purpose of this utility model is to provide a lock accessory that has a reasonable structure, is easy to assemble and disassemble, and reduces damage to the door.

[0011] The purpose of this utility model is achieved as follows:

[0012] A lock fitting includes a sheet metal cover and a bottom latch cover formed from sheet metal. The bottom latch cover includes an end plate and a side plate connected to each other. The side plate is located on one side of the end plate. The surface of the end plate is provided with clearance holes and connecting holes and / or connectors. The connectors face the other side of the end plate. The sheet metal cover is used to cover the bottom latch cover, and the end plate of the bottom latch cover is located at the port of the sheet metal cover. The sheet metal cover is a double-layer cover, including an outer cover and an inner cover formed by sheet metal stamping. The inner cover is fitted inside the outer cover. The side plate of the bottom latch cover extends into the inner cover and is directly and / or indirectly fixedly engaged with the side wall of the inner cover.

[0013] The objective of this utility model can also be achieved by the following technical measures:

[0014] As a more specific solution, the direct fixing fit is a snap-fit ​​fit, and the indirect fixing fit is a tightening and fixing fit through a nut screw; the side wall of the inner cover is provided with a snap position and a screw hole, and the outer cover is provided with an opening corresponding to the screw hole; the side plate of the bottom cover plate is provided with a protruding buckle and a top abutment respectively corresponding to the snap position and the screw hole, the nut screw is threaded to the screw hole, the inner end of the nut screw is tightened to the top abutment, and the protruding buckle is snapped to the snap position.

[0015] The screw hole is a flanged screw hole, and the side plate of the bottom cover plate is recessed from the outside to the inside to form the top abutment; the bottom cover plate is formed by sheet metal processing, and its side plate is set on the periphery of the end plate.

[0016] The sheet metal cover is provided in two sets, namely a front cover and a rear cover. The front cover and rear cover are respectively equipped with a front bottom latch plate and a rear bottom latch plate, which are connected by a fastener. Alternatively, the front bottom latch plate and the rear bottom latch plate are each connected to the mounting carrier by another fastener. Alternatively, the rear cover is equipped with a bottom latch plate, which is connected to the inner end of the front cover by a fastener.

[0017] As a further embodiment, the sheet metal cover is provided with a handle at its outer end, and the handle is rotatably connected to the sheet metal cover via a reset rotation assembly.

[0018] As a further embodiment, the reset rotation assembly includes a rotor, a reset torsion spring, a washer, and a retaining ring; both the outer cover and the inner cover are provided with through holes, the rotor is rotatably engaged with the through holes, the outer end of the rotor is connected to the handle, the inner end face of the inner cover is provided with a stop portion, the reset torsion spring, the washer, and the retaining ring are disposed outside the inner end of the rotor, the washer is drivenly connected to the rotor and is provided with a lever arm, the reset torsion spring is provided with locking feet on opposite sides, the two locking feet respectively abut against the stop portion and the lever arm, the retaining ring is engaged with the outer periphery of the rotor, and the reset torsion spring and the washer are restricted between the retaining ring and the inner end face of the inner cover. Alternatively, the reset rotation assembly includes a rotor, a reset coil spring, a washer, and a retaining ring; both the outer cover and the inner cover are provided with through holes, the rotor is rotatably engaged with the through holes, the outer end of the rotor is connected to the handle, the inner end face of the inner cover is provided with a stop portion, the reset coil spring, the washer, and the retaining ring are disposed outside the inner end of the rotor, the washer is connected to the rotor in a driving connection, the center and outer periphery of the reset coil spring are respectively provided with retaining feet, the two retaining feet respectively abut against the stop portion and the rotor, the retaining ring is engaged with the outer periphery of the rotor, and the reset coil spring and the washer are restricted between the retaining ring and the inner end face of the inner cover.

[0019] As a further option, the handle is equipped with a lock cylinder, knob, or button, thus forming a handle for a handle lock or a three-bar lock.

[0020] As a further embodiment, a lock cylinder is provided between the front cover and the rear cover, and the through holes of the front cover and the rear cover respectively abut against the front and rear ends of the lock cylinder.

[0021] As a further embodiment, the inner end face of the inner cover is provided with a baffle corresponding to the inner end of the flanged screw hole, and when the bottom buckle cover plate is engaged with the inner cover, the top abutment of the bottom buckle cover plate is located between the flanged screw hole and the baffle.

[0022] As a further solution, the rear bottom cover plate is provided with the connecting hole, and the outer end of the rear bottom cover plate corresponding to the connecting hole is provided with a guide sleeve.

[0023] The beneficial effects of this utility model are as follows:

[0024] (1) In the lock fitting of this utility model, the sheet metal cover is fixed to the door body (or other lock installation carrier) by the bottom buckle cover plate. The end plate of the bottom buckle cover plate abuts against the door body, with a large contact area, so as not to damage the door body. Moreover, during installation, the sheet metal cover can be separated from the bottom buckle cover plate, which does not cause obstacles to the installation of the bottom buckle cover plate, making the installation more convenient.

[0025] (2) The lock fitting of this utility model can be used with the handle. The handle is connected to the sheet metal cover through the reset rotation component (whether it is a single-layer cover or a double-layer cover). When installing the handle, the handle does not need to be separated from the sheet metal cover. After the installer installs the bottom buckle cover on both sides of the door, the handle is installed and the sheet metal cover covers the bottom buckle cover and is directly and / or indirectly fixed to the side plate of the bottom buckle cover. The installation is completed. The handle does not need to be pressed down during the installation process, and the installation is quick and convenient.

[0026] (3) The sheet metal cover of the lock fitting of this utility model can also be used as a sheet metal cover for the lock cylinder of a split lock by changing the shape of its through hole.

[0027] (4) In the lock fittings of this utility model, the sheet metal cover is generally divided into two sets, front and back. The two sets of sheet metal covers are installed on the outer and inner sides of the door respectively. The two sets of sheet metal covers are equipped with bottom buckle covers. The two sets of bottom buckle covers can be connected by pull or connected to the door by wood screws respectively; or, the inner side is equipped with a bottom buckle cover, and the outer side does not need to be equipped. A screw sleeve is directly set on the inner end face of the sheet metal cover. The inner bottom buckle cover is connected to the screw sleeve by screws, thereby fixing the sheet metal cover (and other accessories on the cover, such as handles) on the outside of the door. Finally, the inner cover is installed on the inner side of the door and fixed with the inner bottom buckle cover, thus completing the installation of the corresponding front and back sets of covers (and other accessories on the cover).

[0028] (5) The bottom cover plate of this utility model is separate from the reset and rotation assembly of the handle. Therefore, the position of the connecting hole or connector on the bottom cover plate is more flexible. The connecting hole or connector can be closer to the center of the bottom cover plate to suit more lock body needs. In particular, some lock bodies have anti-fall holes that pass through both sides of them. When the anti-fall holes are close to the pin position on the lock body, the connector of the bottom cover plate in this structure can meet the anti-fall hole requirements of the lock body. The connector can pass through the anti-fall hole while connecting with the bottom cover plate, thus reinforcing the lock body. Attached Figure Description

[0029] Figure 1 This is an exploded structural diagram of the connection between the lock fitting and the door panel in the first embodiment of this utility model.

[0030] Figure 2 This is a schematic diagram of another embodiment of the bottom cover plate of the lock fitting in the first embodiment of this utility model.

[0031] Figure 3 This is an exploded view of the lock fitting in the first embodiment of the present invention from another angle.

[0032] Figure 4 This is an exploded view of the lock fittings and handle in the first embodiment of this utility model.

[0033] Figure 5 This is a schematic diagram showing the disassembled structure of the front and rear sets of lock fittings and handles in the first embodiment of this utility model.

[0034] Figure 6 for Figure 5 Schematic diagram of the main structure after assembly.

[0035] Figure 7 for Figure 6 Schematic diagram of the DD cross-sectional structure.

[0036] Figure 8 for Figure 7 Enlarged structural diagram of the two assembly states at point E.

[0037] Figure 9 This is a cross-sectional structural diagram of another embodiment of the first embodiment of the present invention, showing the cooperation between the front and rear sets of lock accessories and the handle.

[0038] Figure 10 for Figure 9 Schematic diagram of the dissected structure before cutting.

[0039] Figure 11 This is an exploded structural diagram of another embodiment of the first embodiment of the present invention.

[0040] Figure 12 for Figure 11 Another structural diagram from a different angle.

[0041] Figure 13 This is a schematic diagram of another embodiment of the first embodiment of the present invention after being fitted with the handle.

[0042] Figure 14 for Figure 13 Another structural diagram from a different angle.

[0043] Figure 15 for Figure 14 An exploded view of the connection between the bottom cover plate of the front cover and the inner cover of the rear cover.

[0044] Figure 16 for Figure 14 A schematic diagram of the connection structure of the central reset rotating assembly, handle, inner cover, and outer cover.

[0045] Figure 17This is an exploded view of the lock fitting in the second embodiment of this utility model.

[0046] Figure 18 This is a schematic diagram of the connection structure between the lock fitting and the back cover in the second embodiment of this utility model.

[0047] Figure 19 for Figure 18 Another structural diagram from a different angle.

[0048] Figure 20 This is an exploded structural diagram of one embodiment of the present invention, in which the bottom cover plate is modified to a three-point positioning system.

[0049] Figure 21 for Figure 22 Schematic diagram of the assembled structure.

[0050] Figure 22 for Figure 21 Schematic diagram of the cross-sectional structure of GG.

[0051] In the diagram: 1 is the bottom cover plate, 11 is the end plate, 12 is the side plate, 13 is the protruding buckle, 14 is the top abutment, 141 is the positioning hole, 15 is the clearance hole, 16 is the connecting hole, 161 is the guide sleeve, 17 is the connector, 18 is the threaded sleeve, 181 is the screw head, and 19 is the bolt.

[0052] A is the front bottom cover plate, B is the rear bottom cover plate, A1 is the front handle, B1 is the rear handle, A2 is the front lock cylinder cover, B2 is the rear lock cylinder cover, C is the sheet metal cover, G is the handle outer shell, and H is the inner shell.

[0053] 2 is the top screw of the machine;

[0054] 3 is the handle, 31 is the through hole, and 32 is the locking screw;

[0055] 4 is the reset rotating assembly, 41 is the rotor, 42 is the drive shaft, 43 is the snap ring, 44 is the washer, 441 is the pawl, 442 is the lever arm, and 45 is the reset torsion spring.

[0056] 6 is the outer cover, 61 is the opening, and 7 is the inner cover;

[0057] 100 represents the door panel. Detailed Implementation

[0058] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0059] Example 1, see Figure 1 and Figure 3As shown, a lock accessory includes a sheet metal cover C and a bottom latch cover 1. The bottom latch cover 1 includes an end plate 11 and a side plate 12 connected to each other. The side plate 12 is located on one side of the end plate 11. The surface of the end plate 11 is provided with a clearance hole 15 and a connection hole 16. The sheet metal cover C is used to cover the bottom latch cover 1. The end plate 11 of the bottom latch cover 1 is located at the port of the sheet metal cover C. The side plate 12 of the bottom latch cover 1 extends into the sheet metal cover C and is directly and indirectly fixedly engaged with the sheet metal cover C. When the bottom latch cover 1 is installed, its end plate 11 abuts against the door panel 100 to increase the contact area with the door panel 100, reduce pressure, and avoid damaging the door panel 100.

[0060] The sheet metal cover C is a double-layer cover, comprising an outer cover 6 and an inner cover 7 formed by sheet metal stamping. The inner cover 7 is fitted inside the outer cover 6 (in this embodiment, the outer cover 6 and the inner cover 7 are fixed together by an interference fit). The side plate 12 of the bottom cover plate 1 is directly and indirectly fixedly fitted to the side wall of the inner cover 7. The direct fixing fit is a snap-fit ​​fit, and the indirect fixing fit is a tightening fit using a set screw 2.

[0061] The inner cover 7 has a buckle 102 and a screw hole 103 on opposite sides, and the outer cover 6 has an opening 61 corresponding to the screw hole 103; the side plate 12 of the bottom buckle cover plate 1 has a protruding buckle 13 and a top abutment 14 corresponding to the buckle 102 and the screw hole 103, the machine top screw 2 is threaded to the screw hole 103, the inner end of the machine top screw 2 is tightened to the top abutment 14, and the protruding buckle 13 is fastened to the buckle 102.

[0062] The screw hole 103 is a flanged screw hole, and the side plate 12 of the bottom cover plate 1 is recessed from the outside to the inside to form the top abutment 14; the bottom cover plate 1 is formed by sheet metal processing, and its side plate 12 is set on the periphery of the end plate 11. The surface of the top abutment 14 is also provided with a positioning hole 141 corresponding to the tip of the machine screw 2. The tip of the machine screw 2 enters the positioning hole 141 to prevent the inner cover 7 from slipping on the bottom cover plate 1.

[0063] Combination Figure 4 As shown, the outer end of the sheet metal cover C is provided with a handle 3, and the handle 3 is rotatably connected to the sheet metal cover C through a reset rotation assembly 4.

[0064] The reset rotation assembly includes a rotor 41, a reset torsion spring 45, a washer 44, and a retaining ring 43. Both the outer cover 6 and the inner cover 7 have through holes 101 facing each other. The rotor 41 rotates with the through holes 101, and its outer end is connected to the handle 3. The inner end face of the inner cover 7 has a stop portion 105. The reset torsion spring 45, washer 44, and retaining ring 43 are disposed outside the inner end of the rotor 41. The washer 44 is drive-connected to the rotor 41 and has a lever 442. The reset torsion spring 45 has a retaining foot that abuts against the stop portion 105 and the lever 442. The retaining ring 43 engages with the outer periphery of the rotor 41. The reset torsion spring 45 and washer 44 are confined between the retaining ring 43 and the inner end face of the inner cover 7. The rotor 41 has a drive hole with slots on both sides. The washer 44 has a central hole with a claw 441 inside, which engages with the slots on the rotor 41 to achieve transmission. The transmission hole is a square hole, used for insertion and transmission with square shaft 42 (transmission shaft).

[0065] The rotor 41 has a threaded hole on the lower side of its outer end, and the handle 3 has a sleeve hole at its root. The sleeve hole is fitted onto the outside of the rotor 41. The handle 3 has a through hole 31 on the lower side of the sleeve hole, and a locking screw 32 is provided in the through hole 31 to connect with the threaded hole of the rotor 41.

[0066] The inner end face of the inner cover 7 is provided with a baffle 104 corresponding to the inner end of the flanged screw hole. When the bottom cover plate 1 is engaged with the inner cover 7, the top abutment 14 of the bottom cover plate 1 is located between the flanged screw hole and the baffle 104. The nut screw 2 is a small part that is easy to lose. During transportation, the nut screw 2 can be connected to the screw hole 103 and abut against the baffle 104 to prevent it from loosening.

[0067] The aforementioned bottom cover plate 1 can be designed as follows: Figure 2 As shown, its connecting hole can be replaced with connector 17.

[0068] Combination Figures 5 to 7 As shown, the sheet metal cover is provided in two sets, namely the front cover and the rear cover. During installation, the front cover and the rear cover are located on the front and rear sides of the door panel, respectively.

[0069] The front cover and the rear cover are respectively equipped with a front bottom latch plate A and a rear bottom latch plate B. The front bottom latch plate A and the rear bottom latch plate B are connected by a fastener, or the front bottom latch plate A and the rear bottom latch plate B are respectively connected to the mounting carrier (door panel) by another fastener (such as wood screws); in this embodiment, the front bottom latch plate A and the rear bottom latch plate B are connected by a fastener.

[0070] The fasteners include the connector 17, the threaded sleeve 18, and the bolt 19. The connector 17 is a screw rod set on the outer end face of the end plate 11 of the front bottom cover plate A, and one end of the threaded sleeve 18 is connected to the screw rod. The end plate 11 of the rear bottom cover plate B is provided with a connecting hole 16. The bolt 19 passes through the connecting hole 16 and is connected to the threaded sleeve 18, thereby tightening the front bottom cover plate A and the rear bottom cover plate B.

[0071] Combination Figure 8 As shown, the left side shows the state after the bottom cover plate 1 is installed into the inner cover 7, but not yet fixed. At this time, the protrusion 13 of the bottom cover plate 1 cannot cooperate with the buckle 102 of the inner cover 7, and the nut screw 2 has not yet tightened the top abutment 14. When the nut screw 2 contacts the top abutment 14, continue to tighten the nut screw 2. The cover body (inner cover 7 and outer cover 6) and the handle move slightly downward relative to the bottom cover plate 1 in the direction of arrow E, so that the buckle 102 of the inner cover 7 engages with the protrusion 13, the nut screw 2 tightens the top abutment 14, and the tip of the nut screw 2 enters the positioning hole 141 of the top abutment 14, thus fixing the cover body and the bottom cover plate 1 and completing the installation of the handle assembly.

[0072] As a further option, combined with Figure 9 and Figure 10 As shown, the rear bottom cover plate B is provided with the connecting hole 16, and the outer end of the rear bottom cover plate B corresponding to the connecting hole 16 is provided with a guide sleeve 161. The guide sleeve 161 can more easily be fitted and positioned with the threaded sleeve 18. At the same time, when the bolt 19 is inserted into the connecting hole 16 of the rear bottom cover plate B, it can be more easily aligned with the threaded sleeve 18 with the help of the guide sleeve 161.

[0073] For another further implementation, see Figure 11 and Figure 12 As shown, the abutment portion 105 of the inner cover 7 is cylindrical and has a threaded hole 1051. The abutment portion 105 is riveted or welded to the inner cover 7.

[0074] See Figures 13 to 15 As shown, the sheet metal cover is provided in two sets, namely a front cover and a rear cover. During installation, the front cover and the rear cover are located on the front and rear sides of the door panel, respectively. The front and rear covers are respectively provided with a front handle B1 and a rear handle A1.

[0075] The front cover does not have a bottom cover plate; only the rear cover has a bottom cover plate 1. The bottom cover plate 1 and the inner cover 7 of the front cover are connected by a connecting component.

[0076] The connecting components include a threaded sleeve 18 and a bolt 19. One end of the threaded sleeve 18 is provided with a screw head 181 that connects to the threaded hole 1051 of the inner cover 7 in the front cover body.

[0077] The bottom cover plate 1 of the rear cover body is provided with a connecting hole 16 on the end plate 11. The bolt 19 passes through the connecting hole 16 and connects with the threaded sleeve 18 to achieve the tightening of the rear bottom cover plate and the front cover body.

[0078] Example 3 differs from Example 2 in that: see [link to example 2] Figures 17 to 19 As shown, the through hole 101 on the sheet metal cover C is a lock cylinder matching hole. Taking a split lock as an example, it includes a handle assembly as shown in Figure 16 and a lock cylinder assembly in this embodiment. The lock cylinder assembly includes two sets of covers, a lock cylinder (not shown in the figure), and a bottom buckle cover plate 1. The rear lock cylinder cover A2 and the front lock cylinder cover B2 are located inside the rear lock cylinder cover A2. The through holes 101 of the front lock cylinder cover B2 and the rear lock cylinder cover A2 respectively abut against the front and rear ends of the lock cylinder.

[0079] The bottom cover plate 1 and the inner cover 7 of the front locking pin cover are connected by a connecting assembly.

[0080] The connecting components include a threaded sleeve 18 and a bolt 19. One end of the threaded sleeve 18 is provided with a screw head that connects to the threaded hole of the abutment part 105 of the inner cover 7 in the front lock cylinder cover.

[0081] The bottom cover plate 1 of the rear lock cylinder cover is provided with a connecting hole 16 on its end plate 11. The bolt 19 passes through the connecting hole 16 and connects with the threaded sleeve 18 to achieve the tightening of the rear bottom cover plate and the front lock cylinder cover.

[0082] As a further option, refer to Figures 20 to 22 As shown, in the above embodiment, there are two (or more) buckle positions 102 and one screw hole 103. The two buckle positions 102 and the screw hole 103 are arranged in a triangular pattern. The protruding buckle 13 and the top abutment 14 on the bottom buckle cover plate 1 correspond to the buckle positions 102 and the screw hole 103, respectively. The cover body and the bottom buckle cover plate 1 are positioned by three points (see...). Figure 22 The three positioning points (F1, F2, and F3) are more stable.

[0083] In the above embodiments, the sheet metal of the outer cover 6 is mainly stainless steel, but not limited to stainless steel; it can also be made of other materials, such as copper, iron, aluminum alloy, etc. The sheet metal of the inner cover 7 and the bottom cover plate 1 is mainly iron, but not limited to iron; it can also be made of other materials, such as stainless steel, copper, aluminum alloy, zinc alloy, etc. In the above embodiments, it is preferable that the outer cover 6 is made of stainless steel sheet metal by stamping, and the inner cover 7 and the bottom cover plate 1 are made of iron sheet metal by stamping. This ensures the appearance, texture, and performance while significantly reducing costs. Furthermore, the optimization of the above structure makes installation more convenient and greatly reduces damage to the door panel.

[0084] The above describes the preferred embodiments of this utility model, illustrating and describing its basic principles, main features, and advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made without departing from the spirit and scope of this utility model, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A lock fitting comprising a sheet metal cover (C), characterized in that: It also includes a bottom cover plate (1) formed by sheet metal processing. The bottom cover plate (1) includes an end plate (11) and a side plate (12) connected to each other. The side plate (12) is located on one side of the end plate (11). The surface of the end plate (11) is provided with a clearance hole (15) and a connection hole (16) and / or a connector (17). The connector (17) faces the other side of the end plate (11). The sheet metal cover (C) is used to cover the bottom cover plate (1). The end plate (11) of the bottom cover plate (1) is located at the port of the sheet metal cover (C). The sheet metal cover (C) is a double-layer cover, which includes an outer cover (6) formed by sheet metal stamping and an inner cover (7). The inner cover (7) is fitted inside the outer cover (6). The side plate (12) of the bottom cover plate (1) extends into the inner cover (7) and is directly and / or indirectly fixed to the side wall of the inner cover (7).

2. The lockset of claim 1, wherein: The direct fixing fit is a snap-fit ​​fit, and the indirect fixing fit is a clamping and fixing fit through the machine top screw (2); The inner cover (7) has a snap-fit ​​(102) and a screw hole (103) on its side wall, and the outer cover (6) has an opening (61) corresponding to the screw hole (103). The side plate (12) of the bottom cover plate (1) is provided with a protruding buckle (13) and a top abutment (14) respectively corresponding to the buckle position (102) and the screw hole (103). The machine top screw (2) is threadedly connected to the screw hole (103), and the inner end of the machine top screw (2) is pressed against the top abutment (14). The protruding buckle (13) is fastened to the buckle position (102).

3. The lockset of claim 2, wherein: The screw hole (103) is a flanged screw hole, and the side plate (12) of the bottom cover plate (1) is recessed from the outside to the inside to form the top abutment (14); the bottom cover plate (1) is formed by sheet metal processing, and its side plate (12) is set on the periphery of the end plate (11).

4. The lockset of any of claims 1-3, wherein: The sheet metal cover (C) is provided in two sets, namely the front cover and the rear cover; The front cover and the rear cover are respectively equipped with a front bottom cover plate (A) and a rear bottom cover plate (B). The front bottom cover plate (A) and the rear bottom cover plate (B) are connected by a fastener, or the front bottom cover plate (A) and the rear bottom cover plate (B) are respectively connected to the mounting carrier by another fastener. Alternatively, the rear cover is equipped with a bottom buckle cover (1), which is pulled to the inner end of the front cover.

5. The lockset of claim 2, wherein: The outer end of the sheet metal cover (C) is provided with a handle (3), which is rotatably connected to the sheet metal cover (C) through a reset rotation assembly.

6. The lockset of claim 5, wherein: The reset rotation assembly includes a rotor (41), a reset torsion spring (45), a washer (44), and a retaining ring (43); the outer cover (6) and the inner cover (7) are both provided with through holes (101), the rotor (41) is rotated and engaged with the through hole (101), the outer end of the rotor (41) is connected to the handle (3), the inner end face of the inner cover (7) is provided with a stop (105), the reset torsion spring (45), the washer (44), and the retaining ring (43) are provided outside the inner end of the rotor (41), the washer (44) is connected to the rotor (41) and is provided with a lever (442), the reset torsion spring (45) is provided with locking feet on opposite sides, the two locking feet are respectively in contact with the stop (105) and the lever (442), the retaining ring (43) is engaged with the outer periphery of the rotor (41), and the reset torsion spring (45) and the washer (44) are restricted between the retaining ring (43) and the inner end face of the inner cover (7); Alternatively, the reset rotation assembly includes a rotor (41), a reset coil spring (45'), a washer (44), and a retaining ring (43); the outer cover (6) and the inner cover (7) are both provided with through holes (101), the rotor (41) is rotatably engaged with the through hole (101), the outer end of the rotor (41) is connected to the handle (3), the inner end face of the inner cover (7) is provided with a stop (105), the reset coil spring (45'), the washer (44), and the retaining ring (43) are provided outside the inner end of the rotor (41), the washer (44) is connected to the rotor (41) in a driving connection, the center and outer periphery of the reset coil spring (45') are respectively provided with retaining feet, the two retaining feet respectively abut against the stop (105) and the rotor (41), the retaining ring (43) is engaged with the outer periphery of the rotor (41), and the reset coil spring (45') and the washer (44) are restricted between the retaining ring (43) and the inner end face of the inner cover (7).

7. The lock fitting according to claim 5 or 6, characterized in that: The handle (3) is equipped with a lock cylinder, a knob, or a button.

8. The lockset of claim 4, wherein: A lock cylinder is provided between the front cover and the rear cover, and the through holes (101) of the front cover and the rear cover abut against the front and rear ends of the lock cylinder, respectively.

9. The lockset of claim 3, wherein: The inner end face of the inner cover (7) is provided with a baffle (104) corresponding to the inner end of the flanged screw hole. When the bottom buckle cover (1) is engaged with the inner cover (7), the top abutment (14) of the bottom buckle cover (1) is located between the flanged screw hole and the baffle (104).

10. The lockset of claim 4, wherein: The rear bottom cover plate (B) is provided with the connecting hole (16), and the outer end of the rear bottom cover plate (B) corresponding to the connecting hole (16) is provided with a guide sleeve (161).

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