Flat unscrewing lock cylinder hole cover type hidden handle

Abstract

The utility model relates to the technical field of handles, and discloses a flat unscrewing lock cylinder hole cover type hidden handle which comprises a shell, a cover body and a magnetic attraction assembly, the shell is used for being installed in an installation groove of a door plate, the shell is provided with a lock cylinder hole, and the lock cylinder hole is used for installing a lock cylinder; the cover body is hinged to the shell through a connecting rod assembly and has a first state of covering the outer surface of the shell in the first direction and a second state of being partially staggered with the shell in the vertical direction and exposing the lock cylinder hole; the cover bodies in the first state and the second state are parallel to the shell; the cover body in the second state and the shell are arranged in a spaced mode in the first direction, and the magnetic attraction assembly generates magnetic attraction force enabling the cover body and the shell in the first state to be attracted to each other; and an elastic piece for applying a pre-torsion force for switching from the first state to the second state to the cover body is arranged at the hinged part of the connecting rod assembly and the shell. The lock hole is simple in structure and convenient to operate to expose the lock hole, and has the functions of self-bouncing when the cover is dug and resetting self-absorption positioning when the cover is pressed.

Description

Technical Field

[0001] This utility model relates to the field of handle technology, specifically to a concealed handle with a lock cylinder hole cover that opens horizontally. Background Technology

[0002] Currently, the market offers a wide variety of traditional handles, widely used in various industries such as entrance doors, interior doors, and cabinet doors. Most of these handles protrude from the mounting surface, taking up considerable space and posing a risk of bumping into people. A few handles utilize a folding structure, reducing their size when folded, but this compromises their aesthetics. With the widespread adoption of fully automatic electronic smart locks, especially in scenarios equipped with these locks or door openers, the need for mechanical keys or handles for unlocking or opening doors has significantly decreased, becoming only occasionally or in emergency situations. This has led to a growing market demand for flattened, concealed, or hidden handles.

[0003] Previously, there have been sporadic patent applications and applications for concealed handles, such as "A Buffer Concealed Handle (Patent Application No. CN201821907056.5)" and "A Concealed Handle and Bathroom Cabinet (Patent Application No. CN202021961368.1)". However, these are mainly used for cabinet doors and have overly rudimentary structures, failing to meet the requirements of various entrance doors, interior doors, and other door manufacturing industries. Another example is the "Concealed Handle (Patent Application No. CN202020796679.0)", where the handle panel is flush with the door leaf. However, the handle panel is fixed and cannot move. There is a large gap between the main side of the handle panel and the door leaf, creating a large pitted effect in appearance. It also cannot meet the structural and functional requirements of mechanical lock cylinders for emergency unlocking with a key. In other words, the structure is rigid and rudimentary, the appearance is poor, the functions are incomplete, and the applicability is narrow. Utility Model Content

[0004] In view of this, the present invention provides a concealed handle with a lock cylinder hole cover that can be opened by a flat rotation. It has a simple structure, is easy to operate, exposes the lock hole, and has the functions of self-springing when the cover is pried open and self-locking when the cover is pressed.

[0005] This utility model provides a concealed handle with a lock cylinder hole cover that opens horizontally, including:

[0006] A housing for installation in a mounting groove in a door panel, the housing having a lock cylinder hole for installing a lock cylinder;

[0007] The cover is hinged to the housing via a linkage assembly. The cover has a first state covering the outer surface of the housing along a first direction, and a second state partially offset from the housing along a vertical direction and exposing the lock cylinder hole. The cover in both the first and second states is arranged parallel to the housing. The cover in the second state is spaced apart from the housing along the first direction.

[0008] The concealed handle with a lock cylinder hole cover that opens horizontally according to this utility model has at least the following beneficial effects:

[0009] The cover is hinged to the housing via a linkage assembly, and the housing has a lock cylinder hole for installing the lock cylinder. When mechanical unlocking is required by inserting a key into the lock cylinder hole in the event of a power failure or circuit malfunction, simply pulling the cover causes it to simultaneously translate away from the housing in a first direction and in a vertical direction, allowing the cover to switch from the first state to the second state with only a short stroke. When it is necessary to cover the lock cylinder hole, simply pushing the cover causes it to move towards the housing in a first direction. While moving, the cover also moves vertically towards the housing, allowing it to switch from the second state to the first state with only a short stroke. This makes operation simpler and the structure more reliable. In the first state, the cover abuts against and covers the outer surface of the housing, resulting in a smaller thickness of the portion of the lock cylinder cover-type concealed handle protruding from the door panel, reducing the risk of bumping into people and eliminating the abruptness of traditional handles, thus enhancing its aesthetics.

[0010] In one optional embodiment, the linkage assembly includes a first linkage and a second linkage. The first linkage is located above the second linkage in the vertical direction. One end of the first linkage is hinged to the end of the housing opposite to the cover, and the other end is hinged to the cover. One end of the second linkage is hinged to the end of the housing opposite to the cover, and the other end is hinged to the cover. The housing has a movable groove formed through it in a first direction. The movable groove is parallel to the vertical direction, and both the first linkage and the second linkage are movably disposed in the movable groove.

[0011] In one optional embodiment, a magnetic attraction component is further included, which is disposed on the housing and the cover. When the cover is in a first state, the magnetic attraction component generates a magnetic attraction force that causes the cover and the housing to attract each other.

[0012] In one optional embodiment, the magnetic component includes a magnet and a magnetic metal element, with the magnet disposed on one of the cover and the housing, and the magnetic metal element disposed on the other; when the cover is in a first state, the magnet and the magnetic metal element attract each other.

[0013] In one alternative embodiment, there are two of each of the first and second links, with the two first links arranged opposite each other along a second direction.

[0014] In one optional embodiment, the end of the housing opposite to the cover is rotatably connected to a connecting shaft about a second direction, and the ends of the two first connecting rods opposite to the cover are respectively connected to the two sides of the connecting shaft along the second direction and rotate together with the connecting shaft.

[0015] In one alternative embodiment, an elastic element is provided at the hinge joint between the linkage assembly and the housing, the elastic element being used to apply a pre-torque force to the cover body to switch from a first state to a second state.

[0016] In one alternative embodiment, the elastic element is configured as a torsion spring, which is sleeved on the connecting shaft, with one end of the torsion spring connected to the housing and the torsion hook end of the torsion spring connected to the connecting shaft.

[0017] In one optional embodiment, the housing is provided with two U-shaped grooves at one end away from the cover along a first direction, the two U-shaped grooves are spaced apart along a second direction, and the connecting shaft is rotatably connected to the two U-shaped grooves on both sides along the second direction; the open end of the U-shaped groove is detachably covered with a shaft pressure plate.

[0018] In one optional embodiment, the housing is provided with a mounting threaded hole on each side of the U-shaped groove along the vertical direction, and the shaft pressure plate is provided with a mounting through hole corresponding to the mounting threaded hole. The mounting through hole is used for mounting screws to pass through, and the mounting screws are matched with the mounting threaded holes. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is an exploded structural diagram of an embodiment of the present utility model;

[0021] Figure 2 This is a schematic diagram of the cover in the first state in an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the cover in the second state in an embodiment of the present invention;

[0023] Figure 4 for Figure 3 Another structural diagram from another perspective;

[0024] Figure 5 This is a schematic diagram of the assembly structure of the connecting shaft, torsion spring and two upper connecting rods in an embodiment of this utility model;

[0025] Figure 6 for Figure 5 A schematic diagram of the assembly structure of the connecting shaft and the hook piece;

[0026] Figure 7 This is a schematic diagram of the structure of the cover in an embodiment of the present utility model;

[0027] Figure 8 This is a schematic diagram of the shell structure in an embodiment of the present utility model;

[0028] Figure 9 for Figure 8 A structural diagram from another perspective.

[0029] Explanation of reference numerals in the attached figures:

[0030] 100-Housing, 110-Lock core hole, 120-Modular groove, 121-Third threaded hole, 122-Third screw, 130-U-groove, 140-Shaft pressure plate, 141-Mounting through hole, 142-Mounting screw, 150-Mounting countersunk hole, 160-Mounting threaded hole, 170-Mounting hole;

[0031] 300-Cover body, 310-Connecting support, 311-Connecting groove, 312-First threaded hole, 313-First screw, 314-Second threaded hole, 315-Second screw, 320-Enclosure;

[0032] 410-First connecting rod, 411-First through hole, 412-Third through hole, 420-Second connecting rod, 421-Second through hole, 422-Fourth through hole, 430-Connecting shaft, 431-Polygonal cylinder, 432-First cylinder, 433-Second cylinder, 440-Torsion spring, 450-Hook piece, 451-Snap notch;

[0033] 510 - Magnet, 520 - Magnetic metal parts. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0035] In the description of this embodiment, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this embodiment. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of this embodiment, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment according to the specific circumstances.

[0037] The following is combined with Figures 1 to 9 The following describes embodiments of the present invention.

[0038] According to an embodiment of the present invention, a concealed handle with a lock cylinder hole cover that can be rotated open is provided, including a housing 100 and a cover 300. The housing 100 is used to install in a mounting groove in a door panel, and the housing 100 is provided with a lock cylinder hole 110 for installing a lock cylinder. The cover 300 is hinged to the housing 100 via a connecting rod assembly, and the cover 300 has a first state covering the outer surface of the housing 100 along a first direction (e.g., ...). Figure 2 As shown), and a second state in which the lock cylinder hole 110 is partially offset from the housing 100 in the vertical direction and exposed (as shown). Figure 3 and Figure 4 (As shown); the cover 300 in the first state and the second state are both arranged parallel to the housing 100; the cover 300 in the second state and the housing 100 are spaced apart along the first direction.

[0039] In this embodiment, the lock cylinder hole cover type concealed handle hinges the cover 300 to the housing 100 via a connecting rod assembly. The housing 100 has a lock cylinder hole 110 for installing the lock cylinder. When mechanical unlocking is required by inserting a key into the lock cylinder hole in the event of power failure or circuit malfunction, simply pulling the cover 300 causes it to simultaneously perform a translational movement away from the housing 100 in the first direction and a vertical translational movement away from the housing 100. This allows the cover 300 to switch from the first state to the second state with only a short movement stroke, exposing the lock cylinder hole and enabling key insertion into the mechanical lock cylinder. The structure and function requirements for emergency unlocking are as follows: When it is necessary to cover the lock cylinder's keyhole, simply push the cover 300 to move it. This allows the cover 300 to simultaneously move in the first direction towards the housing 100 and in the vertical direction towards the housing 100. Thus, the cover 300 only needs to make a short movement stroke to switch from the second state to the first state, covering the lock cylinder's keyhole. This meets the functional requirement of matching and covering the keyhole of the mechanical lock cylinder to prevent dust from entering. It achieves the goal of switching between the first and second states by only driving the cover 300 to make a short translational movement stroke, making operation simpler and the structure more reliable.

[0040] It should be noted that, in this embodiment, after the housing 100 is installed in the mounting groove of the door panel, the outer surface of the housing 100 protrudes from the surface of the door panel by less than two millimeters, and the cover 300 is relatively thin. In the first state, the cover 300 abuts against and covers the outer surface of the housing 100, so that the thickness of the part of the cover 300 and the housing 100 protruding from the surface of the door panel is small, making it less likely to bump into people, and without the abruptness of a traditional handle, making it more aesthetically pleasing; at the same time, the cover 300 in the first state has a surrounding wall 320 around the outer edge of the end face close to the housing 100. The surrounding wall 320 of the cover 300 in the first state covers the part of the outer surface of the housing 100 that protrudes from the surface of the door panel, ensuring that the cover 300 in the first state and the surface of the door panel are seamlessly joined and fused.

[0041] It should be noted that when the cover 300 is switched to the second state so that the lock cylinder hole 110 is exposed (that is, the lock cylinder hole is exposed), since the cover 300 and the housing 100 are spaced apart along the first direction, there is a gap between the cover 300 and the surface of the door panel along the first direction. Therefore, the user only needs to pull the cover 300 outward to open the door and realize the function of a door handle or door pull.

[0042] It should be noted that, compared to using a rotation method to vertically offset the cover 300 and the lock cylinder hole 110 to expose the lock cylinder hole 110, this embodiment uses a translational motion to vertically offset the cover 300 and the lock cylinder hole 110. This results in a shorter travel distance, simpler operation, and a more reliable structure.

[0043] It is understood that the vertical direction mentioned in the text refers to the height direction of the shell 100, the first direction refers to the thickness direction of the shell 100, and the second direction refers to the width direction of the shell 100. The first direction and the second direction are located on the same horizontal plane. For ease of description, this embodiment uses... Figure 1 The first direction, second direction, and vertical direction shown are used as descriptions of the first direction, second direction, and vertical direction, respectively, but should not be construed as making explicit limitations on the first direction, second direction, and vertical direction.

[0044] It is understandable that the lock cylinder is equipped with a traditional keyhole, and the lock cylinder is installed in the lock cylinder hole 110; therefore, when the cover 300 is switched to the first state, the lock cylinder hole 110 is covered, thus covering the lock cylinder hole; when the cover 300 is switched to the second state, the lock cylinder hole 110 is exposed, thus revealing the lock cylinder hole.

[0045] It should be noted that the outer surface of the housing 100 along the first direction mentioned in the text refers to the side facing the user when in use, that is, the side of the housing 100 facing the cover 300.

[0046] In practical applications, the door panel can be either a door leaf or a cabinet door. That is, the lock cylinder hole cover type concealed handle of this embodiment can be applied to various industries such as entrance doors, interior doors, and cabinet doors.

[0047] It should be noted that the lock cylinder hole 110 can be located either at the upper end or the lower end of the side wall of the housing 100. In this embodiment, the lock cylinder hole 110 is located at the lower end of the side wall of the housing 100. Therefore, when the cover 300 is switched from the first state to the second state, pulling the cover 300 causes the cover 300 to move away from the housing 100 along the first direction while simultaneously moving upward away from the housing 100 in the vertical direction. When the cover 300 is switched from the second state to the first state, pushing the cover 300 causes the cover 300 to move closer to the housing 100 along the first direction while simultaneously moving downward closer to the housing 100 in the vertical direction.

[0048] The structure of the linkage assembly in this embodiment will be described in detail below.

[0049] like Figure 1 , Figure 3 , Figure 4 , Figure 8 and Figure 9As shown, in some embodiments, the linkage assembly includes a first linkage 410 and a second linkage 420. The first linkage 410 is located above the second linkage 420 in the vertical direction. One end of the first linkage 410 is hinged to the end of the housing 100 away from the cover 300, and the other end is hinged to the cover 300. One end of the second linkage 420 is hinged to the end of the housing 100 away from the cover 300, and the other end is hinged to the cover 300. The housing 100 has a movable groove 120 formed through it in a first direction. The movable groove 120 is parallel to the vertical direction, and both the first linkage 410 and the second linkage 420 are movably disposed in the movable groove 120. By combining the housing 100, the first connecting rod 410, the cover 300, and the second connecting rod 420 to form a parallelogram linkage mechanism, and with the movable groove 120 providing clearance space for the first connecting rod 410 and the second connecting rod 420, when an external force is applied to the cover 300, the cover 300 can be driven to perform a translational movement away from the housing 100 along the first direction while simultaneously performing a translational movement upwards in the vertical direction away from the housing 100, or the cover 300 can be driven to perform a translational movement towards the housing 100 along the first direction while simultaneously performing a translational movement downwards in the vertical direction towards the housing 100. This allows the cover 300 to switch between the first and second states by rotating it out, thereby shortening the stroke required for the cover 300 to switch between the first and second states, and making the switching between the first and second states smoother and less strenuous.

[0050] like Figure 3 and Figure 7 As shown, specifically, the end face of the cover 300 facing the housing 100 along the first direction is provided with a connecting support 310. The end of the connecting support 310 opposite to the cover 300 has a vertically extending connecting groove 311. The first connecting rod 410 is hinged to the upper end of the connecting groove 311 along the vertical direction, and the second connecting rod 420 is hinged to the lower end of the connecting groove 311 along the vertical direction. By hinged to both the first connecting rod 410 and the second connecting rod 420 in the connecting groove 311, the connecting groove 311 can simultaneously guide the movement trajectories of both the first connecting rod 410 and the second connecting rod 420, which helps improve the smoothness and stability of the cover 300 switching between the first and second states.

[0051] like Figure 1 , Figure 3 , Figure 5 and Figure 7As shown, specifically, the first connecting rod 410 has a first through hole 411 formed at one end facing the cover 300 along the second direction. The connecting support 310 has a first threaded hole 312 formed along the second direction at the position corresponding to the first through hole 411. A first screw 313 is threaded into the first threaded hole 312. When the first connecting rod 410 is hinged and assembled to the cover 300, the first screw 313 is passed through the first through hole 411 and threaded into the first threaded hole 312 to complete the assembly. The operation is simple.

[0052] like Figure 1 , Figure 3 , Figure 5 and Figure 7 As shown, specifically, the end of the second connecting rod 420 facing the cover 300 has a second through hole 421 formed along the second direction. The connecting support 310 has a second threaded hole 314 formed along the second direction at the position corresponding to the second through hole 421. A second screw 315 is threaded into the second threaded hole 314. When the second connecting rod 420 is hinged and assembled to the cover 300, the second screw 315 is passed through the second through hole 421 and threaded into the second threaded hole 314 to complete the assembly. The operation is simple.

[0053] like Figure 1 and Figure 5 As shown, specifically, a third through hole 412 is formed at the end of the first connecting rod 410 facing the housing 100 along the second direction, and the third through hole 412 is interference-fitted with the connecting shaft 430.

[0054] like Figures 1 to 3 as well as Figure 8 As shown, specifically, the end of the second connecting rod 420 facing the housing 100 has a fourth through hole 422 formed along the second direction. The wall of the movable groove 120 has a third threaded hole 121 formed along the second direction corresponding to the position of the fourth through hole 422. A third screw 122 is threaded into the third threaded hole 121. When the second connecting rod 420 is hinged and assembled to the housing 100, the third screw 122 is passed through the fourth through hole 422 and threaded into the third threaded hole 121 to complete the assembly. The operation is simple.

[0055] like Figure 2 As shown, specifically, the housing 100 has a mounting countersunk hole 150 formed through it along the first direction. The mounting countersunk hole 150 is used for countersunk screws to pass through the pre-set threaded hole in the door panel, thereby fixing the housing 100 to the mounting groove of the door panel.

[0056] like Figure 3 and Figure 4As shown, specifically, there are two of each of the first connecting rod 410 and the second connecting rod 420, with the two first connecting rods 410 arranged opposite each other along the second direction. This arrangement forms a parallelogram linkage mechanism on both sides of the housing 100 and the cover 300 along the second direction, which helps to improve the smoothness and stability of the cover 300 switching between the first and second states, thereby improving the reliability of the lock cylinder hole cover type concealed handle of this embodiment.

[0057] like Figures 1 to 3 As shown, specifically, the end of the housing 100 facing away from the cover 300 is rotatably connected to a connecting shaft 430 about a second direction. The ends of the two first connecting rods 410 facing away from the cover 300 are respectively connected to the two sides of the connecting shaft 430 along the second direction and rotate together with the connecting shaft 430. Connecting the two first connecting rods 410 through the connecting shaft 430 helps to improve the synchronization of the rotation of the two first connecting rods 410 relative to the housing 100 when an external force is applied to the cover 300; and compared to hinged to the housing 100 through two hinge shafts, the structure of this embodiment is simpler and easier to assemble.

[0058] like Figures 1 to 3 as well as Figure 8 As shown, specifically, the housing 100 has two U-shaped grooves 130 at one end opposite to the cover 300 along a first direction. The two U-shaped grooves 130 are spaced apart along a second direction. The connecting shaft 430 is rotatably connected to the two U-shaped grooves 130 on both sides along the second direction. The open end of the U-shaped groove 130 is detachably covered by a shaft clamping plate 140. By detachably covering the open end of the U-shaped groove 130 with the shaft clamping plate 140, on the one hand, the shaft clamping plate 140 can restrict the degree of freedom of the connecting shaft 430 to move radially out of the U-shaped groove 130, thereby improving the reliability of the connecting shaft 430 rotating along the second direction within the U-shaped groove 130; on the other hand, during assembly, the open end of the U-shaped groove 130 can be opened first to allow the connecting shaft 430 to be placed into the U-shaped groove 130, and then the shaft clamping plate 140 can be connected and covered to cover the open end of the U-shaped groove 130, making the entire assembly process convenient.

[0059] The detachable connection between the shaft pressure plate 140 and the housing 100 is described in detail here. In some embodiments, such as... Figure 1 , Figure 2 and Figure 8As shown, the housing 100 has a mounting threaded hole 160 on each side of the U-shaped groove 130 along the vertical direction. The shaft pressure plate 140 has a mounting through hole 141 corresponding to the mounting threaded hole 160. The mounting through hole 141 is used for mounting screws 142 to pass through, and the mounting screws 142 are matched with the mounting threaded hole 160. When it is necessary to assemble the shaft pressure plate 140 and the housing 100 into one piece to cover the open end of the U-shaped groove 130, it is only necessary to select two mounting screws 142 to pass through the corresponding mounting through hole 141 and tighten them into the corresponding mounting threaded hole 160. The operation is simple. In another alternative embodiment, the housing 100 is provided with a mounting through hole 141 on each side of the U-shaped groove 130 along the vertical direction. The mounting through hole 141 is used for mounting screws 142 to pass through. The shaft pressure plate 140 is provided with a mounting threaded hole 160 corresponding to the position of the mounting through hole 141. The mounting screw 142 is matched with the mounting threaded hole 160.

[0060] In some embodiments, the lock cylinder cover type concealed handle further includes a magnetic attraction component disposed on the housing 100 and the cover 300. When the cover 300 is in a first state, the magnetic attraction component generates a magnetic attraction force that causes the cover 300 and the housing 100 to attract each other. The magnetic attraction force generated by the magnetic attraction component makes the cover 300 and the housing 100 in the first state more tightly attracted, and under normal conditions where no external force is applied to drive the cover 300 to switch from the first state to the second state, the cover 300 always remains tightly covering and attached to the outer surface of the housing 100.

[0061] Specifically, the magnetic attraction assembly includes a magnet 510 and a magnetic metal component 520. The magnet 510 is disposed on one of the cover 300 and the housing 100, and the magnetic metal component 520 is disposed on the other. Figures 1 to 4 As shown, preferably, the magnet 510 is disposed on the outer surface of the housing 100, and the magnetic metal part 520 is disposed on the end face of the cover plate facing the housing 100. When the cover 300 is in the first state, the magnet 510 and the magnetic metal part 520 abut against each other and generate magnetic attraction, so that the cover 300 always remains tightly covered and attached to the outer surface of the housing 100 under the natural state of the cover 300 without the application of an external force to drive the cover 300 to switch from the first state to the second state. At the same time, during the process of switching the cover 300 from the second state to the first state, as the magnet 510 and the magnetic metal part 520 approach each other and generate magnetic attraction, and under the self-attracting positioning effect between the magnet 510 and the magnetic metal part 520, it is beneficial for the cover 300 to accurately switch to the first state and completely cover the outer surface of the housing 100, realizing the function of self-attracting positioning when pressing the cover to reset.

[0062] In order to improve the tight covering effect between the cover 300 and the housing 100 in the first state, specifically, two magnets 510 and two magnetic metal parts 520 are provided, and the two magnetic metal parts 520 are arranged vertically opposite each other on the end face of the cover 300 facing the housing 100.

[0063] like Figure 8 and Figure 9 As shown, specifically, the outer surface of the housing 100 is recessed with a mounting hole 170 corresponding to the position of the magnet 510, and the magnet 510 is embedded in the mounting hole 170.

[0064] Specifically, the magnetic metal part 520 is connected to the cover 300 by screws for assembly.

[0065] In specific applications, the magnetic metal part 520 is one of the ferromagnetic materials such as iron, cobalt, and nickel.

[0066] In some embodiments, an elastic element is provided at the hinge joint between the linkage assembly and the housing 100. This elastic element applies a pre-torque force to the cover 300 to switch it from a first state to a second state. By adding the elastic element, and ensuring that the pre-torque force generated by the elastic element partially cancels out the magnetic force generated by the magnetic assembly, only a small external force is needed to gradually separate the cover 300 from the housing 100 and precisely switch it to the second state during the process of switching the cover 300 from the first state to the second state. This achieves the self-opening function of the cover, making operation more convenient. Furthermore, because the elastic element always applies a biasing force to the cover 300 in the second state, the cover 300 in the second state cannot automatically switch to the first state in its natural state without external force, thus preventing injury to the operator's hands.

[0067] Understandably, when the cover 300 is in the first state, the pre-torsion force generated by the elastic element cannot enable the cover 300 to overcome the magnetic attraction force generated by the magnetic attraction component and automatically switch to the second state.

[0068] like Figures 1 to 5 As shown, specifically, the elastic element is a torsion spring 440, which is sleeved on the connecting shaft 430. One end of the torsion spring 440 has a torque arm connected to the housing 100, and the torsion hook end of the torsion spring 440 is connected to the connecting shaft 430. The torque arm of the torsion spring 440 is connected to the housing 100, and the torsion hook end of the torsion spring 440 is connected to the connecting shaft 430, causing the torsion spring 440 to be stretched or compressed as the connecting shaft 430 rotates. This allows the energy stored in the torsion spring 440 to reach its maximum when the cover 300 switches to the first state, so that a small external force can be applied to separate the magnetic metal part 520 from the magnet 510, thereby releasing the energy stored in the torsion spring 440 and allowing the cover 300 to automatically and accurately switch to the second state.

[0069] To improve the ease of assembly of the torsion spring 440, such as Figure 1 , Figure 5 and Figure 6 As shown, specifically, the connecting shaft 430 includes a polygonal column 431 and two first cylinders 432 coaxially disposed at both ends of the polygonal column 431 along the second direction. The first cylinders 432 are rotatably connected to the U-shaped groove 130. The cross-sectional area of ​​the polygonal column 431 perpendicular to the second direction is larger than the cross-sectional area of ​​the first cylinders 432 perpendicular to the second direction. The polygonal column 431 is interference-fitted with a hook piece 450. The outer peripheral surface of the hook piece 450 is recessed with a snap-fit ​​notch 451. The torsion hook end of the torsion spring 440 is engaged with the snap-fit ​​notch 451.

[0070] Specifically, each first cylinder 432 has a second cylinder 433 at one end away from the polygonal cylinder 431. The diameter of the second cylinder 433 is smaller than the diameter of the first cylinder 432 so that the connecting shaft 430 can be machined. The third through holes 412 of the two first connecting rods 410 are respectively interference-fitted to the two second cylinders 433.

[0071] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and all such modifications and variations fall within the scope defined by the appended invention.

Claims

1. A concealed handle with a lock cylinder hole cover that opens by a flat rotation, characterized in that, include: A housing (100) is provided for installation in a mounting groove in a door panel, the housing (100) being provided with a lock cylinder hole (110) for installing a lock cylinder; A cover (300) is hinged to the housing (100) via a connecting rod assembly. The cover (300) has a first state covering the outer surface of the housing (100) along a first direction, and a second state partially offset from the housing (100) along a vertical direction and exposing the lock cylinder hole (110). The cover (300) in both the first and second states is arranged parallel to the housing (100). The cover (300) in the second state is spaced apart from the housing (100) along the first direction.

2. A concealed handle with a lock cylinder hole cover that can be rotated open according to claim 1, characterized in that, The linkage assembly includes a first linkage (410) and a second linkage (420). The first linkage (410) is located above the second linkage (420) in the vertical direction. One end of the first linkage (410) is hinged to the end of the housing (100) away from the cover (300), and the other end is hinged to the cover (300). One end of the second linkage (420) is hinged to the end of the housing (100) away from the cover (300), and the other end is hinged to the cover (300). The housing (100) has a movable groove (120) formed through it in a first direction. The movable groove (120) is parallel to the vertical direction. Both the first linkage (410) and the second linkage (420) are movably disposed in the movable groove (120).

3. A concealed handle with a horizontally rotating lock cylinder hole cover as described in claim 2, characterized in that, It also includes a magnetic attraction component, which is disposed on the housing (100) and the cover (300). When the cover (300) is in a first state, the magnetic attraction component generates a magnetic attraction force that causes the cover (300) and the housing (100) to attract each other.

4. A concealed handle with a lock cylinder hole cover that can be rotated open according to claim 3, characterized in that, The magnetic component includes a magnet (510) and a magnetic metal part (520). The magnet (510) is disposed on one of the cover (300) and the shell (100), and the magnetic metal part (520) is disposed on the other. When the cover (300) is in the first state, the magnet (510) and the magnetic metal part (520) attract each other.

5. A concealed handle with a lock cylinder hole cover that can be rotated open according to claim 3 or 4, characterized in that, There are two of each of the first link (410) and the second link (420), and the two first links (410) are arranged opposite each other along the second direction.

6. A concealed handle with a lock cylinder hole cover that opens horizontally according to claim 5, characterized in that, The housing (100) is rotatably connected to a connecting shaft (430) at one end away from the cover (300) in a second direction. The two first connecting rods (410) are respectively connected to the two sides of the connecting shaft (430) along the second direction at one end away from the cover (300), and rotate together with the connecting shaft (430).

7. A concealed handle with a lock cylinder hole cover that opens horizontally according to claim 6, characterized in that, An elastic element is provided at the hinge of the connecting rod assembly and the housing (100), the elastic element being used to apply a pre-torque force to the cover (300) to switch from a first state to a second state.

8. A concealed handle with a lock cylinder hole cover that opens horizontally according to claim 7, characterized in that, The elastic element is configured as a torsion spring (440), which is sleeved on the connecting shaft (430). One end of the torsion spring (440) is connected to the housing (100) by a torsion arm, and the torsion hook end of the torsion spring (440) is connected to the connecting shaft (430).

9. A concealed handle with a lock cylinder hole cover that can be rotated open according to any one of claims 6 to 8, characterized in that, The housing (100) has two U-shaped grooves (130) at one end away from the cover (300) along the first direction. The two U-shaped grooves (130) are spaced apart along the second direction. The connecting shaft (430) is rotatably connected to the two U-shaped grooves (130) on both sides along the second direction. The open end of the U-shaped groove (130) is detachably covered with a shaft pressure plate (140).

10. A concealed handle with a lock cylinder hole cover that opens horizontally according to claim 9, characterized in that, The housing (100) has a mounting threaded hole (160) on each side of the U-shaped groove (130) along the vertical direction. The shaft pressure plate (140) has a mounting through hole (141) corresponding to the mounting threaded hole (160). The mounting through hole (141) is used for mounting screws (142) to pass through, and the mounting screws (142) are matched with the mounting threaded holes (160).

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