A concealed link lock

Abstract

The application relates to a hidden connecting rod lock, which is used to solve the technical problems that the existing similar products are less likely to adopt the structure design of opening a dust cover through a hinge mode, and are less likely to adopt the technical problem of opening and positioning a dust cover through a pressing mode at a hinge. The key points are that a handle is arranged in a handle groove on one side of the base of the mechanism, a rotating shaft at one end of the handle extends out of the bottom of the base and is connected with a steel bolt assembly and / or a connecting rod assembly, a lock core at the other end of the handle is provided with a dust cover, the dust cover is rectangular, one end of the dust cover is fixed in a hinge groove of the handle through a pin shaft, the dust cover is pressed open through an elastic positioning element at the bottom of the pin shaft, the dust cover is positioned and opened, and the other end of the dust cover abuts against the other end of the handle on the plane outside the lock core groove; the elastic positioning element comprises a spring and a steel ball, the dust cover is positioned and opened and closed by the spring acting on the steel ball to abut against a positioning groove, or the elastic positioning element is a tension spring, the dust cover is positioned and opened at a position greater than 90 degrees by the tension spring.

Description

Technical Field

[0001] This invention relates to a handle-mounted flat lock, which is a concealed linkage lock. Background Technology

[0002] A handle-type flat lock is a type of door lock with a handle, commonly found on electrical cabinets. These cabinets are typically made of steel and are used to protect the components, requiring this type of lock to prevent the door from being opened unnecessarily. A typical handle-type flat lock includes a base, handle, pivot, and bolt assembly. The base houses a lock cylinder assembly and a button assembly for locking the handle, and is concealed behind a mounting hole on the door panel. Examples include Chinese patent application number 202510654791.8, published on July 15, 2025, entitled "Main and Auxiliary Double-Electric Handle Flat Lock"; and Chinese patent application number 202310437653.5, published on July 14, 2023, entitled "Concealed Handle Flat Lock". However, the dust cover design of the lock cylinder of the above-mentioned products and similar products is relatively simple. They generally use sliding dust covers or screw-fixed dust covers, and rarely open them by hinge or by pressing them at the hinge, thus making it convenient to use the key. Summary of the Invention

[0003] To overcome the above-mentioned shortcomings, the purpose of this invention is to provide a concealed linkage lock that addresses the problem that existing similar products rarely employ a hinged flip-top design to open the dust cover, and particularly rarely use a pressing method at the hinge to open the positioning dust cover. This objective is achieved through the following technical solution.

[0004] A concealed linkage lock comprises a base with a bolt assembly and / or a linkage assembly at its bottom. An actuator within the bolt assembly and / or linkage assembly is connected to a transmission component at one end of a rotating shaft extending from the bottom of the base. The other end of the rotating shaft is hinged to one end of a handle within a handle slot at the top of the base. A lock cylinder assembly is located at the other end of the handle. The handle is locked into the handle slot at the top of the base via the lock cylinder assembly. A dust cover is provided on the outer surface of the lock cylinder assembly on the handle. The key structural design feature is that the dust cover is rectangular and positioned in the dust cover slot of the handle or on the top surface of the handle. One end of the dust cover is fixed to the hinge slot of the handle by a pin. The dust cover is opened by pressing with an elastic positioning component at the bottom of the pin, simultaneously opening in a positioned position. The other end of the dust cover abuts against the other end of the handle on the outer surface of the lock cylinder slot. According to existing technology, the actuator is a transmission gear within the bolt assembly and linkage assembly, and the transmission component is an output gear at the extended end of the rotating shaft. The output gear meshes with the transmission gear, driving the bolt of the bolt assembly to rotate and the linkage assembly to move. Meanwhile, apart from opening by pressing one hinged end of the dust cover, the shape of the dust cover is different from the circular dust cover of existing locks. The other end of the dust cover is limited to the top plane of the handle or the groove of the dust cover, rather than being limited by the rib at the handle corresponding to the bottom of the dust cover opening.

[0005] The elastic positioning element includes a spring and a steel ball. The steel ball, fixed within the base below the elastic positioning element, abuts against a first or second steel ball groove at one end of the pin of the dust cover under the action of the spring. The above is a specific structural embodiment of an elastic positioning element.

[0006] The elastic positioning element is a tension spring. One end of the tension spring is connected to a tension spring lug near the end of the bottom side of the pin on the dust cover, and the other end of the tension spring is connected to a tension spring shaft or tension spring hanging point in the base below the pin. The above is another specific structural embodiment of an elastic positioning element.

[0007] The bottom of the dust cover above the elastic positioning component is provided with a spring lug that fixes one end of the tension spring. Near the pin, the spring lug has a first ball groove and a second ball groove. The tension spring passes through the tension spring hole in the middle of the first and second ball grooves. The pin is driven into the first and second ball grooves at the bottom of the dust cover from both sides. Therefore, the dust cover can be used for both springs and balls, as well as tension springs.

[0008] When the tension spring drives the dust cover to open, the dust cover opens at an angle greater than 90 degrees, and one end of the pin of the dust cover is abutted and limited at the limit point at the bottom of the handle groove in the lower base; when the tension spring drives the dust cover to close, the other end of the dust cover is limited at the top side of the groove step in the handle groove in the base.

[0009] The base beneath the lock cylinder assembly has a lock cylinder groove, and a lock shell sleeve, or a lock shell sleeve on the bolt side of the lock cylinder groove, is provided within the lock cylinder groove. Thus, the lock shell sleeve within the lock cylinder groove of the base forms a fully enclosed shell and a partially enclosed shell on the bolt side.

[0010] A lock housing seat, which is a scratch-resistant rubber sleeve, is provided in the through hole of the base below the lock cylinder assembly. Thus, the lock cylinder slot of the aforementioned base is replaced by a lock housing seat.

[0011] The handle has a lock cylinder assembly with a lock cylinder seat at one end. A first groove is provided at the bottom edge of the lock cylinder seat or at the bottom of the handle at the lock cylinder assembly. A second groove is provided at the top opening of the lock cylinder groove in the base or at the top opening of the lock housing seat corresponding to the first groove. When the handle is reset into the handle groove of the base, the first groove and the second groove align and engage. This structural design increases the waterproofness of the dust cover and the handle; furthermore, the addition of foamed waterproof adhesive at the top opening of the lock cylinder seat or lock housing seat further enhances its waterproof effect.

[0012] The bottom of one end of the handle's pivot is provided with a plastic anti-scratch pad, and the bottom of the base corresponding to the plastic anti-scratch pad is provided with a raised anti-collision platform. The width of the plastic anti-scratch pad is greater than the width of the handle.

[0013] The bottom of the dust cover on the other side of the pin is provided with a soft pad, and the bottom of the dust cover at this end is limited by the soft pad to the top side of the groove step of the handle groove in the base.

[0014] The base has two symmetrically arranged mounting ears on the outer diameter of the top groove of the handle groove. The top groove of the handle groove of the base is higher than the plane and a sealing gasket is provided on the outer plane. The base is hidden and fixed to the rear of the mounting hole of the door panel through the mounting ears. The top groove of the handle groove of the base is flush with the mounting hole of the door panel.

[0015] The lower transmission bar of the linkage assembly has a downwardly protruding limiting edge on the bottom edge of the base. The limiting edge has a limiting groove, or the inner side of the limiting edge and the outer diameter of the protrusion at the bottom of the base form a guide groove. The middle section of the lower transmission bar is limited in the limiting groove or guide groove to form a guide. The length of the lower transmission bar is greater than the length of the upper transmission bar on the other side of the linkage assembly.

[0016] The present invention has a reasonable and simple structural design, is convenient to produce, assemble and use, has a good concealment effect of the base, with only the handle exposed on the door panel, and has a good sealing and dustproof effect. In particular, the handle is guaranteed to pop out and be used through the dual action of torsion spring and pin. It is suitable for use as a concealed linkage lock, as well as for structural improvements of similar products. Attached Figure Description

[0017] Figure 1 This is an exploded structural diagram of Embodiment 1 of the present invention.

[0018] Figure 2 yesFigure 1 This is a cross-sectional view of the assembly with the dust cover open. The framed part in the figure has been enlarged.

[0019] Figure 3 yes Figure 1 The diagram shows an enlarged view of the rear of the handle, with a dust cover installed.

[0020] Figure 4 yes Figure 1 The diagram shows an enlarged view of the rear of the assembled base, omitting the bolt assembly and connecting rod assembly.

[0021] Figure 5 This is an exploded structural diagram of Embodiment 2 of the present invention.

[0022] Figure 6 This is a three-dimensional structural schematic diagram of Embodiment 3 of the present invention.

[0023] Figure 7 yes Figure 6 A schematic diagram of the internal structure of the dust cover is shown in the figure, with the dust cover omitted.

[0024] Figure 8 yes Figure 6 The diagram shows a cross-sectional view, with the framed area enlarged and the dotted line indicating the dust cover is open.

[0025] Attached figures and their names: 1. Base, 101. Limiting edge, 2. Bolt assembly, 3. Linkage assembly, 4. Rotating shaft, 5. Pin, 6. Handle, 7. Spring, 8. Steel ball, 9. Dust cover, 901. Tension spring lug, 10. Soft pad, 11. Lock cylinder assembly, 12. Lock cylinder seat, 13. Sealing washer, 14. Lock case sleeve, 15. Tension spring, 16. Lock case seat, 17. Plastic anti-scratch pad. Implementation

[0026] The structure and use of the present invention will now be further described with reference to the accompanying drawings. Figures 1-8 As shown, the base 1 of the mechanism has a bolt assembly 2 and a connecting rod assembly 3 at its bottom. The actuators in the bolt assembly and connecting rod assembly are connected to a transmission component at one end of a rotating shaft 4 extending from the bottom of the base. The other end of the rotating shaft is hinged to one end of a handle 6 in a handle groove at the top of the base. The other end of the handle has a lock cylinder assembly 11. The handle is locked in the handle groove at the top of the base by the lock cylinder assembly. A dust cover 9 is provided on the outer surface of the lock cylinder assembly of the handle. The dust cover is rectangular and is located in the dust cover groove of the handle or on the top surface of the handle. One end of the dust cover is fixed in the hinge groove of the handle by a pin 5. The dust cover is opened by pressing the elastic positioning component at the bottom of the pin, and the other end of the dust cover abuts against the other end of the handle on the outer surface of the lock cylinder groove. Figures 1-4In the first embodiment shown, the elastic positioning component includes a spring 7 and a steel ball 8. The steel ball, fixed within the base below the elastic positioning component, abuts against the first or second steel ball groove at one end of the pin of the dust cover under the action of the spring. Figures 5-8 In Embodiments 2 and 3, the elastic positioning element is a tension spring 15. One end of the tension spring is connected to a tension spring lug 901 near the end of the bottom of the pin side of the dust cover, and the other end of the tension spring is connected to a tension spring shaft or tension spring hanging point in the base below the pin. The bottom of the dust cover above the elastic positioning element has a tension spring lug that fixes one end of the tension spring protruding. A first steel ball groove and a second steel ball groove are provided near the pin side of the tension spring lug. The tension spring passes through the tension spring hole in the middle of the first and second steel ball grooves. The pin is driven into the first and second steel ball grooves at the bottom of the dust cover from both sides. When the tension spring causes the dust cover to open, the dust cover opens at an angle greater than 90 degrees, and the end of the pin side of the dust cover is confined to the limiting point (first dead point of the tension spring) at the bottom of the handle groove in the lower base. When the tension spring causes the dust cover to close, the other end of the dust cover is confined to the top side of the handle groove in the base (second dead point of the tension spring).

[0027] In the first embodiment described above, a lock cylinder groove is provided in the base below the lock cylinder assembly, and a lock shell sleeve 14 is provided in the lock cylinder groove, or a lock shell sleeve on the side of the lock tongue of the lock cylinder groove. In the second and third embodiments described above, a lock shell seat 16 is provided in the through hole at the base below the lock cylinder assembly, and the lock shell seat is a scratch-resistant rubber sleeve.

[0028] In the above embodiments one, two, and three, a lock cylinder seat 12 is provided at the bottom of one end of the lock cylinder assembly of the handle. A first groove is provided at the bottom edge of the lock cylinder seat or at the bottom of the handle at the lock cylinder assembly. A second groove is provided at the top opening of the lock cylinder groove in the base or at the top opening of the lock housing seat corresponding to the first groove. When the handle is reset into the handle groove of the base, the first groove and the second groove are aligned and fitted. A soft pad 10 is provided at the bottom of the dust cover on the other side symmetrical to the pin. The bottom of the dust cover at this end is limited by the soft pad at the top side of the groove step of the handle groove in the base. The outer diameter of the top groove of the handle groove of the base is provided with two symmetrically arranged mounting ears. The top groove of the handle groove of the base is higher than the plane and the outer plane is provided with a sealing gasket 13. The base is hidden and fixed to the rear of the mounting hole of the door panel through the mounting ears. The lower drive bar of the connecting rod assembly has a downwardly protruding limiting edge 101 at the bottom edge of the base. A limiting groove is provided at the limiting edge, or the inner side of the limiting edge and the outer diameter of the protrusion at the bottom of the base form a guide groove. The middle section of the lower drive bar is limited by the limiting groove or guide groove to form a guide. The length of the lower drive bar is greater than the length of the upper drive bar on the other side of the connecting rod assembly. In the above embodiment three, a plastic anti-scratch pad 17 is provided at the bottom of one end of the handle's rotating shaft. A raised anti-collision platform is provided at the bottom of the base corresponding to the plastic anti-scratch pad. The width of the plastic anti-scratch pad is greater than the width of the handle. The dust cover in embodiments two and three can also omit the first and second ball grooves on the pin side and the corresponding protruding structure, retaining only the spring lug structure.

[0029] The specific usage of Example 1 is as follows: 1. When the dust cover is closed, the steel ball contacts the arc surface of the first steel ball groove of the dust cover, and the spring has an upward force, causing the tail of the dust cover to close downward. 2. During the opening process of the dust cover, the steel ball will retract into the round hole, and after opening, it will be positioned in the same way, until the steel ball contacts the arc surface of the second steel ball groove of the dust cover. The specific usage of Example 2 is as follows: 1. When the dust cover is closed, the dead point of the tension spring is on the right side, and the other end of the dust cover is limited to the top side of the groove step of the handle groove in the base, and the soft pad contacts and positions the handle. 2. When the dust cover is opened, the dead point of the tension spring is on the left side, the positioning surface of the dust cover and the handle is inside the product, and the pin side end of the dust cover abuts and is limited to the limiting point at the bottom of the handle groove in the lower base, so there is no need to worry about scratches being exposed.

[0030] Example 3 has the following features: 1) The handle initially adopts a scratch-resistant paint structure, with the handle and base inner side limiting each other, providing initial scratch resistance. 2) A plastic scratch-resistant pad is added to the handle, with a width greater than the handle width, ensuring that the handle and base do not scratch each other when locking. 3) The base adopts a split design, reducing the cost and processing difficulty of the base, and increasing the waterproofness of the dust cover. 4) Due to the long overall length of the lower transmission bar of the linkage assembly, it is prone to swaying left and right. A limiting groove or guide groove is added to the middle section of the lower transmission bar for guidance. The structure mainly relies on the base to bear the overall force, while the dust cover and handle are slightly higher than the base for scratch resistance. 5) When locking, the lock tongue will rub against the base, and the lock cylinder and base are easily scratched. Here, a lock housing is added between the base and the handle as a scratch-resistant structure, ensuring that when the handle is closed, it only contacts the dust cover of the base.

[0031] In summary, after installation, only the handle and dust cover of this concealed linkage lock are exposed on the cabinet door, achieving a good flush effect. At the same time, the handle and dust cover are flush with the overall appearance, with no recessed areas. The dust cover adopts a flip-top structure and is on the same plane as the handle. The handle has a reinforced anti-scratch paint structure. The base dust cover has three functions in one, integrating anti-scratch, waterproof, and transmission bar guidance.

[0032] The above description is intended to illustrate the technical means of the present invention and is not intended to limit the scope of the invention. Any obvious improvements or substitutions made to the present invention by those skilled in the art based on existing common knowledge also fall within the protection scope of the claims of the present invention. For example, the dust cover may only have steel balls, a spring sleeve, and corresponding first and second steel ball grooves; or the dust cover may only have a tension spring, with corresponding tension spring fixing positions respectively provided in the dust cover and the base.

Claims

1. A concealed linkage lock, wherein a base (1) of the mechanism is provided with a bolt assembly (2) and / or a linkage assembly (3) at its bottom, an actuator in the bolt assembly and / or linkage assembly is connected to a transmission component at one end of a rotating shaft (4) extending from the bottom of the base, the other end of the rotating shaft is hinged to one end of a handle (6) in a handle groove at the top of the base, and a lock cylinder assembly (11) is provided at the other end of the handle, the handle is locked in the handle groove at the top of the base by the lock cylinder assembly, and a dust cover (9) is provided on the outer surface of the lock cylinder assembly of the handle; characterized in that The dust cover (9) is rectangular and is set in the dust cover groove of the handle or the top plane of the handle. One end of the dust cover is fixed in the hinge groove of the handle (6) by a pin (5). The dust cover is opened by pressing the elastic positioning member at the bottom of the pin. At the same time, the dust cover is positioned open. The other end of the dust cover abuts against the other end plane of the handle outside the lock cylinder groove.

2. The concealed linkage lock according to claim 1, characterized in that... The elastic positioning element includes a spring (7) and a steel ball (8). The steel ball is fixed in the base (1) below the elastic positioning element and abuts against the first or second steel ball groove on one side of the pin (5) of the dust cover (9) by the action of the spring.

3. The concealed linkage lock according to claim 1, characterized in that... The elastic positioning component is a tension spring (15). One end of the tension spring is connected to the tension spring lug (901) near the end of the bottom side of the pin (5) of the dust cover (9), and the other end of the tension spring is connected to the tension spring shaft or tension spring hanging point in the base (1) below the pin.

4. The concealed linkage lock according to claim 3, characterized in that... The bottom of the dust cover (9) above the elastic positioning member is provided with a spring ear (901) with one end of the spring (15) protruding. The spring ear is provided with a first steel ball groove and a second steel ball groove on the side near the pin (5). The spring passes through the spring hole in the middle of the first steel ball groove and the second steel ball groove. The pin is driven into the first steel ball groove and the second steel ball groove at the bottom of the dust cover from both sides.

5. The concealed linkage lock according to claim 3, characterized in that... When the tension spring (15) drives the dust cover (9) to open, the dust cover opens at an angle greater than 90 degrees, and one end of the pin (5) of the dust cover is abutted and limited at the limit point at the bottom of the handle groove in the lower base (1); when the tension spring drives the dust cover to close, the other end of the dust cover is limited at the top side of the handle groove in the base.

6. The concealed linkage lock according to claim 1, characterized in that... The base (1) below the lock cylinder assembly (11) is provided with a lock cylinder groove, and a lock shell sleeve (14) is provided in the lock cylinder groove, or a lock shell seat (16) is provided in the through hole of the base below the lock cylinder assembly, and the lock shell seat is a scratch-resistant rubber sleeve.

7. The concealed linkage lock according to claim 6, characterized in that... The bottom of one end of the lock cylinder assembly (11) of the handle (6) is provided with a lock cylinder seat (12). The bottom edge of the lock cylinder seat or the bottom of the handle at the lock cylinder assembly is provided with a first groove. The top groove of the lock cylinder groove in the base (1) corresponding to the first groove or the top seat of the lock shell seat (16) is provided with a second groove. When the handle is reset to the handle groove of the base, the first groove and the second groove are aligned and fitted.

8. The concealed linkage lock according to claim 1, characterized in that... The bottom of one end of the pivot (4) of the handle (6) is provided with a plastic anti-scratch pad (17), and the bottom of the base (1) corresponding to the plastic anti-scratch pad is provided with a raised anti-collision platform. The width of the plastic anti-scratch pad is greater than the width of the handle.

9. The concealed linkage lock according to claim 1, characterized in that... The bottom of the dust cover (9) on the other side of the pin (5) is provided with a soft pad (10), and the bottom of the dust cover is located at the top side of the groove step of the handle groove in the base (1) by the soft pad.

10. The concealed linkage lock according to claim 1, characterized in that... The lower transmission bar of the connecting rod assembly (3) has a downwardly protruding limiting edge (101) at the bottom edge of the base (1). The limiting edge has a limiting groove, or the inner side of the limiting edge and the outer diameter of the bottom protrusion of the base form a guide groove. The middle section of the lower transmission bar is limited in the limiting groove or guide groove to form a guide. The length of the lower transmission bar is greater than the length of the upper transmission bar on the other side of the connecting rod assembly.

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