Simple double drive opening and closing lock mechanism

Abstract

This utility model discloses a simple dual-drive locking mechanism, comprising an integrally formed first transmission component, a second transmission component, and a limiting guide component. The first transmission component has a driving tenon, an arc-shaped tooth, and a spline sleeve, which are respectively connected to electric and manual drive sources; the second transmission component has a driven tenon groove that engages with the driving tenon and a wedge-shaped guide block; the limiting guide component has a linear guide groove and an eccentric guide groove. Through the side contact transmission between the driving tenon and the driven tenon groove, the rotational torque is converted into linear thrust, driving the bolt to extend and retract; the mechanism adopts an integral molding design, combined with the sliding constraint of the limiting stepped pin and the eccentric guide groove, to achieve interference-free switching between dual drive modes. It features a compact structure, stable transmission, and simple assembly, effectively solving the problems of complex structure and easy wear of traditional dual-drive locks. The wedge design of the guide block further improves the smoothness of movement and positioning accuracy.

Description

Technical Field

[0001] This utility model relates to the field of lock mechanical transmission, specifically to a simple dual-drive opening and closing lock mechanism. Background Technology

[0002] Traditional dual-drive locking mechanisms generally suffer from complex structures and cumbersome assembly processes. These locks typically employ a multi-part, modular design, which not only increases manufacturing costs but also leads to lengthy installation and debugging times. Regarding the transmission structure, existing technologies often use gear sets or linkage mechanisms to transmit power. This design not only occupies a large space but is also prone to transmission failure due to component wear during long-term use.

[0003] In addition, the split-type transmission components are prone to deformation under stress, which affects the overall service life of the lock.

[0004] To address the aforementioned issues, existing technologies urgently need improvement. Summary of the Invention

[0005] This utility model provides a simple dual-drive opening and closing lock mechanism, including: a first transmission component, a second transmission component, and a limiting guide component; The first transmission component includes a drive tenon and a power input structure; The second transmission component includes a driven tenon and a guide block that engage with the driving tenon; The limiting guide component includes a guide groove that mates with the guide block; The limiting guide component is rigidly connected to the housing; the guide block is slidably connected to the guide groove; the second transmission component is connected to the locking tongue; the driving tenon transmits torque to the driven tenon groove, pushing the second transmission component to move linearly along the guide groove, thereby causing the locking tongue to extend and retract. The power input structure includes an arc-shaped tooth and a spline sleeve; the arc-shaped tooth is located on the outside of the first transmission component and is connected to an electric drive source; the spline sleeve is located at the center of the first transmission component and is connected to a manual drive input component.

[0006] The guide groove is straight and parallel to or overlaps with the straight line in the direction of the latch extension and retraction, and is usually arranged in parallel; the driving tenon is a cuboid boss; the driven tenon groove is a rectangular groove with an inlet-type flared cut; the rectangular groove matches the bottom surface of the cuboid boss; the opening direction of the driven tenon groove is perpendicular to the direction of the latch extension and retraction; the guide block is wedge-shaped, and its inclined surface is set towards the latch connection direction.

[0007] The first transmission component further includes a limiting stepped pin; the limiting guide component further includes an eccentric guide groove; the limiting stepped pin and the eccentric guide groove are slidably engaged, which can constrain the rotational stroke of the first transmission component and provide radial support during transmission.

[0008] The axial cross-section of the limiting stepped pin is T-shaped; its head diameter is larger than the groove width of the eccentric guide groove and it is fixed on the first transmission component; its tail diameter is slightly smaller than the groove width of the eccentric guide groove and it slides in the eccentric guide groove; the eccentric guide groove is an arc-shaped groove.

[0009] The second transmission component also includes a stop plate; the stop plate abuts against a fixed structure inside the housing, the fixed structure being a fixing pin, which limits the sliding of the second transmission component toward the locking tongue; at the same time, the outer side of the stop plate slides against the inner sidewall of the housing, providing support for the second transmission component parallel to the direction of the driven tenon opening, so that the driven tenon always remains in close contact with the driving tenon.

[0010] The simplified dual-drive locking mechanism also includes a latch hole on the housing for the latch to extend and retract. The second transmission component also includes a latch connecting seat, the width of which is greater than the width of the latch hole, thus restricting the latch connecting seat from extending with the latch.

[0011] The first transmission component is integrally formed; the second transmission component is integrally formed.

[0012] When the power input structure receives rotational driving force, the first transmission component drives the driving tenon to rotate. After the driving tenon is engaged in the driven tenon groove of the second transmission component, the rotational torque is converted into linear thrust through the contact of the side wall of the tenon groove. Under the action of the thrust, the second transmission component slides along the guide groove of the limiting guide component, causing the locking tongue to extend or retract. The engaging design of the driving tenon and the driven tenon groove eliminates intermediate transmission components such as gears and connecting rods, making the overall structure compact.

[0013] The straight guide groove restricts the freedom of movement of the guide block, allowing the second transmission component to translate only along the extension and retraction direction of the latch. The parallel design of the guide groove and the extension and retraction direction of the latch ensures that the torque transmitted by the driving tenon is completely converted into linear driving force, avoiding energy loss due to angular deviation. When the first transmission component rotates, the guide block slides in the straight guide groove as the driving tenon pushes the driven tenon groove, forming a stable axial constraint and preventing the second transmission component from radially deviating.

[0014] The arc-shaped teeth and spline sleeve occupy the outer periphery and central area of ​​the transmission component, respectively, forming a spatially complementary layout. When electrically driven, the motor gear meshes with the arc-shaped teeth to drive the first transmission component to rotate, at which time the spline sleeve is in a non-working state. When manually operated, the rotating handle directly drives the first transmission component to rotate through the spline sleeve, at which time the arc-shaped teeth are in a non-working state. The two driving modes are switched without interference through spatial isolation. The first transmission component, as an integrated carrier of dual power input, is compatible with both driving paths through a single rotational motion, avoiding the redundancy of parts caused by the separate setting of electric and manual drive chains in traditional solutions.

[0015] The sliding engagement between the limiting stepped pin and the eccentric guide groove constrains the rotation angle of the first transmission component through physical contact. When the first transmission component rotates under driving force, the limiting stepped pin slides along the arc-shaped trajectory of the eccentric guide groove, and the side wall of the pin tail contacts the end of the guide groove to form a hard limit, preventing overtravel of rotation. At the same time, the pin head and the guide groove wall always maintain sliding friction contact during transmission, providing radial support force and suppressing the radial offset of the first transmission component caused by torque transmission. The arc-shaped design of the eccentric guide groove makes the movement path of the limiting stepped pin eccentric with the axis of rotation, further strengthening the restriction on the swing amplitude of the transmission component.

[0016] The driving tenon is a cuboid boss, and the driven tenon is a rectangular groove with a flared inlet. The mating relationship between the cuboid boss and the rectangular groove forms a planar contact transmission interface. During torque transmission, the uniform stress distribution on the contact surface prevents localized stress concentration. The flared inlet guides the boss to slide into the groove along a predetermined path, preventing jamming during torque transmission. The mating bottom surfaces create a self-locking effect at the transmission interface, preventing relative sliding displacement under load. This structural combination, through complementary geometric matching, enhances the deformation resistance of the contact areas while maintaining transmission accuracy.

[0017] The wedge shape refers to the guide block having an inclined contact surface, which can be achieved using an elliptical frustum structure with a trapezoidal cross-section. The inclined surface facing the latch connection direction means that the inclined surface of the guide block extends along the latch's extension / retraction trajectory. When the second transmission component is driven to the point where the latch extends, the inclined surface of the wedge-shaped guide block contacts the sidewall of the guide groove's limiting port. During the contact process, the inclined surface forms a progressive pressure distribution, while simultaneously consuming impact energy through sliding friction, avoiding instantaneous rigid collisions between the right-angle edge and the guide groove, thus reducing vibration and noise. Simultaneously, the self-guiding characteristic of the inclined surface eliminates trajectory deviation. When the inclined surface of the guide block contacts the limiting port of the guide groove, a pressure component is generated in the direction of the first transmission component, ensuring that the driven tenon of the second transmission component remains tightly fitted with the driving tenon of the first transmission component.

[0018] The first and second transmission components integrate the driving and guiding functional units into a single part through integral molding processes. This eliminates the stress concentration problem at the connection points in the split structure, avoids offset caused by assembly errors, and ensures uniform force on the contact surfaces during torque transmission.

[0019] As can be seen from the above, the simple dual-drive opening and closing lock mechanism provided by this utility model has the advantages of simple and compact structure, convenient assembly, high transmission stability and long service life. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the internal structure of a simple dual-drive opening and closing lock mechanism according to the present invention.

[0021] Figure 2 This is a schematic diagram showing the connection relationship between the first transmission component, the second transmission component, and the limiting guide component in a simple dual-drive opening and closing lock mechanism of this utility model.

[0022] Figure 3 This is another schematic diagram showing the connection relationship between the first transmission component, the second transmission component, the limiting guide component, and the electric drive mechanism in a simple dual-drive opening and closing lock mechanism of this utility model.

[0023] Figure 4 This is a schematic diagram showing the connection relationship between the first and second transmission components in a simple dual-drive opening and closing lock mechanism of this utility model.

[0024] Figure 5 This is a schematic diagram of the first transmission component in Embodiment 1.

[0025] Figure 6 This is a schematic diagram of the first transmission component in Embodiment 2. Detailed Implementation

[0026] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. In the description of this utility model, the terms "first", "second", etc. are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] Example 1 A simple dual-drive opening and closing lock mechanism includes: a first transmission component 1, a second transmission component 2, a limiting guide component 3, and an electric drive mechanism 4; The first transmission component 1 is a metal part, integrally formed by die casting process, including a driving tenon 11, a limiting stepped pin 12, an arc-shaped tooth 13 and a spline sleeve 14; The second transmission component 2 is a metal part, integrally formed by sheet metal stamping process, including guide block 21, stop plate 22, lock tongue connecting seat 23 and driven tenon groove 24; The limiting guide component 3 is a metal component, integrally formed by sheet metal stamping process, including a straight guide groove 31 parallel to the extension and retraction direction of the latch and an arc-shaped eccentric guide groove 32. The electric drive mechanism 4 is connected to the lock / unlock control circuit, and its output is an electric drive gear 41. The limiting guide component 3 is rigidly connected to the housing via a fixing pin; the guide block 21 is engaged with and slidably connected to the guide groove 31; the latch connecting seat 23 is fixedly connected to the latch; the driving tenon 11 engages with the driven tenon groove 24, and the driving tenon 11 transmits torque to the driven tenon groove 24, pushing the second transmission component 2 to move linearly along the guide groove 31, thereby causing the latch to extend and retract; the arc-shaped tooth 13 is located on the outside of the first transmission component 1, and has an arc-shaped tooth profile, meshing with the electric drive gear 41 to achieve smooth electric drive; the spline sleeve 14 is located at the center of the first transmission component 1, and the outside of the spline sleeve 14 is sleeved on the housing and rotatably connected to the housing. The spline sleeve 14 has a standard spline groove inside, which facilitates the connection of a knob or key core, and enables backup operation or quick opening and closing of the lock from the inside of the closed body when the power is off.

[0028] The driving tenon 11 is a cuboid boss, and all exposed edges of the cuboid boss are rounded and hardened to improve wear resistance. The driven tenon 24 is a rectangular groove with a flared inlet, and the rectangular groove matches the bottom surface of the cuboid boss. The opening direction of the driven tenon 24 is perpendicular to the extension and retraction direction of the latch.

[0029] The limiting stepped pin 12 has a T-shaped axial cross-section. Its head diameter is larger than the slot width of the eccentric guide groove 32 and it is fixed on the first transmission member 1, providing radial support during transmission. Its tail diameter is smaller than the slot width of the eccentric guide groove 32 by 0.3 mm and slides in the eccentric guide groove 32, which can constrain the rotation stroke of the first transmission member 1. The central angle corresponding to the arc of the eccentric guide groove 32 is 60 degrees.

[0030] The stop plate 22 abuts against the fixing pin inside the housing, limiting the sliding of the second transmission member 2 towards the locking tongue; at the same time, a pulley is provided on the outer side of the stop plate 22, which slides against the inner side wall of the housing, providing support for the second transmission member 2 parallel to the opening direction of the driven tenon 24, so that the driven tenon 24 always keeps in close contact with the driving tenon 11.

[0031] The simplified dual-drive locking mechanism also includes a latch hole on the housing for the latch to extend and retract. The latch is stepped, with the thinner side embedded in and fixedly connected to the latch connecting seat 23. The width of the latch connecting seat 23 is greater than the width of the latch hole, thus limiting the extension of the latch. When the lock is closed, the thicker part of the latch is outside the latch hole and extends into the fixed lock hole on the door frame, while the thinner part is retained in the hole and combined with the latch connecting seat 23. The entire latch structure is latched between the latch hole and the lock hole, forming an effective mechanical lock and ensuring the lock's stability.

[0032] Among them, the guide block 21 of the second transmission component 2 is integrally formed by precision punching and deep drawing process to form a wedge structure with a 30-degree slope to the base surface. The slope faces the lock tongue connection direction. The wedge structure is a quasi-elliptical cone with a right trapezoidal side section. It forms a gradient section in the thickness direction and the root transition area is rounded to enhance the structural strength. The first transmission component 1 is provided with a first irregularly shaped hollow 15 and a second irregularly shaped hollow 16 with a radially open horseshoe-shaped structure, which reduces material usage by about 30% and weight by about 30%, effectively reducing production costs and making the first transmission component 1 lighter and more energy-efficient; the first transmission component 1 is also provided with an adapter hole 19 for adapting to other products, which facilitates integration into different lock systems.

[0033] In Embodiment 1, both the first transmission component 1 and the second transmission component 2 integrate the driving function unit and the guiding function unit into a single component through an integral molding process; this eliminates the stress concentration problem at the connection points such as fatigue failure and loosening of bolt connection points or rivet points in the split structure, avoids the offset caused by assembly errors, and ensures uniform force on the contact surface during torque transmission.

[0034] Example 2 Example 2 is a modification of Example 1: the first transmission component 1 further includes a driving tenon joint hole 17 and a limiting stepped pin joint hole 18. The driving tenon joint hole 17, the limiting stepped pin joint hole 18 and the arc-shaped tooth 13 in the first transmission component 1 are integrally formed by sheet metal stamping process. The driving tenon 11 is riveted to the first transmission component 1 through the driving tenon joint hole 17; the limiting stepped pin 12 is riveted to the first transmission component 1 through the limiting stepped pin joint hole 18.

[0035] The first transmission component 1 in Embodiment 2 is simple to manufacture and can be mass-produced. The sheet metal stamping process is cheaper and more efficient than the die casting process. However, the riveting points may loosen after high-frequency use, and the overall rigidity is slightly lower than that in Embodiment 1. It is suitable for low-cost or light-load application scenarios.

Claims

1. A simple double drive opening and closing lock mechanism, characterized by, include: First transmission component (1), second transmission component (2) and limiting guide component (3); The first transmission component (1) includes a drive tenon (11) and a power input structure; The second transmission component (2) includes a driven tenon (24) that engages with the driving tenon (11) and a guide block (21). The limiting guide component (3) includes a guide groove (31) that cooperates with the guide block (21). The limiting guide component (3) is rigidly connected to the housing; the guide block (21) is slidably connected to the guide groove (31); the second transmission component (2) is connected to the lock tongue; the driving tenon (11) transmits torque to the driven tenon groove (24), pushing the second transmission component (2) to move linearly along the guide groove (31), thereby causing the lock tongue to extend and retract.

2. A simple double drive opening and closing lock mechanism according to claim 1, characterized in that: The guide groove (31) is straight and parallel to or overlaps with the straight line in the direction of the extension and retraction of the latch.

3. A simple double drive opening and closing lock mechanism according to claim 1, characterized in that: The first transmission component (1) also includes a limiting step pin (12), and the limiting guide component (3) also includes an eccentric guide groove (32); the limiting step pin (12) and the eccentric guide groove (32) are in sliding fit, which can constrain the rotation stroke of the first transmission component (1) and provide radial support during transmission.

4. A simple double drive opening and closing lock mechanism according to claim 3, characterized in that: The axial cross section of the limiting step pin (12) is T-shaped. Its head diameter is greater than the slot width of the eccentric guide groove (32) and it is fixed on the first transmission member (1). Its tail diameter is smaller than the slot width of the eccentric guide groove (32) and it slides in the eccentric guide groove (32). The eccentric guide groove (32) is an arc-shaped groove.

5. A simple double drive opening and closing lock mechanism according to claim 1, characterized in that: The power input structure includes at least one of an arc-shaped tooth (13) and a spline sleeve (14); the arc-shaped tooth (13) is located on the outside of the first transmission member (1) and is connected to an electric drive source; the spline sleeve (14) is located at the center of the first transmission member (1) and is connected to a manual drive input component.

6. A simple double drive opening and closing lock mechanism according to claim 1, characterized in that: The driving tenon (11) is a cuboid boss; the driven tenon (24) is a rectangular groove; the rectangular groove matches the bottom surface of the cuboid boss.

7. A simple double drive opening and closing lock mechanism according to claim 1, characterized in that: The guide block (21) is wedge-shaped, with its inclined surface facing the direction of the latch connection.

8. A simple double drive opening and closing lock mechanism according to claim 1, characterized in that: The second transmission member (2) also includes a stop plate (22); the stop plate (22) abuts against the fixed structure inside the housing, thereby limiting the sliding of the second transmission member (2) toward the locking tongue.

9. A simple double drive opening and closing lock mechanism according to any one of claims 1 to 8, characterized in that: The second transmission component (2) is integrally formed.

10. A simple double drive opening and closing lock mechanism according to any one of claims 1 to 8, characterized in that: The first transmission component (1) is integrally formed.

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