A quick connect device

Abstract

The utility model discloses a quick plug connection device, including the female fastener and male fastener of plug connection, the male fastener includes base part and buckle part, the buckle part includes multiple petal claw, the included angle of claw and horizontal plane is 30~75 DEG, the utility model discloses the inclination angle design of claw and horizontal plane, when the device is subjected to axial tension, the inclined plane can convert external force into radial self -locking force, and the greater the tension, the stronger locking force, fundamentally solved the problem of traditional straight wall buckle easy separation, screw fixed easy slip tooth. The end of internal mould part is expanded structure and forms mechanical occlusion with claw, further enhances the anti -pulling ability, can adapt to vehicle, outdoor vibration or external force interference scene.

Description

Technical Field

[0001] This utility model relates to the field of lighting wire connection technology, specifically to a quick-connect device. Background Technology

[0002] In the lighting manufacturing industry, the reliability and assembly efficiency of wire connection devices directly affect product quality and production efficiency. Currently, mainstream connection solutions in the industry have many technical shortcomings, making it difficult to meet the demands of modern lighting fixtures for stability, efficiency, and ease of maintenance.

[0003] In existing technologies, self-tapping screws are used for fixing structures. The core of this method is to drill holes in the stress-relieving component (SR, typically made of PP material) and then use plastic self-tapping screws to tighten the connection. However, this solution has fundamental flaws: First, PP material is soft and has poor wear resistance, making it prone to stripping when repeatedly tightened. Over time, the contact surface between the screw and the PP material will gradually wear down due to vibration, temperature changes, and other factors, causing the tightening force to continuously decline. In severe cases, this can lead to loosening of the wires or even short circuits and open circuits, posing safety hazards. Second, during maintenance and disassembly, the rigid contact between the screw and the PP material inevitably damages the drilled hole structure of the SR, making it impossible to guarantee the connection strength during reassembly. This forces companies to replace the entire SR component, increasing maintenance costs and wasting resources.

[0004] Another solution employs a vertical angle snap-fit ​​structure. Its straight-wall snap-fit ​​design lacks beveled guidance, achieving connection solely through rigid contact between the snap-fit ​​and the slot. Lacking a self-locking mechanism, this structure is highly susceptible to separation under external forces (such as wire dragging or vibration). To compensate for this deficiency, the industry typically uses adhesive application for reinforcement, applying adhesive to the snap-fit ​​connection to enhance stability. However, this process not only increases production steps but also introduces new problems: the adhesive ages over long-term use due to temperature changes, UV exposure, and other factors, leading to decreased adhesion. Furthermore, the adhesive application process requires high precision; excessive adhesive can overflow and contaminate internal components, while insufficient adhesive fails to provide effective reinforcement, further reducing the production yield. In addition, the anti-rotation performance of the vertical snap-fit ​​relies on the friction between the snap-fit ​​and the slot; under long-term vibration, relative rotation can occur, potentially causing internal wire breakage or poor contact, affecting the normal operation of the lamp.

[0005] With the development of the lighting industry, the market demands increasingly stringent requirements for connection devices: in automotive lighting, continuous vibration and temperature fluctuations are required, demanding extremely strong pull-out resistance; in outdoor lighting, weathering from wind, rain, and ultraviolet radiation is necessary, requiring long-term stability of the connection structure; and in indoor precision lighting, assembly efficiency and ease of maintenance must be balanced to avoid increased after-sales costs due to connection issues. Existing technologies can no longer meet the needs of diverse scenarios. Therefore, developing a connection device that combines self-locking anti-pull-out properties, rapid assembly, structural stability, and convenient maintenance has become a pressing technical challenge for the industry. Utility Model Content

[0006] The present invention aims to overcome at least one of the defects of the prior art and provide a quick-connect device to solve the problems of easy separation, low assembly efficiency and difficult maintenance of existing lamp connection devices.

[0007] This utility model provides a quick-connect device, including a female fastener and a male fastener for insertion; the male fastener includes a base part and a snap-fit ​​part; the snap-fit ​​part includes a plurality of snap claws; the angle between the snap claws and the horizontal plane is 30-75°.

[0008] The quick-connect device of this utility model consists of a female fastener and a male fastener that interlock, and the two are connected through structural cooperation. The male fastener is divided into a base part and a snap-fit ​​part. The base part is used to fix the wire or lamp component, and the snap-fit ​​part is the key structure for achieving locking.

[0009] The snap-fit ​​part of this invention adopts a multi-lobed claw structure. The multi-lobed design ensures even force distribution and prevents single claw from breaking due to overload. The angle between the claw and the horizontal plane is set at 30-75°. This angle range is the core of achieving "self-locking." When subjected to axial tension, the inclined surface converts the tension into radial locking force. If the angle is too small, the insertion resistance will be too high; if the angle is too large, the self-locking force will be insufficient. The 30-75° range balances the ease of insertion and removal with the reliability of locking. Furthermore, the combination of the multi-lobed claw and the inclined angle of this invention allows for quick insertion and removal without additional tools, and the greater the external force, the stronger the locking force, i.e., self-locking and anti-pull-out, solving the problems of easy loosening and low efficiency of traditional screw fixing or straight-wall snap-fit.

[0010] Preferably, the angle between the claw and the horizontal plane is 55° to 65°.

[0011] More preferably, the angle between the claw and the horizontal plane is 60°.

[0012] After multiple tests of this invention, while the basic function can be achieved with an angle of 30-75° between the claw and the horizontal plane, repeated experiments have verified that 55-65° is the optimal range that balances "easy insertion" and "secure locking." When the angle is close to 55°, the insertion resistance is low, suitable for scenarios requiring frequent insertion and removal; when the angle is close to 65°, the self-locking force is stronger, suitable for environments with more vibration or external interference. This range, by refining the angle parameters, makes the device's performance more stable in different usage scenarios. For example, in low-vibration environments such as indoor lighting fixtures, an angle of around 55° can reduce assembly strength; in vibration scenarios such as vehicle lighting fixtures, an angle of around 65° can improve pull-out resistance and avoid connection failure due to vibration. The most preferred choice of 60° avoids the defect of vertical latches lacking self-locking and solves the problem of difficult insertion of small-angle latches, becoming one of the core technical highlights of this device.

[0013] In one embodiment of this utility model, the buckle portion includes four claw-shaped segments.

[0014] Structural advantages: The four-lobed jaws are evenly distributed circumferentially, providing more contact points and stronger locking stability compared to three-lobed jaws. Compared to 6-8 lobed jaws, the structure is simpler, easier to mold, and offers better deformation coordination during insertion and removal. Furthermore, the four-lobed design makes the fit clearance with the female fastener easier to control, evenly distributing external forces and avoiding localized stress concentration. For example, under radial torque, the four-lobed jaws can balance the force through symmetrically distributed contact points, preventing single-lobed jaws from breaking due to overload. This is particularly suitable for scenarios such as lighting fixture wiring where both torsional and pull-out resistance are required.

[0015] Furthermore, the female fastener includes an outer mold portion and an inner mold portion; the end of the inner mold portion is enlarged.

[0016] Preferably, the end of the inner mold portion is enlarged, and the edge of the enlarged portion is rounded.

[0017] The outer mold section primarily serves a protective function, preventing damage to the inner mold section from external impacts. The inner mold section is the core component that engages with the male fastener's locking mechanism. Its enlarged end design is key to achieving "pull-out prevention." When the female fastener is inserted, the claws engage with the enlarged portion of the inner mold section, forming a mechanical lock and preventing axial separation. The enlarged end of the inner mold section replaces the traditional straight-wall design of the fastener. Through the engagement of the enlarged structure with the claws, the pull-out resistance is significantly improved. For example, when the wire is accidentally pulled, the enlarged portion will prevent the claws from retracting, forming a double lock with the claws' tilt angle, thus solving the problem of traditional straight-wall fasteners being easily opened by external force.

[0018] The rounded corner design mainly solves two problems: First, it reduces frictional resistance during insertion. When the female fastener is inserted, the claws make smoother contact with the rounded corners, avoiding jamming or scratches caused by right-angled edges. Second, it reduces stress concentration. If the expansion area is a right angle, it is easy for cracks to occur during assembly due to stress concentration. The rounded corners can disperse stress and extend the service life of the female fastener.

[0019] In a preferred embodiment of this utility model, the outer wall of the inner mold portion is provided with at least one rib, and the width of the rib matches the gap between the claws.

[0020] More preferably, the outer wall of the inner mold portion is symmetrically provided with two ribs.

[0021] There is a gap between the claws of the male fastener. When the ribs of the female fastener are inserted into this gap, the relative rotation between the male and female fasteners is restricted. The number of ribs is designed to balance anti-rotation effectiveness with structural simplicity: one rib meets basic anti-rotation requirements, while three ribs are suitable for scenarios with extremely high anti-rotation requirements. Two ribs are symmetrically distributed circumferentially along the inner mold, allowing for uniform torque bearing within a 360° range. Symmetrical double ribs can meet anti-rotation requirements in most lighting scenarios. For example, in the wiring connections of outdoor streetlights, they effectively resist wire rotation caused by wind; in the installation of indoor downlights, they prevent wire twisting caused by adjusting the lamp angle, ensuring stable circuit connections.

[0022] Furthermore, the connection between the base and the latching part is provided with a plurality of reinforcing ribs, which extend axially. The connection between the base and the latching part is a weak point in the male fastener under stress; that is, the deformation of the latching part during insertion and removal will be transmitted to the base, which can easily lead to breakage at the connection over long-term use. The axial extension of the reinforcing ribs can improve the structural rigidity and distribute stress by increasing the cross-sectional thickness.

[0023] Preferably, the end of the buckle portion is provided with a guide radius. The guide radius allows it to fit better with the end expansion of the inner mold portion, reducing hard collisions with the inner mold portion. Especially during manual rapid assembly, even if the insertion angle is slightly off, the radius can play a corrective role, reducing the difficulty of operation.

[0024] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0025] The inclined angle design of the claws relative to the horizontal plane in this utility model allows the inclined surface to convert the external force into a radial self-locking force when the device is subjected to axial tension. The greater the tension, the stronger the locking force, fundamentally solving the problems of easy separation of traditional straight-walled buckles and easy stripping of screw threads. The enlarged end structure of the inner mold part forms a mechanical engagement with the claws, further enhancing the resistance to pull-out and adapting to vibration or external interference scenarios such as vehicle-mounted and outdoor applications. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the quick-connect device of this utility model in the inserted state.

[0027] Figure 2 This is another structural schematic diagram of the quick-connect device of this utility model in the inserted state.

[0028] Figure 3 This is a cross-sectional view of the quick-connect device of this utility model in the inserted state.

[0029] Figure 4 This is an exploded structural diagram of the quick-connect device of this utility model. Detailed Implementation

[0030] The accompanying drawings illustrate the technical solutions of this utility model in more detail. Throughout the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions. The described embodiments are only some, not all, of the embodiments of this utility model. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0031] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0032] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0033] Example 1

[0034] This embodiment provides a quick-connect device, such as... Figure 1As shown, it includes a female fastener 1 and a male fastener 2 that are inserted into each other;

[0035] Combination Figure 2 As shown, the male fastener 2 includes a base portion 21 and a snap-fit ​​portion 22; combined with Figure 3 and Figure 4 As shown, the latching part 22 includes four latching claws 10; the angle α between the latching claws 10 and the horizontal plane is 60°, and the latching claws 10 are engaged with the horizontal plane. Figure 4 As shown, the end of the latching part 22 is provided with a guide radius A, and a reinforcing rib 20 is provided at the connection between the base part 21 and the latching part 22. The reinforcing rib 20 extends axially, and the number of ribs matches the number of claws 10. The female fastener 1 includes an outer mold part 11 and an inner mold part 12; the end of the inner mold part 12 is enlarged, and the edge of the enlarged part is rounded. Two ribs 30 are symmetrically provided on the outer wall of the inner mold part 12.

[0036] Example 2

[0037] The difference between this embodiment and the previous embodiment is that the buckle part 22 in this embodiment includes three claws 10; the angle between the claws 10 and the horizontal plane is 75°, the outer wall of the inner mold part 12 is provided with one rib 30, and the number of reinforcing ribs 20 is three.

[0038] Example 3

[0039] The difference between this embodiment and the previous embodiment is that the buckle part 22 in this embodiment includes a 6-lobed claw 10; the angle between the claw 10 and the horizontal plane is 55°, the outer wall of the inner mold part 12 is provided with 3 ribs 30, and the number of reinforcing ribs 20 is 6.

[0040] Example 4

[0041] The difference between this embodiment and the previous embodiment is that the buckle part 22 in this embodiment includes 8-lobed claws 10; the angle between the claws 10 and the horizontal plane is 30°, and the number of reinforcing ribs 20 is 8.

[0042] The above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to the preferred embodiments above, those skilled in the art should understand that modifications or equivalent substitutions to the technical solution of this utility model should not depart from the spirit and scope of this utility model. Those skilled in the art can also make other changes within the spirit of this utility model for its design, as long as they do not deviate from the technical effect of this utility model. These changes made according to the spirit of this utility model should all be included within the scope of protection claimed by this utility model.

Claims

1. A quick-connect device, characterized in that, Includes a female fastener (1) and a male fastener (2) for insertion; The male fastener (2) includes a base portion (21) and a snap-fit ​​portion (22); the snap-fit ​​portion (22) includes a plurality of snap claws (10); the angle between the snap claws (10) and the horizontal plane is 30 to 75°.

2. The quick-connect device according to claim 1, characterized in that, The angle between the claw (10) and the horizontal plane is 60°.

3. The quick-connect device according to claim 1, characterized in that, The latching part (22) includes four-lobed latches (10).

4. The quick-connect device according to claim 1, characterized in that, The female fastener (1) includes an outer mold part (11) and an inner mold part (12); the end of the inner mold part (12) is enlarged.

5. The quick-connect device according to claim 4, characterized in that, The end of the inner mold part (12) is enlarged, and the edge of the enlarged part is rounded.

6. The quick-connect device according to claim 4, characterized in that, The outer wall of the inner mold part (12) is provided with at least one rib (30), the width of which matches the gap between the claws (10).

7. The quick-connect device according to claim 6, characterized in that, The outer wall of the inner mold part (12) is symmetrically provided with two ribs (30).

8. The quick-connect device according to claim 1, characterized in that, The connection between the base portion (21) and the buckle portion (22) is provided with a plurality of reinforcing ribs (20), which extend axially.

9. The quick-connect device according to claim 8, characterized in that, The number of reinforcing ribs is matched with the number of clamping claws.

10. The quick-connect device according to claim 1, characterized in that, The end of the buckle part (22) is provided with a guide rounded corner.

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