A strong snap-fit connector

Abstract

The utility model provides a strong elastic buckle connecting piece relates to furniture hardware technical field, it includes first connecting piece and second connecting piece, first connecting piece is used for embedding to first board spare, first connecting piece includes the stem body, stem expansion insert and expansion sleeve, the upper end of stem body is connected with stem expansion insert rotation through first connecting rod, expansion sleeve has elasticity and is set in first connecting rod and part stem expansion insert outside, second connecting piece is used for embedding to second board spare, second connecting piece includes expansion part and guide portion, is provided with lock cylinder in expansion part, the upper and lower surface of lock cylinder is through and its lateral wall has a gap, the lower part of expansion part has elasticity, guide portion has the notched and the sliding slot, the lower end of stem body is adapted to the notched and sliding slot from the notched is inclined. The utility model can realize fast, convenient installation, has higher stability simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of furniture hardware technology, and in particular to a concealed, high-strength spring-loaded connector. Background Technology

[0002] A connector is a connecting mechanism used in furniture. It is used to assemble the finished product by installing and locking it onto the pre-processed furniture substrate. Furniture on the market generally uses "three-in-one connectors" or "four-in-one connectors" to connect the panels. However, these methods leave visible holes (eccentric wheels) in the furniture, making the connectors partially or completely visible after assembly. This reduces the overall aesthetics and durability of the furniture, and limits its design flexibility and design possibilities.

[0003] Furniture production and sales are gradually trending towards a front-end sales, back-end manufacturing model. The factory processes the panels, which are then transported to the end consumer for assembly. In this model, economy and convenience are crucial factors to consider both the production and installation processes. Currently, furniture on the market uses "three-in-one connectors" to join panels, which cannot be pre-installed in the factory and must be tightened with screws on-site. This easily leads to problems such as missing, incorrectly installed, or damaged hardware. Since the installation site is often far from the factory, these issues result in very high after-sales costs. Furthermore, the cumbersome on-site installation significantly increases labor costs and can lead to a poor delivery experience for the end consumer.

[0004] Post-production furniture transportation is a crucial part of the delivery service. Using pre-assembled "three-in-one connectors" prevents the flat packaging of panels during transport, increasing transportation costs and the probability of panel damage. This hinders the establishment of the furniture factory's delivery system and is detrimental to improving production efficiency.

[0005] With the widespread adoption of online shopping and efficient furniture sales methods like IKEA, easy packaging, tool-free assembly, and standardized installation of furniture are becoming increasingly important. Traditional three-in-one connectors require a more cumbersome process, more tools, and more steps, which limits their effectiveness in this sales model. The industry trend demands a convenient, robust, tool-free, and quick-assembly connector product.

[0006] The current trend of furniture customization is sweeping the industry, and non-standard size customization and non-standard product production bring greater processing difficulties to furniture manufacturers. The process of assembling cabinets using traditional "three-in-one connectors" requires high precision in hole machining and panel dimensional accuracy. Errors can easily lead to uneven panel placement after cabinet assembly.

[0007] Furniture products often encounter special situations such as after-sales repairs after delivery to the end consumer. Furniture using "three-in-one connectors" to join panels requires disassembling the entire cabinet. In residential environments, cumbersome after-sales service can easily lead to dissatisfaction among end consumers. Therefore, the need for connectors that allow for the removal of individual panels is becoming increasingly important.

[0008] Furthermore, furniture or cabinets assembled and delivered using "three-in-one connectors" often experience loosening of the internal cam lock components after prolonged use, sometimes even detaching from the pre-drilled holes in the panels. This can cause the cabinet structure to become loose and wobbly. Such problems require frequent re-tightening of the cam locks, making furniture maintenance cumbersome and burdensome.

[0009] Currently, in the application of existing spring-loaded latch connectors, most connectors rely solely on compressible rod heads with a spring-loaded function. The process involves first pre-hammering the fitting into the panel, then typically placing the shelf with the spring-loaded latch in contact with the connecting nut on the side panel, and then pressing the other side of the shelf in. At this point, the spring rod head is compressed until it moves into the pre-embedded slot, at which point it springs back to its original position. However, in the high-end furniture market, cabinets often use processes such as baking paint, high-gloss finishes, and high-grade wood veneer for surface treatment. These surfaces are expensive and easily damaged. During the compression process of the spring rod head, the cabinet surface is subjected to pressure and friction from the spring rod head under relative force, making it highly susceptible to scratches or abrasions. Utility Model Content

[0010] To address the problems of cumbersome installation and insufficient stability in existing technologies, this utility model provides a powerful spring-loaded connector that enables quick and convenient installation while maintaining high stability.

[0011] To achieve the above objectives, this utility model provides the following technical solution:

[0012] A high-strength spring-loaded connector, comprising:

[0013] The first connector is used to be embedded in the first plate. The first connector includes a rod body, a rod expansion insert and an expansion sleeve. The upper end of the rod body is rotatably connected to the rod expansion insert through a first connecting rod. The expansion sleeve is elastic and is sleeved on the first connecting rod and part of the rod expansion insert.

[0014] The second connector is used to be embedded in the second plate. The second connector includes an expansion part and a guide part. A lock cylinder is provided in the expansion part. The upper and lower surfaces of the lock cylinder are connected and its side wall has a notch. The lower part of the expansion part is elastic. The guide part has a groove and a sliding groove. The groove is adapted to the lower end of the rod body. The sliding groove is inclined from the groove to the notch.

[0015] As described above, the high-strength spring-loaded connector further includes a rod expansion insert with a larger upper portion and a smaller lower portion. The outer surface of the rod expansion insert has an inclined portion. The expansion sleeve is fitted onto the lower part of the rod expansion insert. A first ramp is provided inside the expansion sleeve, pointing downwards and inclined towards the central axis of the expansion sleeve. The first ramp matches the inclined portion. The rod expansion insert has a first threaded hole penetrating its upper and lower surfaces. The outer surface of the first connecting rod has a first thread, which engages with the first threaded hole. The lower end of the first connecting rod has an outwardly protruding protrusion that abuts against the lower end of the expansion sleeve. The first connecting rod has a first through hole penetrating its upper and lower surfaces. An inwardly protruding limiting step is provided within the first through hole. The upper end of the rod has a limiting head that abuts against the limiting step. A limiting block is provided on the outer surface of the rod expansion insert, and a limiting groove is provided on the expansion sleeve, which matches the limiting block.

[0016] As described above, the high-strength snap fastener further includes a second thread on the outer surface of the lock cylinder, a second threaded hole in the expansion portion, the second thread being adapted to the second threaded hole, and a second ramp at the lower part of the second threaded hole, the second ramp being downward and inclined toward the central axis of the expansion portion.

[0017] As described above, the high-strength spring-loaded connector further includes a detachably connected upper and lower rod body. The upper rod body has a limiting head at its upper end and a third thread at its lower end. The lower rod body has a third threaded hole at its upper end, which is adapted to the third thread. The lower end of the lower rod body is connected to a rod head via a second connecting rod. The diameter of the second connecting rod gradually decreases from the lower rod body towards the rod head. The rod head is elliptical and has a cross groove. The upper surface of the expansion part has two protrusions that are arc-shaped and elastic. The two protrusions face horizontally towards the groove. A traction ramp is provided below the protrusions. The distance between the two protrusions is less than the diameter of the second connecting rod.

[0018] The high-strength spring-loaded connector described above further includes a first spring. The upper end of the lower rod body is provided with six grooves on each side. The third threaded hole is provided in each of the six grooves. A six-sided locking block is provided in each of the six grooves. The six-sided locking block is provided with a second through hole that penetrates its upper and lower surfaces. The second through hole is adapted to the upper rod body. The first spring is sleeved on the upper rod body, and the two ends of the first spring abut against the lower surface of the first connecting rod and the upper surface of the six-sided locking block, respectively.

[0019] The high-strength spring-loaded connector described above further includes a second spring. The rod head is made of metal. The upper end of the lower rod body has six grooves on each side. The third threaded hole is provided in each of the six grooves. A six-sided locking block is provided in each of the six grooves. The six-sided locking block has a second through hole that penetrates its upper and lower surfaces. The second through hole is adapted to the upper rod body. The second spring is sleeved on the upper rod body, and the two ends of the second spring abut against the lower surface of the first connecting rod and the upper surface of the six-sided locking block, respectively. A magnetic block is provided in the bottom surface of the sliding groove, and the magnetic block can attract the rod head.

[0020] As described above, the high-strength snap fastener further includes a hollow outer shell. The upper end of the outer shell has a fourth threaded hole, and the lower part of the expansion sleeve has a fourth thread that matches the fourth threaded hole. The diameter of the lower opening of the outer shell is smaller than the diameter of the lower rod. The lower surface of the outer shell has a first slot, and the outer surface of the outer shell has a rod self-tapping thread. The upper end of the outer shell has a first anti-reverse tooth, and the lower end of the expansion sleeve has a second anti-reverse tooth. The first anti-reverse tooth matches the second anti-reverse tooth.

[0021] As described above, the high-strength snap fastener further includes a multi-layered toothed anti-reverse tooth on the outer surface of the expansion sleeve, with a bending notch in the middle of the multi-layered toothed anti-reverse tooth, a first reverse tooth on the outer surface of the expansion part, and a second reverse tooth on the outer surface of the guide part.

[0022] As described above, the high-strength spring-loaded connector further includes a lock cylinder that is threadedly connected to the expansion portion, and a second slot is provided on the upper surface of the lock cylinder.

[0023] In the aforementioned high-strength snap fastener, the upper surface of the guide portion is flush with the upper surface of the expansion portion, and the depth of the guide portion is less than the depth of the expansion portion, and the diameter of the guide portion is less than the diameter of the expansion portion.

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

[0025] 1. This utility model uses a first connector and a second connector to expand and fix the two plates to be installed, and then the lower end of the rod can be inserted into the slot and slid to complete the installation, which is convenient and stable.

[0026] 2. This utility model uses a shorter second spring, which allows the rod head to retract completely into the outer shell without any elasticity. When the rod head is placed on the inner groove of the second connector, the magnetic block on the groove will pull the rod head out through magnetic force, thereby avoiding the problem of scratches on the surface of the high-end cabinet.

[0027] 3. After the two plates are installed, the hardware of the first and second connectors of this utility model is not exposed, which improves the overall aesthetics. At the same time, it has the characteristics of lightweight processing, high installation efficiency, and repeated disassembly and reassembly.

[0028] 4. The anti-reverse teeth on the outer surface of the expansion sleeve, the reverse teeth on the outer surface of the expansion part and the guide part of this utility model further increase the friction between it and the inner wall of the board substrate, which greatly improves the stability of the connection between it and the board. The accessories are difficult to come out after installation, so that the two boards can be stably installed, and the furniture assembly is more secure.

[0029] 5. The first and second connectors of this utility model trigger expansion within their respective plates to be installed, giving the plates stronger friction and nail-holding force. At the same time, their strong stability has the function of tightening and correcting the plates when the dimensional error or deformation of the plates is large. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a structural schematic diagram of the high-strength spring-loaded connector in an embodiment of this utility model;

[0032] Figure 2 This is a front view of the first connecting member (containing a first spring) in an embodiment of this utility model;

[0033] Figure 3 for Figure 2 Cross-sectional view at point AA;

[0034] Figure 4 This is a bottom view of the first connecting member in an embodiment of this utility model;

[0035] Figure 5 This is an exploded view of the structure of the first connecting member (containing a first spring) in an embodiment of this utility model;

[0036] Figure 6 This is a top view of the second connector (with a built-in lock cylinder) in an embodiment of this utility model;

[0037] Figure 7 for Figure 6 Cross-sectional view at BB;

[0038] Figure 8This is a top view of the second connector (without a built-in lock cylinder) in an embodiment of this utility model;

[0039] Figure 9 for Figure 8 Cross-sectional view at CC;

[0040] Figure 10 This is an exploded view of the structure of the second connector (slide groove without built-in magnetic block) in this embodiment of the present invention;

[0041] Figure 11 This is a front view of the first connecting member (containing a second spring) in an embodiment of this utility model;

[0042] Figure 12 for Figure 11 Cross-sectional view at DD;

[0043] Figure 13 This is an exploded view of the structure of the first connecting member (containing a second spring) in an embodiment of this utility model;

[0044] Figure 14 This is a top view of the second connector (with a built-in lock cylinder and a magnetic block built into the slide groove) in an embodiment of the present utility model.

[0045] Figure 15 for Figure 14 Sectional view at EE;

[0046] Figure 16 This is a top view of the second connector (without a built-in lock cylinder and with a magnetic block built into the slide groove) in an embodiment of this utility model.

[0047] Figure 17 for Figure 16 Cross-sectional view at FF;

[0048] Figure 18 This is an exploded view of the structure of the second connector (with a magnetic block built into the slide) in this embodiment of the present invention;

[0049] Figures 19 to 20 This is a schematic diagram showing the expansion of the first connecting member (containing a first spring) in an embodiment of this utility model;

[0050] Figure 21 for Figure 19 Cross-sectional view;

[0051] Figure 22 for Figure 20 Cross-sectional view;

[0052] Figures 23 to 24 This is a schematic diagram showing the expansion of the second connector (slide groove without built-in magnetic block) in an embodiment of this utility model;

[0053] Figure 25 for Figure 23 Cross-sectional view;

[0054] Figure 26 for Figure 24 Cross-sectional view;

[0055] Figures 27 to 29 This is a schematic diagram of the installation of the first connector and the second connector (spring pop-out) in an embodiment of this utility model;

[0056] Figure 30 for Figure 27 Cross-sectional view;

[0057] Figure 31 for Figure 28 Cross-sectional view;

[0058] Figure 32 for Figure 29 Cross-sectional view;

[0059] Figures 33 to 34 This is a schematic diagram showing the expansion of the first connecting member (containing a second spring) in an embodiment of this utility model;

[0060] Figure 35 for Figure 33 Cross-sectional view;

[0061] Figure 36 for Figure 34 Cross-sectional view;

[0062] Figures 37 to 38 This is a schematic diagram showing the expansion of the second connector (with a magnetic block built into the slide) in an embodiment of this utility model.

[0063] Figure 39 for Figure 37 Cross-sectional view;

[0064] Figure 40 for Figure 38 Cross-sectional view;

[0065] Figures 41 to 44 This is a schematic diagram of the installation of the first connector and the second connector (magnetic block adsorption) in an embodiment of this utility model;

[0066] Figure 45 for Figure 41 Cross-sectional view;

[0067] Figure 46 for Figure 42 Cross-sectional view;

[0068] Figure 47 for Figure 43 Cross-sectional view;

[0069] Figure 48 for Figure 44 Cross-sectional view;

[0070] Figures 49 to 51 This is a schematic diagram of the installation of the first plate and the second plate (spring pop-out) in an embodiment of this utility model;

[0071] Figures 52 to 54 This is a schematic diagram of the installation of the first plate and the second plate (magnetic block adsorption) in an embodiment of this utility model;

[0072] In the diagram: 1. First connector; 2. Second connector; 3. Rod expansion insert; 4. Expansion sleeve; 5. Expansion part; 6. Guide part; 7. First connecting rod; 8. Lock cylinder; 9. Notch; 10. Groove; 11. Slide groove; 12. First threaded hole; 13. First thread; 14. First through hole; 15. Limiting step; 16. Limiting head; 17. Inclined part; 18. First ramp; 19. Limiting block; 20. Limiting groove; 21. Second thread; 22. Second threaded hole; 23. First spring; 24. Second ramp; 25. Upper rod body; 26. Lower rod body; 27. Third thread; 28. 29. Three-threaded hole; 30. Second connecting rod; 31. Rod head; 32. Cross groove; 33. Boss; 34. Second spring; 35. Six-sided groove; 36. Six-sided locking block; 37. Second through hole; 38. Outer shell; 39. First anti-reverse tooth; 40. Second anti-reverse tooth; 41. Rod self-tapping thread; 42. First reverse tooth; 43. Second reverse tooth; 44. Magnetic block; 45. Bending notch; 46. Traction slope; 47. First slot; 48. Second slot; 49. Anti-reverse reverse tooth; 50. Fourth thread; 51. Fourth threaded hole; 52. First plate; 53. Second plate; 54. Boss. Detailed Implementation

[0073] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0074] Example:

[0075] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, in the embodiments of this utility model are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.

[0076] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" 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 utility model 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 utility model.

[0077] In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" 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 utility model based on the specific circumstances.

[0078] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0079] This utility model provides a technical solution: a powerful spring-loaded connector, which includes a first connector 1 and a second connector 2. The first connector 1 is embedded in a first plate 51 and includes a rod body, a rod expansion insert 3 and an expansion sleeve 4. The upper end of the rod body is rotatably connected to the rod expansion insert 3 through a first connecting rod 7. The expansion sleeve 4 is elastic and is fitted outside the first connecting rod 3 and part of the rod expansion insert 3. The second connector 2 is embedded in a second plate 52 and includes an expansion part 5 and a guide part 6. A lock core 8 is provided in the expansion part 5. The upper and lower surfaces of the lock core 8 are connected and its side wall has a notch 9. The lower part of the expansion part 5 is elastic. The guide part 6 has a groove 10 and a sliding groove 11. The groove 10 is adapted to the lower end of the rod body, and the sliding groove 11 is inclined from the groove 10 to the notch 9.

[0080] Specifically, see Figure 1 as well as Figures 20 to 30 The first connector 1 and the second connector 2 are respectively installed in the two plates (first plate 51 and second plate 52) that need to be spliced. When splicing the two plates, expansion is completed in each plate before snapping them together. The expansion of the first connector 1 is achieved by rotating the rod body, which causes the first connecting rod 7 to rotate, thereby driving the rod expansion insert 3 towards the expansion sleeve 4, thus opening the expansion sleeve 4. The expansion of the second connector 2 is achieved by moving the lock cylinder 8 towards the lower part of the expansion part 5, thereby opening the lower part of the expansion part 5. After the first connector 1 and the second connector 2 have both completed expansion, the lower end of the rod body is inserted into the slot 10, allowing it to slide along the slide groove 11 towards the notch 9 and enter the lock cylinder 8 for snapping. Therefore, this strong spring-loaded connector requires pre-expansion in the installed plates before snapping the first connector 1 and the second connector 2 together, which is quite convenient. At the same time, the two plates have high stability after installation.

[0081] As an optional implementation, in some embodiments, the first connector 1 further includes a hollow outer shell 37. The upper end of the outer shell 37 is provided with a fourth threaded hole 50, and the lower part of the expansion sleeve 4 is provided with a fourth thread 49. The fourth thread 49 is adapted to the fourth threaded hole 50. The diameter of the lower end opening of the outer shell 37 is smaller than the diameter of the lower rod 26. The lower surface of the outer shell 37 is provided with a first slot 46. The outer surface of the outer shell 37 is provided with a rod self-tapping thread 40. The upper end of the outer shell 37 is provided with a first anti-reverse tooth 38, and the lower end of the expansion sleeve 4 is provided with a second anti-reverse tooth 39. The first anti-reverse tooth 38 and the second anti-reverse tooth 39 are adapted to each other.

[0082] Specifically, see again Figures 2 to 4The first anti-reverse tooth 38 and the second anti-reverse tooth 39 have the same tooth shape (both are triangular teeth) and number of teeth. When the outer shell 37 and the expansion sleeve 4 are screwed together, the meshing between the first anti-reverse tooth 38 and the second anti-reverse tooth 39 can effectively prevent the two from rotating relative to each other, making it impossible for them to be loosened. At the same time, the threaded connection is also locked to the end, forming a tight engagement, and the two can no longer move forward or backward relative to each other. Similarly, during the installation of the first connector 1, a matching flathead screwdriver is used to screw the self-tapping thread 40 of the first connector mating rod into the preset mounting hole of the first plate 49 through the first flathead slot 46 on the lower surface of the outer shell 37. The anti-reverse effect of the first anti-reverse tooth 38 and the second anti-reverse tooth 39 prevents the expansion sleeve 4 from not rotating with the outer shell 37 in the preset mounting hole, thus preventing it from falling off.

[0083] In the above embodiments, further, the outer surface of the expansion sleeve 4 is provided with multi-layered toothed anti-retraction teeth 48, and a bending notch 44 is provided in the middle of the multi-layered toothed anti-retraction teeth 48; the outer surface of the expansion part 5 is provided with first teeth 41; and the outer surface of the guide part 6 is provided with second teeth 42. See again... Figure 3 and Figure 7 The anti-reverse teeth 48 can work in conjunction with the expansion sleeve 4 to form a more stable expansion self-locking within the first plate 51. Similarly, the first reverse teeth 41 and the second reverse teeth 42 can form a more stable expansion self-locking within the second plate 52 with the expansion portion 5 and the guide portion 6. In addition, the bending notch 44 can reserve a releasable space for the annular expansion of the upper part.

[0084] As an optional implementation, in some embodiments, the rod expansion insert 3 is shaped with a larger upper part and a smaller lower part. The outer surface of the rod expansion insert 3 has an inclined portion 17. The expansion sleeve 4 is fitted onto the lower part of the rod expansion insert 3. A first ramp 18 is provided inside the expansion sleeve 4. The first ramp 18 is downward and inclined towards the central axis of the expansion sleeve 4. The first ramp 18 is adapted to the inclined portion 17. The rod expansion insert 3 has a first threaded hole 12 that penetrates its upper and lower surfaces. The outer surface of the first connecting rod 7 is provided with a first thread 13. 13 is threaded into the first threaded hole 12. The lower end of the first connecting rod 7 has an outwardly protruding protrusion 53, which abuts against the lower end of the expansion sleeve 4. The first connecting rod 7 has a first through hole 14 that penetrates its upper and lower surfaces. The first through hole 14 has an inwardly protruding limiting step 15. The upper end of the rod has a limiting head 16, which abuts against the limiting step 15. The outer surface of the rod expansion plug 3 is provided with a limiting block 19. The expansion sleeve 4 is provided with a limiting groove 20, which is adapted to the limiting block 19.

[0085] Specifically, see Figure 2 and Figure 5Because the outer periphery of the rod body is hexagonal, and the first through hole 14 inside the first connecting rod 7 is also a matching hexagonal, when the rod body rotates, it will drive the first connecting rod 7 to rotate. Since the lower end of the first connecting rod 7 has a protrusion 53, the diameter of which is larger than the body of the first connecting rod 7, and the protrusion 53 abuts against the lower end of the expansion sleeve 4 and is supported and limited, the first connecting rod 7 has no space to fall downwards. At this time, the first thread 13 on the outer surface of the first connecting rod 7 engages with the first threaded hole 12 of the rod expansion plug 3, and the interaction force between the threads will drive the rod expansion plug 3 to move downwards, thereby achieving the effect of the rod expansion plug 3 opening the expansion sleeve 4. In addition, the first ramp 18 and the inclined part 17 have the same inclination. Since the shape of the rod expansion plug 3 is larger at the top and smaller at the bottom, and the expansion sleeve 4 is elastic, when the rod expansion plug 3 moves downwards, the expansion sleeve 4 can be opened by the cooperation of the inclined part 17 of the rod expansion plug 3 and the first ramp 18 of the expansion sleeve 4. The limiting block 19 and the limiting groove 20 work together to connect the rod expansion insert 3 and the expansion sleeve 4 into a single unit. Since the top of the expansion sleeve 4 is tightened with the first thread 13 and the first anti-reverse tooth 38 of the outer shell, the expansion sleeve 4 cannot rotate further, and consequently, the rod expansion insert 3 cannot rotate further. When the rod rotates, causing the first connecting rod 7 to rotate, the rod expansion insert 3 will be subjected to a pulling force from the screw threads, causing the rod expansion insert 3 to move inwards towards the expansion sleeve 4, thus expanding and opening it. The overall structural design is simple and ingenious.

[0086] As an optional implementation, in some embodiments, the outer surface of the lock cylinder 8 is provided with a second thread 21, the expansion portion 5 has a second threaded hole 22, the upper part of the second threaded hole 22 is provided with an internal thread 23, the second thread 21 is adapted to the internal thread 23, and the lower part of the second threaded hole 22 is provided with a second ramp 24, the second ramp 24 is downward and inclined toward the central axis of the expansion portion 5. See also... Figures 6 to 9 Since the lower part of the expansion part 5 is elastic and the lower part of the second threaded hole 22 has a second slope 24, when the lock cylinder 8 is threadedly connected to the second threaded hole 22, the lock cylinder 8 moves downward to the second slope 24, which pushes the inwardly inclined second slope 24 outward, thereby realizing the expansion of the lower part of the expansion part 5.

[0087] As an optional implementation, in some embodiments, the rod body includes a detachably connected upper rod body 25 and lower rod body 26. The upper end of the upper rod body 25 has a limiting head 16, and the lower end of the upper rod body 25 has a third thread 27. The upper end of the lower rod body 26 has a third threaded hole 28, which is adapted to the third thread 26. The lower end of the lower rod body 26 is connected to a rod head 30 through a second connecting rod 29. The diameter of the second connecting rod 29 gradually decreases from the lower rod body 26 towards the rod head 30. The rod head 30 is elliptical and has a cross groove 31. The upper surface of the expansion part 5 is provided with two protrusions 32. The two protrusions 32 are arc-shaped and elastic. The two protrusions 32 are horizontally oriented towards the groove 10. A traction slope 45 is provided below the protrusions 32. The distance between the two protrusions 32 is smaller than the diameter of the second connecting rod 29.

[0088] Specifically, see again Figures 2 to 10The rod is detachable and consists of an upper rod 25 and a lower rod 26. The middle part of the upper rod 25 is a hexagonal prism, and the lower opening of the first through hole 14 of the first connecting rod 7 connected to the upper rod 25 is also hexagonal. This allows for a large contact area and good fit between the two parts. When the rod rotates, the two parts can rotate as a whole, thereby improving transmission efficiency. The upper rod 25 and the lower rod 26 are fixed by a threaded connection, which is simple and stable. The rod head 30 is elliptical and has a certain thickness. The lower rod 26 fits tightly against the inner wall of the outer shell 37 with very little gap. This results in uneven distribution of the contact surface with the slide groove 11 in different directions. During sliding, the contact between the major and minor axes of the ellipse and the slide groove wall makes the guiding effect of the slide groove 11 wall more efficient, thus making the sliding process smoother. On the other hand, the first connector 1 is securely locked inside the second connector 2, preventing wobbling and ensuring the cabinet shelves are more stable after installation. Simultaneously, the elliptical rod head 30 has a relatively large contact area with the groove 11, allowing for more even stress distribution on the contact surface under load, thus reducing the risk of localized stress concentration. Furthermore, the diameter of the second connecting rod 29 gradually decreases from the lower rod body 26 towards the rod head 30, limiting the outward extension length of the connecting rod 29. The rod head 30 has a cross-shaped groove 31 with four openings, allowing for tightening with a screwdriver. Additionally, the distance between the two bosses 32 is slightly smaller than the diameter of the second connecting rod 29. Since both bosses 24 are elastic, when the second connecting rod 29 slides between the two bosses 32, the external force causes elastic deformation of the two bosses 32, allowing the second connecting rod 29 to pass through. On the other hand, after the second connecting rod 29 passes the two rear protrusions 32, the two protrusions 32 return to their original state, forming a narrow channel behind the second connecting rod 29. Without a certain degree of external force, the second connecting rod 29 cannot return on its own, thus preventing children from accidentally disassembling the plate and increasing the stability of the installation. Furthermore, after the second connecting rod 29 passes the two rear protrusions 32, the traction ramps 45 on both sides of the slide groove act as guides, allowing the rod head 30 to smoothly reach the lock cylinder 8.

[0089] As an optional implementation, in some embodiments, a first spring 23 is also included. The upper end of the lower rod 26 is provided with a six-sided groove 34. A third threaded hole 28 is provided in the six-sided groove 34. A six-sided locking block 35 is provided in the six-sided groove 34. The six-sided locking block 35 is provided with a third through hole 36 that penetrates its upper and lower surfaces. The third through hole 36 is adapted to the upper rod 25. The first spring 23 is sleeved on the upper rod 25, and the two ends of the first spring 23 abut against the lower surface of the first connecting rod 7 and the upper surface of the six-sided locking block 35, respectively.

[0090] Specifically, see again Figures 11 to 18 The six-sided locking block 35 is hexagonal prism in shape, and the third through hole 36 is circular. Since the lower end of the upper rod 25 is cylindrical and the second threaded hole 28 of the lower rod is also circular, they are screwed together. Above the lower rod 26, there is a six-sided groove 34, the size of which matches the six-sided locking block 35. After the upper rod 25 and lower rod 26 are screwed together, the six-sided locking block 35 falls into the six-sided groove 34. Therefore, in applications where the rod rotates, the six-sided locking block 35 can cause the lower rod 26 to drive the upper rod 25 to rotate together, while also providing simultaneous forward and reverse relative positioning of the upper rod 25 and lower rod 26, ensuring that the threaded connection between the lower rod 26 and upper rod 25 will not loosen in any possible application scenarios. When installing the plate, the first spring 23 undergoes elastic deformation under the pressure of another plate, causing the rod head 30 to retract into the outer casing 37. When the rod head 30 falls into the slot 10 of the second connector 2, the external force disappears, and the elastic force of the first spring 23 causes the upper rod body 25 to move upward and reset, and the rod head 30 extends.

[0091] Therefore, in this embodiment, the length of the second spring 33 is shortened so that the rod head 30 can be fully and freely retracted into the outer shell 37 without any elasticity. When the rod head 30 is placed on the inner slide groove 11 of the second connector 2, the magnetic block 43 on the slide groove 11 will extend the rod head 30 through magnetic force. This solution avoids the problem of scratches on the surface of the high-end cabinet.

[0092] As an optional implementation, in some embodiments, a second spring 33 is also included. The rod head 30 is made of metal. The upper end of the lower rod body 26 is provided with a six-sided groove 34. A third threaded hole 28 is provided in the six-sided groove 34. A six-sided locking block 35 is provided in the six-sided groove 34. The six-sided locking block 35 has a third through hole 36 that penetrates its upper and lower surfaces. The third through hole 36 is adapted to the upper rod body 25. The first spring 23 is sleeved on the upper rod body 25, and the two ends of the first spring 23 abut against the lower surface of the first connecting rod 7 and the upper surface of the six-sided locking block 35, respectively. A magnetic block 43 is provided in the bottom surface of the slide groove 11. The magnetic block 43 can attract the rod head 30. See also Figure 11 The difference from the above embodiment is that the second spring 33 is shorter than the first spring 23, so that when the second spring 33 is in the fully released state, the rod head 30 can be completely retracted into the outer shell 37. The second spring 33 only serves as a support component. At the same time, a magnetic block 43 is provided in the bottom surface of the slide groove 11. Since the rod head 30 is made of metal, it can be fully retracted into the outer shell 37 during the installation of the plate, avoiding scratches and damage to the plate surface due to relative external force. When the rod head 30 slides to a certain point on the surface of the slide groove 11 (above the magnetic block 43), it will be attracted out by the magnetic block 43. This embodiment replaces the spring pop-out design of the above embodiment with a magnetic design, making the overall design more ingenious and easier to use.

[0093] As an optional implementation, in some embodiments, the lock cylinder 8 is threadedly connected to the expansion portion 5, and a second slot 47 is formed on the upper surface of the lock cylinder 8. See again... Figure 10 The lock cylinder 8 and the expansion part 5 are fixed by a threaded connection. The lock cylinder 8 can be screwed into the expansion part 5 by using a matching flathead screwdriver corresponding to the second flathead slot 47. When the lock cylinder 8 is tightened in place, the notch 9 of the lock cylinder 8 is facing the two bosses 24 and is also facing the traction slope 45.

[0094] As an optional implementation, in some embodiments, the upper surface of the guide portion 6 is flush with the upper surface of the expansion portion 5, and the depth of the guide portion 6 is less than the depth of the expansion portion 5, and the diameter of the guide portion 6 is less than the diameter of the expansion portion 5. See again... Figure 6 and Figure 11 Because the depth of the guide part 6 is less than the depth of the expansion part 5, the lower part of the expansion part 5 can expand outwards without obstruction, which improves stability. Furthermore, the diameter of the guide part 6 is smaller than the diameter of the expansion part 5, preventing on-site installers from knocking the parts in the wrong direction. At the same time, the larger diameter of the expansion part 5 results in a larger anti-reverse tooth area, leading to stronger expansion locking force and friction.

[0095] One method for installing and using this high-strength spring-loaded connector: See [link / description]. Figures 19 to 29 as well as Figures 49 to 51 First, pre-drill mounting holes in the two plates to be installed. Then, install the first connector and the second connector into the corresponding mounting holes. Next, expand the first connector and the second connector separately (first connector: use a bolt cutter to rotate the cross groove on the rod head, and the upper rod body will drive the first connecting rod to rotate, thereby causing the rod expansion insert to move towards the expansion sleeve, thus opening the expansion sleeve; second connector: use a bolt cutter to rotate the second slot, causing the lock cylinder to move towards the lower part of the expansion part, thereby opening the lower part of the expansion part). After the expansion is completed, place the first plate with the first connector installed close to the second plate with the second connector installed, so that the rod head is aligned with the slot, and apply force to make the lower end of the rod slide along the groove until the two plates are aligned and assembled. At this time, the lower end of the rod will be locked and fixed at the lock cylinder. As can be clearly seen from the diagram, when using this high-strength spring-loaded connector to install two panels, the first and second connectors are not exposed after installation, and the mounting holes of the two panels are also invisible, achieving a completely concealed effect for the connectors and mounting holes, greatly improving the overall aesthetics. Furthermore, its strong stability and internal pull-out force can tighten and correct the panels when there are large dimensional errors or deformations.

[0096] Another method for installing and using this strong spring-loaded connector: See Figures 30 to 48 as well as Figures 52 to 54 First, pre-drill mounting holes in the two plates to be installed. Then, install the first connector and the second connector into the corresponding mounting holes. Next, expand the first connector and the second connector separately (first connector: the second spring is shorter than the first spring, so the rod head can extend and retract freely, retracting into the outer shell without being affected by the spring force. Use a bolt cutter to rotate the cross groove on the rod head, and the first connecting rod will rotate through the upper rod body transmission, thereby causing the rod expansion insert to move towards the expansion sleeve, thus opening the expansion sleeve; second connector: use a bolt cutter to rotate the second slot, causing the lock cylinder to move towards the lower part of the expansion part, thereby opening the lower part of the expansion part). After the expansion is completed, place the first plate with the first connector installed close to the second plate with the second connector installed, so that the rod head is aligned with the slot and fits. The rod head will be attracted out by the magnetic block. Continue to apply force and push until the two plates are aligned and assembled. At this time, the lower end of the rod will be locked and fixed at the lock cylinder. As can be clearly seen from the diagram, when using this high-strength spring-loaded connector to install two panels, the first and second connectors are not exposed after installation, and the mounting holes of the two panels are also invisible, achieving a completely concealed effect for the connectors and mounting holes, greatly improving the overall aesthetics. Furthermore, its strong stability and internal pull-out force can tighten and correct the panels when there are large dimensional errors or significant deformations.

[0097] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0098] The above embodiments are merely illustrative of the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made based on the substance of the content of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A high-strength spring-loaded connector, characterized in that, include: The first connector is used to be embedded in the first plate. The first connector includes a rod body, a rod expansion insert and an expansion sleeve. The upper end of the rod body is rotatably connected to the rod expansion insert through a first connecting rod. The expansion sleeve is elastic and is sleeved on the first connecting rod and part of the rod expansion insert. The second connector is used to be embedded in the second plate. The second connector includes an expansion part and a guide part. A lock cylinder is provided in the expansion part. The upper and lower surfaces of the lock cylinder are connected and its side wall has a notch. The lower part of the expansion part is elastic. The guide part has a groove and a sliding groove. The groove is adapted to the lower end of the rod body. The sliding groove is inclined from the groove to the notch.

2. The high-strength spring-loaded connector according to claim 1, characterized in that, The rod expansion insert is shaped with a larger upper part and a smaller lower part. The outer surface of the rod expansion insert has an inclined portion. The expansion sleeve is fitted onto the lower part of the rod expansion insert. A first ramp is provided inside the expansion sleeve, sloping downwards and towards the central axis of the expansion sleeve. The first ramp matches the inclined portion. The rod expansion insert has a first threaded hole penetrating its upper and lower surfaces. The outer surface of the first connecting rod has a first thread, which engages with the first threaded hole. The lower end of the first connecting rod has an outwardly protruding protrusion that abuts against the lower end of the expansion sleeve. The first connecting rod has a first through hole penetrating its upper and lower surfaces, with an inwardly protruding limiting step inside the first through hole. The upper end of the rod has a limiting head that abuts against the limiting step. A limiting block is provided on the outer surface of the rod expansion insert, and a limiting groove is provided on the expansion sleeve, matching the limiting block.

3. The high-strength spring-loaded connector according to claim 1, characterized in that, The outer surface of the lock cylinder is provided with a second thread, and the expansion part has a second threaded hole. The second thread is adapted to the second threaded hole, and a second slope is provided at the lower part of the second threaded hole. The second slope is downward and inclined toward the central axis of the expansion part.

4. The high-strength spring-loaded connector according to claim 1, characterized in that, The rod body includes a detachably connected upper rod body and a lower rod body. The upper end of the upper rod body has the limiting head, and the lower end of the upper rod body has a third thread. The upper end of the lower rod body has a third threaded hole, which is adapted to the third thread. The lower end of the lower rod body is connected to a rod head through a second connecting rod. The diameter of the second connecting rod gradually decreases from the lower rod body towards the rod head. The rod head is elliptical and has a cross groove. The upper surface of the expansion part is provided with two protrusions. The two protrusions are arc-shaped and elastic. The two protrusions are horizontally oriented towards the groove. A traction slope is provided below the protrusions. The distance between the two protrusions is less than the diameter of the second connecting rod.

5. The high-strength spring-loaded connector according to claim 4, characterized in that, It also includes a first spring, and the upper end of the lower rod body is provided with six grooves on each side. The third threaded hole is provided in each of the six grooves. A six-sided locking block is provided in each of the six grooves. The six-sided locking block is provided with a second through hole that penetrates its upper and lower surfaces. The second through hole is adapted to the upper rod body. The first spring is sleeved on the upper rod body, and the two ends of the first spring abut against the lower surface of the first connecting rod and the upper surface of the six-sided locking block, respectively.

6. The high-strength spring-loaded connector according to claim 4, characterized in that, It also includes a second spring. The rod head is made of metal. The upper end of the lower rod body has six grooves on each side. The third threaded hole is opened in each of the six grooves. A six-sided locking block is provided in each of the six grooves. The six-sided locking block has a second through hole that penetrates its upper and lower surfaces. The second through hole is adapted to the upper rod body. The second spring is sleeved on the upper rod body, and the two ends of the second spring abut against the lower surface of the first connecting rod and the upper surface of the six-sided locking block, respectively. A magnetic block is provided in the bottom surface of the sliding groove. The magnetic block can attract the rod head.

7. The high-strength spring-loaded connector according to claim 1, characterized in that, The first connector also includes a hollow outer shell, the upper end of which has a fourth threaded hole, the lower part of which has a fourth thread, the fourth thread being adapted to the fourth threaded hole, the diameter of the lower opening of the outer shell being smaller than the diameter of the lower rod, the lower surface of the outer shell having a first slot, the outer surface of the outer shell having a rod self-tapping thread, the upper end of the outer shell having a first anti-reverse tooth, the lower end of the expansion sleeve having a second anti-reverse tooth, the first anti-reverse tooth being adapted to the second anti-reverse tooth.

8. The high-strength spring-loaded connector according to claim 1, characterized in that, The outer surface of the expansion sleeve is provided with multiple layers of toothed anti-reverse teeth, and a bending notch is provided in the middle of the multiple layers of toothed anti-reverse teeth. The outer surface of the expansion part is provided with a first reverse tooth, and the outer surface of the guide part is provided with a second reverse tooth.

9. The high-strength spring-loaded connector according to claim 1, characterized in that, The lock cylinder is threadedly connected to the expansion part, and a second slot is provided on the upper surface of the lock cylinder.

10. The high-strength spring-loaded connector according to claim 1, characterized in that, The upper surface of the guide portion is flush with the upper surface of the expansion portion, and the depth of the guide portion is less than the depth of the expansion portion, and the diameter of the guide portion is less than the diameter of the expansion portion.

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