An expansion lock lever

Abstract

The utility model provides a kind of expansion type lock rod, it is related to furniture hardware technical field, it includes stem head and expansion sleeve, expansion sleeve has connecting end and expansion end, connecting end is connected with the connecting end of stem head by connecting shell, expansion end has elasticity, expansion end is equipped with slot, the spigot of slot is connected with extrusion block by first connecting strip, and first connecting strip has plasticity;Wherein, drive extrusion block to move in the direction of spigot and make it be inserted in slot, so that expansion end expands outwardly.The utility model can also improve expansion efficiency while being integrally arranged.

Description

Technical Field

[0001] This utility model relates to the field of furniture hardware technology, and in particular to an expansion lock rod. 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. To address this issue of installation stability, expansion components are used. However, current expansion components have separate components, lack limiting components, are prone to scattering or loss, have low expansion efficiency, and can easily cause the lock rod to break off and become stuck in the panel holes during disassembly, making it difficult to remove. Utility Model Content

[0009] To address the issues of separate components and low expansion efficiency in existing technologies, this invention provides an expansion locking rod that is integrated into a single unit while also improving expansion efficiency.

[0010] To achieve the above objectives, this utility model provides the following technical solution:

[0011] An expansion locking bar, comprising:

[0012] clubhead;

[0013] An expansion sleeve has a connecting end and an expansion end. The connecting end is connected to the connecting end of the rod head through a connecting shell. The expansion end is elastic and has a slot. A compression block is connected to the insertion port of the slot through a first connecting strip. The first connecting strip is plastic.

[0014] The compression block is driven to move toward the insertion port so that it is inserted into the slot, thereby causing the expansion end to expand outward.

[0015] As described above, the expansion locking rod further includes a first serration on the inner wall of the slot, and a second serration on the two sides of the pressing block opposite to the inner wall of the slot, wherein the first serration meshes with the second serration.

[0016] As described above, the expansion locking rod further includes a limiting groove inside the connecting shell. A first arc groove and a second arc groove are respectively formed at both ends of the limiting groove. The diameters of the first and second arc grooves are both smaller than the diameter of the limiting groove. The connecting end of the expansion sleeve is connected to a first limiting block via a connecting post. The connecting end of the rod head is fitted with a second limiting block. The connecting post is adapted to the first arc groove, and the connecting end of the rod head is adapted to the second arc groove. The cross-section of the first limiting block is larger than the cross-section of the first arc groove, and the cross-section of the second limiting block is larger than the cross-section of the second arc groove. The first and second limiting blocks respectively abut against both ends of the limiting groove.

[0017] The expansion locking rod described above further includes a spring, which is disposed in the limiting groove, and the two ends of the spring abut against the first limiting block and the second limiting block, respectively.

[0018] As described above, the expansion locking rod is further provided in that the connecting shell is formed by splicing a first shell and a second shell. The inner sidewall of the first shell is provided with a groove, and the inner sidewall of the second shell is provided with a protrusion, which is adapted to the groove.

[0019] As described above, the expansion locking rod further includes a first housing with a through-hole, the through-hole forming a first limiting surface with the outer side wall of the first housing, and a locking block on the second housing with a second limiting surface.

[0020] When the first housing and the second housing are joined together, the second limiting surface abuts against the first limiting surface so that the locking block is engaged in the insertion hole.

[0021] As described above, the expansion locking rod is further provided that when the first housing and the second housing are not spliced ​​together, the first housing and the second housing are connected by a second connecting strip, which is plastic.

[0022] As described above, the expansion locking rod further includes threads on the outer side wall of the connecting shell near the rod head, and a smooth surface on the outer side wall of the connecting shell near the expansion sleeve.

[0023] As described above, the expansion locking rod further includes reverse teeth on the outer wall of the expansion end.

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

[0025] 1. The present invention integrates the extrusion block and the expansion sleeve by means of a first connecting strip, which avoids the components being scattered or lost;

[0026] 2. The extrusion block of this utility model is connected to the insertion port by a plastic first connecting strip. The extrusion block can be directly driven into the slot by a tool, thereby improving the expansion efficiency.

[0027] 3. The present invention improves the connection stability between the expansion sleeve and the rod head by having the first limiting block and the second limiting block abut against the two sides of the limiting groove wall. Attached Figure Description

[0028] 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.

[0029] Figure 1 This is a schematic diagram of the locking rod (connecting shell not unfolded) in an embodiment of this utility model;

[0030] Figure 2 This is a schematic diagram of the locking rod (with the connecting shell unfolded) in an embodiment of the present utility model;

[0031] Figure 3 This is a schematic diagram of the locking rod (with the connecting shell unfolded) in an embodiment of the present utility model;

[0032] Figure 4 This is a rear view of the locking rod (with the connecting shell unfolded) in an embodiment of this utility model;

[0033] Figure 5 This is a schematic diagram of the locking rod being inserted into the locking groove in an embodiment of this utility model;

[0034] In the diagram: 1. Rod head; 2. Expansion sleeve; 3. Connecting shell; 4. Extrusion block; 5. Slot; 6. First connecting strip; 7. First serration; 8. Second serration; 9. Limiting groove; 10. First arc groove; 11. Second arc groove; 12. Connecting post; 13. First limiting block; 14. Second limiting block; 15. Spring; 16. First housing; 17. Second housing; 18. Groove; 19. Protrusion; 20. Insertion hole; 21. Locking block; 22. First limiting surface; 23. Second limiting surface; 24. Second connecting strip; 25. Thread; 26. Backtooth. Detailed Implementation

[0035] 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.

[0036] Example:

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] This utility model provides a technical solution: an expansion lock bar, which includes a bar head 1 and an expansion sleeve 2. The expansion sleeve 2 has a connecting end and an expansion end. The connecting end is connected to the connecting end of the bar head through a connecting shell 3. The expansion end is elastic and has a slot 5. The insertion port of the slot 5 is connected to a compression block 4 through a first connecting strip 6. The first connecting strip 6 is plastic. The compression block 4 is driven to move towards the insertion port so that it is inserted into the slot 5, thereby causing the expansion end to expand outward.

[0042] Specifically, see Figures 1 to 4 The expansion sleeve 2 and the extrusion block 4 of this locking rod are integrally cast using the first connecting strip 6, avoiding the problem of components being scattered and easily lost. Furthermore, they can be produced using a single mold, improving production efficiency and reducing production costs. The first connecting strip 6 has a certain degree of plasticity, and the cross-section of the slot 5 is slightly smaller than the cross-section of the extrusion block 4. When the extrusion block 4 is inserted into the slot 5, it expands the expansion sleeve outwards. Since the extrusion block 4 is initially positioned and fixed at the insertion point, it can be directly driven into the slot 5 using a tool without further positioning, thus improving expansion efficiency.

[0043] As an optional implementation, in some embodiments, the inner wall of the slot 5 is provided with first serrations 7, and the pressing block 4 is provided with second serrations 8 on both sides opposite to the inner wall of the slot 5, with the first serrations 7 and the second serrations 8 meshing together. See again... Figure 2 and Figure 3 The first saw tooth 7 and the second saw tooth 8 are matched in shape, which enables the extrusion block 4 to move from the opening to the bottom of the slot 5 and cannot move in the opposite direction to form a self-locking mechanism, thereby improving the stability of the expansion sleeve 2 after expansion.

[0044] As an optional implementation, in some implementations, a limiting groove 9 is formed in the connecting shell 3. A first arc groove 10 and a second arc groove 11 are respectively formed at both ends of the limiting groove 9. The diameters of the first arc groove 10 and the second arc groove 11 are both smaller than the diameter of the limiting groove 9. The connecting end of the expansion sleeve 2 is connected to a first limiting block 13 through a connecting post 12. The connecting end of the rod head 1 is fitted with a second limiting block 14. The connecting post 12 is adapted to the first arc groove 10, and the connecting end of the rod head 1 is adapted to the second arc groove 11. The cross-section of the first limiting block 13 is larger than the cross-section of the first arc groove 10, and the cross-section of the second limiting block 14 is larger than the cross-section of the second arc groove 11. The first limiting block 13 and the second limiting block 14 abut against the two ends of the limiting groove 9, respectively.

[0045] Specifically, see again Figure 2 and Figure 3 The outer wall of the connecting post 12 is in contact with the groove surface of the first arc groove 10, and the outer wall of the connecting end of the rod head 1 is in contact with the groove surface of the second arc groove 11. At the same time, since the diameters of the first arc groove 10 and the second arc groove 11 are both smaller than the diameter of the limiting groove 9, and the cross-section of the first limiting block 13 is larger than the cross-section of the first arc groove 10, and the cross-section of the second limiting block 14 is larger than the cross-section of the second arc groove 11, the first limiting block 13 cannot enter the first arc groove 10 and the second limiting block 14 cannot enter the second arc groove 11. They can only abut against the two side groove walls of the limiting groove 9, which improves the connection stability between the expansion sleeve and the rod head.

[0046] In the above embodiment, a spring 15 is further included. The spring 15 is disposed within the limiting groove 9, and its two ends abut against the first limiting block 13 and the second limiting block 14, respectively. See again... Figure 2 and Figure 3 When the locking rod is installed, the rod head 1 will be compressed and move towards the expansion sleeve 2. At this time, the spring 15 will undergo elastic deformation, achieving quick installation. When the locking rod is disassembled, it will be disassembled outward along the slope of the locking groove. At this time, the spring 15 will be subjected to a vertically upward force from the slope, causing elastic deformation, achieving quick removal. In addition, when the external force acting on the spring 15 disappears, the elastic force of the spring 15 will cause the rod head 1 to move away from the expansion sleeve 2, achieving self-reset.

[0047] In the above embodiment, the connecting shell 3 is further formed by splicing a first shell 16 and a second shell 17. The inner wall of the first shell 16 has a groove 18, and the inner wall of the second shell 17 has a protrusion 19, which is adapted to fit the groove 18. See again... Figure 2 and Figure 3The size and shape of the protrusion 19 are the same as those of the groove 18, so that the first housing 16 and the second housing 17 can be spliced ​​together by the groove 18 and the protrusion 19 engaging with each other. This connection method is simple and stable.

[0048] In the above embodiment, the first housing 16 further includes a through-hole 20, which forms a first limiting surface 22 with the outer wall of the first housing 16. The second housing 17 is provided with a locking block 21, which has a second limiting surface 23. When the first housing 16 and the second housing 17 are joined, the second limiting surface 23 abuts against the first limiting surface 22, causing the locking block 21 to engage within the through-hole 20. See also... Figure 4 In order to further improve the stability of the engagement between the first housing 16 and the second housing 17, a locking block 21 is inserted into the insertion hole 20, and the first limiting surface 22 abuts against the second limiting surface 23 to prevent the two housings from separating, thereby locking the two housings together.

[0049] In the above embodiments, further, when the first housing 16 and the second housing 17 are not spliced, the first housing 16 and the second housing 17 are connected by a second connecting strip 24, which is plastic. See again... Figure 4 The first shell 16, the second shell 17, and the second connecting strip 24 are integrally cast, which avoids the problem of the components of the connecting shell 3 being scattered and easily lost. At the same time, it can be produced through a single mold, improving production efficiency and reducing production costs.

[0050] As an optional implementation, in some embodiments, the outer wall of the connecting shell 3 is provided with threads 25 near the rod head 1, and the outer wall of the connecting shell 3 is smoothly provided near the expansion sleeve 2. The smooth design allows for a more uniform force distribution on the connecting shell 3 during locking rod installation, while the threads 25 enhance the friction between the connecting shell 3 and the inner wall of the substrate, effectively resisting vibration, impact, and external pulling forces, thereby significantly improving the stability and anti-loosening performance of the connection.

[0051] As an optional implementation, in some embodiments, the outer wall of the expanded end is provided with reverse teeth 26. See again... Figure 2 and Figure 3 This further increases the friction between the material and the inner wall of the substrate.

[0052] Instructions for using this expansion locking bar: See [link / reference] Figure 5The second housing is manually moved to connect with the first housing. The connection is relatively stable due to the anti-reverse structure (insertion hole and locking block, protrusion and groove). The surface of the rod head is tapped with a tool (hammer, etc.) to assemble it into the pre-embedded hole. At this point, the extrusion block touches the bottom and is subjected to vertical upward pressure, causing it to insert into the slot of the expansion sleeve and push the expansion sleeve outward. The first connecting strip breaks under force when the extrusion block inserts into the slot.

[0053] 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.

[0054] 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. An expansion-type locking rod, characterized in that, include: clubhead; An expansion sleeve has a connecting end and an expansion end. The connecting end is connected to the connecting end of the rod head through a connecting shell. The expansion end is elastic and has a slot. A compression block is connected to the insertion port of the slot through a first connecting strip. The first connecting strip is plastic. The compression block is driven to move toward the insertion port so that it is inserted into the slot, thereby causing the expansion end to expand outward.

2. The expansion locking rod according to claim 1, characterized in that, The inner wall of the slot is provided with a first serration, and the two sides of the extrusion block opposite to the inner wall of the slot are provided with a second serration, and the first serration meshes with the second serration.

3. The expansion locking rod according to claim 1, characterized in that, A limiting groove is formed inside the connecting shell. A first arc groove and a second arc groove are respectively formed at both ends of the limiting groove. The diameters of the first arc groove and the second arc groove are both smaller than the diameter of the limiting groove. The connecting end of the expansion sleeve is connected to a first limiting block through a connecting post. The connecting end of the rod head is fitted with a second limiting block. The connecting post is adapted to the first arc groove, and the connecting end of the rod head is adapted to the second arc groove. The cross-section of the first limiting block is larger than the cross-section of the first arc groove, and the cross-section of the second limiting block is larger than the cross-section of the second arc groove. The first limiting block and the second limiting block abut against both ends of the limiting groove.

4. The expansion locking rod according to claim 3, characterized in that, It also includes a spring, which is disposed in the limiting groove, and the two ends of the spring abut against the first limiting block and the second limiting block, respectively.

5. The expansion locking rod according to claim 4, characterized in that, The connecting shell is formed by splicing a first shell and a second shell. The inner sidewall of the first shell has a groove, and the inner sidewall of the second shell has a protrusion that matches the groove.

6. The expansion locking rod according to claim 5, characterized in that, The first housing has a through-hole, and the through-hole forms a first limiting surface with the outer side wall of the first housing. The second housing is provided with a locking block, and the locking block has a second limiting surface. When the first housing and the second housing are joined together, the second limiting surface abuts against the first limiting surface so that the locking block is engaged in the insertion hole.

7. The expansion locking rod according to claim 6, characterized in that, When the first housing and the second housing are not spliced ​​together, the first housing and the second housing are connected by a second connecting strip, which is plastic.

8. The expansion locking rod according to claim 1, characterized in that, The outer side wall of the connecting shell is provided with threads near the rod head, and the outer side wall of the connecting shell is smoothly provided near the expansion sleeve.

9. The expansion locking rod according to claim 1, characterized in that, The outer wall of the expanded end is provided with reverse teeth.

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