Connection structure, chassis components, modular chassis and furniture

Abstract

This invention provides a connecting structure, a chassis assembly, a modular chassis, and furniture. The connecting structure includes two connecting brackets, a positioning pin, and a retaining part. Each connecting bracket includes an upper hook and a lower hook, both of which include a hook arm and a hook body connected to the hook arm. The upper hook is positioned above the lower hook, and the hook bodies of the upper and lower hooks are positioned opposite each other. A gap exists between the hook bodies of the upper and lower hooks, forming a first insertion channel. A second insertion channel is formed between the hook arm and hook body of the upper hook and the hook arm and hook body of the lower hook. The positioning pin is inserted into the first and second insertion channels of the two connecting brackets, connecting the two connecting brackets. The retaining part is located on the side of the connecting bracket opposite to the side where the positioning pin is inserted and is connected to the positioning pin, retaining the positioning pin within the connecting bracket. The connecting structure of this invention enables quick and easy alignment and connection, and is simple and efficient to operate.

Description

[0001] Case Analysis

[0002] The original basis for this divisional application is patent application No. 201710867461.2, filed on September 22, 2017, entitled "Connecting Structure, Chassis Assembly, Interlocking Chassis and Furniture". Technical Field

[0003] This invention relates to the fields of furniture and home decoration, and mainly to a connection structure, chassis assembly, interlocking chassis, and furniture. Background Technology

[0004] With social development and the improvement of people's living standards, people's requirements for furniture and home decoration are also getting higher and higher. Furniture types are constantly being updated. In terms of furniture categories, movable furniture, electric furniture, and convertible furniture have emerged. Moreover, each family has specific needs regarding furniture dimensions, especially the size requirements, which vary considerably.

[0005] Currently, the chassis components of mobile, electric, and convertible furniture on the domestic market are designed, processed, and manufactured according to customer order requirements. If there are multiple orders with different specifications and sizes, factories need to carry out personalized customized production. In order to meet the need for universal parts for chassis of different sizes and reduce production and inventory costs, many manufacturers have proposed the concept of modularization, which involves connecting two or more chassis modules to achieve different sizes. Existing splicing and connection methods all use bolts to connect two chassis modules together. Assembly and disassembly require the operation of multiple bolts, which is very inefficient. Furthermore, when the machining precision of the connection parts of the chassis modules is not high, or when the installation ground is uneven, causing the bolt interfaces to not align accurately, the connection operation becomes even more difficult. Summary of the Invention

[0006] Embodiments of the present invention provide a connection structure, chassis assembly, interlocking chassis, and furniture to solve the problems of low installation efficiency and difficult operation of existing interlocking chassis.

[0007] To achieve the above objectives, one embodiment of the present invention provides a connecting structure, including two connecting brackets and a positioning pin. Each connecting bracket includes an upper hook portion and a lower hook portion. The upper hook portion includes a first upper hook portion and a second upper hook portion, which are parallel and spaced apart. The lower hook portion includes a first lower hook portion and a second lower hook portion, which are parallel and spaced apart. The lower surfaces of the hook bodies of the first and second upper hook portions are on a first inclined plane, which slopes downwards along the insertion direction of the positioning pin, and has a first inclination angle θ1 relative to the horizontal mid-surface of the connecting bracket. The upper surfaces of the hook bodies of the first and second lower hook portions are on a second inclined plane, which slopes upwards along the insertion direction of the positioning pin, and has a second inclination angle θ2 relative to the horizontal mid-surface of the connecting bracket. The first inclination angle θ1 and the second inclination angle θ2 are equal.

[0008] Optionally, the inner side surface of the hook of the first upper hook, the inner side surface of the hook of the second upper hook, the inner side surface of the hook of the first lower hook, and the inner side surface of the hook of the second lower hook are located on the same third inclined plane and form a third inclined angle θ3 with the vertical side surface of the connecting bracket.

[0009] Optionally, the locating pin includes a first locating pin, the cross-section of which is cross-shaped, and the cross-sectional area of ​​the first locating pin gradually decreases from the rear end to the front end.

[0010] Optionally, the first locating pin includes four heads, the width of which gradually decreases along the insertion direction; and / or the locating pin is symmetrical about its axis.

[0011] Optionally, the first locating pin has a horizontal and a vertical mid-surface, the upper / lower side of the horizontal head forms a fourth inclination angle θ4 with the horizontal mid-surface; the left / right side of the vertical head forms a fourth inclination angle θ4 with the vertical mid-surface, and the fourth inclination angle θ4 is equal to the third inclination angle θ3.

[0012] Optionally, the upper hook is positioned above the lower hook, and the hook bodies of the upper hook and the lower hook are positioned opposite each other; a gap is provided between the hook bodies of the upper hook and the lower hook, forming a first insertion channel; a second insertion channel is formed between the hook arm and hook body of the upper hook and the hook arm and hook body of the lower hook.

[0013] Optionally, the positioning pin is inserted into the first insertion channel and the second insertion channel of the two connecting brackets to connect the two connecting brackets.

[0014] Optionally, the cross-sectional areas of both the first insertion channel and the second insertion channel gradually decrease along the insertion direction of the positioning pin.

[0015] Optionally, the connection structure of the present invention further includes a retaining part, which is disposed on the side of the connecting bracket opposite to the insertion side of the positioning pin and is connected to the positioning pin to retain the positioning pin within the connecting bracket.

[0016] A second aspect of the present invention provides a chassis assembly, including a first chassis module and a second chassis module, and further including the aforementioned connection structure, wherein the first chassis module and the second chassis module are respectively provided with connecting brackets on opposite sides, the connecting brackets of the first chassis module and the connecting brackets of the second chassis module are inserted and connected to form a first insertion channel and a second insertion channel, a first positioning pin is inserted into the first insertion channel and the second insertion channel from the insertion side of the connecting bracket, and a retaining part is connected to the first positioning pin on the side of the connecting bracket opposite to the insertion side.

[0017] Optionally, in the aforementioned chassis assembly, the retaining part is also fixedly connected to the connecting bracket.

[0018] A third aspect of the present invention provides a modular chassis, comprising two aforementioned chassis components arranged side by side; the modular chassis further comprises an extension bracket, the extension bracket comprising two fixing parts and a connecting part, the connecting part being fixedly connected to the two fixing parts; the two fixing parts of the extension bracket are respectively connected to adjacent connecting structures of the two chassis components, thereby connecting the two modular chassis together.

[0019] Optionally, the connection structure between the two chassis components is located between the two fixed parts.

[0020] Optionally, the fixing part is connected to the retaining part of the adjacent connecting structure of the two chassis assemblies; or the fixing part is connected to the locating pin of the connecting structure of the chassis assembly as the retaining part of the connecting structure of the chassis assembly.

[0021] A fourth aspect of the present invention provides a piece of furniture that uses the aforementioned chassis assembly or the aforementioned interlocking chassis.

[0022] The connection structure provided in this embodiment of the invention uses a positioning pin and a connecting bracket. The connecting bracket forms a first insertion channel and a second insertion channel. Along the insertion direction of the positioning pin, the cross-sectional area of ​​the first insertion channel and the second insertion channel gradually decreases, and the positioning pin is set to match the shape of the first insertion channel and the second insertion channel. In this way, as the positioning pin is inserted into the first insertion channel and the second insertion channel, the positioning pin squeezes the two connecting brackets, causing the two connecting brackets to move toward each other until the two connecting brackets are firmly connected together, and the positioning pin is held in the connecting bracket by the retaining part.

[0023] The connection structure of this embodiment can withstand different types of forces such as tension, compression, bending, torsion, and shearing with multiple degrees of freedom. It is easy to install; simply push in the locating pin and fix the retainer to the locating pin to achieve a reliable connection of the connection mechanism. It is very convenient to operate, less affected by processing defects, and will not cause connection difficulties due to misalignment of bolts or bolt holes.

[0024] The chassis assembly provided in this embodiment of the invention can achieve connection between chassis of the same or different sizes, meeting the needs of chassis of different sizes.

[0025] The modular chassis provided in this invention can be further assembled from different chassis components into a larger modular chassis to meet the needs of larger furniture.

[0026] The furniture provided in this invention uses a chassis assembly or a modular chassis. While meeting diverse customer needs, it reduces the number of chassis parts and minimizes the weight of individual chassis parts, effectively reducing inventory and production costs and improving inventory and production efficiency. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the connection structure according to Embodiment 1 of the present invention;

[0028] Figure 2 This is a schematic perspective view of the connecting bracket of the connecting structure according to Embodiment 1 of the present invention;

[0029] Figure 3 and Figure 4 This is a side view of the connecting bracket according to Embodiment 1 of the present invention;

[0030] Figure 5 This is a front view of the connecting bracket according to Embodiment 1 of the present invention;

[0031] Figure 6 This is a top view of the connecting bracket according to Embodiment 1 of the present invention;

[0032] Figure 7 This is a bottom view of the connecting bracket according to Embodiment 1 of the present invention;

[0033] Figure 8 This is a schematic perspective view of the first positioning pin in Embodiment 1 of the present invention;

[0034] Figure 9 This is a front view schematic diagram of the first positioning pin in Embodiment 1 of the present invention;

[0035] Figure 10 This is a rear view schematic diagram of the first positioning pin according to Embodiment 1 of the present invention;

[0036] Figure 11This is a top view of the first positioning pin in Embodiment 1 of the present invention;

[0037] Figure 12 This is a schematic diagram of the connection structure in Embodiment 2 of the present invention;

[0038] Figure 13 This is a schematic perspective view of the second positioning pin in Embodiment 2 of the present invention;

[0039] Figure 14 This is a rear view schematic diagram of the second positioning pin according to Embodiment 2 of the present invention;

[0040] Figure 15 This is a schematic cross-sectional view of the second locating pin along plane AA in Embodiment 2 of the present invention;

[0041] Figure 16 This is a top view of the second locating pin in Embodiment 1 of the present invention;

[0042] Figure 17 This is a schematic perspective view of the second positioning pin from another angle in Embodiment 2 of the present invention;

[0043] Figure 18 This is a schematic structural diagram of the chassis assembly according to Embodiment 3 of the present invention;

[0044] Figure 19 This is a schematic structural diagram of the chassis assembly according to Embodiment 4 of the present invention;

[0045] Figure 20 This is a schematic structural diagram of the splicing chassis according to Embodiment 5 of the present invention;

[0046] Figure 21 This is a schematic structural diagram illustrating the specific connection method of the splicing chassis in Embodiment 5 of the present invention;

[0047] Figure 22 This is a schematic structural diagram of the extension bracket of the splicing chassis according to Embodiment 5 of the present invention;

[0048] Figure 23 This is a schematic structural diagram illustrating another specific connection method of the splicing chassis in Embodiment 5 of the present invention;

[0049] Figure 24 This is a schematic structural diagram of another extension bracket for the splicing chassis according to Embodiment 5 of the present invention;

[0050] Explanation of icon numbers:

[0051] 1. Chassis module; 3. Connecting bracket; 301. Hook arm; 302. Hook body; 31. Upper hook section; 311. First upper hook section; 3111. Lower surface of the hook body of the first upper hook section; 3112. Inner side of the hook body of the first upper hook section; 312. Second upper hook section; 3121. Lower surface of the hook body of the second upper hook section; 3122. Inner side of the hook body of the second upper hook section; 32. Lower hook section; 321. First lower hook section; 3211. Upper surface of the hook body of the first lower hook section; 3212. Inner side of the hook body of the first lower hook section; 322. Second lower hook section; 3221. Upper surface of the hook body of the second lower hook section; 3222. Inner side of the hook body of the second lower hook section; 33. Back plate; 5. 5' 51. Extension bracket; 52. Fixing part; 53. Connecting part; 54. Reinforcing rib; 55. Third connecting hole; 56. Fourth connecting hole; 67. Second positioning pin; 61. Side pin part 61; 62. Intermediate connecting part 62; 621. Upper surface of intermediate connecting part 62; 622. Lower surface of intermediate connecting part 62; 611. Inner side of side pin part 61; 63. Second connecting hole 63; 78. First positioning pin 7; 71. Head 71; 710. Side of head 71; 72. First connecting hole 72; 8. Connector; 9. Holding part; S31. Horizontal mid-surface of connecting bracket; S32. Vertical side of connecting bracket; S62. Horizontal mid-surface of second positioning pin; S71. Horizontal or vertical mid-surface of first positioning pin 7. Detailed Implementation

[0052] The following description, provided with reference to the accompanying drawings, is intended to aid in a full understanding of the various embodiments of this disclosure as defined by the claims and their equivalents. It includes various specific details to aid understanding, but these should be considered merely illustrative. Therefore, those skilled in the art will recognize that various changes or modifications can be made to the various embodiments described herein without departing from the scope and spirit of this disclosure. Furthermore, for clarity and brevity, descriptions of well-known functions and structures will be omitted.

[0053] It should be understood that the singular forms “one,” “an,” and “the” include the plural forms unless the context explicitly indicates otherwise. Thus, for example, the reference to “a component surface” also includes the reference to one or more such surfaces.

[0054] When used herein, the terms “comprising” and / or “including” specify the presence of the disclosed functions, operations, or components, but do not exclude the presence or addition of one or more other functions, operations, or components. It should be further understood that, when used in this specification, the terms “comprising” and / or “having” specify the presence of the described features, integers, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, operations, elements, and / or components and / or groups thereof.

[0055] When used herein, the term “and / or” includes any and all combinations of one or more of the foregoing listed items. For example, “A or B” could include A, or include B, or include both A and B.

[0056] When used herein, ordinal numbers such as "first," "second," etc., may modify various components of various embodiments but do not limit these components. For example, these terms do not limit the order and / or importance of components. These terms are merely used to distinguish one component from another. For example, a first user equipment and a second user equipment are different user equipment from each other. For example, a first component may be referred to as a second component, and vice versa, without departing from the scope of this disclosure.

[0057] When a component is “connected” to another component, the component can be directly connected or coupled to the other component, or other components (or more) can be inserted in between. Conversely, when a component is “directly connected” to another component, no intermediary component can be inserted in between.

[0058] like Figures 1-11 As shown, Embodiment 1 provides a connection structure including two connecting brackets 3, a positioning pin, and a retaining part 9. The connecting bracket 3 includes an upper hook portion 31 and a lower hook portion 32. Both the upper hook portion 31 and the lower hook portion 32 include a hook arm 301 and a hook body 302 connected to the hook arm 301. The upper hook portion 31 is positioned above the lower hook portion 32, and the hook bodies 302 of the upper hook portion 31 and the lower hook portion 32 are arranged opposite to each other. A gap is provided between the hook bodies 302 of the upper hook portion 31 and the lower hook portion 32, forming a first insertion channel. The hook arm 301 of the upper hook portion 31 and the hook body 302 of the lower hook portion 32 are connected to each other. A second insertion channel is formed between the hook arm 301 and the hook body 302 of the body 302 and the lower hook portion 32; the positioning pin is inserted into the first insertion channel and the second insertion channel of the two connecting brackets 3 to connect the two connecting brackets 3; the cross-sectional area of ​​the first insertion channel and the second insertion channel gradually decreases along the insertion direction of the positioning pin; the shape of the positioning pin is adapted to the shape of the first insertion channel and the second insertion channel; the retaining part 9 is provided on the side of the connecting bracket 3 opposite to the insertion side of the positioning pin and is connected to the positioning pin to retain the positioning pin in the connecting bracket 3.

[0059] In this embodiment, the connection structure uses a locating pin and connecting bracket 3 for fastening. The connecting bracket 3 forms a first insertion channel and a second insertion channel, and the cross-sectional area of ​​the first and second insertion channels gradually decreases along the insertion direction of the locating pin. The locating pin is set to match the shape of the first and second insertion channels. Thus, as the locating pin is inserted into the first and second insertion channels, it presses against the two connecting brackets 3, causing them to move towards each other until they are securely connected. The retaining part 9 holds the locating pin within the connecting bracket 3. This connection structure can withstand various forces such as tension, compression, bending, torsion, and shearing with multiple degrees of freedom. Installation is simple; simply push in the locating pin and secure the retaining part to it to achieve alignment of the two connecting brackets 3 and ensure reliable connection. Operation is very convenient, and it is less affected by processing defects, avoiding connection difficulties caused by misalignment of bolts or bolt holes.

[0060] Specifically, Figures 2 to 7 The diagram illustrates the structure of a connecting bracket 3 according to this embodiment. The orientation is defined as follows: Figure 2 and Figure 3 The direction defined in [the document / reference].

[0061] Each connecting bracket 3 has an upper hook portion 31 including a first upper hook portion 311 and a second upper hook portion 312, which are parallel and spaced apart; the connecting bracket 3 also has a lower hook portion 32 including a first lower hook portion 321 and a second lower hook portion 322, which are parallel and spaced apart. Figure 6 and Figure 7 As shown, the projections of the first upper hook portion 311, the first lower hook portion 321, the second upper hook portion 312, and the second lower hook portion 322 on the horizontal plane are arranged sequentially and do not overlap.

[0062] It should be noted that the upper hook portion 31 is not limited to including two upper hook portions, but may include three or more upper hook portions. The lower hook portion 32 is also not limited to including two lower hook portions, but may include three or more lower hook portions.

[0063] Optionally, the upper hook portion 31 and the lower hook portion 32 of the connecting bracket 3 can be directly mounted on the component to be connected, or as... Figure 1 As shown, the upper hook 31 and the lower hook 32 are both mounted on the back plate 33, and then the back plate 33 is connected to the component to be connected.

[0064] like Figures 4 to 5As shown, the lower surface 3111 of the hook body of the first upper hook portion 311 and the lower surface 3121 of the hook body of the second upper hook portion 312 are on a first inclined plane. Along the insertion direction of the positioning pin, this first inclined plane slopes downwards and has a first inclination angle θ1 relative to the horizontal mid-surface S31 of the connecting bracket 3. The upper surface 3211 of the hook body of the first lower hook portion 321 and the upper surface 3221 of the hook body of the second lower hook portion 322 are on a second inclined plane. Along the insertion direction of the positioning pin, this second inclined plane slopes downwards and has a second inclination angle θ2 relative to the horizontal mid-surface S31 of the connecting bracket 3. Furthermore, a gap is formed between the hook bodies 302 of the first upper hook portion 311, the second upper hook portion 312, the first lower hook portion 321, and the second lower hook portion 322, with the vertical distance gradually narrowing along the insertion direction. The first inclination angle θ1 and the second inclination angle θ2 can be the same or different; for ease of processing, it is preferable that the first inclination angle θ1 and the second inclination angle θ2 are the same.

[0065] like Figure 4 Combination Figure 6 and Figure 7 As shown, the inner surface 3112 of the first upper hook portion 311, the inner surface 3122 of the second upper hook portion 312, the inner surface 3212 of the first lower hook portion 321, and the inner surface 3222 of the second lower hook portion 322 are located on the same third inclined plane, forming a third inclined angle θ3 with the vertical side S32 of the connecting bracket 3. Along the insertion direction, this third inclined plane is inclined inwards. Furthermore, as... Figure 4 As shown, along the insertion direction, a gradually narrowing insertion space for accommodating the positioning pin is formed between the hook body 302 and hook arm 301 of the upper hook portion 31 and the lower hook portion 32. The "inner side" mentioned above refers to the side closest to the insertion space. The third tilt angle θ3 can be the same as or different from the first tilt angle θ1 and the second tilt angle θ2, but is preferably the same.

[0066] Figures 8 to 11 The diagram illustrates the structure of the positioning pin in Embodiment 1. The positioning pin includes a first positioning pin 7, which has a cross-shaped cross section. The cross-sectional area of ​​the first positioning pin 7 gradually decreases from the rear end to the front end. The front end referred to here is the end into which the first positioning pin 7 is inserted when it is inserted into the connecting bracket 3. A first connecting hole 72 is provided on the axis of the first positioning pin 7. Preferably, the first connecting hole 72 is a threaded hole.

[0067] Specifically, the first positioning pin 7 includes four heads 71. Preferably, the positioning pin is symmetrical about its axis, and its four heads 71 ​​are identical in shape and symmetrical about its axis. This facilitates the processing and production of the first positioning pin 7. Furthermore, the first positioning pin 7 can be smoothly inserted into the connecting bracket 3 even when rotated 90 degrees around its axis during use. That is, the first positioning pin 7 can be inserted into the connecting bracket 3 in four directions, eliminating the need for operators to determine whether the insertion posture is correct, thus making operation more convenient.

[0068] Preferably, the width of the head 71 of the locating pin gradually decreases along the insertion direction. For example... Figure 11 As shown, the first locating pin 7 has a horizontal or vertical mid-surface S71. (As...) Figure 10 As shown, if the head 71 is horizontal, the upper / lower sides of the horizontal head 71 form a fourth inclination angle θ4 with the horizontal mid-surface; if the head 71 is vertical, the left / right sides of the vertical head 71 form a fourth inclination angle θ4 with the vertical mid-surface. Furthermore, along the insertion direction, the sides of the head 71 gradually move closer to the corresponding mid-surface, forming a head 71 with a gradually decreasing width.

[0069] Optionally, in the vertical head 71 of the first positioning pin 7, the upper surface of the upper head 71 and the lower surface of the lower head 71 are both horizontal planes. The left / right side surfaces of the horizontal head 71 of the first positioning pin 7 are vertical planes. In this way, when the first positioning pin 7 is inserted into the first insertion channel and the second insertion channel, the main weight is borne by the horizontal plane of the vertical head 71, and no tilting component force is generated. This prevents the two connecting brackets 3 from sliding relative to each other under the action of gravity, which helps to ensure a stable connection between the two connecting brackets 3.

[0070] The fourth tilt angle θ4 is equal to the first tilt angle θ1, the second tilt angle θ2, and the third tilt angle θ3 of the aforementioned connecting bracket 3. This facilitates the machining of the first positioning pin 7 and the connecting bracket 3, and also ensures that the first positioning pin 7 can be smoothly inserted into the connecting bracket 3.

[0071] The following is combined with Figure 1 The specific structure of the connection structure in Embodiment 1 will be described in detail.

[0072] The two connecting brackets 3 each have two upper hooks and two lower hooks, and the upper hooks of the two connecting brackets 3 can interlock with each other, and the lower hooks of the two connecting brackets 3 can interlock with each other.

[0073] Furthermore, a second insertion channel is formed between the lower surface of the hook arm 301 of the upper hook portion 31 and the upper surface of the hook arm 301 of the lower hook portion 32, as well as between the inner side of the hook body 302 of the upper hook portion 31 and the inner side of the hook body 302 of the lower hook portion 32. After the upper head and lower head of the first positioning pin 7 and the middle main body are inserted, they are located in the second insertion channel. The upper surface of the upper head and the lower surface of the lower head of the first positioning pin 7 can withstand vertical tension, pressure, vertical shear force, bending force and torsion from the hook arm 301. The two sides of the upper head and lower head of the first positioning pin 7 press against the inner side of the hook body 302 of the two connecting brackets 3, and can withstand lateral tension, pressure, shear force, bending force and torsion, so that the two connecting brackets 3 are aligned and close to each other in the horizontal direction, thereby realizing the positioning and fixation of the two connecting brackets 3 in the horizontal direction.

[0074] A gap is provided between the hook body 302 of the upper hook portion 31 and the lower hook portion 32 of each connecting bracket 3, forming a first insertion channel. Thus, two first insertion channels are formed on both sides of the first positioning pin 7. After the two horizontal heads of the first positioning pin 7 are inserted into the two first insertion channels respectively, the two sides of the horizontal heads press against the lower surface of the hook body 302 of the upper hook portion and the upper surface of the hook body 302 of the lower hook portion of the two connecting brackets 3, thereby achieving the vertical convergence and alignment of the two connecting brackets 3. The horizontal heads can withstand the vertical pressure, shear force, bending force and torsion from the hook body 302.

[0075] Furthermore, in this embodiment, the retaining part 9 of the connecting structure can adopt a plate-like structure and be set on the side opposite to the insertion side of the positioning pin on the connecting bracket 3. The first positioning pin 7 has a first connecting hole 72 at the front end. The first connecting hole 72 is a screw hole. The retaining part 9 can be connected to the first positioning pin 7 through a connector 8, such as a tension bolt. In this way, the first positioning pin 7 and the retaining part 9 form a clamping mechanism, clamping the two connecting brackets 3 between the first positioning pin 7 and the retaining part 9. By setting the retaining part 9, on the one hand, the first positioning pin 7 can be kept in the connecting bracket 3, and on the other hand, the clamping force of the first positioning pin 7 can be adjusted by adjusting the tension bolt.

[0076] The specific usage of the connection structure in this embodiment is described below. When two components, each equipped with a connecting bracket 3, need to be joined, the two connecting brackets 3 are first interlocked. Then, the first positioning pin 7 is inserted into the first insertion channel and the second insertion channel. A retaining part 9 is provided on the opposite side of the connecting bracket 3. The retaining part 9 is threadedly connected to the first connecting hole 72 of the first positioning pin 7 via a tension bolt. By continuously tightening the tension bolt, the first positioning pin 7 penetrates deeper into the first insertion channel and the second insertion channel. The inclined surface of the head 71 of the first positioning pin 7 continuously presses against the inner sidewalls and upper / lower surfaces of the hooks 302 of the two connecting brackets 3, thereby simultaneously aligning and tightening the two connecting brackets 3 in both the horizontal and vertical directions, causing the two connecting brackets 3 to press against each other, or causing the components connecting the two connecting brackets 3 to press against the retaining part 9. Under the combined action of the retaining part 9 and the tension bolt, the first positioning pin 7 penetrates deeper into the first insertion channel and the second insertion channel until the two components are firmly connected together.

[0077] The connection structure in Embodiment 1 has a total length equal to the length of the connecting bracket 3 after insertion, and the total length is not adjustable, which is still not flexible enough for size expansion. Based on the above problems, Embodiment 2 proposes a solution with more flexible size expansion.

[0078] Figure 12 The diagram shows a schematic of the connection structure in Embodiment 2. In the connection structure of Embodiment 2, the structure of the connecting bracket 3 is the same as that of the connecting bracket 3 in Embodiment 1. The difference lies in the use of a second positioning pin 6 to connect the two connecting brackets 3.

[0079] Figures 13 to 17 The structure of the second positioning pin 6 in Embodiment 2 is shown. The second positioning pin 6 includes two side pin portions 61 and an intermediate connecting portion 62, with both ends of the intermediate connecting portion 62 connected to the side pin portions 61 respectively; wherein, along the insertion direction, the inner surfaces of the two side pin portions 61 are inclined in a direction away from each other, and the upper and lower surfaces of the intermediate connecting portion 62 are close to the center.

[0080] Specifically, such as Figures 14 to 16 As shown, the middle connecting part 62 of the second positioning pin 6 is also a cube with a trapezoidal cross section. Its upper and lower surfaces move towards the middle along the insertion direction. Its upper surface forms a fifth inclination angle θ5 with the horizontal mid-surface S62, and its lower surface forms a sixth inclination angle θ6 with the horizontal mid-surface S62.

[0081] The side pin portion 61 of the second locating pin 6 is a cubic structure with a trapezoidal cross-section. Its inner surfaces are inclined in opposite directions, and the two inner surfaces form a seventh inclination angle θ7 with the vertical mid-surface S61. The upper and lower surfaces of the side pin portion 61 are horizontal, and the outer surface of the side pin portion 61 is a vertical surface. The two side pin portions 61 are respectively provided with a second connecting hole 63.

[0082] The fifth tilt angle θ5 and the sixth tilt angle θ6 match the first tilt angle θ1 and the second tilt angle θ2 of the aforementioned connecting bracket 3, and the seventh tilt angle θ7 matches the third tilt angle θ3 of the connecting bracket 3. Preferably, the fifth tilt angle θ5, the sixth tilt angle θ6, and the seventh tilt angle θ7 are all equal to the first tilt angle θ1, the second tilt angle θ2, and the third tilt angle θ3 of the connecting bracket 3. This facilitates the machining of the second positioning pin 6 and the connecting bracket 3 and ensures that the second positioning pin 6 can be smoothly inserted into the connecting bracket 3. However, this is not a limitation; alternatively, the fifth tilt angle θ5, the sixth tilt angle θ6, and the seventh tilt angle θ7 may be partially the same or completely different.

[0083] The specific usage of the connection structure in Embodiment 2 is described below. When two components each equipped with a connecting bracket 3 need to be joined, the two side pin portions 61 of the second positioning pin 6 are inserted into the second insertion channels of the two connecting brackets 3, and the middle connecting portion 62 is inserted into the first insertion channel. A retaining portion 9 is provided on the opposite side of the connecting bracket 3, and the retaining portion 9 is threadedly connected to the second connecting hole 63 of the second positioning pin 6 by a tension bolt. By continuously tightening the tension bolt, the second positioning pin 6 is continuously pushed deeper into the first and second insertion channels. The upper and lower surfaces of the middle connecting portion 62 of the second positioning pin 6 continuously press against the upper / lower surfaces of the hooks 302 of the two connecting brackets 3, thereby aligning the two connecting brackets 3 in the vertical direction. The two inner surfaces of the side pin portions 61 continuously press inward against the inner walls of the hooks 302 of the two connecting brackets 3, pulling the two connecting brackets 3 inward. Under the action of the second positioning pin 6, the two components gradually approach and press against the retaining part 9. Under the combined action of the inward pulling force of the second positioning pin 6 and the outward supporting force of the retaining part 9, the two components, the second positioning pin 6, and the retaining part 9 are firmly connected. Optionally, the length of the retaining part 9 is adapted to the combined length of the connecting bracket 3 and the second positioning pin 6.

[0084] Thus, the connection structure of Embodiment 2 can flexibly adjust the total length of the connection structure by adjusting the length of the intermediate connection part 62 and the holding part 9, thereby meeting the needs of various length dimensions and satisfying the needs of different products, greatly improving the flexibility and expandability of the connection structure.

[0085] See Figure 18Embodiment 3 provides a chassis assembly with two chassis modules 1, each including a first chassis module and a second chassis module, and also includes the connection structure of Embodiment 1. Connecting brackets 3 are respectively provided on opposite sides of the first and second chassis modules. The connecting brackets 3 on the first and second chassis modules together form a first insertion channel and a second insertion channel. A positioning pin is inserted into the first and second insertion channels from the insertion side of the bracket. A retaining part 9 is connected to the positioning pin on the side of the connecting bracket 3 opposite to the insertion side.

[0086] The chassis assembly of Embodiment 3 enables rapid alignment and reliable connection between two or more chassis modules, is easy to operate, has a reliable structure, and improves the rapid expansion performance of the chassis assembly in the lateral length direction.

[0087] The two chassis modules can be the same or different in size. Figure 18 The design employs two chassis modules of different sizes: a standard-sized chassis module 1 and a shorter chassis module 1', but is not limited to these. The chassis modules can be rectangular frame structures or other suitable structures. Connecting brackets 3 are mounted on the sides of chassis module 1. At least one connecting bracket 3 can be provided on one side of chassis modules 1 and 1', preferably at least two connecting brackets 3, to ensure that the two chassis modules 1 and 1' are securely connected.

[0088] Specifically, when the connection structure adopts Figure 1 In the connection structure, the connecting bracket 3 on the first chassis module and the connecting bracket 3 on the second chassis module are arranged opposite to each other and plugged together to form a first insertion channel and a second insertion channel. The first positioning pin 7 is inserted into the first insertion channel and the second insertion channel from the insertion side of the bracket. The retaining part 9 is connected to the first positioning pin 7 on the side of the connecting bracket 3 opposite to the insertion side by a tension bolt. By tightening the tension bolts of the multiple connection structures, the two chassis modules 1 and 1' can be combined into a chassis assembly.

[0089] Figure 19 The chassis assembly of Embodiment 4 is shown, which differs from the chassis assembly of Embodiment 3 in that it adopts the connection structure of Embodiment 2.

[0090] Specifically, connecting brackets 3 are provided on the opposite sides of the first chassis module and the second chassis module, and the two side pins 61 of the second positioning pin 6 are respectively inserted into the first insertion channels of the connecting brackets 3 of the two chassis modules. The middle connecting part 62 passes through the second insertion channel of the connecting brackets 3 of the two chassis modules and connects the two side pins 61. The retaining part 9 is connected to the second positioning pin 6 on the side of the connecting bracket 3 opposite to the insertion side. The two sides of the retaining part 9 abut against the first chassis module and the second chassis module respectively.

[0091] The retaining part 9 is threadedly connected to the second connecting hole 63 of the second locating pin 6 via a tension bolt. As the tension bolt is continuously tightened, the second locating pin 6 penetrates deeper into the first and second insertion channels. The upper and lower surfaces of the middle connecting part 62 of the second locating pin 6 continuously press against the upper / lower surfaces of the hooks 302 of the two connecting brackets 3, thereby aligning the two connecting brackets 3 and the chassis module 1 vertically. The two inner sides of the side pin part 61 continuously press inward against the inner walls of the hooks 302 of the two connecting brackets 3, pulling the two chassis modules 1 inward. Under the action of the second locating pin 6, the two chassis modules 1 gradually approach and press against the retaining part 9, thereby firmly connecting the two chassis modules 1, the second locating pin 6, and the retaining part 9.

[0092] The chassis assembly of Embodiment 4 can flexibly adjust the total longitudinal length of the chassis assembly by adjusting the length of the intermediate connecting part 62 and the retaining part 9. Without adjusting the size of the chassis module, it can meet the needs of various length dimensions, satisfy the requirements of different products, reduce the size types of chassis modules, reduce the weight of chassis module parts, reduce the difficulty of inventory preparation, reduce production costs, and greatly improve the flexibility and expandability of the chassis assembly.

[0093] Example 5 provides a modular chassis, such as Figure 20 As shown, it includes two chassis assemblies as described in Embodiment 3 or Embodiment 4. The two chassis assemblies are arranged side by side in the longitudinal direction; the modular chassis also includes an extension bracket, which includes two fixing parts 51 and a connecting part 52, with the connecting part 52 fixedly connecting the two fixing parts 51; the two fixing parts 51 of the extension bracket are respectively connected to adjacent connecting structures of the two chassis assemblies, thereby connecting the two modular chassis together.

[0094] Specifically, the connection structure of the two chassis components is located between the two fixing parts 51. In this way, the two fixing parts 51 restrict the connection structure of the two chassis components in the middle, which can effectively prevent the two chassis components from separating and improve the reliability of the connection.

[0095] Preferably, the fixing part 51 is also provided with reinforcing ribs 53 to improve the structural strength of the fixing part 51. One or more reinforcing ribs 53 may be provided.

[0096] The two fixing parts 51 of the extension bracket can be connected to adjacent connection structures of the two chassis assemblies in the following ways: either the two fixing parts 51 can be connected to the upper hook and lower hook of the connection structure, or to the retaining part 9 of the connection structure. Alternatively, the two fixing parts 51 can serve as retaining parts of the connection structure of the two chassis assemblies, and can be directly connected to the locating pin by tightening bolts. This eliminates the need for retaining parts, reduces weight, and saves space.

[0097] Figure 21 and Figure 22 The structure of the expansion bracket connecting the chassis assembly of Embodiment 3 is shown. It can be seen that each fixing part 51 on the expansion bracket is provided with a third connecting hole 54. The third connecting hole 54 is used to connect the first connecting hole 72 of the first positioning pin 7 of the adjacent connecting structure of the two chassis assemblies respectively. For example, it can be connected by bolts. The length of the fixing part 51 is basically equal to the length of the two connecting brackets 3 after they are inserted.

[0098] Preferably, each fixing part 51 may also be provided with a fourth connecting hole 55, through which the fixing part 51 and the connecting bracket 3 can be fixedly connected. The connection method can be bolt, pin connection or other methods, to further ensure the firmness and reliability of the connection.

[0099] Figure 23 and Figure 24 The diagram shows the structure of the expansion bracket connecting the chassis assembly of Embodiment 4. It can be seen that each fixing part 51 of the expansion bracket has two third connecting holes 54. Thus, each fixing part 51 is connected to the two second connecting holes 63 of the second positioning pin 6 of a connecting structure via these two third connecting holes 54, for example, by bolts, thereby connecting the expansion bracket to the connecting structure of the two chassis assemblies.

[0100] Preferably, each fixing part 51 may also be provided with a fourth connecting hole 55, through which the fixing part 51 and the connecting bracket 3 can be fixedly connected. The connection method can be bolt, pin, rivet or other methods to further ensure the firmness and reliability of the connection.

[0101] By setting up extension brackets, the modular chassis achieves lateral length expansion. Combined with the scalability of the longitudinal width of the chassis components, the modular chassis can achieve a variety of combinations of lateral length and longitudinal width while ensuring that the basic dimensions of the chassis modules remain at one or fewer (e.g., two or three). This greatly reduces the number of spare parts and production costs, and improves production flexibility.

[0102] Example 6 provides a piece of furniture that uses the chassis components of Examples 3 and 4 and / or the modular chassis of Example 5. This furniture, while allowing for flexible changes in furniture size, significantly reduces the number of chassis parts. By combining different chassis modules and connection structures, it can meet the needs of different sizes, greatly reducing the number of spare parts and production costs, and improving production flexibility.

[0103] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A connection structure comprising two connecting brackets and a positioning pin, characterized in that, The connecting bracket includes an upper hook and a lower hook. A gap is provided between the hooks of the upper hook and the lower hook, forming a first insertion channel. A second insertion channel is formed between the hook arm and hook body of the upper hook and the hook arm and hook body of the lower hook. Along the insertion direction of the positioning pin, the cross-sectional areas of the first and second insertion channels gradually decrease, and the positioning pin is set to match the shape of the first and second insertion channels. The positioning pin includes a first positioning pin, the first positioning pin having a cross-shaped cross section, the cross-sectional area of ​​the first positioning pin gradually decreasing from the rear end to the front end; the first positioning pin includes four heads, the width of the heads gradually decreasing along the insertion direction; and / or the positioning pin is symmetrical about its axis center. The upper hook portion includes a first upper hook portion and a second upper hook portion, the first upper hook portion and the second upper hook portion are parallel and there is a gap between them; The lower hook portion includes a first lower hook portion and a second lower hook portion, the first lower hook portion and the second lower hook portion are parallel and have a gap between them; The lower surface of the hook body of the first upper hook and the lower surface of the hook body of the second upper hook are on a first inclined plane. Along the insertion direction of the positioning pin, the first inclined plane is inclined downward, and the first inclined plane has a first inclination angle θ1 relative to the horizontal mid-surface of the connecting bracket. The upper surface of the hook body of the first lower hook and the upper surface of the hook body of the second lower hook are on a second inclined plane. Along the insertion direction of the positioning pin, the second inclined plane is inclined upward, and the second inclined plane has a second inclination angle θ2 relative to the horizontal mid-surface of the connecting bracket. The first tilt angle θ1 and the second tilt angle θ2 are equal; The inner side surface of the hook of the first upper hook, the inner side surface of the hook of the second upper hook, the inner side surface of the hook of the first lower hook, and the inner side surface of the hook of the second lower hook are located on the same third inclined plane and form a third inclined angle θ3 with the vertical side surface of the connecting bracket. The first locating pin has a horizontal and a vertical mid-surface. The upper / lower side of the horizontal head forms a fourth inclination angle θ4 with the horizontal mid-surface. The left / right side of the vertical head forms a fourth inclination angle θ4 with the vertical mid-surface. The fourth inclination angle θ4 is equal to the third inclination angle θ3.

2. The connection structure according to claim 1, characterized in that, It also includes a retaining part, which is disposed on the side of the connecting bracket opposite to the side where the positioning pin is inserted, and is connected to the positioning pin to retain the positioning pin within the connecting bracket.

3. A chassis assembly, comprising a first chassis module and a second chassis module, characterized in that, It also includes the connection structure as described in claim 2, in, The first chassis module and the second chassis module are respectively provided with connecting brackets on opposite sides. The connecting brackets on the first chassis module and the connecting brackets on the second chassis module are plugged into each other to form a first insertion channel and a second insertion channel. The first positioning pin is inserted into the first insertion channel and the second insertion channel from the insertion side of the connecting bracket. The retaining part is connected to the first positioning pin on the side of the connecting bracket opposite to the insertion side.

4. A modular chassis, characterized in that, It includes two chassis components as described in claim 3, the two chassis components being arranged side by side; The modular chassis also includes an extension bracket, which includes two fixing parts and a connecting part, and the connecting part is fixedly connected to the two fixing parts. The two fixed parts of the extension bracket are respectively connected to the adjacent connection structures of the two chassis assemblies, thereby connecting the two spliced ​​chassis together.

5. The modular chassis according to claim 4, characterized in that, The fixing part is connected to the retaining part of the adjacent connection structure of the two chassis assemblies; or The fixing part, which serves as the retaining part of the connecting structure of the chassis assembly, is connected to the positioning pin of the connecting structure of the chassis assembly.

6. A type of furniture, characterized in that, The chassis assembly as described in claim 3, or the modular chassis as described in claim 4 or 5, is used.

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