Furniture hidden type connecting structure

Abstract

The utility model discloses a furniture hidden type connecting structure which comprises a connecting rod, an expansion cylinder sleeve and an eccentric wheel. A conical pull expansion head is arranged at one end of the connecting rod, and a connecting end head is arranged at the other end of the connecting rod and can be clamped into the eccentric wheel; the expansion cylinder sleeve is arranged on the outer side of the connecting rod in a sleeving mode, a plurality of expansion bodies are arranged at the end, close to the connecting end, of the expansion cylinder sleeve at intervals in the circumferential direction, and an arc-shaped abutting part is arranged at the end, close to the connecting end, of the expansion cylinder sleeve and can abut against the outer contour of the eccentric wheel. According to the utility model, the expansion body is of a flat thin-wall structure of the expansion cylinder sleeve, so that the overall occupied space is small, the design size of the first mounting hole can be effectively reduced, and the expansion body can be used on a component with thin plate thickness; moreover, in the continuous pulling process of the pull expansion head, the expansion deformation of the expansion body can be further expanded, the locking firmness of the expansion body and the first mounting hole is further improved, and the risk of tooth disengagement is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of furniture fastening connection, in particular to a hidden connection structure of furniture. Background Art

[0002] At present, with the continuous improvement of people's aesthetic concepts, invisible connectors are gradually used between two furniture panels or two metal components to achieve hidden connection, thereby improving the aesthetics of furniture or equipment. Among them, three-in-one connectors are widely used in the connection between two furniture panels. For example, a connection assembly and connection system disclosed in patent number CN202220874803.X. The existing three-in-one connection structure is mainly composed of embedded nuts, connecting rods and eccentric wheels. When in use, the embedded nut is embedded in the first mounting hole of the first component, and the eccentric wheel is installed in the second mounting hole of the second component; the expansion head of the connecting rod is threadedly connected to the embedded nut, and the second end of the connecting rod is inserted into the interior of the second component and firmly connected to the eccentric wheel; the eccentric wheel is rotated to pull the connecting rod backward, so that the expansion head of the connecting rod moves backward relative to the embedded nut, and the embedded nut is expanded and locked to the first component, so that the first component and the second component are connected in an invisible manner through the three-in-one connector.

[0003] However, the three-in-one hidden connection structure has the following defects:

[0004] 1. The embedded nut is usually sleeved outside the expansion head and threadedly connected; the embedded nut and the mounting hole of the first component require a certain layout space, which is not conducive to use on components with thin plate thickness.

[0005] 2. In order to facilitate expansion and deformation, the embedded nut is divided into several expansion bodies along the circumferential direction through gaps; the expansion head is pulled back to make the expansion body expand and deform in a trumpet shape, thereby locking it in the first mounting hole. However, after the expansion head is pulled back and displaced, the front end of the embedded nut is in a hollow state. Under the restriction of the first mounting hole, the front end of the embedded nut, i.e., the expansion body, will shrink and deform inward, causing the internal thread to deform and shift to a certain extent. The thread locking force of the embedded nut and the expansion head changes, and there is a certain risk of stripping. Utility Model Content

[0006] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a furniture hidden connection structure.

[0007] The technical solution adopted by an embodiment of the utility model to solve the technical problem is: a hidden furniture connection structure, comprising: a connecting rod, an expansion sleeve and an eccentric wheel;

[0008] One end of the connecting rod is provided with a conical expansion head, and the other end is provided with a connecting end head, and the connecting end head can be inserted into the eccentric wheel; the expansion sleeve is sleeved on the outside of the connecting rod, and a plurality of expansion bodies are arranged at intervals along the circumferential direction at one end close to the expansion head, and an arc-shaped pressing portion is provided at one end close to the connecting end head, and the arc-shaped pressing portion can be pressed against the outer contour of the eccentric wheel;

[0009] By rotating the eccentric wheel, the connecting rod can move toward one side of the eccentric wheel along with the connecting end, the expansion sleeve is pressed against the outer contour of the eccentric wheel and remains stationary, and the expansion head can move toward the expansion body to expand and deform the expansion body.

[0010] Optionally, an inclined abutment portion is provided at one end of the expansion body close to the expansion head, and the inclined abutment portion can be fitted against a conical outer wall of the expansion head.

[0011] Optionally, a stretching rib is provided at one end of the expansion body away from the expansion head.

[0012] Optionally, the stretching rib is an annular convex rib facing one side of the stretching rod; two convex rib limiting rings are provided at one end of the connecting rod close to the expansion head; and the stretching rib can move between the two convex rib limiting rings.

[0013] Optionally, a plurality of inverted tooth structures are axially arranged on the outer side of the expansion body.

[0014] Optionally, the expansion sleeve is composed of two half sleeves that can be spliced ​​together left and right.

[0015] Optionally, a buckle groove ear is provided on one side of the half-tube sleeve, and a buckle hook ear is provided on the other side; the buckle hook ear of one half-tube sleeve can be buckled with the buckle groove ear of the other half-tube sleeve.

[0016] Optionally, the front and rear ends of one side of the half-cylinder sleeve are provided with limiting protrusions, and the front and rear ends of the other side are provided with limiting grooves; the limiting protrusion of one half-cylinder sleeve can be inserted into the limiting groove of the other half-cylinder sleeve.

[0017] Optionally, the expansion sleeve extends obliquely toward the connecting rod to form a main limiting ear; the connecting rod is provided with a main limiting ring platform; the main limiting ear can be abutted against the main limiting ring platform.

[0018] The utility model has the following beneficial effects: the expansion body of the expansion sleeve and the expansion head of the connecting rod can be inserted into the first connecting hole of the first component; the expansion sleeve and the remaining end of the connecting rod can be inserted into the second component and connected to the eccentric wheel through the connecting end of the connecting rod; during specific use, the eccentric wheel is rotated, so that the connecting rod can move toward one side of the eccentric wheel along with the connecting end, the expansion sleeve is pressed against the outer contour of the eccentric wheel and remains motionless, and the expansion head can move toward the expansion body to expand and deform the expansion body; after the expansion body is deformed, it can be firmly clamped in the first connecting hole, and as the connecting rod moves toward one side of the eccentric wheel, the conical expansion head can further expand and deform the expansion body, and the locking is more secure. The utility model does not use the method of threaded connection between the embedded nut and the expansion head to pull and expand the embedded nut, but instead uses the method of expanding the expansion body through the conical expansion head; the expansion body is a flat thin-walled structure of the expansion sleeve, which occupies a small space as a whole, can effectively reduce the design size of the first mounting hole, and can be used on components with thinner plate thickness; and, in the process of continuous pulling, the expansion head can further expand the expansion deformation of the expansion body, further deepen the firmness of the locking of the expansion body and the first mounting hole, and will not produce the risk of tooth stripping.

[0019] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 This is a structural schematic diagram of the hidden connection structure of the utility model;

[0022] Figure 2 for Figure 1 Exploded schematic diagram of the hidden connection structure;

[0023] Figure 3 for Figure 1 Cross-sectional view of the hidden connection structure.

[0024] Description of main component symbols:

[0025] 10. Connecting rod; 11. Tensioning head; 12. Connecting end; 13. Protruding rib limiting ring; 14. Main limiting ring; 20. Expansion sleeve; 21. Expansion body; 211. Inclined abutment portion; 212. Tensile rib; 213. Inverted tooth structure; 22. Arc-shaped abutment portion; 23. Half sleeve; 24. Buckle groove ear; 25. Buckle hook ear; 26. Limiting convex portion; 27. Limiting notch; 28. Main limiting ear; 30. Eccentric wheel. DETAILED DESCRIPTION

[0026] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0027] In the description of the present utility model, the meaning of "more than" is more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0028] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In the present invention, unless otherwise clearly defined, the words "set", "install", "connect" and the like should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium; they can be fixedly connected or detachably connected or integrally formed; they can be mechanically connected; they can be the internal connection of two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0030] Example

[0031] Reference Figures 1 to 3 The utility model provides a furniture hidden connection structure, comprising: a connecting rod 10, an expansion sleeve 20 and an eccentric wheel 30;

[0032] A conical expansion head 11 is provided at one end of the connecting rod 10, and a connecting end 12 is provided at the other end, and the connecting end 12 can be inserted into the eccentric wheel 30; an expansion sleeve 20 is sleeved on the outside of the connecting rod 10, and a plurality of expansion bodies 21 are provided at intervals along the circumferential direction at one end close to the expansion head 11, and an arc-shaped pressing portion 22 is provided at one end close to the connecting end 12, and the arc-shaped pressing portion 22 can be pressed against the outer contour of the eccentric wheel 30;

[0033] Rotating the eccentric wheel 30 can make the connecting rod 10 move toward one side of the eccentric wheel 30 along with the connecting end 12, and the expansion sleeve 20 is pressed against the outer contour of the eccentric wheel 30 to remain stationary, and the tension expansion head 11 can move toward the expansion body 21 to expand and deform the expansion body 21.

[0034] In the utility model, the expansion body 21 of the expansion sleeve 20 and the expansion head 11 of the connecting rod 10 can be inserted into the first connecting hole of the first component; the expansion sleeve 20 and the remaining end of the connecting rod 10 can be inserted into the second component, and connected to the eccentric wheel 30 through the connecting end 12 of the connecting rod 10; during specific use, the eccentric wheel 30 is rotated, so that the connecting rod 10 can move toward one side of the eccentric wheel 30 along with the connecting end 12, the expansion sleeve 20 is pressed against the outer contour of the eccentric wheel 30 and remains motionless, and the expansion head 11 can move toward the expansion body 21 and expand and deform the expansion body 21; after the expansion body 21 is deformed, it can be firmly clamped in the first connecting hole, and as the connecting rod 10 moves toward one side of the eccentric wheel 30, the conical expansion head 11 can further expand and deform the expansion body 21, and the locking is more secure.

[0035] The utility model does not use the method of threaded connection between the embedded nut and the expansion head 11 to pull and expand the embedded nut, but uses the method of expanding the expansion body 21 through the conical expansion head 11; the expansion body 21 is a flat thin-walled structure of the expansion sleeve 20, which occupies a small space as a whole, can effectively reduce the design size of the first mounting hole, and can be used on components with thinner plate thickness; and, in the process of continuous pulling of the expansion head 11, the expansion deformation of the expansion body 21 can be further enlarged, and the firmness of the locking of the expansion body 21 and the first mounting hole can be further deepened, and there will be no risk of tooth stripping.

[0036] In this embodiment, an inclined abutment portion 211 is provided at one end of the expansion body 21 close to the expansion head 11, and the inclined abutment portion 211 can be fitted against the tapered outer wall of the expansion head 11. Through the inclined abutment portion 211, one end of the expansion body 21 can be fitted and deformed outward along the tapered outer wall of the expansion head 11, and the inner side is firmly fitted to the tapered outer wall of the expansion head 11, without having an internal hollow state, thereby avoiding reverse deformation of the expansion body 21.

[0037] Specifically, a stretching rib 212 is provided at one end of the expansion body 21 away from the expansion head 11. The stretching rib 212 has strong rigidity and is not easily deformed, and can limit the deformation area of ​​the expansion sleeve 20 to only occur in the expansion body 21 area.

[0038] Furthermore, the stretching rib 212 is an annular convex rib facing one side of the stretching rod; two convex rib limiting rings 13 are provided at one end of the connecting rod 10 close to the tensioning head 11; the stretching rib 212 can move between the two convex rib limiting rings 13. The two convex rib limiting rings 13 on both sides of the stretching rib 212 can limit the movement span of the expansion body 21, thereby limiting the deformation of the expansion body 21 and preventing the expansion body 21 from expanding and rupturing due to overexpansion.

[0039] In this embodiment, a plurality of inverted tooth structures 213 are axially arranged on the outer side of the expansion body 21. After the expansion body 21 expands outward, the outer inverted tooth structures 213 are pressed against the inner wall of the hole to strengthen the connection stability with the first mounting hole.

[0040] In this embodiment, in order to facilitate the manufacture of the expansion sleeve 20 and to sleeve and install the expansion sleeve 20 on the outside of the connecting rod 10, the expansion sleeve 20 is composed of two half sleeves 23 that can be assembled left and right.

[0041] Specifically, a buckle groove ear 24 is provided on one side of the half sleeve 23, and a buckle hook ear 25 is provided on the other side; the buckle hook ear 25 of one half sleeve 23 can be buckled with the buckle groove ear 24 of the other half sleeve 23. Through the structure of the buckle hook and the buckle groove, the two half sleeves 23 can be conveniently assembled.

[0042] Furthermore, the front and rear ends of one side of the half sleeve 23 are provided with limiting protrusions 26, and the front and rear ends of the other side are provided with limiting notches 27; the limiting protrusion 26 of one half sleeve 23 can be inserted into the limiting notch 27 of the other half sleeve 23. By using the limiting protrusions 26 and limiting notches 27 at the front and rear ends, the engagement areas at the front and rear ends of the two half sleeves 23 can be increased, so that the eccentric wheel 30 presses against the expansion sleeve 20, and when it moves relative to the connecting rod 10, it is not easy to be misaligned, and the expansion of the expansion body 21 is more stable.

[0043] In this embodiment, the structure of the buckle hook and the buckle groove, the limiting protrusion 26 and the limiting groove 27 are all arranged on the opposite sides of the half-cylinder sleeve 23, and the two identical semicircular half-cylinder sleeves 23 are arranged symmetrically with the center, so that the buckle hook and the buckle groove, as well as the limiting protrusion 26 and the limiting groove 27 can be exactly engaged.

[0044] In some embodiments, in order to further limit the relative movement of the expansion sleeve 20 and the connecting rod 10, the expansion sleeve 20 extends obliquely toward the connecting rod 10 to form a main limit ear 28; the connecting rod 10 is provided with a main limit ring 14; the main limit ear 28 can be set against the main limit ring 14. The main limit ear 28 and the main limit ring 14 are respectively arranged in the middle of the expansion sleeve 20 and the connecting rod 10, which can further limit the movement of the expansion sleeve 20 relative to the connecting rod 10, thereby limiting the deformation of the expansion body 21 and preventing the expansion body 21 from excessive expansion and rupture.

[0045] Of course, the present invention is not limited to the above-mentioned embodiments, and technicians familiar with the field may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications and substitutions are all included in the scope defined by the claims of this application.

Claims

1. A hidden furniture connection structure, characterized in that: include: A connecting rod (10), an expansion sleeve (20) and an eccentric wheel (30); One end of the connecting rod (10) is provided with a conical expansion head (11), and the other end is provided with a connecting end head (12), and the connecting end head (12) can be inserted into the eccentric wheel (30); the expansion sleeve (20) is sleeved on the outer side of the connecting rod (10), and a plurality of expansion bodies (21) are arranged at intervals along the circumferential direction at one end close to the expansion head (11), and an arc-shaped pressing portion (22) is provided at one end close to the connecting end head (12), and the arc-shaped pressing portion (22) can be pressed against the outer contour of the eccentric wheel (30); By rotating the eccentric wheel (30), the connecting rod (10) can move along with the connecting end (12) toward one side of the eccentric wheel (30), the expansion sleeve (20) is pressed against the outer contour of the eccentric wheel (30) and remains stationary, and the tension expansion head (11) can move toward the expansion body (21) to expand and deform the expansion body (21).

2. The furniture hidden connection structure according to claim 1, characterized in that: An inclined abutment portion (211) is provided at one end of the expansion body (21) close to the expansion head (11), and the inclined abutment portion (211) can be fitted against the conical outer wall of the expansion head (11).

3. The furniture hidden connection structure according to claim 1, characterized in that: A stretching rib (212) is provided at one end of the expansion body (21) away from the expansion head (11).

4. The furniture hidden connection structure according to claim 3, characterized in that: The stretching rib (212) is an annular convex rib facing one side of the connecting rod (10); two convex rib limiting ring platforms (13) are provided at one end of the connecting rod (10) close to the tensioning head (11); and the stretching rib (212) can move between the two convex rib limiting ring platforms (13).

5. The furniture hidden connection structure according to claim 1, characterized in that: A plurality of inverted tooth structures (213) are axially arranged on the outer side of the expansion body (21).

6. The furniture hidden connection structure according to claim 1, characterized in that: The expansion sleeve (20) is composed of two half sleeves (23) which can be assembled left and right.

7. The furniture hidden connection structure according to claim 6, characterized in that: One side of the half-tube sleeve (23) is provided with a buckle groove ear (24), and the other side is provided with a buckle hook ear (25); the buckle hook ear (25) of one half-tube sleeve (23) can be buckled with the buckle groove ear (24) of the other half-tube sleeve (23).

8. The furniture hidden connection structure according to claim 6, characterized in that: The front and rear ends of one side of the half sleeve (23) are provided with limiting convex parts (26), and the front and rear ends of the other side are provided with limiting notches (27); the limiting convex part (26) of one half sleeve (23) can be inserted into the limiting notch (27) of the other half sleeve (23).

9. The furniture hidden connection structure according to claim 1, characterized in that: The expansion sleeve (20) extends obliquely toward the connecting rod (10) to form a main limiting ear (28); the connecting rod (10) is provided with a main limiting ring platform (14); the main limiting ear (28) can be abutted against the main limiting ring platform (14).

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