An expansion type furniture board connection assembly

Abstract

An expansion type furniture board connection assembly includes an expansion body, a screw and a locking head. In a natural state, the screw passes through a screw guide hole, the screw thread drive part is screwed with the threaded hole of the expansion body, the screw head is supported and matched with the bottom plate of the accommodating cavity, and the elastic support part supports the locking head; the axis of the locking head coincides with the axis of the screw; in a working state, the thread drive part extends into the inverted truncated cone hole, and the expansion part expands; the head part supports and matches with the plane part, and the axis of the locking head is perpendicular to the axis of the screw. Due to the use of such a structure, the expansion body is tightly matched with the countersunk hole of the horizontal plane, and the locking head is extended into the hole of the vertical plate for locking, so the connection is firm and the operation is convenient.

Description

Technical Field

[0001] The invention relates to a furniture plate connecting device, in particular to a connecting assembly connecting a plane plate and a vertical plate. Background Art

[0002] At present, in the prior art, one way of connecting the plates is: a connecting hole is provided through the thickness of the flat plate, a fixing hole is provided on the vertical plate, and a screw is passed through the connecting hole and screwed into the fixing hole. The problem is that the connection is not firm and there are too many screws. Summary of the invention

[0003] The purpose of the present invention is to provide an expansion type furniture board connection assembly, which has the characteristics of easy use and firm connection.

[0004] The present invention is implemented as follows: an expansion type furniture board connection assembly, which includes an expansion body, a screw and a locking head.

[0005] The expansion body portion includes a cylindrical body portion at the upper part, an expansion portion at the lower part, an elastic support portion arranged at the upper part of the cylindrical body portion, a threaded hole arranged at the upper part on the axis, an inverted truncated cone-shaped hole portion at the lower part, and an axial hole communicating with the inverted truncated cone-shaped hole, and an annular protrusion is arranged on the expansion portion;

[0006] The screw includes a head, a rod and a threaded drive portion at the lower end;

[0007] The body of the locking head is cylindrical, and the two ends are arc-shaped. The locking head includes a receiving cavity with an upper opening and a side opening arranged at the upper part, tool holes are arranged on the two side wall plates of the receiving cavity, a plane part located on the side of the side opening of the receiving cavity, a screw guide hole and a guide cavity with a lower opening and a side opening, the screw guide hole passes through the bottom plate of the receiving cavity and extends to the plane part, the screw guide hole is connected with the guide cavity, and the receiving cavity and the guide cavity are on the same diameter line;

[0008] In the natural state, the screw passes through the screw guide hole, the screw thread driving part is screwed with the threaded hole of the expansion body, the head of the screw is supported and matched with the bottom plate of the accommodating cavity, and the elastic support part supports the locking head; the axis of the locking head coincides with the axis of the screw;

[0009] In the working state, the threaded driving part extends into the inverted frustum-shaped hole, and the expansion part expands; the head part and the plane part support and cooperate, and the axis of the locking head is perpendicular to the axis of the screw.

[0010] The special feature of the expandable furniture panel connection assembly is that the elastic support part includes an annular seat plate located at the upper part and a plurality of spiral bodies, the lower end of the spiral body is connected to the top of the cylindrical body of the expandable body, and the upper end is connected to the annular seat plate; the annular seat plate cooperates with the locking head.

[0011] The expansion type furniture board connection assembly is special in that the elastic support portion comprises a tube body portion and a curved elastic ring portion or a wavy elastic portion arranged on the tube body portion.

[0012] The expansion type furniture board connection assembly is special in that: there are two axial holes, which are on a diameter line; the lower part of the axial hole is provided with a vertical hole connected to the radial through hole and one end of the radial through hole and along a chord; the middle part of the radial through hole intersects with the lower part of the inverted truncated cone hole;

[0013] The bottom plate of the radial through hole cooperates with the lower end of the threaded driving part of the screw to stop.

[0014] The expansion type furniture board connection assembly is special in that: an annular baffle is provided on the screw rod, the annular baffle is located at the lower end of the rod portion of the screw rod, and the annular baffle cooperates with the elastic support portion; the axial hole passes through the lower end of the expansion portion.

[0015] The special feature of the expansion type furniture board connection assembly is that the intersection of the bottom plate and the plane portion of the accommodating cavity is rounded.

[0016] The special feature of the expansion type furniture board connection assembly is that the locking head is made of plastic material, the locking head is made of metal material by die casting, or the locking head is made of metal sheet.

[0017] The special feature of the expansion type furniture board connection assembly is that the expansion body is made of plastic material or metal material.

[0018] The special feature of the expansion type furniture board connection assembly is that anti-slip teeth are provided at both ends of the locking head.

[0019] The invention discloses an expansion type furniture board connection component. Due to the structure, the expansion body is closely matched with the countersunk hole of the horizontal plane, and the locking head is inserted into the hole of the vertical plate for locking, so the connection is firm and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a cross-sectional view of the present invention.

[0021] Figure 2 It is one of the three-dimensional exploded views of the present invention.

[0022] Figure 3 It is the second of the three-dimensional exploded diagrams of the present invention.

[0023] Figure 4 It is the front view of the present invention.

[0024] Figure 5It is a cross-sectional view of another embodiment of the expansion body portion of the present invention.

[0025] Figure 6 It is a cross-sectional view of the working state of the present invention.

[0026] Figure 7 It is a three-dimensional diagram of the working state of the present invention.

[0027] Figure 8 It is a three-dimensional exploded view of the second embodiment of the present invention.

[0028] Fig. 9 It is one of the three-dimensional views of the locking head of the present invention.

[0029] Fig.10 It is the second stereogram of the locking head of the present invention.

[0030] Fig.11 It is a three-dimensional cross-sectional view of the locking head of the present invention.

[0031] Fig.12 It is a stereogram of a second embodiment of the locking head of the present invention.

[0032] Fig.13 It is a cross-sectional view of a second embodiment of the lock of the present invention. DETAILED DESCRIPTION

[0033] The present invention will be further described below in conjunction with the accompanying drawings.

[0034] like Figure 1 As shown, an expansion type furniture board connection assembly comprises an expansion body 1, a screw rod 2 and a locking head 3.

[0035] The expansion body 1 comprises a cylindrical body 11 at the top, an expansion part 12 at the bottom, an elastic support part 13 arranged at the top of the cylindrical body, a threaded hole 14 arranged at the top on the axis, an inverted cone-shaped hole 15 at the bottom and an axial hole 16 communicating with the inverted cone-shaped hole, and an annular protrusion 121 is arranged on the expansion part 12; in the field of expansion screws, the axial hole is called a cutout;

[0036] The screw 2 includes a head 21, a rod 22 and a threaded drive portion 23 at the lower end;

[0037] The body of the locking head 3 is cylindrical, and both ends are arc-shaped. The locking head 3 includes a receiving cavity 31 with an upper opening and a side opening, a tool hole 32 is provided on the upper side wall plates of the receiving cavity, a plane portion 33 located on the side opening of the receiving cavity, a screw guide hole 34 and a guide cavity 35 with a lower opening and a side opening. The screw guide hole 34 passes through the bottom plate of the receiving cavity 31 and extends to the plane portion 33. The screw guide hole 34 is connected with the guide cavity 35. The receiving cavity 31 and the guide cavity 35 are on the same diameter line.

[0038] like Figure 1 As shown, in the natural state, the screw 2 passes through the screw guide hole 34 and the guide cavity 35, the threaded driving portion 23 of the screw 2 is screwed with the threaded hole 14 of the expansion body portion 11, the head 21 of the screw 2 is supported and matched with the bottom plate of the accommodating cavity 31, and the elastic support portion 13 supports the locking head 3; the axis of the locking head 3 coincides with the axis of the screw 2;

[0039] like Figure 6 As shown, in the working state, the threaded driving part 23 extends into the inverted frustum-shaped hole 15, and the expansion part 12 expands; the head 21 and the plane part 33 support and cooperate, and the axis of the locking head 3 is perpendicular to the axis of the screw 2.

[0040] The elastic support portion 13 includes an annular seat plate 131 at the upper portion and a plurality of spiral bodies 132 , the lower end of the spiral body 132 is connected to the top of the cylindrical body 11 of the expansion body 1 , and the upper end is connected to the annular seat plate 131 ; the annular seat plate 131 cooperates with the locking head 3 .

[0041] like Figure 5 As shown, the elastic support portion 13 includes a tube body portion 133 and a curved elastic ring portion 134 disposed on the tube body portion. Or a wave-shaped elastic portion.

[0042] There are two axial holes 16, which are on a diameter line; the lower part of the axial hole 16 is provided with a radial through hole 161 and a vertical hole 162 which is connected to one end of the radial through hole and along a chord; the middle part of the radial through hole 161 intersects with the lower part of the inverted frustum hole 15;

[0043] The bottom plate of the radial through hole 161 cooperates with the lower end of the threaded driving portion 23 of the screw rod 2 to stop.

[0044] When the present invention is used, Figure 1 , Figure 4 State, (i) insert the cylindrical body 11 of the expansion body 1 and the expansion part 12 at the bottom into the countersunk hole of the horizontal plate, (ii) use a rotating tool such as a screwdriver to rotate the screw 2, the threaded driving part 23 of the screw 2 moves in the threaded hole 14, and the lower end enters the inverted frustum-shaped hole 15, the expansion part 12 on both sides of the axial hole 16 of the expansion part 12 expands and locks with the countersunk hole; the lower end of the threaded driving part 23 cooperates with the bottom plate of the radial through hole 161 to stop; (iii) Figure 1 , Figure 4 In the state shown, the locking head 3 is inserted into the connecting hole of the vertical plate, the rotating tool is inserted into the tool hole 32, and rotated clockwise, the head 21 of the screw 2 slides with the bottom plate of the accommodating cavity 31, and the rod 22 moves in the screw guide hole 34; then the head 21 is locked with the flat part 33, as shown in FIG. Figure 6 , Figure 7 Status shown.

[0045] like Figure 8 As shown, the screw is provided with an annular baffle 24, which is located at the lower end of the rod portion 22 of the screw 2, and cooperates with the elastic support portion 13; the axial hole 16 passes through the lower end of the expansion portion 12. The screw adopts such a structure, and the annular baffle 24 cooperates with the elastic support portion 13 to stop.

[0046] The intersection between the bottom plate of the accommodating cavity 31 and the flat surface 33 is rounded.

[0047] The locking head 3 is made of plastic material; the locking head 3 can also be made of metal material by die casting;

[0048] like Fig.12 , Fig.13 As shown, the locking head 3 is made of a metal sheet body.

[0049] The expansion body 1 is made of plastic material or metal material.

[0050] The above is only a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, which are also considered as the protection scope of the present invention.

Claims

1. An expansion type furniture board connection assembly, characterized in that: It includes an expansion body, a screw and a locking head. The expansion body portion includes a cylindrical body portion at the upper part, an expansion portion at the lower part, an elastic support portion arranged at the upper part of the cylindrical body portion, a threaded hole arranged at the upper part on the axis, an inverted truncated cone-shaped hole portion at the lower part, and an axial hole communicating with the inverted truncated cone-shaped hole, and an annular protrusion is arranged on the expansion portion; The screw includes a head, a rod and a threaded drive portion at the lower end; The body of the locking head is cylindrical, and the two ends are arc-shaped. The locking head includes a receiving cavity with an upper opening and a side opening arranged at the upper part, tool holes are arranged on the two side wall plates of the receiving cavity, a plane part located on the side of the side opening of the receiving cavity, a screw guide hole and a guide cavity with a lower opening and a side opening, the screw guide hole passes through the bottom plate of the receiving cavity and extends to the plane part, the screw guide hole is connected with the guide cavity, and the receiving cavity and the guide cavity are on the same diameter line; In the natural state, the screw passes through the screw guide hole, the screw thread driving part is screwed with the threaded hole of the expansion body, the head of the screw is supported and matched with the bottom plate of the accommodating cavity, and the elastic support part supports the locking head; the axis of the locking head coincides with the axis of the screw; In the working state, the threaded driving part extends into the inverted frustum-shaped hole, and the expansion part expands; the head part and the plane part support and cooperate, and the axis of the locking head is perpendicular to the axis of the screw; There are two axial holes, which are on a diameter line; a radial through hole and a vertical hole connected to one end of the radial through hole and along a chord are provided at the lower part of the axial hole; the middle part of the radial through hole intersects with the lower part of the inverted frustum hole; The bottom plate of the radial through hole cooperates with the lower end of the threaded driving portion of the screw to stop; The screw rod is provided with an annular baffle, which is located at the lower end of the rod portion of the screw rod and cooperates with the elastic support portion; the axial hole passes through the lower end of the expansion portion.

2. The expansion type furniture board connection assembly according to claim 1, characterized in that: The elastic support part includes an annular seat plate located at the upper part and a plurality of helical bodies, the lower end of the helical body is connected to the top of the cylindrical body of the expansion body, and the upper end is connected to the annular seat plate; the annular seat plate cooperates with the locking head.

3. The expansion type furniture board connection assembly according to claim 1, characterized in that: The elastic support portion comprises a tube body portion and a curved elastic ring portion or a wave-shaped elastic portion arranged on the tube body portion.

4. The expansion type furniture board connection assembly according to claim 1, characterized in that: The intersection of the bottom plate and the flat surface of the accommodating cavity is rounded.

5. An expansion type furniture board connection assembly according to claim 1, 2, 3 or 4, characterized in that: The locking head is made of plastic material, the locking head is made of die-cast metal material, or the locking head is made of metal sheet.

6. The expansion type furniture board connection assembly according to claim 5, characterized in that: The expansion body is made of a plastic material or a metal material.

7. An expansion type furniture board connection assembly according to claim 1, 2, 3 or 4, characterized in that: Anti-slip teeth are arranged at both ends of the locking head.

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