Expandable furniture screw

Abstract

The utility model relates to the technical field of screws, in particular to an expandable furniture screw which comprises a screw rod and an expansion shell, the outer side wall of the screw rod is movably connected with the expansion shell, a plurality of side grooves are evenly formed in the side wall of the expansion shell, a movable shell is arranged in the front end of the expansion shell, and the movable shell is connected with the expansion shell. And the movable shell is in threaded connection with the screw rod. Through the arrangement of the expansion shell, the movable shell, the movable rod, the triangular groove and the positioning rod, the movable shell moves in a meshed mode through rotation of the screw rod in the using process, the movable shell moves towards an inner cavity of the expansion shell, so that the expansion shell expands, positioning and fixing are achieved, the movable shell drives the movable rod to move, and the position of the triangular groove is changed through movement of the movable rod; and the positioning rod can extend out of the expansion shell from the side groove and abut against the inner wall of the mounting groove, secondary positioning and fixing are achieved, and firmness and stability of furniture mounting are effectively improved. The utility model has the advantage of firm and stable installation.

Description

Technical Field

[0001] The utility model relates to a screw, in particular to an expandable furniture screw. Background Art

[0002] During the decoration process, it is often necessary to fixedly install furniture on the wall or the ground to achieve the functions of decoration or convenient use. In the prior art, screws are often used for the fixed installation of furniture.

[0003] Currently, most of the furniture fixing operations use expansion screws. When the traditional expansion screw is used, its shell deforms to achieve fixation, and it only completes locking through the action of friction. The locking measure is relatively single and the reliability is limited. Moreover, when the existing expansion screw is used, it is impossible to control the number of turns of the screw rotation. If the number of turns is too many, it is easy to cause damage to the thread, resulting in a reduction in the fixing reliability or being not conducive to the later disassembly operation, and it is not convenient to use. Therefore, the utility model provides an expandable furniture screw. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides an expandable furniture screw, which overcomes the deficiencies of the prior art.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] An expandable furniture screw includes a screw rod, an expansion shell is movably connected to the outer side wall of the screw rod, a plurality of side grooves are uniformly distributed and opened on the side wall of the expansion shell, a movable shell is arranged inside the front end of the expansion shell, the movable shell is threadedly connected with the screw rod, a limiting plate is fixedly connected to the outer side wall of the movable shell, the limiting plate is inserted into the side groove, a movable rod is movably connected to the inner side wall of the movable shell, a round hole is opened at the center of the side wall of the screw rod close to the movable shell, the movable rod is inserted into the inner cavity of the round hole and is movably connected with the round hole, a plurality of triangular grooves are uniformly distributed on the side wall of the movable rod, a positioning rod is movably connected in each triangular groove, and the positioning rod penetrates through the side wall of the screw rod and is movably connected with the screw rod.

[0007] As a preferred technical solution of the utility model, the inner side wall of the expansion shell close to the movable shell is inclined, and the outer side wall of the movable shell close to the expansion shell is inclined.

[0008] As a preferred technical solution of the utility model, inclined grooves are opened on the inner side walls of the triangular grooves, a connecting block is fixedly connected to one end of the positioning rod close to the movable rod, and the connecting block is movably connected with the inclined groove.

[0009] As a preferred technical solution of the present utility model, the positioning rod is cylindrical, and one end of the positioning rod away from the movable rod is conical.

[0010] As a preferred technical solution of the present utility model, a circular groove is provided at the center of the inner side wall of the movable shell. One end of the movable rod close to the movable shell is fixedly connected with a circular block, and the circular block is movably connected with the circular groove.

[0011] As a preferred technical solution of the present utility model, a plurality of anti-slip blocks are evenly distributed and fixedly connected to the outer side wall of the expansion shell, and the anti-slip blocks are triangular.

[0012] As a preferred technical solution of the present utility model, an anti-slip pad is fixedly connected to the side wall of the limiting plate away from the movable shell.

[0013] The embodiment of the present utility model provides an expandable furniture screw, which has the following beneficial effects:

[0014] 1. By providing an expansion shell, a movable shell, a movable rod, a triangular groove and a positioning rod, when in use, the rotation of the screw rod meshes with the movement of the movable shell, and the movable shell moves into the inner cavity of the expansion shell, so that the expansion shell expands to achieve positioning and fixing. And the movement of the movable shell drives the movement of the movable rod, and the movement of the movable rod changes the position of the triangular groove, so that the positioning rod can extend out of the expansion shell from the side groove and press tightly against the inner wall of the installation groove to achieve secondary positioning and fixing, effectively improving the reliability and stability of furniture installation;

[0015] 2. By providing a movable shell, a screw rod and a movable rod, when the screw rod is rotated, the movable shell drives the movement of the movable rod. When the movable shell moves to one end of the screw rod, the movable rod also moves to one end position inside the circular hole, which can realize the positioning of the position of the movable shell and complete the positioning of the screw rod, avoiding thread damage caused by excessive rotation of the screw rod and facilitating stable use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. They are used together with the embodiments of the present utility model to explain the present utility model, and do not constitute a limitation to the present utility model. In the drawings:

[0017] Figure 1 is the front three-dimensional structure schematic diagram of the present utility model;

[0018] Figure 2 is the side three-dimensional structure schematic diagram of the present utility model;

[0019] Figure 3 is the internal three-dimensional structure schematic diagram of the present utility model;

[0020] Figure 4 It is a three-dimensional structural schematic diagram of the screw of the present utility model;

[0021] Figure 5 It is a three-dimensional structural schematic diagram of the movable shell of the present utility model.

[0022] In the figure: 1. Screw; 2. Expansion shell; 3. Side groove; 4. Movable shell; 5. Limit plate; 6. Movable rod; 7. Round hole; 8. Triangular groove; 9. Positioning rod; 10. Inclined groove; 11. Connecting block; 12. Round groove; 13. Round block; 14. Anti-slip block; 15. Anti-slip pad. Specific embodiments

[0023] The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present utility model, and are not used to limit the present utility model.

[0024] Embodiment: As Figures 1-5 shown, an expandable furniture screw includes a screw 1. An expansion shell 2 is movably connected to the outer side wall of the screw 1. A plurality of side grooves 3 are evenly distributed and opened on the side wall of the expansion shell 2. A movable shell 4 is arranged inside the front end of the expansion shell 2. The movable shell 4 is threadedly connected to the screw 1. By rotating the screw 1, the movement of the movable shell 4 is driven to realize the expansion of the expansion shell 2, so as to realize installation and fixation, and the movement of the movable shell 4 can be positioned through the movable shell 4 to avoid damage to the internal thread, and the use effect is good;

[0025] Among them, the inner side wall of the expansion shell 2 close to the movable shell 4 is inclined, and the outer side wall of the movable shell 4 close to the expansion shell 2 is inclined, which is convenient for the movement of the movable shell 4;

[0026] Among them, a plurality of anti-slip blocks 14 are evenly distributed and fixedly connected to the outer side wall of the expansion shell 2. The anti-slip blocks 14 are triangular in shape, which improves the reliability of the installation of the device;

[0027] Among them, an anti-slip pad 15 is fixedly connected to the side wall of the limit plate 5 away from the movable shell 4, which improves the installation stability of the movable shell 4 and is convenient for driving the movement of the movable shell 4 through the screw 1;

[0028] A limiting plate 5 is fixedly connected to the outer side wall of the movable shell 4. The limiting plate 5 is inserted into the side groove 3. The inner side wall of the movable shell 4 is movably connected to a movable rod 6. A circular hole 7 is opened at the center of the side wall of one end of the screw rod 1 close to the movable shell 4. The movable rod 6 is inserted into the inner cavity of the circular hole 7 and is movably connected to the circular hole 7. A plurality of triangular grooves 8 are evenly distributed on the side wall of the movable rod 6. A positioning rod 9 is movably connected to each of the triangular grooves 8. The positioning rod 9 penetrates through the side wall of the screw rod 1 and is movably connected to the screw rod 1. By driving the movable rod 6 to move through the movable shell 4, the positioning rod 9 can be inserted into the inner wall of the preset installation groove, realizing re-installation and fixation, and improving the installation reliability and stability.

[0029] Wherein, inclined grooves 10 are opened on the inner side walls of the triangular grooves 8. A connecting block 11 is fixedly connected to one end of the positioning rod 9 close to the movable rod 6. The connecting block 11 is movably connected to the inclined groove 10, which can make the positioning rod 9 move stably.

[0030] Wherein, the positioning rod 9 is cylindrical, and one end of the positioning rod 9 far from the movable rod 6 is conical, which is convenient for realizing fixed use and improving the positioning reliability.

[0031] Wherein, a circular groove 12 is opened at the center of the inner side wall of the movable shell 4. A circular block 13 is fixedly connected to one end of the movable rod 6 close to the movable shell 4. The circular block 13 is movably connected to the circular groove 12, which is convenient for driving the movable rod 6 to move.

[0032] Working principle: When the device of the present utility model is in use, first, installation grooves are opened on the wall surface and the furniture board. The device is inserted into the installation groove on the wall surface from the installation groove on one side of the furniture board. Then, an external tool is used to rotate the screw rod 1. The rotation of the screw rod 1 meshes with the rotation of the movable shell 4. The movable shell 4 continuously moves towards the inner cavity of the expansion shell 2. The movable shell 4 is used to squeeze and expand the expansion shell 2, so that the expansion shell 2 and the anti-slip block 14 are closely attached to the inner wall of the installation groove, realizing installation positioning. And by driving the movable rod 6 to move through the movable shell 4, the position of the triangular groove 8 is changed by the movement of the movable rod 6. The connecting block 11 on the positioning rod 9 moves in the inclined groove 10. When the movable shell 4 moves to one end position of the screw rod 1, at this time, the positioning rod 9 penetrates out from the position of the side groove 3 on the side wall of the expansion shell 2, so that the positioning rod 9 is pressed against the inner wall of the installation groove, realizing re-installation positioning, which can effectively improve the installation reliability and stability of the furniture. And because the movable shell 4 moves to one end position of the screw rod 1, at this time, the movable shell 4 is closely attached to the screw rod 1, making the screw rod 1 stop rotating, which can effectively avoid the damage of the internal thread caused by excessive rotation of the screw rod 1, and the use effect is good.

[0033] Finally, it should be noted that in the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "vertical", "upper", "lower", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0034] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0035] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An expandable furniture screw, comprising a screw rod (1), characterized in that: An expansion shell (2) is movably connected to the outer wall of the screw (1), and a plurality of side grooves (3) are evenly distributed on the side wall of the expansion shell (2). A movable shell (4) is arranged in the front end of the expansion shell (2), and the movable shell (4) is threadedly connected to the screw (1). A limit plate (5) is fixedly connected to the outer wall of the movable shell (4), and the limit plate (5) is inserted into the side groove (3). The inner wall of the movable shell (4) is movably connected to a movable rod (6). A circular hole (7) is opened at the center of the side wall of one end of the movable shell (4) near the movable shell (4), and the movable rod (6) is inserted into the inner cavity of the circular hole (7) and is movably connected to the circular hole (7). A plurality of triangular grooves (8) are evenly distributed on the side wall of the movable rod (6), and positioning rods (9) are movably connected in the triangular grooves (8). The positioning rod (9) passes through the side wall of the screw (1) and is movably connected to the screw (1).

2. The expandable furniture screw according to claim 1, characterized in that: The inner side wall of the expansion shell (2) close to the movable shell (4) is arranged at an inclination, and the outer side wall of the movable shell (4) close to the expansion shell (2) is arranged at an inclination.

3. The expandable furniture screw according to claim 1, characterized in that: The inner side walls of the triangular grooves (8) are each provided with an oblique groove (10); one end of the positioning rod (9) close to the movable rod (6) is fixedly connected with a connecting block (11); and the connecting block (11) is movably connected to the oblique groove (10).

4. The expandable furniture screw according to claim 1, characterized in that: The positioning rod (9) is arranged in a cylindrical shape, and the end of the positioning rod (9) away from the movable rod (6) is arranged in a conical shape.

5. The expandable furniture screw according to claim 1, characterized in that: A circular groove (12) is provided at the center of the inner side wall of the movable shell (4); a round block (13) is fixedly connected to one end of the movable rod (6) close to the movable shell (4); and the round block (13) is movably connected to the circular groove (12).

6. The expandable furniture screw according to claim 1, characterized in that: A plurality of anti-sliding blocks (14) are evenly distributed and fixedly connected to the outer side wall of the expansion shell (2), and the anti-sliding blocks (14) are arranged in a triangular shape.

7. The expandable furniture screw according to claim 1, characterized in that: An anti-slip pad (15) is fixedly connected to the side wall of the limiting plate (5) away from the movable shell (4).

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