Expansion device

Abstract

The utility model discloses an expansion device. A contraction and expansion device is arranged on a sleeve or / and the tail end of the sleeve. When the contraction and expansion device is a groove strip or / and a plate strip, the groove strip or / and the plate strip is the extension of the sleeve; the sleeve and the groove strip or / and the plate strip are in one of threaded connection, integral forming, clamping connection or hinge connection; the groove strip is V-shaped, U-shaped or W-shaped, and the plate strip is linear; fillers are arranged on the groove strips or / and the plate strips; when the contraction and expansion device is a contraction and expansion strip, the same way is adopted; textures are arranged on the wall of the sleeve; according to the expansion device, a spiral piece enters the contraction and expansion device in a knocking or screwing-in mode, and when the spiral piece enters or penetrates through the contraction and expansion device, the contraction and expansion device expands. And through the arrangement of the contraction and expansion device, flexible configuration can be achieved, the contraction and expansion device can be tightly connected with the sleeve in a specific connecting mode, and the integrity and stability of the device are ensured. When the expansion device is subjected to external force, the pressure can be uniformly and effectively dispersed, so that the pressure resistance is improved, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of expansion bolts, in particular to an expansion device. Background Art

[0002] In the existing field of engineering technology, expansion devices are a key fastener whose main function is to achieve self-expansion during the installation process through a specific mechanism, thereby tightly fixing it in the preset hole and enhancing the connection strength and stability. In construction projects and daily maintenance, various objects often need to be firmly fixed to walls, floors or other structures. Traditional expansion devices have some limitations in design and application. In particular, the openness of expansion during use is not large enough, and the pulling force on porous bricks and aerated bricks does not have an ideal effect; it is often difficult to achieve an ideal fastening effect in complex and changing installation environments. In addition, the design of traditional sleeves often ignores the consideration of installation convenience and adaptability, and cannot fully meet diverse installation needs. For example, the expansion structure cannot be used with both nails and self-tapping screws. There is an urgent need to develop more convenient products.

[0003] Existing expansion devices also have some shortcomings in design and material selection. For example, the structure of the expansion and contraction parts is often relatively simple, which cannot adapt to the fixing requirements of different materials and shapes. The choice of fillers is also limited, which makes it difficult to meet the requirements of use in various environments or under various walls.

[0004] To sum up, the market urgently needs an anchoring product that can be used in similar environments, especially on weak walls such as aerated bricks and porous bricks, which can effectively improve the pull-out force, have a more reasonable expansion performance design, and have more convenient and flexible thread matching or bite performance. Utility Model Content

[0005] In view of the above problems, the present application provides an expansion device that can effectively improve the pull-out force, has a more reasonable expansion performance design, and has a more convenient and flexible thread matching or biting performance.

[0006] To achieve the above-mentioned object, the present application provides an expansion device, comprising: a sleeve;

[0007] The sleeve or / and the tail end of the sleeve are provided with a shrinkage and expansion device;

[0008] When the shrinking and expanding device is provided with one, two, or more expansion bars, one, two, or more expansion bars are provided on the sleeve or on the sleeve wall; when multiple expansion bars are provided, the expansion bars are provided in a single layer or multiple layers; the sleeve and the expansion bars are integrally formed, card-connected, or hinged; the sleeve is provided with a slot for the expansion bar to expand and contract, the slot being a groove or a hole; the expansion bar is U-shaped, V-shaped, W-shaped, or straight; the expansion bar is provided with a filler, and the filler is one or more of metal material, plastic material, wood or bamboo material, nylon material, chemical hose, carbonized wood or bamboo, and fiber;

[0009] And / or, when the shrinkage and expansion device is provided with one, two, or more grooves or / and slats, the grooves or / and slats are provided and extend from the rear end of the sleeve; the sleeve and the grooves or / and slats are connected by one of threaded connection, integral molding, card connection, or hinged connection; the grooves are V-shaped, U-shaped, or W-shaped, and the slats are straight-line shaped; the grooves or / and slats are provided with fillers, and the fillers are one or more of metal materials, plastic materials, wood and bamboo materials, nylon materials, chemical hoses, carbonized wood and bamboo, and fibers;

[0010] The sleeve wall is provided with through-hole patterns or / and pressed threads or / and internal threads or / and screw patterns generated by internal card points or / and through-hole patterns or / and pressed threads or / and internal threads or / and nail patterns or / and puncture patterns or / and screw patterns generated by internal card points provided on the expansion device; the expansion device allows the spiral member to enter the screw pattern to the expansion device by knocking or screwing, and the expansion device expands when the spiral member enters or passes through the expansion device.

[0011] In the technical solution of the embodiment of the present application, the screw pattern provided on the sleeve wall is combined with one or more screw patterns provided on the expansion device to generate a combined screw pattern. When the expansion device is provided with one or more expansion bars, the screw pattern provided on the sleeve is a ring-shaped, spiral-shaped, or dot-shaped screw pattern provided on the sleeve, or a screw pattern or an internal card point pattern provided on the longitudinal periphery of the expansion bar.

[0012] The sleeve is provided with a slot for the expansion and contraction of the expansion bar. The slot is a groove or a hole. Any side or any point of the slot is fixedly connected or integrally connected to the expansion bar. The slot is connected to one or two or more expansion bars. When there are two expansion bars, they are arranged relative to each other.

[0013] In the technical solution of the embodiment of the present application, the expansion device is used in combination with a spiral member, and one end of the spiral member is one of a bolt, a screw, a pointed nail, a sheep's head nail, a hook nail, a ball joint, a clamp, a positioning nail, a four-corner pressure nail, and a pipe clamp;

[0014] The other end of the spiral member, which is paired with the expansion device, is a bolt, a screw, a self-tapping screw, or a barbed nail or nail that is screwed into or hammered into the expansion device to expand the expansion device.

[0015] In the technical solution of the embodiment of the present application, a baffle is provided at one end of the groove or\and the slat away from the threaded connection with the sleeve or integrally formed or card-connected or hinged; or a baffle is provided at one end of the expansion strip away from the sleeve being integrally formed or card-connected or hinged.

[0016] In the technical solution of the embodiment of the present application, a return pressure strip is provided at the end of the baffle, and the return pressure strip is pressed on the V-shaped, U-shaped or W-shaped groove strip or expansion strip, or on the straight-line slat or expansion strip; the return pressure strip is used to fix the filler or\and serve as a filler to increase the expansion arc.

[0017] In the technical solution of the embodiment of the present application, the expansion strips or\and the grooves or\and the slats are provided with one or more of through-hole patterns, pressed threads, tooth patterns, nail patterns, thorn patterns, fish scale patterns, and internal card point patterns.

[0018] The edges of the expansion bar or the groove or the plate are arranged in a barbed and reverse hook style, a toothed style, a concave and convex style, a flat edge style, or a wavy style. When the expansion bar or the groove or the plate are partially or completely arranged in a barbed and reverse hook style, the expansion bar or the groove or the plate will start to act as a barb when entering the anchor hole. After the spiral member enters, the expansion bar or the groove or the plate will bite more tightly with the corresponding anchor hole wall to increase the pulling force.

[0019] In the technical solution of the embodiment of the present application, when multiple expansion strips are provided, they are provided in a single layer or in multiple layers;

[0020] When the number of the expansion bars is two, four or six and the design is single-layer, the expansion bars are arranged symmetrically; when the number of the expansion bars is three, five or seven and the design is single-layer, they are arranged in the form of a triangle, a pentagon or a heptagon;

[0021] When the expansion strips are multiple layers, and each layer has two, three, four, five, six, seven or more expansion strips, the expansion strips of each layer are staggered or arranged side by side.

[0022] In the technical solution of the embodiment of the present application, the nailing pattern, thorn pattern, fish scale pattern, pressed thread pattern, tooth pattern, through hole pattern, or internal card point pattern provided on the groove, the slat, or the expansion bar are provided on one side or on both sides. When provided on both sides, the thickness of the groove, the slat, or the expansion bar is increased to increase the expansion degree during application.

[0023] When the expansion strips are symmetrically arranged or counteracted, it is an interlocking arrangement, and the interlocking arrangement is a point-type interlocking arrangement or a wave-type interlocking arrangement.

[0024] In the technical solution of the embodiment of the present application, the expansion bar protrudes from or is flush with the slot surface where the expansion bar is placed, or is within the slot where the expansion bar is placed.

[0025] In the technical solution of the embodiment of the present application, a barb is provided at one end of the spiral member connected to the expansion device. The spiral member is aligned with the sleeve opening and hammered into the expansion device until the expansion device expands. After the barb enters the expansion device, it activates a reverse hook positioning function. The expansion device is provided with one or more combinations of internal grooves, nail patterns, puncture patterns, embossing patterns, through-hole patterns, screw patterns, and internal locking dot patterns that engage or hook with the barb. When multiple combinations are arranged in an overlapping combination, the overlapping combination is provided with nail patterns, puncture patterns, or internal locking dot patterns on the internal grooves, embossing patterns, or screw patterns.

[0026] The nailing pattern is one or more of a dot shape, a straight line shape, a triangle shape, a pentagon shape, a wave shape, a plum blossom shape, etc. The nailing pattern is combined with the corresponding screw tooth or tooth groove of the screw member. When the screw member is screwed in or knocked in and its tooth tip and the nailing pattern are in an extruded state, the limited space of the shrinking and expanding device can be expanded to the maximum extent. The nailing pattern is a through type or a non-penetrating type.

[0027] In the technical solution of the embodiment of the present application, an internal clamping point setting opening is provided on the sleeve wall or the shrinking and expanding device, the internal clamping point pattern is provided on the sleeve or the shrinking and expanding device, and the internal clamping point setting opening is provided with one or more internal clamping point patterns, and the internal clamping point patterns are provided on all sides of the internal clamping point setting opening or on any one side or more than one side thereof;

[0028] When the inner clamping point pattern is arranged downward, it is oriented toward one side of the anchor hole, and the inner clamping point is arranged vertically, obliquely, or inwardly bent.

[0029] When the internal card point setting opening is set at the sleeve opening in a notch shape, and when multiple notch-shaped internal card point setting openings are set relative to each other or in a polygonal manner, the combined generated notch array is used as a spiral point of the spiral opening.

[0030] The inner clamping point setting opening is a quadrilateral or a notch shape (gap shape).

[0031] In the technical solution of the embodiment of the present application, the expansion device is provided with one end of the expansion bar aligned with a pre-set anchor hole, and the expansion device is implanted into the anchor hole by knocking or screwing in; the end of the spiral member paired with the expansion device is aligned with the sleeve mouth exposed at the hole of the expansion device implanted into the anchor hole, and the spiral member is locked or pressed and fixed by screwing in or knocking until the expansion device expands.

[0032] In the technical solutions of the embodiments of the present application, the ends of the grooves, slats, or expansion bars connected to the sleeve and the end where the baffle is located are arranged in an L-shape, or the grooves, slats, or expansion bars connected to the sleeve are arranged in a partially inclined or head-to-tail inclined manner, with the head end being the end where the grooves, slats, or expansion bars connect to the sleeve and the tail end being the end where the baffle is located. When the grooves, slats, or expansion bars are arranged relative to each other, their bottoms may abut or interlock.

[0033] In the technical solution of the embodiment of the present application, the filler includes: an internal filler and an external filler; the external filler is provided on the groove or\and the slat or\and the expansion bar, and the internal filler is provided on the end of the expansion device close to the sleeve or / and in the sleeve.

[0034] The internal filler is one or more of wooden sticks, bamboo sticks, fibers, plastics, nylon, foam, sealant, foam glue, caulking agent and the like.

[0035] The external filler is fixed to the groove bar or the plate bar or the expansion bar in a clip-on manner or a glue-on manner or a nail-on manner.

[0036] In the technical solution of the embodiment of the present application, the material of the external filler is set according to different application substrates, and the substrate is any one of a concrete wall, a solid red brick wall, a porous red brick wall, aerated brick wall, and a rock. In the anchor hole with the concrete wall or rock as the substrate, the external filler combination is set to be easier to deform or have a larger deformation degree; in the anchor hole with the solid red brick wall, porous red brick wall, and aerated brick wall as the substrate, the external filler combination is set to be less likely to deform or not deform.

[0037] It has the following beneficial effects:

[0038] 1. An expansion device, wherein the internal card point pattern is arranged toward the tail end, that is, toward one end of the anchor hole, and is provided with a pressing piece with a threaded effect. When the screw is screwed into the pressing piece sleeve, it acts as a reverse hook, making it less likely to fall off.

[0039] 2. An expansion device can be set at any sleeve position, and a scaling device can achieve expansion at any position, which is more suitable for real-life application scenarios.

[0040] 3. An expansion device, in which an expansion block or expansion object is arranged on the expansion device, can make the corresponding anchor hole fuller, and can make the expansion device expand further, thereby improving the tensile strength of the expansion device.

[0041] 4. An expansion device that can use screws or nails, greatly expanding the scope of application. Depending on the external structure of the nail, it can also present different functions, such as bolts, screws, pointed nails, sheepshead nails, hook nails, ball joints, clamps, positioning nails, four-corner pressure nails, pipe clamps, etc., providing users with more choices and convenience, especially better anchoring effect on aerated bricks and porous bricks;

[0042] 5. An expansion device, when used in conjunction with structural adhesive, rebar adhesive, or both, can achieve even greater results. This combination can ensure a more complete sealant fill within the anchor hole. For example, an expansion device may come with a sealant, but users can pre-implant rebar adhesive to further enhance the sealant filling within the anchor hole. This combination is particularly effective, especially in weak walls such as aerated bricks and porous sub-bricks.

[0043] 6. An expansion device can expand the tail end of the expansion bar further and achieve a better fixing effect by setting the thread engagement lines on the expansion bar, groove bar and lath from deep to shallow.

[0044] 7. An expansion device sets positive and negative nail patterns on the expansion bar to make the expansion bar thicker. When the screw is screwed into the nail pattern, it will eat into the wall of the anchor hole, thereby increasing the pull-out resistance.

[0045] 8. The screw threads on the sleeve and the screw threads on the expansion device provide a more stable grip after the screw is inserted, especially the setting of the internal card dots, which has a better effect.

[0046] 9. Although the expansion device described above looks complicated, its core functional structure can be produced by die-type stamping and automated assembly line operation, which can reduce production costs and make it easier to promote and apply.

[0047] 10. The expansion device is usually arranged in the area from the front third to the front three quarters of the entire root, and the rear end, that is, the sleeve mouth, is often larger than the spiral body of the spiral part. Therefore, the spiral part has no gripping area and no balance point at the sleeve mouth. When the spiral part enters the expansion device, it is far from enough to rely solely on the gripping force of the screw pattern on the scaling expansion strip or\and the groove or\and the lath. Therefore, the internal card point pattern is arranged at the sleeve mouth, which not only improves the balance and stability of the spiral part, but also increases the gripping area, thereby improving the pulling force and safety performance.

[0048] 11. A filler is provided inside the expansion device. The filler is one or more of wood sticks, bamboo sticks, fiber, plastic, nylon, foam, sealant, foam glue, caulking agent, etc., which not only improves the grip but also reduces or eliminates the inflow of air, thereby preventing or delaying the corrosion or rusting of the expansion device, thereby improving the durability of the product.

[0049] Finally, the sleeve wall is provided with structures such as through-hole patterns, pressed threads, or screw patterns generated by internal threads. These designs not only facilitate the insertion and fixation of the screw element, but also enhance the connection and friction between the expansion device and the surrounding environment. When the screw element is screwed in, the expansion device is squeezed and expanded. This expansion effect not only increases the contact area with the surrounding environment, but also further improves the fixing effect and stability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0051] Figure 1 The pointed nail described in the specific embodiment;

[0052] Figure 2 The staples described in the specific embodiment;

[0053] Figure 3 The sheep's head nail described in the specific embodiment;

[0054] Figure 4 The bolt described in the specific embodiment;

[0055] Figure 5 The positioning nail described in the specific embodiment;

[0056] Figure 6 The hook nail described in the specific embodiment;

[0057] Figure 7The ball joint described in the specific embodiment;

[0058] Figure 8 This is a structural diagram of the grooves and slats described in the specific implementation method;

[0059] Figure 9 This is a front view of the sleeve and the expansion device described in the specific embodiment;

[0060] Figure 10 It is an axonometric view of the sleeve and the expansion device according to the specific embodiment;

[0061] Figure 11 This is a diagram showing the structure of the internal card point setting port described in the specific implementation method;

[0062] Figure 12 It is a solid diagram of the sleeve structure of a specific embodiment;

[0063] Figure 13 This is a structural diagram of the internal stuck point described in the specific implementation method;

[0064] Figure 14 A cross-sectional view of the filler and the shrinking and expanding device according to a specific embodiment;

[0065] Figure 15 This is a structural diagram of the baffle and the return pressure strip described in the specific implementation method;

[0066] Figure 16 This is a diagram of the spiral member, sleeve, expansion device and wall structure described in the specific implementation method;

[0067] Figure 17 This is a structural diagram of the spiral member and the sleeve described in the specific embodiment;

[0068] Figure 18 The inner side of the groove is provided with a nail pattern structure diagram of the specific embodiment;

[0069] Figure 19 This is a structural diagram of nail patterns on both sides of the shrinkage and expansion device described in a specific implementation method.

[0070] Description of reference numerals:

[0071] 10. Sleeve; 20. Shrinkage and expansion device; 30. Filler; 40. Screw; 50. Baffle; 60. Back pressure strip; 70. Internal card pattern;

[0072] 11. Internal card point setting port;

[0073] 21. Expansion strips; 22. Grooves; 23. Laths;

[0074] 41. Pointed nail; 42. Pin; 43. Sheep head nail; 44. Bolt; 45. Positioning nail; 46. Hook nail; 47. Ball joint; 48. Nail pattern; 49. Through hole pattern. DETAILED DESCRIPTION

[0075] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0076] See also Figures 1 to 18 , the utility model discloses an expansion device, comprising: a sleeve 10;

[0077] The sleeve 10 or / and the tail end of the sleeve 10 is provided with a shrinking and expanding device 20; the shrinking and expanding device 20 is one or more;

[0078] When the shrinkage and expansion device 20 is a groove 22 or / and a slat 23, the groove 22 or / and the slat 23 are provided and extended from the rear end of the sleeve 10; the sleeve 10 and the groove 22 or / and the slat 23 are threadedly connected, integrally formed, snap-connected, or hinged; the groove 22 is V-shaped, U-shaped, or W-shaped, and the slat 23 is straight-lined; a filler 30 is provided on the groove 22 or / and the slat 23, and the filler 30 is one or more of metal material, plastic material, wood or bamboo material, nylon material, chemical hose, carbonized wood or bamboo, and fiber;

[0079] And / or, when the shrinkage and expansion device 20 is a scaling expansion bar 21, one or more scaling expansion bars 21 are provided on the sleeve 10 or on the wall of the sleeve 10. When multiple scaling expansion bars 21 are provided, the scaling expansion bars 21 are provided in a single layer or multiple layers. The sleeve 10 and the scaling expansion bar 21 are integrally formed, card-connected, or hinged. The sleeve 10 is provided with a slot for the scaling expansion bar 21 to shrink and expand. The slot is a groove or a hole. The scaling expansion bar 21 is U-shaped, V-shaped, W-shaped, or straight. The scaling expansion bar 21 is provided with a filler 30. The filler 30 is one or more of metal material, plastic material, wood or bamboo material, nylon material, chemical hose, carbonized wood or bamboo, and fiber. The scaling expansion bar is partially or completely retracted within the slot before use.

[0080] The wall of the sleeve 10 is provided with screw patterns generated by through-hole patterns 49 and / or pressed threads and / or internal threads and / or internal card points 70, that is, they can also be understood as screw patterns generated by one or more combinations; or / and screw patterns generated by through-hole patterns 49 and / or pressed threads and / or internal threads and / or internal card points 70 provided on one or more of the shrinking and expanding devices 20; that is, they can also be understood as screw patterns generated by one or more combinations; the expansion device allows the spiral member 40 to enter the screw pattern to the shrinking and expanding device 20 by knocking or screwing, and when the spiral member 40 enters or passes through the shrinking and expanding device 20, the shrinking and expanding device 20 expands.

[0081] The sleeve 10 can be designed and manufactured according to actual needs. Its material can be metal, plastic, plastic, composite material, etc. The specific selection depends on the application scenario and the required strength, corrosion resistance and other factors.

[0082] The sleeve 10 is provided with an inner screw opening, an outer screw opening, or a notch-shaped screw opening. The purpose of providing the screw opening is to cooperate with the chemical hose and stir the chemical hose by screwing it in, so that the chemical hose can be chemically uniformly reacted and then solidified. Of course, if the glue that does not require stirring or has been stirred is used, the sleeve may not be provided with the inner screw opening, the outer screw opening, or the notch-shaped screw opening, but if it is already provided, it will not affect the use.

[0083] The inner screw mouth or the outer screw mouth is polygonal, lace-shaped or notch-shaped; the polygonal shape is one of: triangle, quadrangle, pentagon, hexagon, polygon; the lace shape is one of: three arcs, four arcs, five arcs, six arcs, polygon; the notch shape is one of: double-mouth in a straight line, three-mouth, four-mouth, five-mouth, six-mouth, multi-mouth.

[0084] Furthermore, the cross section of the sleeve 10 is triangular, quadrilateral, pentagonal, hexagonal, circular, plum blossom-shaped, or any other shape that does not affect the use.

[0085] The shrinking and expanding device 20 is composed of one section or multiple sections, and the shrinking and expanding device 20 is placed at the tail of the sleeve and on the sleeve.

[0086] The expansion and contraction device 20 is installed on the sleeve 10 and / or at its rear end. It is used to achieve the expansion function. The expansion and contraction device 20 can be one or more, depending on actual needs. The specific form of the expansion and contraction device 20 is composed of at least two or more grooves 22 and / or slats 23 and / or expansion bars 21. Furthermore, multiple expansion and contraction devices 20 can be arranged in a circular array around the central axis of the sleeve 10, so that during expansion, the expansion and contraction devices 20 expand in all directions.

[0087] When the shrinkage and expansion device 20 is a groove 22 or a slat 23, the groove 22 and the slat 23 are extensions of the sleeve 10. Specifically, the groove 22 and the slat 23 are placed at the end of the sleeve 10, and the groove 22 and the slat 23 are connected to the end of the sleeve 10. The groove 22 and the slat 23 are connected to the sleeve 10 by threaded connection, integral molding, card connection or hinged connection. The cross-section of the groove 22 can be V-shaped, U-shaped or W-shaped, and the cross-section of the slat 23 is in the shape of a straight line. The filler 30 can be provided on the groove 22 and the slat 23. The choice of the filler 30 is very wide, including metal materials, plastic materials, wood and bamboo materials, nylon materials, chemical hoses, carbonized wood and bamboo, fibers, etc. These materials can be selected and combined according to specific needs. Furthermore, the filler 30 can be placed on the side of the groove 22 and the slat 23 close to the center line of the sleeve 10 and / or on the side away from the center line; preferably, the filler 30 is placed on the side of the groove 22 and the slat 23 away from the center line of the sleeve 10.

[0088] The sidewall of the sleeve 10 is provided with an internal engagement point opening 11. Internal engagement points 70 are provided around the internal engagement point opening 11 and within the sleeve 10. These internal engagement points 70 are used to enhance the connection strength or snap-fitting strength between the screw 40 and the sleeve 10. During use, the screw 40 enters the sleeve 10 and is threadedly, snap-fitted, or snap-fitted with the internal engagement points 70. Furthermore, the internal engagement point opening 11 is preferably a square through-hole, and both the internal engagement point opening 11 and the internal engagement points 70 are formed by stamping.

[0089] When in use, the spiral member 40 enters or passes through the groove 22 and / or the plate 23 by screwing or knocking, and the groove 22 and the plate 23 expand outward to achieve an expansion effect.

[0090] When the expansion and contraction device 20 is the expansion bar 21, the expansion bar 21 is placed on the side wall of the sleeve 10. Specifically, the sleeve 10 is provided with a slot for accommodating the expansion bar 21. The expansion bar 21 is adapted to the slot and placed in the slot, and the expansion bar 21 is connected to a side edge of the slot. The spiral member 40 enters or passes through the expansion bar by screwing or knocking, and the expansion bar expands outward from the corresponding slot. The slot can be groove-shaped or hole-shaped. The expansion bar 21 can also be U-shaped, V-shaped, W-shaped, or straight-line shaped, and can also be provided with a filler 30.

[0091] It should be further explained that the expansion strip 21 is in a strip shape, and the connection between the expansion strip 21 and the sleeve 10 can also be an integral molding, a card-type connection or a hinged connection.

[0092] It can be one or more strips, and can be set to single layer or multi-layer as needed.

[0093] In addition, the wall of the sleeve 10 is provided with one or more screw patterns generated by through-hole patterns 49, pressed threads, internal threads, and internal card points. These designs are all intended to make the entry of the spiral 40 more stable. At the same time, these designs can also be applied to one or more of the shrinking and expanding devices 20 to enhance their expansion effect and fixing ability, and to achieve a better clamping effect, increase the pulling force, and be able to firmly bite the spiral so that it is not easy to fall off. Specifically, when the spiral 40 is screwed into or passes through the through-hole patterns 49 or\and the pressed threads or\and the screw patterns or\and the internal card points, the contact area between the spiral 40 and the sleeve 10 and / or the shrinking and expanding device 20 is increased, which will be safer and more secure.

[0094] During use, a screw 40 (e.g., a screw) is driven or screwed into the thread of the sleeve 10. As the screw 40 enters or passes through the expansion device 20, it is squeezed by the screw 40 and expands. This expansion is determined by the shape of the expansion device 20 and the filler 30. Because the expansion device 20 is an extension or additional portion of the sleeve 10, its expansion increases the contact area and friction with the surrounding environment, thereby achieving a secure fixation effect.

[0095] Specifically, when the spiral member 40 is hammered in or screwed in, it gradually penetrates deeper along the centerline of the sleeve 10. During this process, the expansion and contraction devices 20 (whether they are grooves 22, slats 23, or expansion strips 21) are squeezed by the spiral member 40. Because these expansion and contraction devices 20 have a certain degree of elasticity and deformability, they gradually expand along the path of the spiral member 40. This expansion effect not only increases the contact area with the surrounding environment, but also enhances the expansion force and the squeezing force, thereby ensuring a strong and secure connection between the expansion device and the surrounding environment (e.g., various walls or anchor holes made of various materials).

[0096] Furthermore, due to the flexibility in the shape of the expansion device 20 and the choice of filler 30, a customized design can be made according to different application scenarios and needs. For example, in certain applications requiring higher strength and corrosion resistance, 304 stainless steel or rubber can be selected as the filler 30.

[0097] See also Figure 12 In some embodiments, the interior of the sleeve is filled with filler or the inner wall of the sleeve is a solid structure.

[0098] Secondly, the filler 30 provided on the expansion and contraction device 20, such as metal, plastic, wood or bamboo, nylon, chemical hose, carbonized wood or bamboo, fiber, etc., not only enriches the device's functionality and performance but also adapts it to a variety of application scenarios and environmental conditions. These fillers 30 can be selected and combined according to specific needs to meet varying requirements for strength, corrosion resistance, elasticity, and deformability.

[0099] Finally, the sleeve 10 is provided with a threaded pattern, such as through-hole patterns 49, pressed threads, internal threads, or internal snap-in patterns. These features not only facilitate the insertion and fixation of the screw member 40, but also enhance the connection and friction between the expansion device and the surrounding environment. When the screw member 40 is screwed in, the expansion device 20 is squeezed and expanded. This expansion effect not only increases the contact area with the surrounding environment, but also further improves the device's fixation and stability.

[0100] It should be further explained that the expansion device is made of one or more of metal, nylon, plastic, and a hose, and the sleeve 10 is a seamless sleeve 10 or has a slit on its side wall.

[0101] Specifically, the gap of the sleeve 10 is parallel to the center line of the sleeve 10. When the screw 40 is screwed in, the sleeve 10 can also expand, thereby improving the connection strength between the sleeve 10 and the wall.

[0102] In this example, see Figure 9 、 Figure 10 as well as Figure 12 The screw pattern provided on the wall of the sleeve 10 is combined with the screw pattern provided on the one or more shrinking and expanding devices 20 to generate a combined screw pattern. When the shrinking and expanding device 20 is a zoom expansion bar 21, the screw pattern provided on the sleeve 10 is a ring-shaped, spiral-shaped, or dot-shaped screw pattern or an internal card point pattern provided on the sleeve 10, or the sleeve 10 is provided with a screw pattern on the longitudinal periphery of the zoom expansion bar 21;

[0103] The sleeve 10 is provided with a slot for the expansion bar 21 to expand and contract. The slot is a groove or a hole, and any side or point of the slot is fixedly connected or integrally connected to the expansion bar 21. Specifically, when the expansion bar 21 is placed in the slot, any position of the expansion bar 21 is connected to any edge of the slot. The slot is connected to one or more expansion bars 21, preferably two expansion bars 21, which are symmetrical vertically or horizontally. When expanded, the symmetrical expansion bars 21 bulge from the center.

[0104] Specifically, the screw threads provided on the wall of the sleeve 10 and the screw threads provided on one or more shrinkage and expansion devices 20 (such as the expansion and contraction bars 21) are combined with each other to form a combined screw thread.

[0105] This combined screw pattern design is highly flexible and can be customized to meet specific needs. For example, when the expansion device 20 is a zoom bar 21, the sleeve 10 can be provided with annular, spiral, internally-engaged, and / or dot-matrix screw patterns. These screw patterns not only enhance the connection between the sleeve 10 and the zoom bar 21 but also more evenly distribute pressure when the spiral member 40 is screwed in, thereby improving the stability and durability of the expansion device 20.

[0106] In addition, the sleeve 10 may also be provided with screw threads on the longitudinal periphery of the expansion bar 21. This design not only further strengthens the connection between the expansion bar 21 and the sleeve 10, but also makes the expansion bar 21 safer and more secure when the screw 40 is screwed in to expand.

[0107] During use, the spiral member 40 (e.g., a screw) is driven into the sleeve 10 by tapping or screwing, and contacts the screw threads on the sleeve 10. Since both the sleeve 10 wall and the expansion device 20 are provided with screw threads, the spiral member 40 simultaneously forms an extrusion-threaded connection or an extrusion-engagement connection with the screw threads of both parts when screwed in, making the spiral member 40 more stable.

[0108] As the screw 40 penetrates deeper, it gradually rotates and advances along the path of the combined screw thread. During this process, the screw 40 exerts a certain amount of thrust on the expansion bar 21, causing it to gradually expand along the slots of the sleeve 10 (the degree of expansion can be customized). This expansion effect not only increases the contact area between the expansion device 20 and the surrounding environment, but also improves friction, thereby ensuring a secure connection between the expansion device 20 and the surrounding environment.

[0109] Because the combined screw thread design is highly flexible, it can be customized to suit different application scenarios and needs. For example, in applications requiring higher strength and corrosion resistance, metal or plastic materials can be used as the filler 30 of the expansion / contraction device 20, with a tighter and more complex screw thread pattern. In applications requiring higher elasticity and deformability, nylon materials or chemical hoses can be used as the filler 30, with a looser and simpler screw thread pattern.

[0110] The combined screw thread not only enhances the connection and friction between the shrinking and expanding device 20 and the surrounding environment, but also improves its stability and durability. This design enables the shrinking and expanding device 20 to adapt to a variety of different application scenarios and needs.

[0111] In this example, see Figures 16 and 17 The expansion device is used in combination with a spiral member 40, one end of which is a bolt 44, a screw, a pointed nail 41, a sheep's head nail 43, a hook nail 46, a ball joint 47, a clamp 42, a positioning nail 45, a four-corner pressure nail, or a pipe clamp;

[0112] The other end of the spiral member 40 and the expansion device are screwed into or knocked into the expansion device 20 to expand the expansion device 20.

[0113] The screw member 40 has two ends, one end of which is connected to the sleeve 10, and the other end includes but is not limited to a bolt 44, a screw, a spike 41, a sheepshead nail 43, a hook nail 46, a ball joint 47, a clamp 42, a positioning nail 45, a four-corner pressure nail, and a pipe clamp, etc. The selection of these screw members 40 depends on the specific application scenario and fixing requirements.

[0114] During use, one end of the spiral member 40 cooperates with the sleeve 10 and enters the sleeve 10 by knocking or screwing. As the spiral member 40 gradually goes deeper, it pushes the expansion device 20 (such as the groove 22, the slat 23 or the expansion strip 21) on the expansion device to expand, thereby achieving a firm fixation to the surrounding environment.

[0115] The type and shape of the spiral member 40 can be selected based on specific needs. Therefore, the combination of the expansion device and the spiral member 40 can adapt to a variety of different application scenarios and fixing requirements. For example, in situations where quick installation and removal are required, a spiral member 40 that is easy to knock or screw in can be selected; in situations where the device needs to withstand heavy loads or vibrations, a spiral member 40 with greater strength and stability can be selected.

[0116] Specifically, one end of the spiral member 40 is connected to the expansion device, and the other end of the spiral member 40 is used to connect to the decorative panel, decorative strip, skirting or pendant connection or ornament hanging or for fixing objects:

[0117] When one end of the spiral member 40 is screwed or tapped to the expansion device to expand the contraction and expansion device 20, the other end of the spiral member 40 is set as a bolt 44, and the bolt 44 is directly locked by a nut or two nuts are used to lock the connection object or the connection hanger to fix the connection;

[0118] When one end of the spiral member 40 is screwed or hammered to the expansion device to expand the contraction and expansion device 20, and the other end of the spiral member 40 is set as a pointed nail 41, the decorative panel or decorative strip or skirting is directly hammered into the pointed nail 41 to fix the edge connection;

[0119] When one end of the spiral member 40 is screwed or hammered to the expansion device to expand the contraction and expansion device 20, the other end of the spiral member 40 is set as a sheepshead nail 43, and the decorative panel or decorative strip or skirting is hammered into the sheepshead nail 43 to fix the edge connection;

[0120] When one end of the spiral member 40 is screwed or tapped to the expansion device to expand the contraction device 20, the other end of the spiral member 40 is provided with a hook 46, on which items are hung;

[0121] When one end of the spiral member 40 is screwed or tapped to the expansion device to expand the contraction and expansion device 20, the other end of the spiral member 40 is provided with a clamping nail 42, which is clamped with an eccentric wheel provided in the decorative panel, layer or object. First, a clamping hole is provided on the decorative panel, layer or object, and an eccentric wheel is provided on the top of the clamping hole. Then, the clamping hole is aligned with the clamping nail 42 and inserted into the eccentric wheel. The eccentric wheel is tightened on the side to clamp it.

[0122] When one end of the spiral member 40 is screw-connected to the expansion device or connected by hammering to expand the contraction and expansion device 20, the other end of the spiral member 40 is provided with an extension end, and the positioning sleeve 10 is inserted into the extension end or the extension end is a connected cylinder;

[0123] When one end of the spiral member 40 is screw-connected or hammer-connected to the expansion device to expand the contraction device 20, the other end of the spiral member 40 is provided with a ball joint, and a screw inner hole is provided outside the joint for fixing the billboard. Its function is to lock and position the billboard by adjusting the corresponding screw position through the movable shaft-type joint when the anchor hole is tilted.

[0124] When one end of the spiral member 40 is screwed or hammered to the expansion device to expand the contraction device 20, the other end of the spiral member 40 is provided with four-corner pressure nails, and the four-corner pressure nails are nail heads set to a larger arbitrary shape. When the spiral member 40 is tightened, one or more decorative panels can be locked to the wall or the ground.

[0125] When one end of the spiral member 40 is screwed or hammered to the expansion device to expand the contraction device 20, the other end of the spiral member 40 is provided with a pipe clamp, which can be folded into a buckle or fixed with a corresponding model of pipe by screws.

[0126] Of course, ordinary screws, self-tapping screws or nails can also be used.

[0127] In this example, see Figure 10 、 Figure 15 as well as Figure 16The groove 22 or\and the slat 23 are provided with a baffle 50 at one end away from the sleeve 10, and the baffle 50 is used to support the filler 30 to ensure that the filler does not move easily and can be squeezed and expanded at a specified position or squeezed and deformed and expanded at a specified position; or\and the expansion bar 21 are provided with a baffle 50 at one end away from the threaded connection or integral molding or card connection or hinged connection with the sleeve 10.

[0128] The end of the baffle 50 is provided with a return pressure strip 60, which presses on the V-shaped, U-shaped or W-shaped groove 22 or the expansion strip 21, and then presses on the straight-line slat 23 or the expansion strip 21; the return pressure strip 60 is used to fix the filler 30 or serve as the filler 30, and is also used to increase the expansion arc.

[0129] In a specific implementation, when the expansion and contraction device 20 is a groove 22 or a plate 23, a baffle 50 can be provided at the end of the groove 22 or plate 23 away from the sleeve 10. The main function of the baffle 50 is to support the filler 30 to prevent the filler 30 from falling out of the groove 22 or plate 23 or to store the filler 30. The baffle 50 can be made of the same material as the groove 22 or plate 23, or other suitable materials can be selected as needed.

[0130] Similarly, when the expansion device 20 is a telescopic expansion bar 21, a baffle 50 can also be provided at the end of the telescopic expansion bar 21 away from the connection with the sleeve 10. The baffle 50 also serves to support the filler 30, ensuring that the filler 30 does not fall off during the expansion process or to store the filler 30.

[0131] Furthermore, a back pressure bar 60 may be provided at the end of the baffle 50. The main function of the back pressure bar 60 is to press against the groove bar 22, the plate bar 23, or the expansion bar 21, further securing the filler 30 and increasing the expansion arc. The back pressure bar 60 can be made of metal, plastic, or other materials with sufficient strength and elasticity.

[0132] During installation, the screw 40 is first driven into the screw thread of the expansion device by tapping or screwing it in. As the screw 40 gradually penetrates deeper, it pushes the expansion device 20 (such as the grooves 22, the slats 23, or the expansion strips 21) to expand. During this process, the baffle 50 supports the filler 30 to prevent it from falling out, while the back pressure strip 60 further secures the filler 30 and increases the expansion arc, thereby improving the fixing effect and stability of the expansion device.

[0133] Specifically, when the spiral member 40 enters the screw thread of the expansion device and pushes the contraction device 20 to expand, the baffle 50 presses against the filler 30 to prevent the filler 30 from seriously moving out of the groove 22, the slat 23 or the expansion strip 21 during the expansion process, thereby ensuring the integrity of the expansion device.

[0134] At the same time, the back pressure strip 60 presses on the groove strip 22, the slat 23 or the expansion strip 21 to further fix the filler 30. The back pressure strip 60 and the baffle 50 also increase the expansion arc of the expansion device 20, so that the expansion device 20 can better adapt to the surrounding environment and improve the fixing effect.

[0135] After the spiral member 40 completely enters the expansion device, the contraction and expansion device 20 will fully expand and form close contact with the surrounding environment. Due to the presence of the filler 30, the baffle 50, and the return pressure strip 60, the expansion device can be effectively ensured to expand or expand in a deformed manner at the designated position. Here, the return pressure strip 60 can also be used as the function of the filler 30.

[0136] The expansion effect and fixing performance of the shrinking and expanding device 20 are further optimized by adding the baffle 50 and the return pressure strip 60. This design enables the shrinking and expanding device 20 to better adapt to various complex environments and fixing requirements, and improves its reliability and durability.

[0137] In this example, see Figure 11 as well as Figure 19 The expansion strips 21 or the grooves 22 or the strips 23 are provided with one or more of through-hole patterns 49, pressed threads, tooth patterns, nail patterns 48, thorn patterns, fish scale patterns, and internal card point patterns.

[0138] The edges of the expansion strips 21, the grooves 22 and / or the strips 23 are in the form of barbs and hooks, and when the grooves 22 or the strips 23 enter the anchor holes, the barbs act to increase the pulling force.

[0139] In practice, one or more of the following designs can be provided on the expansion bars 21, grooves 22, or slats 23: through-hole patterns 49, pressed threads, tooth patterns, nail patterns 48, thorn patterns, fish scale patterns, and internal anchoring patterns. These designs can increase the expansion force between the expansion device and the corresponding anchor hole (e.g., concrete, stone, various walls, etc.), thereby improving the pull-out force and fixing effect.

[0140] Furthermore, the edges of the expansion bars 21, grooves 22, or slats 23 can be designed with barbed, reverse-hook, serrated, or wavy patterns, or a combination thereof. This design utilizes the barbs to further increase the tensile strength between the expansion device 20 and the anchor hole, thereby improving the pull-out force. The barbed, reverse-hook edges can be designed with sharp, curved, or other shapes to suit different application scenarios and substrate types.

[0141] During installation, the expansion device is first placed, hammered, or screwed into the pre-drilled anchor hole. Then, a screw 40 (such as a bolt 44 or screw) is driven or screwed into the thread pattern of the expansion device. As the screw 40 penetrates deeper, it pushes the expansion bars 21, grooves 22, or slats 23 to expand, forming a close contact with the anchor hole wall. During this process, the texture and barbed hook design work together to enhance the pull-out force and securement of the expansion device.

[0142] When the spiral member 40 enters the screw thread of the expansion device and pushes the expansion strip 21, groove 22, or plate 23 to expand, the expansion device 20 forms a close contact with the anchor hole wall. During this process, the texture (such as the through-hole pattern 49, pressed thread, tooth pattern, nail pattern 48, thorn pattern, fish scale pattern, internal card point pattern, etc.) increases the extrusion force between the expansion device and the anchor hole wall, thereby improving the pull-out force.

[0143] The barbed, reverse-hook edge design further increases the hooking force between the expansion device and the anchor hole. This design not only improves pull-out strength but also prevents the expansion device from falling out of the anchor hole when subjected to external forces.

[0144] In this example, see Figure 11 When the number of the expansion bars 21 is two, four, or six, and the design is a single layer, the multiple expansion bars 21 are arranged symmetrically; when the number of the expansion bars 21 is three, five, or seven, and the design is a single layer, they are arranged in a triangular, pentagonal, or heptagonal form;

[0145] When the expansion bars 21 are multiple layers, and each layer has two, three, five, six, or seven expansion bars 21 , the expansion bars 21 of each layer are staggered in orientation.

[0146] When the number of expansion bars 21 is two, four or six, a symmetrical layout is adopted, which means that the positions of these expansion bars 21 on the side wall of the sleeve 10 are mirror-symmetrical, ensuring that the expansion device 20 can be evenly stressed when expanding, thereby improving the fixing effect.

[0147] When the number of expansion bars 21 is three, five or seven, they are arranged in a triangular, pentagonal or heptagonal shape. This arrangement can make the expansion device 20 form a more stable structure when expanded, further improving its load-bearing capacity and pull-out resistance.

[0148] When the expansion bars 21 are multi-layered, the number of expansion bars 21 per layer can be two, three, five, six, or seven, etc. To ensure that the expansion device 20 is evenly stressed during expansion, the expansion bars 21 on each layer need to be staggered or arranged side by side. Whether a single-layer or multi-layer design is used, the operating principle of the expansion device 20 is the same. When the spiral member 40 enters the screw thread of the expansion device by tapping or screwing, it pushes the expansion bars 21 to expand. During this process, the filler 30 on the expansion bars 21 increases friction and improves the fixing effect.

[0149] For single-layer expansion and contraction devices 20, symmetrical layouts and triangular, pentagonal, and heptagonal layouts ensure uniform force distribution during expansion, preventing damage caused by excessive local force. This layout also improves the load-bearing capacity and pullout resistance of the expansion and contraction devices 20.

[0150] For a multi-layered expansion device 20, the staggered arrangement of the expansion bars 21 in each layer allows the expansion device 20 to form a more complex structure when expanded, further improving its load-bearing capacity and stability. This design allows the expansion device 20 to maintain a stable fixing effect even when subjected to heavy loads.

[0151] In this example, see Figures 10 and 11 as well as Figures 16 and 17 The nail pattern 48, thorn pattern, fish scale pattern, pressed thread, tooth pattern, or inner card point pattern on the groove 22, the lath 23, or the expansion bar 21 can be set on both sides or on one side. The double-sided setting can increase the thickness of the groove 22, the lath 23, or the expansion bar 21.

[0152] When the expansion strips 21 are symmetrically or offset, they are in an interlocking arrangement, wherein the interlocking arrangement is point interlocking, wave interlocking, or any other combination of interlocking arrangements. For example, by setting the nail patterns 48 in an interlocking arrangement, the purpose is to allow the device to expand further after expansion, i.e., to make the connection between the expansion device 20 and the wall tighter.

[0153] In practice, the aforementioned textures can be provided on both sides of the grooves 22, the slats 23, or the expansion bars 21. These textures can be produced using methods such as machining, laser etching, chemical etching, and stamping. The depth and spacing of the textures can be adjusted based on actual needs to achieve optimal expansion and load-bearing capacity.

[0154] For example, nailing patterns 48 and / or burrs can increase the thickness of the grooves 22, slats 23, and expansion strips 21, improving the expansion force relative to the surrounding environment, thereby creating greater resistance when the spiral member 40 enters, enhancing the expansion effect. Fish-scale patterns can enhance the aesthetics of the expansion device 20 while providing a certain degree of roughness. Pressed threads and tooth patterns can provide better screw-in performance and thread locking, further enhancing the fixing performance of the expansion device 20.

[0155] Furthermore, by applying these textures on both sides, the thickness of the grooves 22, slats 23, or expansion strips 21 can be increased, thereby enhancing their expansion. This not only improves pull-out strength but also expands its application range, particularly in aerated brick walls and porous brick walls. Implanting this product in these walls will yield better pull-out strength than traditional ones, providing customers with more choices.

[0156] When the screw 40 enters the screw thread of the expansion device 20 by knocking or screwing, it pushes the groove 22, the lath 23 or the expansion strip 21 to expand. In this process, the texture of the double-sided setting plays a screw connection or a clamping effect and increases the expansion force.

[0157] In this example, see Figures 10 and 11 The expansion bar 21 protrudes from or is flush with the slot where the expansion bar 21 is placed, or is within the slot where the expansion bar 21 is placed.

[0158] When the expansion bar 21 is positioned protrudingly, some or all of its volume will extend beyond the outer surface of the sleeve 10 sidewall, as long as it remains within the corresponding anchor hole. This design allows the expansion bar 21 to have a larger expansion radius when expanded, thereby providing a stronger anchoring effect. The protruding expansion bar 21 can be directly formed onto the sleeve 10 sidewall through machining, casting, injection molding, die-stamping, or other methods, or connected to the sleeve 10 through threaded connections, snap-on connections, or hinged connections.

[0159] When the expansion bar 21 is flush with the outside surface of the sleeve 10 sidewall, its outer surface is aligned with the outer surface of the sleeve 10 sidewall. This design makes the expansion device 20 more neat in appearance without adding additional space. The flush expansion bar 21 can also be directly formed on the sleeve 10 sidewall through machining, casting, injection molding, mold-type stamping, etc., or connected to the sleeve 10 through an appropriate connection method (such as a threaded connection, a snap-on connection, etc.).

[0160] When the expansion bar 21 is positioned within the slot, it is completely or partially located within the slot on the sidewall of the sleeve 10. This design makes the expansion device 20 more compact during expansion and reduces interference with the external environment. The expansion bar 21 positioned within the slot can be formed using specialized processing methods (such as die-stamping or injection molding) and connected to the sleeve 10 using an appropriate connection method (such as a hinged connection, elastic snap fastener, or integrated connection) to ensure a stable and reliable fixation during expansion.

[0161] Whether the expansion bar 21 is protruding, flush-mounted, or slotted, its operating principle remains the same. When the screw 40 is driven or screwed into the thread of the expansion device 20, it pushes the expansion bar 21 to expand. It should be noted that when the expansion bar and filler are both made of metal, the thicker the metal, the stronger the expansion force. If this expansion force is desired, the thickness of the expansion bar 21 can be reduced or the filler material can be modified.

[0162] As the spiral member 40 gradually enters, the scaling expansion bar 21 is subjected to pressure and begins to expand outward. During this process, the filler 30 (such as metal material, plastic material, etc.) on the scaling expansion bar 21 will play a role in supporting and enhancing the expansion effect. For the scaling expansion bar 21 that is placed protrudingly, its expansion radius will be larger, thereby providing a stronger fixing effect; for the scaling expansion bar 21 that is placed flush or built into the slot, although the expansion radius is relatively small, it is still possible to ensure sufficient fixing force through reasonable design and selection of fillers 30. It should be noted that when the scaling expansion bar 21 is placed protrudingly, it is set in conflict or interlocking with the opposite scaling expansion bar. After the spiral member 40 enters, the scaling expansion bar will expand wider and wider, thereby greatly improving the pulling force.

[0163] After the expansion strips 21 expand, they will squeeze and fuse or bite together with the surrounding medium (such as walls, concrete, etc.), thereby providing a reliable fixing effect. This fixing effect can withstand certain tension and pressure, ensuring that the expansion and contraction device 20 remains stable and reliable during long-term use.

[0164] When the expansion device has one end of the expansion device 20, structural glue is first attached, and the expansion device is implanted into the anchor hole by knocking or screwing. When the expansion device is a sleeve 10, the end of the expansion hole is attached with structural glue and aligned with the pre-set anchor hole, and the expansion device is implanted into the anchor hole by knocking or screwing. The end of the spiral member 40 that is paired with the expansion device is aligned with the opening of the sleeve 10 of the expansion device implanted in the anchor hole, and the spiral member is locked or pressed to a specified position by screwing or knocking. The spiral member 40 is screwed or knocked through the expansion device 20 to expand outward and then glued.

[0165] When the expansion device has one end of an expansion body, it is aligned with a pre-set anchor hole, and the anchor hole is provided with a rebar glue (directly inserted) or a chemical hose (screwed in, when the chemical hose does not need to be stirred to produce glue, it can also be directly inserted), and the expansion device is implanted into the anchor hole by knocking or screwing in, or when the expansion device is a sleeve 10, one end of the implanted anchor hole is aligned with the pre-set anchor hole, and the anchor hole is provided with a rebar glue or a chemical hose, and the expansion device is implanted into the anchor hole by knocking or screwing in; one end of the spiral member 40 paired with the expansion device is aligned with the sleeve 10 mouth of the expansion device implanted in the anchor hole, and the spiral member is locked or pressed to a specified position by screwing in or knocking, and the spiral member 40 is screwed in or knocked through the expansion device 20 to expand outward and then glued;

[0166] When one end of the expansion device has an expansion body, it is aligned with a pre-set anchor hole, and the expansion device is implanted into the anchor hole by knocking or screwing in; the spiral member 40 is matched with an expansion device and one end is aligned with the sleeve 10 mouth of the expansion body having a sleeve 10 implanted in the anchor hole, and the spiral member is locked or pressed and fixed by screwing in or knocking.

[0167] When one end of the expansion device has an expansion body, the expansion device is implanted into the anchor hole by knocking or screwing, or when the expansion device is a sleeve 10, one end of the implanted anchor hole is aligned with the pre-set anchor hole, and the expansion device is implanted into the anchor hole by knocking or screwing; the end of the spiral member 40 that is paired with the expansion device is aligned with the sleeve 10 mouth of the expansion device implanted in the anchor hole, and the spiral member is locked or pressed to a specified position by screwing or knocking. The spiral member 40 is screwed in or knocked through the expansion device 20 to expand outwards, so that the glue preset in the expansion position overflows and is then anchored and glued;

[0168] When one end of the expansion device has an expansion body, the expansion device is implanted into the anchor hole by knocking or screwing in, or when the expansion device is a sleeve 10, one end of the implanted anchor hole is aligned with the pre-set anchor hole, and the expansion device is implanted into the anchor hole by knocking or screwing in; the end of the spiral member 40 that is paired with the expansion device is aligned with the opening of the sleeve 10 of the expansion device implanted in the anchor hole, and the spiral member is locked or pressed to a specified position by screwing in or knocking, and the spiral member 40 is screwed in or knocked through the expansion device 20 to expand outward and anchor it;

[0169] In this example, see Figures 1 to 7 The end of the spiral member 40 connected to the expansion device is provided with a barb, and the spiral member 40 knocks into the end of the expansion device provided with a sleeve 10, and causes the expansion device 20 to expand. After the barb enters the expansion device 20, it starts to play a reverse hook positioning role. The expansion device 20 is provided with one or more combinations of tooth inner patterns, nail patterns 48, puncture patterns, embossing patterns, through-hole patterns 49, screw patterns, internal card points or\ and internal card point patterns 70 that cooperate with the barb.

[0170] The spiral member 40 can be made of metal, plastic, or other suitable materials. A certain number and shape of barbs can be machined on the front end of the spiral member 40 (i.e., the end connected to the expansion and contraction device 20). These barbs can be sharp protrusions, hook-like structures, or other shapes that can be firmly embedded in the expansion and contraction device 20.

[0171] At the same time, the expansion device 20 (whether it is the groove 22, the slat 23, or the expansion bar 21) on the expansion device is adjusted accordingly to form an effective fit with the barbs on the spiral member 40, but it can also be used without adjustment. Specifically, the expansion device 20 can be provided with teeth, nail patterns 48, thorn patterns, embossing patterns, through-hole patterns 49, screw patterns, and other structures that match the shape of the barbs. These structures can provide sufficient insertion space and resistance for the barbs when the spiral member 40 enters the expansion device, thereby ensuring that the spiral member 40 is firmly fixed in the expansion device 20.

[0172] When the spiral member 40 enters the screw thread of the expansion device by knocking or screwing, it pushes the expansion device 20 to expand. In this process, the barbs at the front end of the spiral member 40 will first contact the corresponding structure on the expansion device 20 (such as the inner tooth pattern, the nail pattern 48, etc.).

[0173] As the spiral member 40 gradually enters, the barbs will pass through the corresponding structures one by one into the expansion device 20, forming a strong connection, making it difficult to pull it back out. In this process, the shape and number of the barbs and the matching structure on the expansion device 20 will affect the stability and firmness of the connection.

[0174] When the spiral member 40 is completely inserted into the expansion device 20, the barbs will firmly hook the expansion device 20 to prevent it from loosening or falling off. In this way, the expansion device 20 can be firmly installed in a predetermined position, such as a wall, concrete or other substrate, through the fixing effect of the spiral member 40.

[0175] In addition, due to the presence of the barbs, even if the expansion and contraction device 20 is subjected to external impact or vibration during long-term use, the spiral member 40 can maintain a stable connection state, thereby ensuring the reliability and durability of the expansion and contraction device 20.

[0176] In this example, see Figure 11 as well as Figure 13 The sleeve 10 wall or the shrinking and expanding device 20 is provided with an internal card point setting opening 11, and the internal card point pattern 70 is provided on the sleeve 10 or the shrinking and expanding device 20. The internal card point setting opening 11 is provided with one or more internal card point patterns 70, and the internal card point patterns 70 are provided around the internal card point setting opening 11 or on any one side or more than one side thereof;

[0177] When the inner engaging dots 70 are arranged downward, the inner engaging dots 70 are arranged vertically, inclined or inwardly bent.

[0178] Furthermore, the inner clamping point pattern 70 is a sheet type or a texture type or any other shape that can be used by screws or nails to play a fastening or clamping role;

[0179] The sidewall of the sleeve 10 is provided with an internal engagement point opening 11. Internal engagement points 70 are provided around the internal engagement point opening 11 and within the sleeve 10. These internal engagement points 70 are used to enhance the connection strength between the screw 40 and the sleeve 10. During use, the screw 40 enters the sleeve 10, contacts the internal engagement points 70, and is threadedly connected thereto. Furthermore, the internal engagement point opening 11 is preferably a square through-hole, and both the internal engagement point opening 11 and the internal engagement points 70 are formed by stamping.

[0180] In this example, see Figure 16 as well as Figure 17The expansion assembly is provided with one end of the expansion bar 21 aligned with a pre-set anchor hole, and an expansion device is implanted into the anchor hole by knocking or screwing in; one end of the spiral member 40 paired with the expansion device is aligned with the expansion device and implanted into the anchor hole on the sleeve 10 exposed at the hole, and the spiral member is locked or pressed and fixed by screwing in or knocking until the expansion device 20 expands.

[0181] First, pre-set anchor holes in the substrate (e.g., wall, concrete, etc.) to be fixed. The size and depth of the anchor holes should be determined based on the specific dimensions of the expansion device and the required or theoretical fixation requirements. Next, select a suitable expansion device, ensuring that one end of its expansion bar 21 is aligned with the pre-set anchor hole.

[0182] The expansion device 20 is implanted into the anchor hole by knocking or screwing.

[0183] Align one end of the spiral member 40 that is mated with the expansion device 20 with the opening of the sleeve 10 on the expansion device 20 that is exposed at the hole.

[0184] By screwing in or knocking, the spiral member 40 is locked or compressed and fixed. In this process, the spiral member 40 gradually enters the screw thread of the shrinking and expanding device 20 and promotes the expansion bar 21 to expand.

[0185] When the spiral member 40 is completely locked or compressed, the expansion strips 21 of the expansion device 20 will fully expand, forming a violent compression with the substrate around the anchor hole, and even digging into the anchor hole wall. In this way, the expansion device 20 can be firmly fixed to the substrate, achieving the desired fixing effect.

[0186] When the spiral member 40 enters the screw thread of the expansion device 20 by screwing in or knocking, it will gradually push the expansion bar 21 to expand. In this process, the thrust of the spiral member 40 will be converted into the force that expands the expansion bar 21 outward.

[0187] As the spiral member 40 gradually enters, the expansion strip 21 is subjected to increasing pressure and begins to expand outward, especially the filling block is in a triangular shape (such as Figure 14 The arrangement shown in FIG. 2 is more suitable, and the expansion strip 21 is subjected to an increasingly greater extrusion force. In this process, the filler 30 (such as metal material, plastic material, etc.) on the expansion strip 21 can play a role in supporting and enhancing the expansion effect.

[0188] When the expansion strip 21 is fully expanded, it forms a compressive contact with the substrate surrounding the anchor hole. This compressive contact generates sufficient engagement and securing force, preventing the expansion device 20 from slipping or falling off the substrate. Simultaneously, the locking or compressing action of the spiral member 40 secures the expansion device 20 to the substrate, achieving the desired fixation effect.

[0189] In this example, see Figure 9 The end of the groove 22 or the slat 23 or the expansion strip 21 connected to the sleeve 10 and the end where the baffle 50 is set are L-shaped or partially inclined. The local part is that the end point where the groove 22 or the slat 23 is connected to the sleeve 10 is inclined or inclined from head to tail. The head end is the end where the groove 22 or the slat 23 is connected to the sleeve 10, and the tail end is the end where the baffle 50 is set.

[0190] When the end of the groove 22, slat 23, or expansion bar 21 connected to the sleeve 10 and the end where the baffle 50 is located form an L-shape, this means that a right angle or near-right angle is formed between the two parts. This design strengthens the connection between the groove 22, slat 23, or expansion bar 21 and the sleeve 10, preventing them from falling off or breaking during use. In practice, the groove 22, slat 23, or expansion bar 21 can be securely connected to the sleeve 10 through integral molding, welding, riveting, or other methods, ensuring sufficient strength and stability at the L-shaped junction.

[0191] When the local tilt is set, that is, the end points where the groove 22, the lath 23 or the expansion strip 21 are connected to the sleeve 10 are tilted or tilted head to tail. This design can make the groove 22, the lath 23 or the expansion strip 21 smoother when expanding.

[0192] In this embodiment, the filler 30 includes: an internal filler 30 and an external filler 30; the external filler 30 is provided on the groove 22 or\and the slat 23 or\and the expansion bar 21, and the internal filler 30 is provided on the end of the expansion device 20 close to the sleeve 10 or / and inside the sleeve 10.

[0193] The internal filler 30 is one or more of wood sticks, bamboo sticks, fibers, plastic, nylon, foam, etc.

[0194] The external filler 30 is fixed to the groove 22 or the plate 23 or the expansion strip 21 by a clip or glue.

[0195] The internal filler 30 is arranged at one end of the expansion device 20 close to the sleeve 10 or inside the sleeve 10. Its main function is to provide additional support and strength to ensure that the expansion device 20 can maintain a stable shape and size when expanded.

[0196] The internal filler 30 can be selected from one or more of wood sticks, bamboo sticks, fibers, plastics, nylon, foam, etc. These materials have different physical properties, such as strength, hardness, toughness, etc., and can be selected according to specific needs.

[0197] In a specific implementation, the internal filler 30 can be set inside the shrinking and expanding device 20 or the sleeve 10 by insertion, clamping, injection molding, adhesion, etc.

[0198] The external filler 30 is arranged on the groove bar 22, the lath 23 or the expansion bar 21. Its main function is to increase the friction between the expansion device 20 and the substrate, thereby improving the fixing effect.

[0199] The external filler 30 can also be made of a variety of materials, such as one or more of metal, plastic, wood, bamboo, nylon, chemical hose, carbonized wood, bamboo, fiber, etc. The selection of these materials depends on the type of substrate and the fixing requirements.

[0200] In practice, the external filler 30 can be connected to the groove 22, the slat 23, or the expansion strip 21 by means of clip-on or adhesive fixation. Clip-on fixation typically involves inserting the filler 30 into a pre-designed slot and securing it with a device such as a clip or a spring. Adhesive fixation, on the other hand, involves applying an adhesive to adhere the filler 30 to the groove 22, the slat 23, or the expansion strip 21.

[0201] When the spiral member 40 enters or passes through the expansion device 20, the expansion device 20 expands and forms a close contact with the substrate. At this time, the internal filler 30 provides additional support and strength, ensuring that the expansion device 20 can maintain a stable shape and size and prevent deformation or damage due to external forces.

[0202] In this embodiment, the material of the external filler 30 is selected according to different application substrates. If the substrate is a concrete wall, wood or\ with low density is mainly used; if the substrate is a solid red brick wall, it is used; if the substrate is a porous red brick wall, it is used; if the substrate is an aerated brick wall, it is mainly used.

[0203] Before using an expansion device, it is necessary to first identify and determine the target substrate type. Substrate types may include concrete walls, solid red brick walls, porous red brick walls, and aerated brick walls.

[0204] According to the type of substrate, select the appropriate material for the external filler 30. When the substrate is a concrete wall, since concrete has high strength and hardness, it is appropriate to select wood or bamboo materials with lower density as the external filler 30. These materials can improve the gripping force and at the same time increase the expansion force. For solid red brick walls, since the hardness and density of red bricks are moderate, materials with good compatibility with red bricks, such as nylon materials or plastic materials, can be selected. These materials can improve the gripping force. For porous red brick walls, the product of the present invention is more suitable for use. The expansion strips can be set according to the position of the holes in the porous brick wall, and can expand at the specified position. For example, metal materials or fiber materials or chemical hoses can be selected for better results. When the substrate is an aerated brick wall, since the aerated bricks have low density and are porous, it is necessary to select materials with higher density as the external filler 30 to ensure that the expansion device can be firmly fixed to the wall. Metal materials or carbonized wood bamboo and other materials are suitable choices. It should be noted that the above are only embodiments and are not intended to limit the use. The specific scope of use shall be subject to the claims, because no matter what kind of wall the filler is used for, all the materials mentioned can be used with just fewer ingredients. Therefore, the embodiments are only examples and are not intended to limit the use.

[0205] After selecting the appropriate material for the external filler 30, it needs to be mounted on the groove 22, slats 23, or expansion strips 21. This can be accomplished by clip-on fastening, adhesive fastening, or other appropriate fixing methods. By selecting the appropriate material for the external filler 30 based on the substrate type, the expansion device can better adapt to different wall types. This helps ensure that the expansion device forms a compressive contact with the substrate when expanding, providing sufficient grip.

[0206] It should be noted that, in the expansion device described in the present invention, an expansion block and a nailing pattern 48 are provided in the shrinking device of the expansion device. Through the mutual coordination and the occlusal arrangement of the nailing pattern 48, the nailing pattern 48 is not limited to the shape shown in the figure, but can also be any shape, such as: dot shape, straight shape, triangle, pentagonal shape, wave shape, etc. The nailing pattern is combined with the corresponding screw tooth or tooth groove of the screw member. When the screw member is screwed in or the nail is hammered in and its tooth tip and the nailing pattern 48 are in an extruded state, the limited space of the shrinking device can be expanded to the maximum extent, thereby achieving a better safety anchoring effect, and it will be stronger when used with glue.

[0207] It should be noted that the spiral member mentioned in the present invention should not be understood as necessarily having a screwing function. It is only a code name in the present invention for better distinction when writing. The part connected to the expansion device can be any one of bolts, screws, self-tapping screws, nails, and thorn nails (nail with barbs) or any combination of two or more. When the spiral member is a nail or a thorn nail, it is entered by knocking, not by screwing, so it is specially explained.

[0208] It should be noted that the expansion device described in the present invention is preferably produced by mold-type stamping and automated assembly line operation. Therefore, it is preferably used with an application structure and additional structure or additional materials that are suitable for mold-type stamping production and automated assembly line operation. This can reduce production costs, and low costs make it easier to promote.

[0209] It should be noted that some screw patterns are easier to understand through text, so they are not presented through graphics. Those that are more difficult to understand, such as nail patterns, internal card patterns, and through-hole patterns, are all illustrated with graphics, and the combination-specific settings that can be understood through text descriptions can also be well deduced.

[0210] It should also be noted that the spherical joint 47 can be adjusted left and right, up and down, or in a ball-and-shaft manner. Its main function is to be an expansion device. If the corresponding anchor hole is tilted, the corresponding implanted expansion device will also tilt. At this time, the screw will also tilt. Therefore, the verticality must be adjusted through the spherical joint. In particular, when a decorative panel corresponds to the screws set on four expansion devices, it is necessary to ensure that the inner thread on the spherical joint on the screw is vertically aligned with the corresponding decorative panel thread hole to ensure parallel locking. At this time, multiple ball heads can be adjusted to facilitate parallel locking of the decorative panel, which is particularly suitable for the installation and locking of billboards and plaques. It can be used when one or more anchor holes are tilted. The spiral member 40 may be provided with a spiral point on the spherical head of the spherical joint 47 assembly part. The setting of the spiral point does not affect the movement of the spherical joint 47. The component combined with the spherical head is provided with a screw inner hole, and the screw through hole passes through the spherical head, so that the spiral point set on the spherical head can be screwed to fix it, or the spiral point can be set at the bottom of the spherical head, for example: set as a square, pentagonal or hexagonal spiral point. Of course, directly knocking into the expansion device without a spiral point is also used in the technology of the utility model.

[0211] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. An expansion device comprising: The invention comprises a sleeve, characterized in that: The sleeve or / and the tail end of the sleeve are provided with a shrinkage and expansion device; When the shrinking and expanding device is provided with one, two, or more expansion bars, one, two, or more expansion bars are provided on the sleeve or on the sleeve wall; when multiple expansion bars are provided, the expansion bars are provided in a single layer or multiple layers; the sleeve and the expansion bars are integrally formed, card-connected, or hinged; the sleeve is provided with a slot for the expansion bar to expand and contract, the slot is a groove or a hole, and the expansion bar is U-shaped, V-shaped, W-shaped, or straight; the expansion bar is provided with a filler, and the filler is one or more of metal material, plastic material, wood or bamboo material, nylon material, chemical hose, carbonized wood or bamboo, and fiber; And / or, when the shrinkage and expansion device is provided with one or two or more grooves or / and slats, the grooves or / and slats are provided at the tail end of the sleeve and extend; the sleeve and the grooves or / and slats are threadedly connected, integrally formed, snap-connected or hinged; the grooves are V-shaped, U-shaped or W-shaped, and the slats are in a straight line; the grooves or / and slats are provided with fillers, and the fillers are one or more of metal materials, plastic materials, wood and bamboo materials, nylon materials, chemical hoses, carbonized wood and bamboo, and fibers.

2. An expansion device according to claim 1, characterized in that: The screw pattern provided on the sleeve wall is combined with one or more screw patterns provided on the expansion device to form a combined screw pattern. When the expansion device is provided with one or more expansion bars, the screw pattern provided on the sleeve is provided with an annular, spiral, or dot-matrix screw pattern on the sleeve, or the sleeve is provided with screw patterns or internal card dots along the longitudinal periphery of the expansion bar. The sleeve is provided with a slot for the expansion and contraction of the expansion bar. The slot is a groove or a hole. Any side or any point of the slot is fixedly connected or integrally connected to the expansion bar. The slot is connected to one or two or more expansion bars. When there are two expansion bars, they are arranged relative to each other.

3. An expansion device according to claim 1, characterized in that: The expansion device is used in combination with a spiral member, and one end of the spiral member is one of a bolt, a screw, a pointed nail, a sheep's head nail, a hook nail, a ball joint, a clamp, a positioning nail, a four-corner pressure nail, and a pipe clamp; The other end of the spiral member, that is, the end paired with the expansion device, is a bolt, a screw, a self-tapping screw, or a barbed nail or nail that is screwed into or hammered into the expansion device with the expansion device.

4. An expansion device according to claim 1, characterized in that: The groove or the plate is provided with a baffle at one end away from the end being threadedly connected to the sleeve, integrally formed, clipped or hinged; or the expansion bar is provided with a baffle at one end away from the end being integrally formed, clipped or hinged to the sleeve; The end of the baffle is provided with a return pressure strip, which is pressed on the V-shaped, U-shaped or W-shaped groove or expansion strip, or on the straight-line strip or expansion strip; the return pressure strip is used to fix the filler or\and serve as a filler to increase the expansion arc.

5. An expansion device according to claim 3, characterized in that: The expansion strips or the grooves or the slats are provided with one or more of through-hole patterns, pressed threads, tooth patterns, nail patterns, thorn patterns, fish scale patterns, and internal card point patterns; The edges of the expansion bar or the groove or the plate are arranged in a barbed and reverse hook style, a toothed style, a concave and convex style, a flat edge style, or a wavy style. When the expansion bar or the groove or the plate are partially or completely arranged in a barbed and reverse hook style, the expansion bar or the groove or the plate will start to act as a barb when entering the anchor hole. After the spiral member enters, the expansion bar or the groove or the plate will bite more tightly with the corresponding anchor hole wall to increase the pulling force.

6. An expansion device according to claim 1, characterized in that: When the expansion strips are provided as multiple strips, they are provided in a single layer or multiple layers; When the number of the expansion bars is two, four or six and the design is single-layer, the expansion bars are arranged symmetrically; when the number of the expansion bars is three, five or seven and the design is single-layer, they are arranged in the form of a triangle, a pentagon or a heptagon; When the expansion strips are multi-layered and each layer has two, three, four, five, six, seven or more expansion strips, the expansion strips of each layer are staggered or arranged side by side; The expansion bar protrudes from or is flush with the slot surface where the expansion bar is placed, or is within the slot corresponding to where the expansion bar is placed.

7. An expansion device according to claim 1, characterized in that: The nail patterns, thorn patterns, fish scale patterns, pressed threads, tooth patterns, through-hole patterns, or internal card point patterns provided on the grooves, slats, or expansion strips are single-sided or double-sided. When double-sided, the thickness of the grooves, slats, or expansion strips is increased to increase the expansion degree during use. When the expansion strips are symmetrically arranged or offsettingly arranged or interlockingly arranged, the interlocking arrangement may be point-type interlocking or wave-type interlocking.

8. An expansion device according to claim 3, characterized in that: One end of the spiral member connected to the expansion device is provided with a barb, and the spiral member is aligned with the sleeve opening and hammered into the expansion device to expand the expansion device. After the barb enters the expansion device, it starts a reverse hook positioning function. The expansion device is provided with one or more combinations of internal patterns, nail patterns, puncture patterns, embossing patterns, through-hole patterns, screw patterns, and internal card point patterns that are engaged or hooked with the barb; when multiple combinations are arranged in overlapping combinations, the overlapping combination is provided with nail patterns or\and puncture patterns or\and internal card point patterns on the internal patterns or embossing or screw patterns; The nailing pattern is one or more of the shapes of dots, lines, triangles, pentagons, waves, and plum blossoms. The nailing pattern is combined with the corresponding screw teeth or grooves of the screw member. When the screw member is screwed in or knocked in and its tooth tips and the nailing pattern are in an extruded state, the limited space of the shrinking and expanding device can be expanded to the maximum extent. The nailing pattern is a through-type or a non-penetrating type.

9. An expansion device according to claim 8, characterized in that: An inner clamping point setting opening is provided on the sleeve wall or the shrinking and expanding device, the inner clamping point pattern is provided on the sleeve or the shrinking and expanding device, the inner clamping point setting opening is provided with one or more inner clamping point patterns, and the inner clamping point patterns are provided on all sides of the inner clamping point setting opening or on any one side or more than one side thereof; When the inner clamping point pattern is set downward, it is facing the side of the anchor hole, and the inner clamping point is set vertically, inclined or bent inward; When the internal card point setting opening is set at the sleeve opening in a notch shape, and when multiple notch-shaped internal card point setting openings are set relative to each other or in a multi-angle arrangement, the combined notch array is used as a spiral point of the spiral opening; The inner clamping point setting opening is in the shape of a quadrilateral or a slot.

10. An expansion device according to claim 3, characterized in that: The expansion device is provided with one end of the expansion bar aligned with a pre-set anchor hole, and the expansion device is implanted into the anchor hole by knocking or screwing in; the end of the spiral member paired with the expansion device is aligned with the sleeve mouth exposed at the hole of the expansion device and implanted into the anchor hole, and the spiral member is locked or pressed and fixed by screwing in or knocking until the expansion device expands.

11. The expansion device according to claim 1, characterized in that: The end of the groove or the slat or the scaling expansion bar connected to the sleeve and the end where the baffle is set are L-shaped, or the groove or the slat or the scaling expansion bar are connected to the sleeve and are partially inclined or tilted head to tail, with the head end being the end where the groove or the slat is connected to the sleeve and the tail end being the end where the baffle is set; when the groove or the slat or the scaling expansion bar are arranged relative to each other, their bottoms are in abutting or interlocking arrangement.

12. The expansion device according to claim 1, characterized in that: The filler includes: internal filler and external filler; the external filler is provided on the groove or\and the slat or\and the expansion strip, and the internal filler is provided on the end of the expansion device close to the sleeve or / and in the sleeve. The internal filler is one or more of wooden sticks, bamboo sticks, fibers, plastics, nylon, foam, sealant, foam glue, and caulking agent; The external filler is fixed to the groove bar or the plate bar or the expansion bar in a clip-on manner or a glue-on manner or a nail-on manner.

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