Expansion device

Abstract

The invention 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 invention relates to the technical field of expansion bolts, and 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, so as to be tightly fixed in the preset holes and enhance the connection strength and stability. In construction projects and daily maintenance, various objects often need to be firmly fixed on walls, floors or other structures. Traditional expansion devices have some limitations in design and application, especially the lack of openness of expansion during use, 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 changeable installation environments. In addition, the design of traditional sleeves often ignores the consideration of installation convenience and adaptability, and cannot fully meet the diverse installation needs. For example, the expansion structure cannot be used with nails or self-tapping screws, and there is an urgent need to develop more convenient products.

[0003] There are also some deficiencies in the design and material selection of existing expansion devices. For example, the structure of the expansion and contraction part is often relatively simple and cannot meet the fixing requirements of different materials and shapes; the choice of fillers is also limited and it is difficult to meet the use requirements in various environments or under various walls.

[0004] To sum up, the market urgently needs an anchoring product that can effectively improve the pull-out force, has a more reasonable expansion performance design, and has more convenient and flexible thread matching or bite performance for use in similar environments, especially on weak walls such as aerated bricks and porous bricks. Summary of the invention

[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 anchoring product with thread matching or biting performance.

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

[0007] The sleeve or / and the tail end of the sleeve is 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 the expansion bars are provided with multiple expansion bars, 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 slots for the expansion bars to expand and contract, the slots are slots or holes, and the expansion bars are U-shaped, V-shaped, W-shaped or straight-lined; the expansion bars 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;

[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 arranged at the rear end of the sleeve and extend; the sleeve and the grooves or / and slats are threadedly connected, integrally formed, card-connected or hinged; the grooves are V-shaped, U-shaped or W-shaped, and the slats are straight-lined; fillers are provided on the grooves or / and slats, 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 pressed threads, / or internal threads, / or screw patterns generated by internal clamping points, / or through hole patterns, / or pressed threads, / or internal threads, / or nail hammer patterns, / or puncture patterns, / or screw patterns generated by internal clamping points, / or screw patterns formed on the expansion device; the expansion device allows a 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 arranged on the sleeve wall is combined with one or more screw patterns arranged on the expansion device to generate a combined screw pattern. When the expansion device is provided with one or more zoom expansion strips, the screw pattern arranged on the sleeve is a ring-type or a spiral-type or a dot-matrix-type screw pattern arranged on the sleeve or a screw pattern or an inner card dot pattern arranged on the longitudinal periphery of the zoom expansion strip;

[0012] The sleeve is provided with a slot hole for the expansion and contraction of the expansion bar, the slot hole is a groove or a hole, any side or any point of the slot hole is fixedly connected or integrally connected to the expansion bar, the slot hole is connected with one or two or more expansion bars, and when the expansion bars are set to two, 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 or a screw or a self-tapping screw or a barbed nail or a nail that enters the expansion device through screwing or knocking into the contraction and expansion device to expand the contraction and 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 the slat away from the threaded connection with the sleeve or integrally formed or snap-connected or hinged; or a baffle is provided at one end of the expansion strip away from the sleeve integrally formed or snap-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 as a filler to increase the expansion arc.

[0017] In the technical solution of the embodiment of the present application, the expansion strip or\and the groove strip or\and the lath are provided with one or more of through hole pattern, pressed thread, tooth pattern, nail pattern, thorn pattern, fish scale pattern and internal card point pattern.

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

[0019] In the technical solution of the embodiment of the present application, when the expansion strips are provided in multiple pieces, 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 a single layer, the expansion bars are arranged symmetrically; when the number of the expansion bars is three, five or seven and the design is a single layer, the expansion bars are arranged in a triangular, pentagonal or heptagonal form;

[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 nail pattern, thorn pattern, fish scale pattern, pressed thread, tooth pattern, through hole pattern, or internal card point pattern arranged on the groove or the slat or the expansion strip are arranged on one side or on both sides. When the double-sided arrangement is arranged, the thickness of the groove or the slat or the expansion strip is increased to increase the expansion degree during application;

[0023] When the expansion strips are symmetrically arranged or opposed to each other, it is an interlocking arrangement, and the interlocking arrangement is a point-type interlocking arrangement or a wave-type interlocking arrangement or any other combination of interlocking arrangements.

[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 corresponding to 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, and the spiral member is knocked into the expansion device by aligning with the sleeve opening to expand the shrinking device. After the barb enters the shrinking device, it starts the reverse hook positioning function, and the shrinking device is provided with one or more combinations of inner patterns, nail patterns, puncture patterns, embossing patterns, through-hole patterns, screw patterns, and inner card point patterns that are engaged or hooked with the barb. When multiple combinations are arranged in overlapping combinations, the overlapping combination is arranged to have nail patterns or\and puncture patterns or\and inner card point patterns on the inner patterns or embossing patterns or screw patterns.

[0026] The nailing pattern is one or more of a dot shape, a straight line shape, a triangle, a pentagon, a wave shape, a plum blossom shape, etc., or can be set to any shape. 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 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 around the inner clamping point setting opening or on any one side or more than one side;

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

[0029] When the inner card point setting opening is set at the sleeve opening in a notch shape, and when multiple notch-shaped inner card point setting openings are set relatively 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 (notch shape) or other arbitrary shapes.

[0031] In the technical solution of the embodiment of the present application, the expansion device is provided with one end of the expansion strip aligned with a pre-set anchor hole, and the expansion device is implanted into the anchor hole by knocking or screwing in; one 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 solution of the embodiment of the present application, the end of the groove or the plate or the expansion strip connected to the sleeve is L-shaped with the end where the baffle is set, or the groove or the plate or the expansion strip is partially inclined with the sleeve or inclined at the head and tail, the head end is the end of the groove or the plate connected to the sleeve, and the tail end is the end where the baffle is set. When the groove or the plate or the expansion strip is relatively set, the bottoms thereof are set in a conflicting or bite-fitting manner.

[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 strip, and the internal filler is provided at one 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, sealants, foam glue, caulking agents, etc.

[0035] The external filler is fixed to the groove bar or the plate bar or the expansion bar by a clip type fixation or a glue type fixation or a nail type fixation.

[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 concrete wall, solid red brick wall, porous red brick wall, aerated brick wall, and 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 inner card point pattern is arranged toward the tail end, that is, toward one end of the anchor hole, and is arranged to form a pressing piece with a threaded effect. When the screw is screwed into the pressing piece sleeve, it acts as a reverse hook and is less likely to fall off.

[0039] 2. An expansion device can be set at any sleeve position, and a scaling device can achieve the expansion effect 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 can use screws or nails, which greatly expands the scope of application. It can also present different functions according to the external structure of the nail, such as bolts, screws, pointed nails, sheep head 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, which is better when used in combination with structural adhesive or\ and anchor glue or / and adhesive or / and adhesive, can make the saturation of the adhesive in the anchor hole more full. For example: an expansion device comes with adhesive, but in order to make the adhesive in the anchor hole more full, the user can pre-implant the anchor glue, so that the combination is more 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 clamping effect by setting the thread engagement lines on the expansion bar, groove bar and plate bar 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 anti-pullout effect.

[0045] 8. The screw patterns on the sleeve and the shrinking and expanding device provide a more stable grip after the screw is inserted, especially the setting of the inner card point pattern, which has a better effect.

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

[0047] 10. The expansion device described in the invention is usually arranged in the area from the front third to the front three quarters of the entire root, and the rear end, i.e., the sleeve mouth, is often larger than the spiral body of the spiral element. Therefore, the spiral element has no gripping area and no balancing point at the sleeve mouth. When the spiral element 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 the groove or the lath. Therefore, an internal card point pattern is arranged at the sleeve mouth, which not only improves the balance and stability of the spiral element, but also increases the gripping area, thereby improving the pulling force and safety performance.

[0048] 11. Fillers are arranged inside the expansion device. The internal fillers are one or more of wooden sticks, bamboo sticks, fibers, plastics, nylon, foam, sealant, foam glue, caulking agent, etc., which not only improve the gripping force, but also reduce the inflow of air or prevent the entry of air, so that the expansion device will not be corroded or delayed from being corroded or rusted, thereby improving the durability of the product.

[0049] Finally, structures such as through-hole patterns, pressed threads or screw patterns generated by internal threads are provided on the sleeve wall. These designs not only facilitate the entry and fixation of the spiral element, but also enhance the connection and friction between the expansion device and the surrounding environment. When the spiral element is screwed in, the shrinking and expanding device will be 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 of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, 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 implementation method;

[0052] Figure 2 The stapler described in the specific implementation manner;

[0053] Figure 3 The sheep head nail described in the specific implementation manner;

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

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

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

[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] Fig. 9 It is a front view of the sleeve and the shrinking and expanding device described in the specific implementation method;

[0060] Fig.10 It is an axonometric view of the sleeve and the shrinking and expanding device described in the specific implementation method;

[0061] Fig.11 It is a structural diagram of the internal card point setting port described in the specific implementation method;

[0062] Fig.12 It is a solid diagram of the sleeve structure of a specific implementation method;

[0063] Fig.13 It is a structural diagram of the internal stuck point described in the specific implementation method;

[0064] Fig.14 It is a cross-sectional view of the filler and the shrinking and expanding device of a specific implementation method;

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

[0066] Fig.16 The spiral member, sleeve, shrinkage and expansion device and wall structure diagram described in the specific implementation method;

[0067] Fig.17 This is a structural diagram of the spiral member and the sleeve described in the specific implementation method;

[0068] Fig.18 The inner side of the groove is provided with a nail pattern structure diagram of the specific implementation method;

[0069] Fig.19 This is a specific implementation method in which nail-hammering patterns are arranged on both sides of the shrinking and expanding device.

[0070] Description of reference numerals:

[0071] 10. sleeve; 20. shrinkage and expansion device; 30. filler; 40. spiral member; 50. baffle; 60. back pressure strip; 70. inner card point pattern;

[0072] 11. Internal card point setting port;

[0073] 21. expansion strip; 22. groove strip; 23. lath;

[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 in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0076] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0077] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0078] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0079] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0080] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0081] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0082] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0083] See also Figures 1 to 18 , the present invention discloses an expansion device, comprising: a sleeve 10;

[0084] 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;

[0085] 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 arranged at the rear end of the sleeve 10 and extend; the sleeve 10 and the groove 22 or / and the slat 23 are threadedly connected, integrally formed, card-connected or hinged; the groove 22 is V-shaped, U-shaped or W-shaped, and the slat 23 is in a straight line shape; the groove 22 or / and the slat 23 are provided with a filler 30, and the filler 30 is one or more of metal materials, plastic materials, wood and bamboo materials, nylon materials, chemical hoses, carbonized wood and bamboo, and fibers;

[0086] And / or, when the shrinkage and expansion device 20 is a zoom expansion strip 21, one or more zoom expansion strips 21 are provided on the sleeve 10 or on the wall of the sleeve 10, and when multiple zoom expansion strips 21 are provided, the zoom expansion strips 21 are provided in a single layer or a multi-layer arrangement; the sleeve 10 and the zoom expansion strip 21 are one of integrally formed, card-connected or hinged, and the sleeve 10 is provided with a slot for the zoom expansion strip 21 to be shrunk and expanded, and the slot is a slot or a hole, and the zoom expansion strip 21 is U-shaped, V-shaped, W-shaped or straight-lined; a filler 30 is provided on the zoom expansion strip 21, and the filler 30 is one or more of metal material, plastic material, wood and bamboo material, nylon material, chemical hose, carbonized wood and bamboo, and fiber; the zoom expansion strip is partially or completely shrunk within the slot before use.

[0087] 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 clamping point patterns 70, that is, it 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 clamping point patterns 70 arranged on one or more of the shrinking and expanding devices 20; that is, it 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.

[0088] The sleeve 10 can be designed and manufactured according to actual needs, and its material can be metal, plastic, composite material, etc. The specific selection depends on the application scenario and the required strength, corrosion resistance and other factors.

[0089] The sleeve 10 is provided with an inner screw opening, an outer screw opening or a notch screw opening; the purpose of providing the screw opening is to cooperate with the chemical hose, stir the chemical hose by screwing it in, so that the chemical hose can be chemically uniformly reacted and then glued. Of course, if the glue that does not need to be stirred or has been stirred is used, the sleeve may not be provided with an inner screw opening, an outer screw opening or a notch screw opening, but if it is already provided, it will not affect the use;

[0090] The inner screw mouth or the outer screw mouth is polygonal, lace-shaped or notched; the polygon is one of a triangle, a quadrangle, a pentagon, a hexagon, and a polygon; the lace is one of a three-arc shape, a four-arc shape, a five-arc shape, a six-arc shape, and a polygon; the notch is one of a double-mouth shape, a three-mouth shape, a four-mouth shape, a five-mouth shape, a six-mouth shape, and a multi-mouth shape.

[0091] Furthermore, the cross section of the sleeve 10 is a triangle, a quadrilateral, a pentagon, a hexagon, a circle, a plum blossom, or any other shape that does not affect the use.

[0092] The shrinking and expanding device 20 is one section or multiple sections, and the shrinking and expanding device 20 is placed at the tail of the sleeve and on the sleeve.

[0093] The expansion and contraction device 20 is provided on the sleeve 10 and / or at its tail end, and the expansion and contraction device 20 is used to realize the expansion function. The expansion and contraction device 20 can be one or more, and is configured according to actual needs. The specific form of the expansion and contraction device 20 is generated by at least two or more grooves 22 and / or slats 23 and / or expansion strips 21. Further, the expansion and contraction devices 20 can be arranged in a circular array around the central axis of the sleeve 10, so that when expanding, the expansion and contraction device 20 expands to the surroundings.

[0094] 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 set 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.

[0095] The side wall of the sleeve 10 is provided with an inner clamping point setting opening 11; the inner clamping point pattern 70 is provided around the inner clamping point setting opening 11 and inside the sleeve 10, and the inner clamping point pattern 70 is used to improve the connection strength or clamping strength between the spiral member 40 and the sleeve 10. When in use, the spiral member 40 enters the sleeve 10 and is threadedly connected, clamped or bitten with the inner clamping point pattern 70. Further, the inner clamping point setting opening 11 is preferably a square through hole, and the inner clamping point setting opening 11 and the inner clamping point pattern 70 are formed by stamping.

[0096] 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.

[0097] When the shrinkage and expansion 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 hole for accommodating the expansion bar 21, the expansion bar 21 is adapted to the slot hole, and the expansion bar 21 is placed in the slot hole, and the expansion bar 21 is connected to a side edge of the slot hole. 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 hole, and the slot hole can be slot-shaped or hole-shaped. The shape of the expansion bar 21 can also be U-shaped, V-shaped, W-shaped or straight-shaped, and a filler 30 can also be provided.

[0098] It should be further explained that the expansion strip 21 is in strip shape, and the expansion strip 21 and the sleeve 10 may also be connected in an integral manner, a card-type connection or a hinged manner.

[0099] It can be one or more strips, and can be set to single layer or multi-layer as needed.

[0100] 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 point patterns. These designs are all for making the spiral member 40 more stable after entering. 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 can achieve better clamping effect, improve pulling force, and can firmly bite the spiral member so that it is not easy to fall off. Specifically, when the spiral member 40 is screwed into or passes through the through-hole pattern 49 or\and the pressed thread or\and the screw pattern or\and the internal card point pattern, the contact area between the spiral member 40 and the sleeve 10 and / or the shrinking and expanding device 20 is increased, which will be safer and more secure.

[0101] When in use, the spiral member 40 (such as a screw) enters the screw thread on the sleeve 10 by knocking or screwing. When the spiral member 40 enters or passes through the shrinking and expanding device 20, the shrinking and expanding device 20 will be squeezed by the spiral member 40 and expand. The expansion effect is determined by the shape of the shrinking and expanding device 20 and the filler 30. Since the shrinking and expanding device 20 is an extension or additional part of the sleeve 10, their expansion will increase the contact area and friction with the surrounding environment, thereby achieving a firm fixing effect.

[0102] Specifically, when the spiral member 40 is knocked in or screwed in, it will gradually go deeper along the center line of the sleeve 10. In this process, the shrinking and expanding devices 20 (whether it is the groove 22, the slat 23 or the expansion strip 21) will be squeezed by the spiral member 40. Since these shrinking and expanding devices 20 have a certain elasticity and deformability, they will 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 increases the expansion force and the extrusion force, thereby ensuring a violent and firm connection between the expansion device and the surrounding environment (such as various walls or anchor holes of various materials).

[0103] In addition, due to the flexibility of the shape of the shrinking and expanding device 20 and the selection of the filler 30, a customized design can be made according to different application scenarios and needs. For example, in some occasions where higher strength and corrosion resistance are required, 304 stainless steel or rubber can be selected as the filler 30.

[0104] See also Fig.12 In some embodiments, the interior of the sleeve is filled with a filler or the inner wall of the sleeve is a solid structure.

[0105] Secondly, the fillers 30 provided on the shrinking and expanding device 20, such as metal materials, plastic materials, wood and bamboo materials, nylon materials, chemical hoses, carbonized wood and bamboo, fibers, etc., not only enrich the functions and performance of the device, but also enable it to adapt to a variety of different application scenarios and environmental conditions. These fillers 30 can be selected and combined according to specific needs to meet different requirements for strength, corrosion resistance, elasticity, deformability, etc.

[0106] Finally, the wall of the sleeve 10 is provided with a through hole pattern 49 or a pressed thread or an internal thread or a screw pattern generated by an internal card point pattern. These designs not only facilitate the entry and fixation of the spiral member 40, but also enhance the connection force and friction between the expansion device and the surrounding environment. When the spiral member 40 is screwed in, the shrinking and expanding device 20 will be 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.

[0107] It should be further explained that the expansion device is one or more of metal material, nylon material, plastic material, and hose, and the sleeve 10 is a seamless sleeve 10 or a gap is arranged on the side wall of the sleeve 10 .

[0108] 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.

[0109] In this example, see Fig. 9 , Fig.10 as well as Fig.12 The screw pattern arranged on the wall of the sleeve 10 is combined with the screw pattern arranged 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 strip 21, the sleeve 10 is provided with a screw pattern, which is a ring-shaped, spiral-shaped, or dot-shaped screw pattern or an inner card dot pattern on the sleeve 10, or the sleeve 10 is provided with a screw pattern on the longitudinal periphery of the zoom expansion strip 21;

[0110] The sleeve 10 is provided with a slot for the expansion bar 21 to expand and contract. The slot is a slot or a hole. Any side or any 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 with one or more expansion bars 21. Preferably, there are two expansion bars 21, and the two expansion bars 21 are symmetrical up and down or left and right. When expanding, the expansion bars 21 symmetrical up and down or left and right bulge from the middle.

[0111] Specifically, the screw thread provided on the wall of the sleeve 10 is combined with the screw thread provided on one or more shrinkage and expansion devices 20 (such as expansion and contraction expansion strips 21) to form a combined screw thread.

[0112] The design of this combined screw pattern is very flexible and can be customized according to actual needs. For example, when the shrinking and expanding device 20 is a zoom expansion bar 21, a ring-shaped, spiral-shaped, inner-point-shaped and / or dot-shaped screw pattern can be provided on the sleeve 10. These screw patterns not only enhance the connection force between the sleeve 10 and the zoom expansion bar 21, but also enable the spiral member 40 to disperse the pressure more evenly when screwing in, thereby improving the stability and durability of the shrinking and expanding device 20.

[0113] In addition, the sleeve 10 may also be provided with screw threads on the longitudinal periphery of the expansion strip 21. This design not only further strengthens the connection between the expansion strip 21 and the sleeve 10, but also makes the expansion strip 21 more secure and secure when the spiral member 40 is screwed in to expand.

[0114] When in use, the spiral member 40 (such as a screw) enters the sleeve 10 by knocking or screwing in, and contacts the screw threads on the sleeve 10. Since the sleeve 10 wall and the shrinking and expanding device 20 are both provided with screw threads, the spiral member 40 will be simultaneously connected with the screw threads of the two parts by extrusion threading or extrusion bite when screwing in, making the spiral member 40 more stable.

[0115] As the spiral 40 gradually goes deeper, it will gradually rotate and move forward along the path of the combined screw pattern. In this process, the spiral 40 will generate a certain thrust on the expansion strip 21, causing the expansion strip 21 to gradually expand along the slot of the sleeve 10 (the expansion degree can be customized according to demand). This expansion effect not only increases the contact area between the expansion device 20 and the surrounding environment, but also increases its friction, thereby ensuring a firm connection between the expansion device 20 and the surrounding environment.

[0116] Since the design of the combined screw thread is very flexible, it can be customized according to different application scenarios and needs. For example, in some occasions where higher strength and corrosion resistance are required, metal or plastic materials can be selected as the filler 30 of the shrinking and expanding device 20, and a tighter and more complex screw thread can be set; while in occasions where higher elasticity and deformability are required, nylon materials or chemical hoses can be selected as the filler 30, and a looser and simpler screw thread can be set.

[0117] The combined screw thread not only enhances the connection force 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 requirements.

[0118] In this example, see Figure 16 to Figure 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, and a pipe clamp;

[0119] The other end of the spiral member 40 and the expansion device are screwed into or knocked into the contraction and expansion device 20 to expand the contraction and expansion device 20.

[0120] The spiral member 40 has two ends, one end is used to connect with the sleeve 10, and the other end includes but is not limited to bolts 44, screws, pointed nails 41, sheepshead nails 43, hook nails 46, ball joints 47, clamps 42, positioning nails 45, four-corner pressure nails and pipe clamps, etc. The selection of these spiral members 40 depends on the specific application scenario and fixing requirements.

[0121] When in use, one end of these spiral members 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.

[0122] The type and shape of the spiral member 40 can be selected according to specific needs, so 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 disassembly are required, a spiral member 40 that is easy to knock or screw in can be selected; and in situations where a large load or vibration needs to be withstood, a spiral member 40 with higher strength and stability can be selected.

[0123] 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 hanging part or to hang ornaments or to fix objects:

[0124] When one end of the spiral member 40 is screwed or tapped 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 bolt 44, the bolt 44 is directly locked by a nut or two nuts are used to lock the connection object or the connection hanger for fixed connection;

[0125] 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;

[0126] 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 sheep head nail 43, and the decorative panel or decorative strip or skirting is hammered into the sheep head nail 43 to fix the edge connection;

[0127] 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 hook nail 46, on which an object is hung;

[0128] 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 a veneer, a layer board or an article. A clamping hole is first provided on the veneer, a layer board or an article, 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, and the eccentric wheel is tightened on the side to clamp it.

[0129] 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 an extension end, and the positioning sleeve 10 is inserted into the extension end or the extension end is a connected cylinder;

[0130] 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 ball joint, and a screw inner hole is provided outside the joint to fix the billboard. Its function is to lock and position the billboard by adjusting the corresponding screw position through the movable shaft joint when the anchor hole is tilted.

[0131] 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.

[0132] 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 pipe clamp, which can be closed with a buckle or fixed with a corresponding model of pipe by screws.

[0133] Of course, it can also be the application of ordinary screws or self-tapping screws or nails.

[0134] In this example, see Fig.10 , Fig.15 as well as Fig.16 The groove 22 or the slat 23 is provided with a baffle 50 at one end away from the sleeve 10, and the baffle 50 is used to resist 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 the expansion strip 21 is provided with a baffle 50 at one end away from the sleeve 10 threaded connection, integral molding, card connection or hinged connection.

[0135] The end of the baffle 50 is provided with a return pressure strip 60, which is pressed on the V-shaped, U-shaped or W-shaped groove strip 22 or the expansion strip 21, and then pressed on the straight-line strip 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.

[0136] In a specific implementation, when the shrinking and expanding device 20 is a slot 22 or a slat 23, a baffle 50 may be provided at one end of the slot 22 or the slat 23 away from the sleeve 10. The main function of the baffle 50 is to resist the filler 30 to prevent the filler 30 from falling off from the slot 22 or the slat 23 or to store the filler 30. The baffle 50 may be made of the same material as the slot 22 or the slat 23, or other suitable materials may be selected as needed.

[0137] Similarly, when the expansion device 20 is a zoom expansion bar 21, a baffle 50 can also be provided at the end of the zoom expansion bar 21 away from the connection with the sleeve 10. The baffle 50 also serves to resist the filler 30, ensure that the filler 30 does not fall off during the expansion process, or store the filler 30.

[0138] In addition, a back pressure strip 60 may be provided at the end of the baffle 50. The main function of the back pressure strip 60 is to press on the groove strip 22, the plate strip 23 or the expansion strip 21 to further fix the filler 30 and increase the expansion arc. The back pressure strip 60 may be made of metal material, plastic material or other material with sufficient strength and elasticity.

[0139] During installation, the spiral member 40 is first inserted into the screw thread of the expansion device by knocking or screwing. As the spiral member 40 gradually goes deeper, it pushes the shrinking and expanding device 20 (such as the groove 22, the plate 23 or the expansion strip 21) to expand. In this process, the baffle 50 will press against the filler 30 to prevent it from falling off, and the back pressure strip 60 will further fix the filler 30 and increase the expansion arc, thereby improving the fixing effect and stability of the expansion device.

[0140] 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 from the groove 22, the slat 23 or the expansion strip 21 during the expansion process, thereby ensuring the integrity of the expansion device.

[0141] At the same time, the back pressure strip 60 will press on the groove strip 22, the strip 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.

[0142] After the spiral member 40 completely enters the expansion device, the contraction and expansion device 20 will be completely expanded and form a close contact with the surrounding environment. Due to the existence of the filler 30 and the combined effect of the baffle 50 and the back pressure strip 60, it can effectively ensure that the expansion device expands or expands in a deformed manner at a specified position. Here, the back pressure strip 60 can also be used as the function of the filler 30.

[0143] By adding the baffle 50 and the back pressure strip 60, the expansion effect and fixing performance of the shrinking and expanding device 20 are further optimized. 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.

[0144] In this example, see Fig.11 as well as Fig.19The expansion strip 21 or the groove strip 22 or the strip 23 are provided with one or more of through hole pattern 49, pressed thread, tooth pattern, nail pattern 48, thorn pattern, fish scale pattern and inner card point pattern.

[0145] The edges of the expansion strip 21, the groove 22 and / or the strip 23 are in the form of barbs and hooks, and when the groove 22 or the strip 23 enters the anchor hole, the barbs act to increase the pulling force.

[0146] In specific implementation, one or more of through hole pattern 49, pressed thread, tooth pattern, nail pattern 48, thorn pattern, fish scale pattern, inner card point pattern, etc. can be set on the expansion bar 21, groove bar 22 or plate bar 23. These designs can increase the expansion force of the expansion device and the corresponding anchor hole (such as concrete, stone, various walls, etc.), thereby improving the pulling force and fixing effect.

[0147] In addition, the edges of the expansion strips 21, the grooves 22 or the slats 23 may be designed to be one or more combinations of barbed hooks, sawtooth patterns or wavy patterns. This design can further increase the tensile strength of the anchor hole of the substrate by the barb effect when the expansion device 20 enters the anchor hole, thereby improving the pulling force. The barbed hook edge can be designed to be sharp, curved or in other shapes to adapt to different application scenarios and substrate types.

[0148] During installation, the expansion device is first placed or knocked into or screwed into the pre-drilled anchor hole, and then the spiral member 40 (such as a bolt 44, a screw, etc.) is knocked or screwed into the screw thread of the expansion device. As the spiral member 40 gradually goes deeper, it pushes the expansion strip 21, the groove strip 22 or the lath 23 to expand and form a close contact with the anchor hole wall. In this process, the texture and the barbed hook design work together to improve the pull-out force and fixing effect of the expansion device.

[0149] When the spiral member 40 enters the screw thread of the expansion device and pushes the expansion strip 21, the groove strip 22 or the plate strip 23 to expand, these expansion devices 20 will form a close contact with the anchor hole wall. In this process, the texture (such as through hole texture 49, pressed thread, tooth texture, nail pattern 48, thorn texture, fish scale texture, internal card point texture, etc.) will increase the extrusion force between the expansion device and the anchor hole wall, thereby improving the pulling force.

[0150] At the same time, the barbed reverse hook edge design will further increase the hook force with the anchor hole of the substrate by using the barb effect when the expansion device enters the anchor hole. This design can not only increase the pulling force, but also prevent the expansion device from falling off from the anchor hole when subjected to external force.

[0151] In this example, see Fig.11When the number of the expansion bars 21 is two, four or six and the design is a single layer, the 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, the expansion bars 21 are arranged in a triangular, pentagonal or heptagonal form;

[0152] When the expansion and contraction expansion bars 21 are multiple layers, and each layer has two, three, five, six, or seven expansion and contraction expansion bars 21, the expansion and contraction expansion bars 21 of each layer are staggered in orientation.

[0153] When the number of expansion bars 21 is two, four or six, a symmetrical layout is adopted, which means that the positions of the expansion bars 21 on the side wall of the sleeve 10 are mirror-symmetrical, so as to ensure that the expansion device 20 can be evenly stressed when expanding, thereby improving the fixing effect.

[0154] When the number of the expansion bars 21 is three, five or seven, a triangle, pentagon or heptagonal layout is adopted. This layout can make the expansion device 20 form a more stable structure when expanded, and further improve its bearing capacity and pull-out resistance.

[0155] When the expansion strips 21 are designed in multiple layers, the number of expansion strips 21 in each layer can be two, three, five, six or seven. In order to ensure that the expansion device 20 can be evenly stressed when expanding, the expansion strips 21 of each layer need to be staggered or arranged side by side. Whether it is a single-layer design or a multi-layer design, the working principle of the expansion device 20 is the same. When the spiral member 40 enters the screw thread of the expansion device by knocking or screwing, it pushes the expansion strip 21 to expand. In this process, the filler 30 on the expansion strip 21 will increase the friction and improve the fixing effect.

[0156] For the single-layer expansion device 20, the symmetrical layout and the triangular, pentagonal, and heptagonal layout can ensure that the expansion device 20 can be evenly stressed when expanding, avoiding damage caused by excessive local stress. At the same time, this layout can also improve the bearing capacity and pull-out resistance of the expansion device 20.

[0157] For the multi-layered expansion device 20, the staggered arrangement of the expansion strips 21 of each layer can make the expansion device 20 form a more complex structure when expanded, further improving its bearing capacity and stability. This design can make the expansion device 20 still maintain a stable fixing effect when bearing a large load.

[0158] In this example, see Figure 10 to Figure 11 as well as Figure 16 to Figure 17The nail pattern 48 or the thorn pattern or the fish scale pattern or the pressed thread or the tooth pattern or the inner card point pattern on the groove 22 or the lath 23 or the expansion strip 21 is set on both sides or on one side, and the double-sided setting can increase the thickness of the groove 22 or the lath 23 or the expansion strip 21;

[0159] When the expansion strips 21 are symmetrically or offset, it is an interlocking setting, which may be a point-type interlocking setting, a wave-type interlocking setting, or any other interlocking combination. For example, by setting the nail pattern 48 in an interlocking manner, the purpose is to allow the device to expand further after expansion, that is, to make the connection between the expansion device 20 and the wall tighter.

[0160] In specific implementation, the above textures can be respectively provided on both sides of the groove bar 22, the plate bar 23 or the expansion bar 21. These textures can be made by mechanical processing, laser etching, chemical etching, stamping forming and the like. The depth and spacing of the textures can be adjusted according to actual needs to achieve the best expansion effect and load-bearing capacity.

[0161] For example, the provision of nailing patterns 48 and / or thorn patterns can increase the thickness of the grooves 22, the laths 23, and the expansion strips 21, and improve the expansion force with the surrounding environment, thereby generating greater resistance when the spiral member 40 enters, and increasing the expansion effect. Fish scale patterns can increase 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 effect, and further enhance the fixing performance of the expansion device 20.

[0162] In addition, by setting these textures on both sides, the thickness of the groove 22, the lath 23 or the expansion strip 21 can be increased, thereby increasing its expansion degree. This can not only increase the pulling force, but also make its application range wider, especially aerated brick walls and porous brick walls. The pulling force of the product implanted on the wall will be better than that of the traditional one, giving customers more choices.

[0163] When the spiral member 40 enters the screw thread of the shrinking and expanding device 20 by knocking or screwing, it pushes the slot bar 22, the lath 23 or the expansion bar 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 effect.

[0164] In this example, see Figure 10 to Figure 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.

[0165] When the expansion bar 21 is placed protrudingly, part or all of the volume of the expansion bar 21 will exceed the outer surface of the side wall of the sleeve 10, as long as it enters the corresponding anchor hole without being affected. This design can make the expansion bar 21 have a larger expansion radius when it expands, thereby providing a stronger fixing effect. The protruding expansion bar 21 can be directly formed on the side wall of the sleeve 10 by machining, casting or injection molding, mold stamping, etc., or connected to the sleeve 10 by threaded connection, card connection or hinged connection.

[0166] When the expansion strip 21 is placed flush, its outer surface is consistent with the outer surface of the side wall of the sleeve 10. This design can make the expansion device 20 more neat in appearance, and will not increase the additional space occupation. The expansion strip 21 placed flush can also be directly formed on the side wall of the sleeve 10 by machining, casting or injection molding, mold stamping, etc., or connected to the sleeve 10 by an appropriate connection method (such as threaded connection, card connection, etc.).

[0167] When the expansion bar 21 is built into the slot, the expansion bar 21 is completely or partially located inside the slot on the side wall of the sleeve 10. This design can make the expansion device 20 more compact when expanded, and also helps to reduce interference with the external environment. The expansion bar 21 built into the slot can be formed by a special processing method (such as mold stamping, injection molding, etc.), and connected to the sleeve 10 by an appropriate connection method (such as hinge, elastic buckle, integrated, etc.) to ensure that it can maintain a stable and reliable fixing effect when expanded.

[0168] Whether the expansion bar 21 is protruding, placed flush or built into the slot, the working principle is the same. When the spiral member 40 enters the screw thread of the expansion device 20 by knocking or screwing, it pushes the expansion bar 21 to expand. It should be noted that the expansion bar plus the filler, when all are metal, the thicker the thickness, the stronger the expansion force; if the expansion force is weak, the thickness of the expansion bar 21 can be reduced or the material of the filler can be changed.

[0169] As the spiral member 40 gradually enters, the 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 expansion bar 21 will play a role in supporting and enhancing the expansion effect. For the expansion bar 21 that is placed protrudingly, its expansion radius will be larger, thereby providing a stronger fixing effect; for the 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 expansion bar 21 is placed protrudingly, it is set in conflict or bite with the opposite expansion bar. After the spiral member 40 enters, the expansion bar will expand wider, thereby greatly improving the pulling force.

[0170] After the expansion strip 21 expands, it will be squeezed and fused or bitten together with the surrounding medium (such as wall, concrete, etc.), thereby providing a reliable fixing effect. This fixing effect can withstand a certain tension and pressure, ensuring that the expansion device 20 remains stable and reliable during long-term use.

[0171] When the expansion device has one end of the shrinking device 20, the structural glue is first attached, and the expansion device is implanted into the anchor hole by knocking or screwing, or when the expansion device is a sleeve 10, the structural glue is attached to the end implanted into the anchor hole 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 matched with the expansion device is aligned with the mouth of the sleeve 10 of the expansion device implanted in the anchor hole, and the spiral member is locked or pressed to the specified position by screwing or knocking, and the spiral member 40 is screwed or knocked through the shrinking device 20 to expand outward and then glued;

[0172] 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 reinforcing glue (directly inserted) or a chemical hose (screwed in, when the chemical hose does not need to be stirred and can be glued, it can also be directly inserted), and the expansion device is implanted in 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 reinforcing glue or a chemical hose, and the expansion device is implanted in the anchor hole by knocking or screwing in; one end of the spiral member 40 matched 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 shrinking and expanding device 20 to expand outward and then glued;

[0173] 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 one end of the expansion device and aligned with the sleeve 10 mouth of the expansion body with sleeve 10 implanted in the anchor hole, and the spiral member is locked or pressed and fixed by screwing in or knocking.

[0174] 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 implanted into the anchor hole is aligned with the pre-set anchor hole, and the expansion device is implanted into the anchor hole by knocking or screwing; one end of the spiral member 40 matched with the expansion device is aligned with the mouth 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, and the spiral member 40 is screwed or knocked through the shrinking and expanding device 20 to expand outwards until the glue preset at the expansion position overflows and then the anchor is fixed;

[0175] 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; one end of the spiral member 40 matched with the expansion device is aligned with the mouth 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, and the spiral member 40 is screwed or knocked through the expansion device 20 to expand outward and anchor;

[0176] 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 to expand the shrinking device 20. After the barb enters the shrinking device 20, it starts the reverse hook positioning effect. The shrinking 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.

[0177] The spiral member 40 can be made of metal, plastic or other suitable materials. A certain number and shape of barbs can be processed at the front end of the spiral member 40 (i.e., the end connected to the shrinking and expanding device 20). These barbs can be sharp protrusions, hook-shaped structures or other shapes that can be firmly embedded in the shrinking and expanding device 20.

[0178] At the same time, the expansion device 20 (whether it is the groove 22, the slat 23 or the expansion strip 21) on the expansion device is adjusted accordingly to form an effective match with the barb on the spiral member 40, and can be used without adjustment. Specifically, the expansion device 20 can be provided with structures such as tooth inner pattern, nail pattern 48, thorn pattern, embossing pattern, through hole pattern 49, screw pattern, etc. that match the shape of the barb. These structures can provide sufficient embedding space and resistance for the barb when the spiral member 40 enters the expansion device, thereby ensuring that the spiral member 40 can be firmly fixed in the expansion device 20.

[0179] When the spiral member 40 enters the screw thread of the expansion device by knocking or screwing, it pushes the shrinking and expanding 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 shrinking and expanding device 20 (such as the inner tooth thread, the nail thread 48, etc.).

[0180] As the spiral member 40 gradually enters, the barbs will pass through one corresponding structure after another into the inside of the shrinking and expanding device 20, forming a firm connection, and it is difficult to pull it back out. In this process, the shape and number of the barbs and the matching structure on the shrinking and expanding device 20 will affect the stability and firmness of the connection.

[0181] When the spiral member 40 completely enters the shrinking and expanding device 20, the barbs will firmly hook the shrinking and expanding device 20 to prevent it from loosening or falling off. In this way, the shrinking and expanding device 20 can be firmly installed at a predetermined position, such as a wall, concrete or other substrate, through the fixing effect of the spiral member 40.

[0182] In addition, due to the presence of the barbs, even if the shrinking and expanding 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 shrinking and expanding device 20.

[0183] In this example, see Fig.11 as well as Fig.13 The inner clamping point setting opening 11 is provided on the wall of the sleeve 10 or the shrinking and expanding device 20, and the inner clamping point pattern 70 is provided on the sleeve 10 or the shrinking and expanding device 20. The inner clamping point setting opening 11 is provided with one or more inner clamping point patterns 70, and the inner clamping point patterns 70 are provided around the inner clamping point setting opening 11 or on any one side or more than one side;

[0184] When the inner engaging point pattern 70 is arranged downward, the inner engaging point pattern 70 is arranged vertically, inclined or bent inwardly.

[0185] 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;

[0186] The side wall of the sleeve 10 is provided with an inner clamping point setting opening 11; the inner clamping point pattern 70 is provided around the inner clamping point setting opening 11 and inside the sleeve 10, and the inner clamping point pattern 70 is used to improve the connection strength between the spiral member 40 and the sleeve 10. When in use, the spiral member 40 enters the sleeve 10, can contact the inner clamping point pattern 70, and is threadedly connected to the inner clamping point pattern 70. Further, the inner clamping point setting opening 11 is preferably a square through hole, and the inner clamping point setting opening 11 and the inner clamping point pattern 70 are formed by stamping.

[0187] In this example, see Fig.16 as well as Fig.17 The expansion assembly is provided with one end of the expansion strip 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.

[0188] First, pre-set anchor holes on the substrate to be fixed (such as walls, concrete, etc.). The size and depth of the anchor holes should be determined according to the specific size of the expansion device and the fixing requirements or theoretical requirements. Next, select a suitable expansion device to ensure that one end of its expansion bar 21 is aligned with the pre-set anchor hole.

[0189] The shrinkage and expansion device 20 is implanted into the anchor hole by knocking or screwing.

[0190] Align the end of the spiral member 40 that matches the expansion device 20 with the opening of the sleeve 10 on the expansion device 20 that is exposed at the hole.

[0191] By screwing in or knocking, the spiral member 40 is locked or pressed and fixed. In this process, the spiral member 40 gradually enters the screw thread of the shrinking and expanding device 20 and pushes the expansion strip 21 to expand.

[0192] When the spiral member 40 is completely locked or compressed, the expansion strip 21 of the shrinking and expanding device 20 will fully expand, forming a violent squeeze with the substrate around the anchor hole, and even eating into the anchor hole wall. In this way, the shrinking and expanding device 20 can be firmly fixed on the substrate to achieve the expected fixing effect.

[0193] When the spiral member 40 enters the screw thread of the shrinking and expanding 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 for the expansion bar 21 to expand outward.

[0194] 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 Fig.14 The arrangement shown in FIG. 2 is more suitable, and the expansion strip 21 will be 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 will play a role in supporting and enhancing the expansion effect.

[0195] When the expansion strip 21 is fully expanded, it will form a squeeze contact with the substrate around the anchor hole. This squeeze contact can generate sufficient bite force and clamping force to prevent the expansion device 20 from sliding or falling off on the substrate. At the same time, due to the locking or pressing effect of the spiral member 40, the expansion device 20 can be firmly fixed on the substrate to achieve the expected fixing effect.

[0196] In this example, see Fig. 9 The end of the groove 22 or the slat 23 or the expansion strip 21 connected to the sleeve 10 is L-shaped or partially inclined, and the local part is the end point where the groove 22 or the slat 23 is connected to the sleeve 10 and 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.

[0197] When the end of the groove 22, 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, it means that a right angle or a near right angle is formed between the two parts. This design can enhance the connection strength between the groove 22, the slat 23 or the expansion strip 21 and the sleeve 10 to prevent them from falling off or breaking during use. In specific implementation, the groove 22, the slat 23 or the expansion strip 21 can be firmly connected to the sleeve 10 by integral molding, welding, riveting, etc., and ensure that the L-shaped turning point between them has sufficient strength and stability.

[0198] When the local inclined setting is used, the end points where the groove bar 22, the lath 23 or the expansion bar 21 are connected to the sleeve 10 are inclined or inclined head-to-tail. This design can make the groove bar 22, the lath 23 or the expansion bar 21 more smoothly when expanding.

[0199] 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 strip 21, and the internal filler 30 is provided at one end of the expansion device 20 close to the sleeve 10 or / and in the sleeve 10.

[0200] The internal filler 30 is one or more of wood sticks, bamboo sticks, fibers, plastics, nylon, foam and the like.

[0201] The external filler 30 is fixed to the groove bar 22 or the plate bar 23 or the expansion bar 21 by a card type fixation or a glue type fixation.

[0202] The internal filler 30 is arranged at one end of the shrinking and expanding 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 shrinking and expanding device 20 can maintain a stable shape and size when it expands.

[0203] 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.

[0204] In a specific implementation, the internal filler 30 can be arranged inside the shrinking and expanding device 20 or the sleeve 10 by insertion, clamping, injection molding, bonding, etc.

[0205] The external filler 30 is arranged on the groove bar 22, the plate bar 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.

[0206] The external filler 30 can also be made of a variety of materials, such as one or more of metal materials, plastic materials, wood and bamboo materials, nylon materials, chemical hoses, carbonized wood and bamboo, fibers, etc. The selection of these materials depends on the type of substrate and the fixing requirements.

[0207] In specific implementation, the external filler 30 can be connected to the groove 22, the slat 23 or the expansion strip 21 by means of clip-on fixing or adhesive fixing. The clip-on fixing usually involves inserting the filler 30 into a pre-designed slot and fixing it by means of a buckle or a spring; while the adhesive fixing involves sticking the filler 30 on the groove 22, the slat 23 or the expansion strip 21 by applying an adhesive.

[0208] When the spiral member 40 enters or passes through the shrinking and expanding device 20, the shrinking and expanding device 20 will expand and form a close contact with the substrate. At this time, the internal filler 30 provides additional support and strength to ensure that the shrinking and expanding device 20 can maintain a stable shape and size and prevent deformation or damage due to external forces.

[0209] 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 \ and with low density are mainly used; if the substrate is a solid red brick wall, then , if the substrate is a porous red brick wall, then , if the substrate is an aerated brick wall, then high density materials are mainly used.

[0210] Before using the expansion device, it is necessary to first identify and determine the type of target matrix. The matrix types may include concrete walls, solid red brick walls, porous red brick walls, and aerated brick walls.

[0211] According to the type of substrate, select a suitable 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 wood-bamboo materials with lower density as the external filler 30. These materials can improve the gripping force and the expansion force at the same time. 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 positions of the holes in the porous brick walls, and can expand at the specified positions. 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 density of aerated bricks is low and 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 intended to be used, all the materials mentioned can be used with just fewer ingredients. Therefore, the embodiments are only illustrative and not limiting.

[0212] After selecting the appropriate material of the external filler 30, it needs to be installed on the groove 22, the slat 23 or the expansion strip 21. This can be done by clip-on fixing, glue fixing or other appropriate fixing methods. By selecting the appropriate material of the external filler 30 according to different substrate types, the expansion device can better adapt to different types of walls. This helps to ensure that the expansion device can form a squeeze contact with the substrate when expanding and improve sufficient grip.

[0213] It should be noted that in the expansion device described in the present invention, an expansion block and a nail striking pattern 48 are arranged in the shrinking and expanding device of the expansion device. Through the mutual coordination and the occlusal arrangement of the nail striking pattern 48, the nail striking 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, pentagon, wave shape, etc. The nail striking pattern is combined with the screw tooth or tooth groove of the corresponding screw-in spiral member. When the spiral member is screwed in or the nail is hammered in and its tooth tip and the nail striking pattern 48 are in an extruded state, the limited space of the shrinking and expanding device can be expanded to the maximum extent, thereby achieving a better safety anchoring effect, and it will be stronger when used with glue.

[0214] It should be noted that the spiral member mentioned in the present invention should not be understood as necessarily having a spiral function. It is only a code in the present invention for better distinction during writing. The part connected to the expansion device can be any one of bolts, screws, self-tapping screws, nails, and thorn nails (thorny nails) or any combination of two or more of them; when the spiral member is a nail or a thorn nail, it is entered by knocking, not spiraling, so it is specially explained.

[0215] It should be noted that the expansion device described in the present invention is preferably produced by die-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 die-type stamping production and automated assembly line operation. This can reduce production costs, and low costs make it easier to promote.

[0216] 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-specified settings that can be understood through text descriptions can also be well deduced.

[0217] It should also be noted that the ball joint 47 can be adjusted arbitrarily left and right or up and down or in a ball-and-shaft manner. Its main function is that if the corresponding anchor hole of an expansion device is tilted, the corresponding implanted expansion device will also tilt accordingly, and the screw part will also tilt accordingly. Therefore, the verticality must be adjusted through the ball joint. In particular, when a decorative panel corresponds to the screw parts set on four expansion devices, it is necessary to ensure that the inner thread pattern on the ball joint on the screw part is vertically aligned with the corresponding thread hole of the decorative panel so that they can be locked in parallel. At this time, multiple ball heads can be adjusted to facilitate the parallel locking of the decorative panel, which is particularly suitable for the installation and locking of billboards and plaques, and 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 combination 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. The screw through hole penetrates 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, the expansion device described above can be directly knocked into without setting a spiral point and can also be used in the technology of the present invention.

[0218] 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 replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate 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, include: The invention comprises a sleeve, characterized in that: The sleeve or / and the tail end of the sleeve is 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 the expansion bars are provided with multiple expansion bars, 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 slots for the expansion bars to expand and contract. The slots are slots or holes. The expansion bars are U-shaped, V-shaped, W-shaped or straight-line shaped. The expansion bars are provided with fillers. 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. 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 arranged at the rear end of the sleeve and extend; the sleeve and the grooves or / and slats are threadedly connected, integrally formed, card-connected or hinged; the grooves are V-shaped, U-shaped or W-shaped, and the slats are straight-lined; fillers are provided on the grooves or / and slats, 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; The sleeve wall is provided with through hole patterns, / or pressed threads, / or internal threads, / or screw patterns generated by internal clamping points, / or through hole patterns, / or pressed threads, / or internal threads, / or nail hammer patterns, / or puncture patterns, / or screw patterns generated by internal clamping points, / or screw patterns formed on the expansion device; the expansion device allows a 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.

2. An expansion device according to claim 1, It is characterized in that The screw pattern arranged on the sleeve wall is combined with one or more screw patterns arranged 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 arranged on the sleeve is a ring-shaped or a spiral-shaped or a dot-shaped screw pattern arranged on the sleeve or a screw pattern or an inner card point pattern arranged on the longitudinal periphery of the expansion bar; The sleeve is provided with a slot hole for the expansion and contraction of the expansion bar, the slot hole is a groove or a hole, any side or any point of the slot hole is fixedly connected or integrally connected to the expansion bar, the slot hole is connected with one or two or more expansion bars, and when the expansion bars are set to two, they are arranged relative to each other.

3. An expansion device according to claim 1, It is characterized in that The expansion device is used in combination with a spiral member, characterized in that 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, which is paired with the expansion device, is a bolt or a screw or a self-tapping screw or a barbed nail or a nail that enters the expansion device through screwing or knocking into the contraction and expansion device to expand the contraction and expansion device.

4. An expansion device according to claim 1, It is characterized in that The groove or\and the slat is provided with a baffle at one end away from the sleeve threaded connection, integral molding, card connection or hinged connection; or\and the expansion strip is provided with a baffle at one end away from the sleeve integral molding, card connection or hinged connection.

5. An expansion device according to claim 4, It is characterized in that 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 strip or expansion strip; the return pressure strip is used to fix the filler or\and as a filler to increase the expansion arc.

6. An expansion device according to claim 1, It is 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 lath are arranged in a barbed reverse hook style or a toothed style or a concave-convex style or a flat edge style or a wavy style. When the expansion bar or the groove or the lath are partially or completely arranged in a barbed reverse hook style, the expansion bar or the groove or the lath enter the anchor hole and start the barb effect. After the spiral member enters, the expansion bar or the groove or the lath will bite the corresponding anchor hole wall more tightly to increase the pulling force.

7. An expansion device according to claim 1, It is characterized in that When the expansion strips are multiple, they are single-layer or multi-layer; 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 triangle, pentagon or heptagon; 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; 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.

8. An expansion device according to claim 1, It is characterized in that The nail pattern, thorn pattern, fish scale pattern, pressed thread, tooth pattern, through hole pattern, or internal card point pattern arranged on the groove or the slat or the expansion strip are arranged on one side or on both sides. When the groove or the slat or the expansion strip is arranged on both sides, the thickness of the groove or the slat or the expansion strip is increased to increase the expansion degree during application; When the expansion strips are symmetrically arranged or mutually opposed or interlockingly arranged, the interlocking arrangement may be point-type interlocking or wave-type interlocking or any other combination of interlocking arrangements.

9. An expansion device according to claim 1, It is characterized in that The 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 knocked into the expansion device to expand the shrinking device. After the barb enters the shrinking device, it starts the reverse hook positioning function. The shrinking device is provided with one or more combinations of inner patterns, nail patterns, puncture patterns, embossing patterns, through-hole patterns, screw patterns, and inner card point patterns that are engaged or hooked with the barb; when multiple combinations are arranged in overlapping combinations, the overlapping combination is arranged to have nail patterns or\and puncture patterns or\and inner card point patterns on the inner patterns or embossing patterns or screw patterns; The nailing pattern is one or more of a dot shape, a straight line shape, a triangle, a pentagon, a wave shape, a plum blossom shape, etc., or can be set to any shape. 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.

10. An expansion device according to claim 1 or 9, It is characterized in that An inner clamping point setting opening is arranged on the sleeve wall or the shrinking and expanding device, the inner clamping point pattern is arranged on the sleeve or the shrinking and expanding device, the inner clamping point setting opening is arranged with one or more inner clamping point patterns, and the inner clamping point patterns are arranged around the inner clamping point setting opening or on any one side or more than one side; When the inner clamping point pattern is set downward, it is toward one side of the anchor hole, and the inner clamping point is set vertically, inclined, or bent inwardly; 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 generated notch array is used as a spiral point of the spiral opening; The inner clamping point setting opening is a quadrilateral, a slot or other arbitrary shapes.

11. An expansion device according to claim 1, It is characterized in that The expansion device is provided with one end of the expansion strip aligned with a pre-set anchor hole, and the expansion device is implanted into the anchor hole by knocking or screwing in; one 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 to expand the expansion device.

12. An expansion device according to claim 1, It is characterized in that The end of the groove or the slat or the scaling expansion bar connected to the sleeve is L-shaped with the end where the baffle is set, or the groove or the slat or the scaling expansion bar is partially inclined or head-to-tail inclined with the sleeve, the head end is the end where the groove or the slat is connected to the sleeve, and the tail end is the end where the baffle is set; when the groove or the slat or the scaling expansion bar is relatively set, their bottoms are set in abutment or bite-fitting manner.

13. An expansion device according to claim 1, It is characterized in that The filler includes: an internal filler and an external filler; the external filler is arranged on the groove bar or\and the plate bar or\and the expansion bar, and the internal filler is arranged at one 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, caulking agent, etc.; The external filler is fixed to the groove bar or the plate bar or the expansion bar by a clip type fixation or a glue type fixation or a nail type fixation.

14. An expansion device according to claim 1, It is characterized in that The material of the external filler is set according to different application substrates. 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.

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