Expandable pagoda-shaped metal fasteners

Abstract

This utility model discloses an expandable pagoda-shaped metal fastener, including a base, an annular head ring, multiple connecting arms, and threads. The base has a through hole, and the head ring is disposed opposite to the base. Each connecting arm connects to the base and the head ring at both ends, respectively. A gap is formed between adjacent connecting arms, and a channel for a screw to pass through is formed between the connecting arms, the base, and the head ring. The threads are provided on the outer surface of the connecting arms, and the threads have breaks at the gaps between the connecting arms. The head ring is sized such that when the screw tip passes through the head ring, it is compressed and breaks. This utility model's metal fastener combines threaded fixing and expansion fixing methods, enabling more stable fixing within the hole and higher stability.

Description

Technical Field

[0001] This utility model belongs to the field of hardware accessories technology, specifically relating to an expandable pagoda-shaped metal fastener. Background Technology

[0002] Pagoda-type fasteners are special threaded connectors used to fix pipe supports or other equipment to walls, floors, or columns. No pre-drilling is required; the fastener can be drilled directly into the substrate using a screwdriver or hand drill, and then the screw is tightened. Fasteners are generally divided into plastic and metal types. Traditional metal fasteners feature a seamless, wraparound design and, when used with screws, function only as ordinary fasteners, relying on the threaded engagement of the expansion tube with the substrate for fixation.

[0003] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0004] The purpose of this invention is to provide an improved fastener for enhancing the fixing effect on a substrate.

[0005] To achieve the above objectives, a specific embodiment of this utility model provides an expandable pagoda-type metal fastener, including a base, an annular head ring, multiple connecting arms, and threads. The base has a through hole, the head ring is disposed opposite to the base, and both ends of each connecting arm are respectively connected to the base and the head ring. A gap is formed between adjacent connecting arms, and a channel for screws to pass through is formed between the connecting arms, the base, and the head ring. The threads are disposed on the outer surface of the connecting arms, and the threads have breaks at the gaps between the connecting arms. The head ring is sized such that when the tip of a screw passes through the head ring, it is squeezed and breaks.

[0006] In one or more embodiments of the present invention, a reinforcing rib is provided on the surface of the connecting arm facing the channel. The reinforcing rib extends along the length of the connecting arm to the inner circle of the head ring. The reinforcing rib is configured to be threaded when the screw moves in the channel toward the head ring.

[0007] In one or more embodiments of this utility model, the width of the reinforcing rib gradually decreases in the direction toward the inside of the channel.

[0008] In one or more embodiments of this utility model, the reinforcing rib includes a contact surface that contacts the screw on the side away from the connecting arm.

[0009] In one or more embodiments of this utility model, four connecting arms are connected between the base and the head ring, and adjacent connecting arms are equidistant from each other.

[0010] In one or more embodiments of the present invention, a drill bit is provided on the side of the headband opposite to the base, and the drill bit includes a foot fixed to two opposing connecting arms.

[0011] In one or more embodiments of this utility model, four connecting arms are connected between the base and the head ring. A drill bit is fixed on the side of the head ring away from the base. The drill bit includes a support foot fixed to two opposite connecting arms. The thread forms the break at the gap between the connecting arm with the connecting support foot and the adjacent connecting arm in the clockwise direction.

[0012] In one or more embodiments of this invention, the inner diameter of the channel gradually decreases in the direction toward the headband.

[0013] In one or more embodiments of this utility model, the width of the connecting arm gradually decreases in the direction toward the headband.

[0014] Compared with the prior art, the metal fastener of this utility model combines two fixing methods, thread fixing and expansion fixing, which can be fixed more stably in the hole and has higher stability. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of a metal fastener in one embodiment of the present invention;

[0017] Figure 2 This is a top view of a metal fastener in one embodiment of the present invention;

[0018] Figure 3 This is a bottom view of a metal fastener in one embodiment of the present invention.

[0019] Explanation of key figure labels:

[0020] 100-Fastener, 10-Base, 20-Head ring, 30-Connecting arm, 31-Gap, 32-Reinforcing rib, 321-Contact surface, 40-Channel, 50-Drill bit, 51-Support leg, 60-Thread, 61-Break. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0022] like Figure 1-3 As shown, in one embodiment of this utility model, a pagoda-shaped fastener 100 made of metal (with higher strength and wider application range, such as zinc alloy) includes a base 10, a head ring 20, multiple connecting arms 30, and a thread 60. The base 10 has an opening, and the head ring 20 has a ring-shaped structure. The two are arranged opposite each other and connected by the connecting arms 30. A gap 31 is formed between adjacent connecting arms 30, and a channel 40 for screws to pass through is formed between the connecting arms 30 and the base 10 and head ring 20 at both ends. The thread 60 is provided on the outer surface of the connecting arm 30 (the side opposite to the channel 40), and a break 61 is provided on the thread 60.

[0023] The fastener 100 in this embodiment is a self-drilling component. It requires no pre-drilling and can be directly drilled into the substrate using a screwdriver or hand drill. Finally, the screw is screwed into the fastener 100. Its head ring 20 is relatively thin (e.g., its thickness and width can be set within 0.5 mm), making it more prone to breakage. After the fastener 100 is drilled into the substrate, when the screw (not shown) is inserted into the channel 40, because the diameter of the screw tip is larger than the inner diameter of the head ring 20, the screw tip compresses the head ring 20 as it passes through, causing it to break at the fracture point 61. Subsequently, the connecting arm 30 at the fracture point is compressed outwards against the hole wall, thus achieving an expansion effect. This configuration adds an additional fixing structure (expansion, the broken part of the head ring 20 being compressed against the hole wall) to the head of the fastener 100. Therefore, compared to relying solely on threaded fixing, the metal fastener 100 in this embodiment has a better fixing effect and is more difficult to detach from the hole after the screw is inserted.

[0024] Preferably, a reinforcing rib 32 is provided on the surface of the connecting arm 30 facing the channel 40, and the reinforcing rib 32 extends along the length of the connecting arm 30 to the inner circle of the head ring 20. After the screw is inserted into the channel 40, it contacts the reinforcing rib 32 and threads are tapped on the surface of the reinforcing rib 32, thereby fixing the screw to the fastener 100 without it falling off.

[0025] Furthermore, the width of the reinforcing rib 32 gradually decreases in the direction toward the inside of the channel 40, making its contact area with the screw smaller and making it easier for the screw to tap on the reinforcing rib 32.

[0026] In one embodiment, to prevent the screw from stripping when tapping the reinforcing rib 32, the cross-sectional shape of the reinforcing rib 32 is set to trapezoidal (not triangular), that is, a contact surface 321 is provided at the end away from the connecting arm 30, so as to ensure the contact area between the screw and the reinforcing rib 32 and ensure that the screw can tap normally on the reinforcing rib 32.

[0027] exist Figure 1 In the illustrated embodiment, four connecting arms 30 are connected between the base 10 and the head ring 20, with adjacent connecting arms 30 equidistant from each other. Furthermore, a drill bit 50 is provided on the head ring 20, enabling the fastener 100 to self-drill, allowing it to drill into certain substrates without the need for an electric drill. The drill bit 50 is located on the side of the head ring 20 opposite to the base 10 and includes two legs 51 fixed to two opposing connecting arms 30. With the legs 51 connected and fixed, the two connecting arms 30 cannot detach from the drill bit 50; therefore, only the two unconnected connecting arms 30 can be pressed outwards against the hole wall. This arrangement of connecting the drill bit 50 to the two connecting arms 30 increases the strength of the front end of the fastener 100, preventing insufficient strength during self-drilling that could cause the front end to twist and deform, preventing further drilling.

[0028] exist Figure 1 In the embodiment shown (4 connecting arms 30), the break 61 is formed at the gap 31 between the connecting arm 30 of the connecting leg 51 and the adjacent connecting arm 30 in the clockwise direction. This arrangement allows the connecting arm 30 to deform and compress the hole wall along the same gap 31 after the head ring 20 breaks.

[0029] In one embodiment, the inner diameter of the channel 40 gradually narrows in the direction toward the head ring 20, so that the front end of the fastener 100 can be properly opened after the screw is screwed in, and the entire fastener 100 is thinner at the front and thicker at the back, reducing the resistance at the beginning of drilling and making it easier for the entire fastener 100 to be correctly drilled into the substrate.

[0030] Secondly, the width of the connecting arm 30 gradually decreases along the direction toward the head ring 20. Alternatively, the connecting arm 30 can also adopt a standard rectangular structure, that is, the widths at both ends are the same. This embodiment does not limit this.

[0031] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0032] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An expandable pyramid metal fastener, characterized by, include: The base has a through hole; A ring-shaped head ring is disposed opposite to the base; Multiple connecting arms, each connecting arm is connected to the base and the head ring at both ends respectively, and a gap is formed between adjacent connecting arms, and a channel is formed between the connecting arms, the base and the head ring for screws to pass through; A thread is provided on the outer surface of the connecting arm, and the thread has a break at the gap of the connecting arm; The headband is sized such that when the screw tip passes through it, it is squeezed and breaks.

2. The fastener of claim 1, wherein, The connecting arm has a reinforcing rib on the side facing the channel. The reinforcing rib extends along the length of the connecting arm to the inner circle of the head ring. The reinforcing rib is configured to be threaded when the screw moves toward the head ring in the channel.

3. The fastener of claim 2, wherein, The width of the reinforcing rib gradually decreases in the direction toward the inside of the channel.

4. The fastener of claim 3, wherein, The reinforcing rib includes a contact surface that contacts the screw on the side away from the connecting arm.

5. The fastener of claim 1, wherein, The base and the head ring are connected by four connecting arms, and adjacent connecting arms are equidistant from each other.

6. The fastener of claim 5, wherein, A drill bit is provided on the side of the headband opposite to the base, and the drill bit includes a foot fixed to the two opposite connecting arms.

7. The fastener according to claim 6, characterized in that, The thread forms the break at the gap between the connecting arm of the connecting leg and the adjacent connecting arm in the clockwise direction.

8. The fastener according to claim 1, characterized in that, The inner diameter of the channel gradually decreases in the direction toward the head ring.

9. The fastener according to claim 1, characterized in that, The width of the connecting arm gradually decreases in the direction toward the headband.

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