Buckle structure for connecting square nut

Abstract

The utility model discloses a buckle structure for connecting a square nut, relates to the field of production of plastic parts, and aims to solve the obvious disadvantages that the complexity and the cost of a mold structure are increased due to the adoption of an insert injection molding process in a thread fixing structure in the prior art; meanwhile, the placement process of a plurality of inserts consumes a long time, the injection molding period is remarkably prolonged, and the injection molding quality is influenced; and in addition, the problem that the rejection rate of parts is increased due to the fact that the injection molding process is irreversible and errors are prone to occurring when various inserts are adopted is solved. A rectangular through groove is formed in the upper end of the middle of the buckle fixing piece, an elastic body is arranged in the rectangular through groove, rectangular limiting pieces are fixedly connected to the two sides of the middle of the front end face of the buckle fixing piece correspondingly, and rectangular limiting grooves are formed in the inner side end faces of the two rectangular limiting pieces correspondingly; a square nut is jointly connected between the two rectangular limiting pieces, and a plastic fixing piece is jointly arranged at the front ends of the two rectangular limiting pieces.

Description

Technical Field

[0001] This utility model relates to the field of plastic parts manufacturing, specifically a snap-fit ​​structure for connecting square nuts. Background Technology

[0002] Insert injection molding of plastic parts is an advanced manufacturing process. It involves pre-fixing inserts made of metal, glass, wood, or other materials in appropriate positions within an injection mold, then injecting plastic to form the part. During injection molding, the plastic fills the mold cavity and encapsulates the insert under high temperature and pressure. After cooling and solidification, the insert and plastic are tightly bonded together as a single unit. This process not only improves the strength and functionality of products but also enables the precision manufacturing of complex structures. Insert injection molding is widely used in home appliances, consumer electronics, toys, and other fields. Its advantages lie in the perfect combination of plasticity and rigidity according to design requirements, high reliability of the insert-main component composite, and automated mass production capability. However, insert injection molding also faces challenges such as complex mold structures, long injection cycles, and increased part scrap rates. Threaded fixing structures on plastic parts typically utilize insert injection molding, resulting in simple and reliable product structures that avoid secondary processes such as hot melting, welding, and riveting.

[0003] However, the use of insert injection molding for threaded fastening structures has the following disadvantages: 1. It increases the complexity and cost of the mold structure, especially when the position of the insert does not match the ejection direction, making mold implementation more difficult; 2. The placement of numerous inserts during the injection molding process is slow, significantly increasing the injection molding cycle and affecting injection quality; 3. The injection molding process is irreversible, and when there are many types of inserts, they are easily misplaced, resulting in an increased scrap rate of parts. Therefore, the market urgently needs to develop a snap-fit ​​structure for connecting square nuts to help people solve the existing problems. Utility Model Content

[0004] The purpose of this utility model is to provide a snap-fit ​​structure for connecting square nuts, in order to solve the problem mentioned in the background art that while the process of using insert injection molding for threaded fixing structures has its advantages, it also has obvious disadvantages: it increases the complexity and cost of the mold structure, especially when the position of the insert is inconsistent with the demolding direction, which increases the difficulty of mold design; at the same time, the placement process of numerous inserts takes a long time, which significantly prolongs the injection molding cycle and affects the injection quality; in addition, since the injection molding process is irreversible, errors are prone to occur when there are many types of inserts, leading to an increase in the scrap rate of parts.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a snap-fit ​​structure for connecting a square nut, comprising a snap-fit ​​fastener, a rectangular through groove provided at the upper middle part of the snap-fit ​​fastener, an elastic body provided inside the rectangular through groove, rectangular limiting members fixedly connected to both sides of the middle part of the front end face of the snap-fit ​​fastener, rectangular limiting grooves provided on the inner end faces of the two rectangular limiting members, a square nut connected between the two rectangular limiting members, and a plastic fastener provided at the front end of the two rectangular limiting members.

[0006] Preferably, the upper end of the elastic body is fixedly connected to the upper end face inside the rectangular through groove, the lower end of the front end face of the elastic body is fixedly connected to a triangular limiting part, and the middle part of the buckle fastener is provided with a through hole at the lower end of the rectangular through groove.

[0007] Preferably, the square nut is inserted into the rectangular limiting grooves of two rectangular limiting members on both sides, and limiting ribs are fixedly connected to the inner side end faces of the two rectangular limiting grooves, with the inner sides of the two limiting ribs respectively fitting against the two sides of the square nut.

[0008] Preferably, after the square nut is inserted between the two rectangular limiting members, the lower end face of the triangular limiting part is in contact with the upper end of the square nut.

[0009] Preferably, the square nut has a threaded hole in the middle, and the plastic fastener has a connecting hole in the middle.

[0010] Preferably, the square nut and the plastic fastener are connected and fixed by a locking screw that passes through the connecting hole and is then inserted into the threaded hole. The rear end of the locking screw extends out of the rear end of the square nut and passes through the through hole to extend out of the rear end face of the buckle fastener.

[0011] Preferably, a washer is provided between the locking screw and the plastic fastener.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] (1) In this utility model, the rectangular limiting part, the rectangular limiting groove and the limiting rib are cleverly designed to achieve a stable limiting of the square nut, without the need for a complex insert injection molding process, thereby greatly reducing the complexity of the mold structure and the production cost.

[0014] (2) In this utility model, the cooperation of the elastic body and the triangular limiting part realizes the rapid installation and limiting of the square nut, which simplifies the assembly process and improves production efficiency. At the same time, the structure is also reusable and easy to maintain and replace, reducing the cost of use.

[0015] (3) In this utility model, the snap-fit ​​structure for connecting square nuts is compact and reasonably designed. It is not only universal and can be widely applied to different products, but also reduces the scrap rate of parts and improves the overall quality and reliability of the product by reducing the use of insert injection molding process. Attached Figure Description

[0016] Figure 1 This is a front view of a snap-fit ​​structure for connecting square nuts according to the present invention;

[0017] Figure 2 This is a schematic diagram showing the disassembled parts of this utility model;

[0018] Figure 3 This is a front view of the buckle fastener of this utility model;

[0019] Figure 4 This is a side sectional view of the present invention.

[0020] In the diagram: 1. Buckle fastener; 101. Rectangular through groove; 102. Elastomer; 103. Triangular limiting part; 104. Through hole; 2. Rectangular limiting part; 201. Rectangular limiting groove; 202. Limiting rib; 3. Square nut; 301. Threaded hole; 4. Plastic fastener; 401. Connecting hole; 5. Locking screw; 501. Washer. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Please see Figure 1-4This utility model provides an embodiment of a snap-fit ​​structure for connecting square nuts, including a snap-fit ​​fastener 1. A rectangular through groove 101 is provided at the upper middle part of the snap-fit ​​fastener 1. An elastic body 102 is disposed inside the rectangular through groove 101. The upper end of the elastic body 102 is fixedly connected to the upper end face inside the rectangular through groove 101. A triangular limiting part 103 is fixedly connected to the lower end of the front end face of the elastic body 102. Rectangular limiting parts 2 are fixedly connected to both sides of the middle part of the front end face of the snap-fit ​​fastener 1. Rectangular limiting grooves 201 are provided on the inner end faces of both rectangular limiting parts 2. A square nut 3 is connected between the two rectangular limiting parts 2. A square nut 3 is inserted into each of the two rectangular limiting parts 2. The square nut 3 is inserted into the rectangular limiting grooves 201 of the two rectangular limiting members 2. Limiting ribs 202 are fixedly connected to the inner side end faces of the two rectangular limiting members 201. The inner sides of the two limiting ribs 202 are respectively attached to the two sides of the square nut 3. When the square nut 3 is placed, the square nut 3 is inserted between the two rectangular limiting members 2 from the front end of the buckle fixing member 1 and along the upper end of the two rectangular limiting members 2. When inserted, the two sides of the square nut 3 slide into the two rectangular limiting grooves 201 respectively. At the same time, the limiting ribs 202 inside the two rectangular limiting grooves 201 limit the two sides of the square nut 3 and make an interference fit with the two sides of the square nut 3, so that the square nut 3 remains stable and does not shake after being inserted.

[0023] Please see Figure 2-4 When the square nut 3 is inserted between the two rectangular limiting members 2, the lower end of the square nut 3 will first press down on the triangular limiting part 103, causing the triangular limiting part 103 to bend after being pressed, so that the triangular limiting part 103 retracts into the rectangular through groove 101. After the square nut 3 is inserted between the two rectangular limiting members 2, the lower end face of the triangular limiting part 103 is in contact with the upper end of the square nut 3. Through the rebound of the elastic body 102, the triangular limiting part 103 extends out of the rectangular through groove 101. At this time, the lower end face of the triangular limiting part 103 is in contact with the upper end face of the square nut 3, limiting the upper end of the square nut 3 and preventing the square nut 3 from sliding upward.

[0024] Please see Figure 1 , Figure 2 and Figure 4 Two rectangular limiting parts 2 are provided with plastic fixing parts 4 at their front ends. The middle of the snap-fit ​​fixing part 1 is provided with a through hole 104 at the lower end of the rectangular through groove 101. The middle of the square nut 3 is provided with a threaded hole 301. The middle of the plastic fixing part 4 is provided with a connecting hole 401. The square nut 3 and the plastic fixing part 4 are connected and fixed by a locking screw 5 passing through the connecting hole 401 and then inserted into the threaded hole 301. The rear end of the locking screw 5 extends out of the rear end of the square nut 3 and passes through the through hole 104 to extend out of the rear end face of the snap-fit ​​fixing part 1. The through hole 104 can accommodate the installation of locking screws 5 of different lengths. A washer 501 is provided between the locking screw 5 and the plastic fixing part 4.

[0025] Working Principle: In use, firstly, insert the square nut 3 downwards from the upper end of the snap-fit ​​fastener 1 between the two rectangular limiting pieces 2. The limiting ribs 202 within the rectangular limiting groove 201 provide a stable lateral limit for the square nut 3. Before insertion, the lower end of the square nut 3 compresses the triangular limiting part 103 on the elastic body 102, temporarily retracting the triangular limiting part 103 into the rectangular through groove 101. Once the square nut 3 is fully inserted, the elastic body 102, due to its rebound action, causes the lower end face of the triangular limiting part 103 to tightly adhere to the upper end of the square nut 3, effectively preventing the square nut 3 from moving upwards. Subsequently, align the plastic fastener 4 with the square nut 3, and use a locking screw 5 to thread it through the connecting hole 401 of the plastic fastener 4 and connect it to the threaded hole 301 of the square nut 3. The rear end of the locking screw 5 extends out through the through hole 104 and out through the rear end of the snap-fit ​​fastener 1. Simultaneously, the washer 501 increases the connection stability and sealing between the locking screw 5 and the plastic fastener 4. This structure not only simplifies the assembly process and improves production efficiency, but also reduces mold complexity and cost through ingenious design, reduces parts scrap rate, and ensures product reliability and durability.

[0026] 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.

Claims

1. A snap-fit ​​structure for connecting square nuts, comprising a snap-fit ​​fastener (1), characterized in that: The buckle fastener (1) has a rectangular through groove (101) at the upper middle part, and an elastic body (102) is provided inside the rectangular through groove (101). Rectangular limiting members (2) are fixedly connected to both sides of the middle part of the front end face of the buckle fastener (1). Rectangular limiting grooves (201) are provided on the inner end faces of the two rectangular limiting members (2). A square nut (3) is connected between the two rectangular limiting members (2). A plastic fastener (4) is provided at the front end of the two rectangular limiting members (2).

2. The snap-fit ​​structure for connecting square nuts according to claim 1, characterized in that: The upper end of the elastic body (102) is fixedly connected to the upper end face inside the rectangular through groove (101), and the lower end of the front end face of the elastic body (102) is fixedly connected to a triangular limiting part (103). The buckle fastener (1) has a through hole (104) in the middle and at the lower end of the rectangular through groove (101).

3. A snap-fit ​​structure for connecting square nuts according to claim 1, characterized in that: The square nut (3) is inserted into the rectangular limiting grooves (201) of two rectangular limiting members (2) on both sides. Limiting ribs (202) are fixedly connected to the inner side end faces of the two rectangular limiting grooves (201). The inner sides of the two limiting ribs (202) are respectively attached to the two sides of the square nut (3).

4. A snap-fit ​​structure for connecting square nuts according to claim 3, characterized in that: After the square nut (3) is inserted between the two rectangular limiting parts (2), the lower end face of the triangular limiting part (103) is in contact with the upper end of the square nut (3).

5. A snap-fit ​​structure for connecting square nuts according to claim 1, characterized in that: The square nut (3) has a threaded hole (301) in the middle, and the plastic fastener (4) has a connecting hole (401) in the middle.

6. A snap-fit ​​structure for connecting square nuts according to claim 4, characterized in that: The square nut (3) and the plastic fastener (4) are connected and fixed by a locking screw (5) through the connecting hole (401) and then inserted into the threaded hole (301). The rear end of the locking screw (5) extends out of the rear end of the square nut (3) and through the through hole (104) to extend out of the rear end face of the buckle fastener (1).

7. A snap-fit ​​structure for connecting square nuts according to claim 6, characterized in that: A washer (501) is provided between the locking screw (5) and the plastic fastener (4).

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