Self-locking belt buckle and belt assembly

Abstract

The utility model relates to the field of belt, concretely relates to a self-locking belt buckle and belt assembly. The self-locking belt buckle in the scheme, including the buckle head frame, is equipped with the passageway for the belt along the vertical direction insertion in the buckle head frame inside, sets up the inclined plane in the passageway, and the inclined plane extends obliquely upwards along the direction of the belt leaving the buckle head frame, wedge, wedge is slidably arranged in the passageway, and cooperates with the inclined plane. When the belt inserts, manually operates wedge and moves to the contact with the belt along the inclined plane, and the belt draws and drives wedge to extrude the belt along the inclined plane, realizes the automatic locking with the inclined plane self-locking principle. This design makes it unnecessary to carry out the punching, the pressure tooth, the installation plastic rack etc. operation on the belt, avoids the damage to the belt, especially in the use process, and the belt does not have any indentation, keeps the integrity and the aesthetic degree of the belt, prolongs the service life of the belt.

Description

Technical Field

[0001] This utility model relates to the field of belts, specifically to a self-locking belt buckle and belt assembly. Background Technology

[0002] Existing belt buckles have many defects, such as:

[0003] 1. Pin buckle: It is easy to leave rough marks on the belt, and the hole is easy to be stretched.

[0004] 2. Plate buckles and smooth buckles: Long-term use will cause the holes on the belt to become enlarged;

[0005] 3. Automatic buckle: A plastic toothed rack needs to be embedded in the belt. It will make noise when pulled. The belt will be unusable after the plastic ages. In addition, the exposed wrench part affects the appearance and simplicity.

[0006] 4. Toothless automatic buckle: It will leave tooth marks on the back of the belt and expose the wrench part, which will affect the appearance;

[0007] 5. Roller belt buckle: It uses surface-to-line contact and cannot form a self-locking mechanism. It requires pressing teeth on the back of the belt or engraving teeth on the roller to increase friction, which will damage the belt. Moreover, a large force is required to tighten the belt, otherwise it is easy to loosen. Due to structural limitations, its handle is not convenient to design to be large enough, and the exposed handle is not simple enough.

[0008] In general, most belt buckles on the market require drilling holes, pressing teeth, or installing toothed racks on the belt, which makes the belt prone to fraying, and various indentations appear during use. The exposed handle of the belt buckle affects the appearance, and the shortcomings of the belt buckle affect the service life of the belt. Utility Model Content

[0009] In view of the above, the purpose of this utility model is to address the problems of the prior art by providing a self-locking belt buckle that does not require drilling holes in the belt, pressing teeth into the belt, or installing plastic toothed racks on the belt, and that leaves no marks on the belt during use, has a simple appearance, is easy to operate, and is durable.

[0010] The self-locking belt buckle in this solution includes:

[0011] The buckle frame has a channel inside for the belt to be inserted longitudinally, and an inclined surface is provided in the channel, which extends obliquely upward in the direction in which the belt leaves the buckle frame.

[0012] A wedge is slidably disposed within the channel and engages with an inclined surface.

[0013] After the belt is inserted, the wedge is manually moved along the inclined surface until it contacts the belt. When the belt is pulled, the wedge is driven to squeeze the belt along the inclined surface, and automatic locking is achieved by using the self-locking principle of the inclined surface.

[0014] Furthermore, the inclination angle of the inclined surface is 6°-8° with the direction of belt insertion, ensuring that the inclination angle of the inclined surface is less than or equal to the friction angle, so that self-locking can be achieved without auxiliary tools.

[0015] Furthermore, a rubber layer with a thickness of 0.5-2.5mm and a Shore hardness of 30A-70A is adhered to the contact surface of the wedge. The rubber layer is bonded with adhesive. Traditional rigid wedges require a large pushing force to unlock or tighten when in contact with the belt; this invention, by setting a rubber layer on the contact surface of the wedge, utilizes the elastic deformation characteristics of rubber. When a reverse pushing force is applied, the rubber layer and the belt contact surface undergo localized deformation, breaking the static friction balance and significantly reducing the unlocking force. Moreover, the rubber layer and the belt have flexible contact, avoiding belt indentations, and it is suitable for belts made of various materials such as top-grain cowhide and plastic.

[0016] Compared with the prior art, this application has the following advantages:

[0017] 1. Most existing belt buckles require drilling holes, pressing teeth, or installing toothed racks on the belt, which makes the belt prone to fraying and various indentations during use, affecting its appearance and service life. This invention eliminates the need for drilling holes, pressing teeth, and installing plastic toothed racks on the belt, thus avoiding damage, increasing processing steps, maintaining the belt's integrity and appearance, and extending its service life.

[0018] 2. Utilizing the principle of inclined plane self-locking, after the belt is inserted, the wedge is manually moved along the inclined plane until it contacts the belt. When the belt is pulled, it causes the wedge to squeeze the belt along the inclined plane, thus achieving automatic locking. The reasonable inclination angle ensures that the belt will not loosen during use.

[0019] 3. The buckle frame has a simple design with no exposed wrenches or other parts, which avoids affecting the overall aesthetics and is suitable for various occasions.

[0020] 4. The contact surface of the wedge is covered with a rubber layer, which reduces the unlocking force, making the operation easier. It also makes flexible contact with the belt, avoiding belt indentation. It is suitable for belts made of various materials such as top-grain cowhide and plastic. Attached Figure Description

[0021] Figure 1 A three-dimensional schematic diagram showing the relationship between the belt and the self-locking belt buckle;

[0022] Figure 2 A top view diagram showing the fit between the belt and the self-locking belt buckle;

[0023] Figure 3 This is a schematic diagram of the belt's self-locking state;

[0024] Figure 4A three-dimensional schematic diagram of a self-locking belt buckle;

[0025] Figure 5 This is a schematic diagram of the internal structure of a self-locking belt buckle.

[0026] Figure 6 , Figure 7 Assembly diagrams of a self-locking belt buckle from different perspectives;

[0027] Reference numerals: buckle frame 1, inclined surface 101, belt 2, wedge block 3, step 301, slot 302, rubber layer 4, limit buckle 5, countersunk screw 6. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0029] Reference Figures 1 to 7 The self-locking belt buckle shown includes a buckle frame 1, which is the main structure of the self-locking belt buckle. It can be manufactured using MIM metal injection molding, metal welding, or high-strength engineering plastic injection molding to ensure overall structural strength. An internal channel for inserting the belt 2 is formed. The width of the channel is adapted to the standard belt 2 size, such as 3.5cm or 4cm, and the inner walls on both sides are smooth to reduce frictional wear on the belt 2.

[0030] The lower sidewall of the channel forms an inclined surface 101, which has an angle of 6°-8° with the insertion direction of the belt 2. The surface of the inclined surface 101 is mirror polished or ground, with a roughness Ra≤1.6μm, to ensure smooth sliding of the wedge block 3.

[0031] The inclined surface 101 is welded with inverted L-shaped limit buckles 5 on both sides. The limit buckles 5 are used to cooperate with the step 301 and both sides of the wedge block 3 to prevent the wedge block 3 from detaching from the inclined surface 101 laterally or vertically.

[0032] A countersunk screw 6 is provided at the bottom of the buckle frame 1 as a limiting element. It passes through the channel from the outside and inserts into the wedge block 3. The wedge block 3 has a matching groove 302, the distance between the two ends of the groove 302 being the travel range of the wedge block 3. When the wedge block 3 slides along the inclined surface 101, the tip of the countersunk screw 6 moves relative to each other within the groove 302. When the tip touches either end of the groove 302, a mechanical stop is formed, limiting the maximum sliding stroke of the wedge block 3 and preventing the wedge block 3 from disengaging from the inclined surface 101. The countersunk screw 6, as a limiting element, ensures aesthetics, safety, and ease of installation.

[0033] The wedge 3 is a rectangular block structure, the length of which is adapted to the width of the channel, and the thickness is fitted with the upper and lower limit buckles 5 with a gap.

[0034] Detailed Usage Guide

[0035] Locking process: Insert belt 2 from the entrance of the channel and stop when it reaches the appropriate position. Manually push wedge 3 to slide until it contacts belt 2.

[0036] When belt 2 is subjected to outward tension, wedge 3 generates a compressive force perpendicular to belt 2 under the action of inclined surface 101, forming a self-locking mechanism.

[0037] Unlocking process: Gently push the belt 2 inward, and the wedge 3 will slide down the inclined surface 101 with the help of the elastic deformation of the rubber layer 4, releasing the pressure on the belt 2, and the belt 2 can be easily pulled out. Example

[0038] To further optimize the performance of the belt buckle, this embodiment is an improvement upon Embodiment 1. In this embodiment, a rubber layer 4 is glued to the contact surface of the wedge 3. The rubber layer 4 has a thickness of 0.5-2.5mm and a Shore hardness of 30A-70A to ensure moderate softness and hardness. Traditional rigid wedges exhibit significant static friction when in contact with the belt, requiring a large pushing force to unlock or tighten. This invention, by setting a rubber layer on the wedge contact surface, utilizes the elastic deformation characteristics of rubber. When a pushing force is applied, the rubber layer and the belt contact surface undergo localized deformation, disrupting the static friction balance and significantly reducing the unlocking or tightening force. Furthermore, the rubber layer and the belt have flexible contact, preventing permanent indentations on the belt, making it suitable for belts made of various materials such as top-grain leather and plastic. Example

[0039] This embodiment is an alternative to Embodiment 1.

[0040] In this embodiment, a flat surface can be milled out of the roller in the existing roller belt buckle, and then an oblique groove can be set on the buckle frame so that the surfaces are in contact and self-locking is formed.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-locking belt buckle, characterized in that, include: The buckle frame (1) has a channel inside for inserting the belt (2) longitudinally; The wedge (3) is slidably disposed in the channel. The channel is provided with an inclined surface (101) that cooperates with the wedge (3). The inclined surface (101) is obliquely upward along the direction in which the belt (2) leaves the buckle frame (1). When the belt (2) is inserted into the buckle frame (1), the wedge (3) is manually moved along the inclined surface (101) to contact the belt (2). Due to the friction, when the belt (2) is subjected to an outward pulling force, the wedge (3) will squeeze the belt (2) along the inclined surface (101) to achieve self-locking.

2. The self-locking belt buckle according to claim 1, characterized in that, The angle of the inclined plane (101) is 6°-8°.

3. A self-locking belt buckle according to claim 1 or 2, characterized in that, The wedge (3) has a contact surface that cooperates with the belt (2), and a rubber layer (4) is provided on the contact surface of the wedge (3).

4. A self-locking belt buckle according to claim 3, characterized in that, The thickness of the rubber layer (4) is 0.5-2.5 mm, and the Shore hardness is 30A-70A.

5. A self-locking belt buckle according to claim 1, characterized in that, The buckle frame (1) has inverted L-shaped limiting buckles (5) on both sides of the channel. The wedge (3) has steps (301) on both sides that cooperate with the limiting buckles (5). The steps (301) contact the limiting buckles (5), and the limiting buckles (5) restrict the lateral and vertical displacement of the wedge (3).

6. A self-locking belt buckle according to claim 1, characterized in that, The buckle frame (1) is provided with a limiting member. The limiting member passes through the channel and is inserted into the slot (302) provided on the wedge (3). The two ends of the slot (302) are used to limit the sliding stroke of the wedge (3).

7. A self-locking belt buckle according to claim 6, characterized in that, The limiting component is a countersunk screw (6).

8. A belt assembly, characterized in that, Includes a belt (2) and a self-locking belt buckle as described in claim 1.

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