Self-locking belt buckle and belt assembly

Abstract

The invention relates to the field of belts, in particular to a self-locking belt buckle and a belt assembly. According to the scheme, the self-locking belt buckle comprises a buckle head frame, a channel allowing a belt to be inserted in the longitudinal direction is formed in the buckle head frame, an inclined face is arranged in the channel, and the inclined face extends upwards in the direction that the belt leaves the buckle head frame in an inclined mode; and the wedge block is arranged in the channel in a sliding manner and is matched with the inclined surface. After the belt is inserted, the wedge block is manually operated to move along the inclined plane to be in contact with the belt, the wedge block is driven to extrude the belt along the inclined plane when the belt is pulled, and automatic locking is realized by utilizing an inclined plane self-locking principle. By means of the design, operations such as punching, tooth pressing and plastic rack mounting do not need to be conducted on the belt, damage to the belt is avoided, particularly, the belt does not have any indentation in the using process, the integrity and attractiveness of the belt are kept, and the service life of the belt is prolonged.

Description

Technical Field

[0001] The present invention relates to the field of belts, and in particular to a self-locking belt buckle and a belt assembly. Background Art

[0002] Existing belt buckles have many defects, such as: 1. Pin buckle: It is easy to leave rough marks on the belt and the hole is easy to be enlarged; 2. Plate buckle and smooth buckle: Long-term use will cause the holes on the belt to be enlarged; 3. Automatic buckle: A plastic rack needs to be embedded in the belt, which will make a sound when pulled. The belt will be scrapped after the plastic ages, and the exposed wrench part affects the appearance and simplicity; 4. Toothless automatic buckle: It will leave tooth marks on the back of the belt, exposing the wrench part, affecting the appearance; 5. Roller belt buckle: It uses surface and line contact and cannot form self-locking. It is necessary to press teeth on the back of the belt or engrave teeth on the roller to increase friction, which will damage the belt. In addition, it takes a lot of force to tighten the belt, otherwise it will easily loosen. Due to structural limitations, the handle is inconveniently designed to be large, and the grip is not strong enough. At the same time, the exposed handle is not simple enough.

[0003] In general, most belt buckles on the market require drilling holes, pressing teeth or installing racks on the belts, which causes the belts to become fuzzy easily and various indentations to appear during use. The handles on the exposed parts of the belt buckles affect the appearance and the shortcomings of the belt buckles affect the service life of the belts. Summary of the Invention

[0004] In view of the above, the purpose of the present invention is to address the problems of the prior art and provide a self-locking belt buckle that does not require drilling holes on the belt, pressing teeth on the belt, or installing plastic racks on the belt, and has no indentations on the belt during use, a simple appearance, labor-saving operation, and durability.

[0005] The self-locking belt buckle in this solution includes: 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 along the direction in which the belt leaves the buckle frame; A wedge is slidably disposed in the channel and cooperates with the inclined surface.

[0006] After the belt is inserted, the manually operated wedge moves 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 using the inclined surface self-locking principle.

[0007] Furthermore, the inclination angle of the inclined surface is 6°-8° with respect to the belt insertion direction, ensuring that the inclination angle of the inclined surface is less than or equal to the friction angle, and self-locking can be achieved without auxiliary tools.

[0008] 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 adhered by glue. When a traditional rigid wedge contacts a belt, a large thrust is required to unlock or tighten it. The present invention provides a rubber layer on the contact surface of the wedge, and utilizes the elastic deformation characteristics of rubber. When a reverse thrust is applied, the rubber layer and the belt contact surface undergo local deformation, breaking the static friction balance and significantly reducing the unlocking force. Moreover, the rubber layer and the belt are in flexible contact, avoiding belt indentations, and is suitable for belts made of various materials such as top-grain cowhide and plastic.

[0009] Compared with the existing technology, this application has the following beneficial effects: 1. Most existing belt buckles require drilling, pressing teeth, or installing racks on the belt, which can easily cause the belt to become frizzy and leave various indentations during use, affecting its appearance and service life. However, this invention eliminates the need for drilling, pressing teeth, or installing plastic racks on the belt, thus avoiding damage to the belt and adding additional processing steps, maintaining the integrity and aesthetics of the belt and extending its service life.

[0010] 2. Utilizing the principle of inclined plane self-locking, after the belt is inserted, the manually operated wedge moves along the inclined plane until it contacts the belt. When the belt is pulled, the wedge is driven to squeeze the belt along the inclined plane to achieve automatic locking. The reasonable inclination angle ensures that the belt will not loosen during use.

[0011] 3. The design of the buckle frame is simple, without exposed parts such as wrenches, which avoids affecting the overall appearance and is suitable for a variety of occasions.

[0012] 4. A rubber layer is pasted on the contact surface of the wedge, which can reduce the unlocking force and make the operation easier. It also has flexible contact with the belt to avoid belt indentation. It is suitable for belts made of various materials such as top-grain cowhide and plastic. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A three-dimensional schematic diagram of the matching relationship between a belt and a self-locking belt buckle; Figure 2 Schematic diagram of the top view of the matching relationship between the belt and the self-locking belt buckle; Figure 3 This is a schematic diagram of the belt self-locking state; Figure 4 It is a three-dimensional schematic diagram of a self-locking belt buckle; Figure 5 This is a schematic diagram of the internal structure of a self-locking belt buckle; Figure 6 、 Figure 7 Assembly drawings of self-locking belt buckles from different perspectives; Reference numerals: buckle frame 1, inclined surface 101, belt 2, wedge 3, step 301, slot 302, rubber layer 4, limit buckle 5, countersunk screw 6. DETAILED DESCRIPTION

[0014] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example

[0015] Reference Figures 1 to 7 The self-locking belt buckle shown in the figure includes a buckle frame 1, which is the main structure of the self-locking belt buckle. It can be molded using MIM metal injection molding, metal welding, or high-strength engineering plastic injection molding to ensure overall structural strength. The buckle frame 1 has a through channel formed inside for inserting the belt 2. The width of the channel is adapted to standard belt 2 sizes, such as 3.5 cm and 4 cm, and the inner walls on both sides are smooth to reduce friction loss of the belt 2.

[0016] The lower side wall 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, ensuring smooth sliding of the wedge block 3.

[0017] Inverted L-shaped limit buckles 5 are welded on both sides of the inclined surface 101. 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 escaping from the inclined surface 101 horizontally or vertically.

[0018] A countersunk screw 6 serves as a stopper at the bottom of the buckle frame 1. It penetrates the channel from the outside and inserts into the wedge 3. The wedge 3 is provided with a matching slot 302, the distance between the two ends of which defines the travel range of the wedge 3. As the wedge 3 slides along the inclined surface 101, the tip of the countersunk screw 6 moves relative to the slot 302. When the tip contacts either end of the slot 302, a mechanical stop is formed, limiting the maximum sliding travel of the wedge 3 and preventing it from separating from the inclined surface 101. The countersunk screw 6, acting as a stopper, ensures aesthetics, safety, and ease of installation.

[0019] The wedge block 3 is a rectangular block structure, the length of which is adapted to the width of the channel, and the thickness of which is loosely matched with the upper and lower limit buckles 5 .

[0020] Detailed usage process Locking process: Insert the belt 2 from the entrance end of the channel, stop when it reaches the appropriate position, and manually push the wedge 3 to slide until it contacts the belt 2.

[0021] When the belt 2 is subjected to an outward pulling force, the wedge block 3 generates an extrusion force perpendicular to the belt 2 under the action of the inclined surface 101, thereby forming a self-locking state.

[0022] Unlocking process: gently push the belt 2 inward, and the wedge 3 slides down along the inclined surface 101 with the assistance 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

[0023] In order to further optimize the performance of the belt buckle, this embodiment is an improvement on the basis of embodiment 1. In this embodiment, a rubber layer 4 is glued to the contact surface of the wedge block 3 by glue. The thickness of the rubber layer 4 is 0.5-2.5mm and the Shore hardness is 30A-70A, so as to ensure that the hardness and softness are moderate. When a traditional rigid wedge block contacts the belt, the static friction force is large, and a large thrust is required to unlock or tighten. The present invention arranges a rubber layer on the contact surface of the wedge block and utilizes the elastic deformation characteristics of the rubber. When a thrust is applied, the rubber layer and the contact surface of the belt are locally deformed, breaking the balance of static friction and significantly reducing the unlocking or tightening force. Moreover, the rubber layer is in flexible contact with the belt to avoid permanent indentations on the belt. It is suitable for belts made of various materials such as top-grain cowhide and plastic. Example

[0024] This embodiment is an alternative to embodiment 1.

[0025] In this embodiment, a plane can be milled out of the roller in the existing roller belt buckle, and then an oblique sliding groove can be set on the buckle head frame, so that the surfaces are in contact with each other and self-locking is formed.

[0026] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A self-locking belt buckle, characterized in that: include: A buckle frame (1) is provided with a channel inside thereof for inserting the belt (2) in the longitudinal direction; The wedge block (3) is slidably arranged in the channel, and an inclined surface (101) cooperating with the wedge block (3) is provided in the channel. The inclined surface (101) is arranged obliquely upward along the direction in which the belt (2) leaves the buckle frame (1). After the belt (2) is inserted into the buckle frame (1), the wedge block (3) is manually operated to move along the inclined surface (101) until it contacts the belt (2). Due to the action of friction, when the belt (2) is subjected to an outward pulling force, the wedge block (3) is driven to squeeze the belt (2) along the inclined surface (101) to achieve self-locking.

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

3. A self-locking belt buckle according to claim 1 or 2, characterized in that: The wedge block (3) is provided with a contact surface that cooperates with the belt (2), and a rubber layer (4) is provided on the contact surface of the wedge block (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. The self-locking belt buckle according to claim 1, characterized in that: Inverted L-shaped limit buckles (5) are provided on both sides of the channel of the buckle frame (1), and steps (301) that cooperate with the limit buckles (5) are provided on both sides of the wedge block (3). The steps (301) are in contact with the limit buckles (5), and the limit buckles (5) limit the horizontal and vertical displacement of the wedge block (3).

6. The self-locking belt buckle according to claim 1, characterized in that: The outer wall of the buckle frame (1) is provided with a limiting piece, which penetrates the channel and is inserted into a slot (302) provided on the wedge block (3). The length direction of the slot (302) is parallel to the sliding direction of the wedge block (3), and the two ends of the slot (302) are used to limit the sliding stroke of the wedge block (3).

7. The self-locking belt buckle according to claim 1, characterized in that: The limiting member is a countersunk screw (6) A belt assembly, characterized in that: It comprises a belt (2) and a self-locking belt buckle as claimed in claim 1.

Images