Self-locking belt buckle

Abstract

The invention belongs to the technical field of belt buckles, and relates to a self-locking belt buckle which comprises a buckle body, a locking arm and a buckle ring, a hook-shaped arm is arranged at the upper end of the buckle body, the tail end of the locking arm is rotatably connected with the buckle body, the front end of the locking arm is clamped at the front end of the hook-shaped arm, a through hole is formed in the hook-shaped arm, and an unlocking button is movably clamped in the through hole. A button part and a pushing part are arranged on the unlocking button, a sliding way face is arranged on the pushing part, a protrusion is arranged on the inner side face of the hook-shaped arm, a self-locking torsional spring is arranged on the lock arm, the tail end of the self-locking torsional spring is arranged on the lock arm, and the front end of the self-locking torsional spring abuts against a stop position at the bottom of the protrusion to stop the lock arm from rotating. Under the action of pressing force, the upper part of the button part enables the upper part of the slideway surface to protrude out of the through hole and lifts the front end of the self-locking torsion spring from the bottom of the bulge to be separated from the stop position. The self-locking and unlocking mechanism is arranged on the buckle body, the locking arm has a self-locking function, and when the belt buckle is unlocked, the unlocking button and the locking arm are pressed at the same time, so that the safety is high.

Description

Technical Field

[0001] The invention belongs to the technical field of buckles, and in particular relates to a self-locking buckle. Background Art

[0002] The existing buckle with a spring-reset locking arm has no self-locking function and has poor safety. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a self-locking buckle, the locking arm of which has a self-locking function and is highly safe.

[0004] The present invention is implemented in this way. A self-locking buckle is provided, including a buckle body, a locking arm and a buckle ring. The buckle ring is arranged at the lower end of the buckle body, a hook-shaped arm is arranged at the upper end of the buckle body, a rope passing opening is arranged between the front end of the hook-shaped arm and the buckle body, the end of the locking arm is rotatably connected to the buckle body, the front end of the locking arm is clamped at the front end of the hook-shaped arm, a through hole is arranged on the hook-shaped arm, an unlocking button is movably clamped in the through hole, a button part and a push part are respectively arranged on the unlocking button, and the button part and the push part are respectively located on the left and right sides of the unlocking button. A slide surface is provided on the pushing portion, a protrusion is provided on the inner side surface of the hook-shaped arm, a self-locking torsion spring is provided on the locking arm, and the end of the self-locking torsion spring is provided on the locking arm. The front end of the self-locking torsion spring abuts against the bottom of the protrusion to prevent the locking arm from rotating, and the upper part of the slide surface is pushed into the through hole of the hook-shaped arm. Under the action of the pressing force, the upper part of the button portion causes the upper part of the slide surface to protrude from the through hole and lift the front end of the self-locking torsion spring from the bottom of the protrusion, and the front end of the self-locking torsion spring moves from the slide surface over the protrusion along the inner wall of the hook-shaped arm.

[0005] Furthermore, an elastic portion and a snap-fit ​​portion are respectively provided on the unlocking button, the elastic portion is provided at the upper portion of the unlocking button, the snap-fit ​​portion is provided at the bottom of the unlocking button, the end of the elastic portion is connected to the pushing portion, the front end of the elastic portion extends toward the upper side of the unlocking button and is squeezed into the through hole, and the snap-fit ​​portion is snapped at the left and right ends of the through hole.

[0006] Furthermore, an arc-shaped inclined surface is provided on the upper part of the protrusion, and the front end of the self-locking torsion spring moves up and down along the arc-shaped inclined surface.

[0007] Furthermore, an arc segment is arranged at the top end of the protrusion.

[0008] Furthermore, a straight section is provided at the front end of the self-locking torsion spring, and the straight section abuts against the bottom of the protrusion to prevent the locking arm from rotating.

[0009] Furthermore, a first rotating shaft is also provided on the buckle body, and the end of the locking arm is rotatably connected to the buckle body via the first rotating shaft.

[0010] Furthermore, a T-shaped groove and a limiting portion are respectively arranged at the ends of the locking arm, and a T-shaped portion is arranged at the front end of the hook-shaped arm. The T-shaped portion is located in the T-shaped groove and is blocked by the limiting portion.

[0011] Compared with the prior art, the self-locking buckle of the present invention comprises a buckle body, a locking arm and a buckle ring, a hook-shaped arm is arranged at the upper end of the buckle body, the end of the locking arm is rotatably connected with the buckle body, the front end of the locking arm is clamped at the front end of the hook-shaped arm, a through hole is arranged on the hook-shaped arm, an unlocking button is movably clamped in the through hole, a button part and a push part are arranged on the unlocking button, respectively, the button part and the push part are respectively located on the left and right sides of the unlocking button, a slide surface is arranged on the push part, a protrusion is arranged on the inner side surface of the hook-shaped arm, a self-locking torsion spring is arranged on the locking arm, the end of the self-locking torsion spring is arranged on the locking arm, the front end of the self-locking torsion spring abuts against the stop position at the bottom of the protrusion to prevent the locking arm from rotating, and pushes the upper part of the slide surface into the through hole of the hook-shaped arm, and the buckle is in the self-locking position. Under the action of the pressing force, the upper part of the button part makes the upper part of the slide surface protrude from the through hole and lifts the front end of the self-locking torsion spring from the bottom of the protrusion to make it out of the stop position, and the buckle is in the unlocking state. The front end of the self-locking torsion spring moves from the slide surface over the protrusion along the inner wall of the hook-shaped arm, and the buckle is in an open state. The present invention provides a self-locking and unlocking mechanism on the buckle body, so that the locking arm has a self-locking function. When the buckle is unlocked and opened, the unlocking button and the locking arm are pressed at the same time, which is simple, practical and highly safe. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional schematic diagram of the self-locking buckle of the present invention in a self-locking closed state; Figure 2 for Figure 1 A three-dimensional schematic diagram of a self-locking buckle in an open state; Figure 3 for Figure 1 A three-dimensional schematic diagram of a self-locking buckle in an unlocked state; Figure 4 for Figure 1 A cross-sectional view of Figure 5 for Figure 2 A cross-sectional view of Figure 6 It is a three-dimensional schematic diagram of the unlocking button of the self-locking buckle of the present invention.

[0013] The symbols in the figure are: 1. buckle body; 2. locking arm; 21. T-shaped slot; 22. limiting part; 3. buckle ring; 4. hook arm; 41. through hole; 42. protrusion; 43. arc-shaped inclined surface; 44. arc segment; 45. T-shaped part; 5. unlocking button; 51. button part; 52. elastic part; 53. engaging part; 54. pushing part; 55. slide surface; 6. self-locking torsion spring; 61. straight line segment; 7. first rotating shaft; A. rope passing port; B. rope receiving hole. DETAILED DESCRIPTION

[0014] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0015] Please also refer to Figures 1 to 5 As shown, a preferred embodiment of the self-locking buckle of the present invention includes a buckle body 1, a locking arm 2 and a buckle ring 3. The buckle ring 3 is arranged at the lower end of the buckle body 1, and a hook-shaped arm 4 is arranged at the upper end of the buckle body 1. The hook-shaped arm 4 is integrally connected with the buckle body 1. A rope opening A is arranged between the front end of the hook-shaped arm 4 and the buckle body 1, and when the rope opening A is in an open state, the rope connected to the hook-shaped arm 4 passes through the rope opening A. The end of the locking arm 2 is rotatably connected to the buckle body 1, and the front end of the locking arm 2 is clamped at the front end of the hook-shaped arm 4. Under the action of external force, the locking arm 2 rotates toward the inside of the hook-shaped arm 4. A through hole 41 is arranged on the hook-shaped arm 4, and an unlocking button 5 is movably clamped in the through hole 41.

[0016] Please also refer to Figure 4 and Figure 6 As shown, a button portion 51, an elastic portion 52, a clamping portion 53 and a push portion 54 are respectively provided on the unlocking button 5. The button portion 51 and the push portion 54 are respectively located on the left and right sides of the unlocking button 5, the button portion 51 is located on the outside of the hook-shaped arm 4, and the push portion 54 is located on the inside of the hook-shaped arm 4. The elastic portion 52 is provided on the upper part of the unlocking button 5, and the clamping portion 53 is provided on the bottom of the unlocking button 5. The end of the elastic portion 52 is connected to the push portion 54, and the front end thereof extends toward the upper side of the unlocking button 5, and abuts against the inner wall of the through hole 41, and is squeezed into the through hole 41. The clamping portion 53 is clamped at the left and right ends of the through hole 41, and a slideway surface 55 is provided on the push portion 54.

[0017] Please refer to Figures 1 to 5 As shown, a protrusion 42 is provided on the inner side of the hook-shaped arm 4. A self-locking torsion spring 6 is provided on the locking arm 2, and the end of the self-locking torsion spring 6 is provided on the locking arm 2. The front end of the self-locking torsion spring 2 abuts against the stop position at the bottom of the protrusion 42 to prevent the locking arm 2 from rotating, and pushes the upper part of the slide surface 55 into the through hole 41 of the hook-shaped arm 4, and the buckle is in the self-locking position. Under the action of the pressing force, the upper part of the button part 51 rotates along the engaging part 53, so that the upper part of the slide surface 55 protrudes from the through hole 41 and lifts the front end of the self-locking torsion spring 6 from the bottom of the protrusion 42 to make it out of the stop position, and the buckle is in the unlocked state. Under the action of external force, the locking arm 2 rotates toward the inner side of the hook-shaped arm 4, driving the front end of the self-locking torsion spring 6 to move from the slide surface 55 over the protrusion 42 along the inner wall of the hook-shaped arm 4, and the rope opening A is opened, and the buckle is in the open state.

[0018] An arcuate inclined surface 43 is provided on the upper part of the protrusion 42, and the front end of the self-locking torsion spring 6 moves up and down along the arcuate inclined surface 43. An arc segment 44 is provided at the top of the protrusion 42. The arcuate inclined surface 43 and the arc segment 44 are respectively provided to facilitate the resetting of the locking arm 2. During the resetting process of the locking arm 2, the straight segment 61 of the self-locking torsion spring 6 slides from top to bottom along the arcuate inclined surface 43 of the hook-shaped arm 4. The arcuate inclined surface 43 and the arc segment 44 can both reduce the obstruction of the protrusion 42 to the self-locking torsion spring 6, and facilitate the straight segment 61 of the self-locking torsion spring 6 to be reset to the bottom of the protrusion 42.

[0019] A straight section 61 is provided at the front end of the self-locking torsion spring 6 , and the straight section 61 abuts against the bottom of the protrusion 42 to prevent the locking arm 2 from rotating.

[0020] A first rotating shaft 7 is also provided on the buckle body 1, and the end of the locking arm 2 is rotatably connected to the buckle body 1 via the first rotating shaft 7. The provision of the first rotating shaft 7 improves the flexibility of the locking arm 2 in rotation.

[0021] A T-shaped slot 21 and a limiting portion 22 are respectively provided at the end of the locking arm 2, and a T-shaped portion 45 is provided at the front end of the hook-shaped arm 4, and the T-shaped portion 45 is located in the T-shaped slot 21 and is blocked by the limiting portion 22. The T-shaped slot 21 and the T-shaped portion 45 are provided to improve the stability and accuracy of the locking arm 2 and the hook-shaped arm 4.

[0022] Under normal conditions, the locking arm 2 and the unlocking button 5 are not affected by external forces. Under the action of the self-locking torsion spring 6, the front end of the locking arm 2 is stuck at the front end of the hook arm 4, and the straight segment 61 of the self-locking torsion spring 6 abuts against the bottom position of the protrusion 42. The straight segment 61 cannot move upward any further, and the rope opening A is in a closed state. The locking arm 2 cannot be pressed to rotate inwardly of the hook arm 4. The straight segment 61 pushes the upper part of the slide surface 55 into the through hole 41 of the hook arm 4, and the buckle is in a self-locking state.

[0023] After the unlocking button 5 is pressed, the upper part of the button portion 51 rotates along the engaging portion 53, so that the upper part of the slide surface 55 protrudes from the through hole 41 and lifts the front end of the self-locking torsion spring 6 from the bottom of the protrusion 42 to make it out of the stop position, and the buckle is in the unlocked state. After the locking arm 2 is pressed, the locking arm 2 rotates toward the inside of the hook arm 4, driving the straight section 61 of the self-locking torsion spring 6 to slide upward from the slide surface 55 over the protrusion 42 along the arc-shaped inclined surface 43, and the rope opening A gradually opens, and the buckle is in the open state.

[0024] When the external force pressing the locking arm 2 and the unlocking button 4 disappears, under the action of the self-locking torsion spring 6, the locking arm 2 is reset and drives the straight section 61 of the self-locking torsion spring 6 to move downward, and the straight section 61 abuts against the stop position at the bottom of the protrusion 42, closing the rope opening A, and the buckle returns to the self-locking state.

[0025] The locking arm 2 and the inner wall of the hook-shaped arm 4 form a rope receiving hole B. The rope passing hole A is communicated with the rope receiving hole B. When the rope passing hole A is in an open state, the rope passes through the rope passing hole A and enters and exits the rope receiving hole B, and the rope is connected to the hook-shaped arm 4. Another section of rope is arranged in the buckle 3, and the two sections of rope are connected to each other through a self-locking belt buckle.

[0026] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A self-locking buckle, comprising a buckle body, a locking arm and a buckle ring, wherein the buckle ring is arranged at the lower end of the buckle body, a hook-shaped arm is arranged at the upper end of the buckle body, a rope opening is arranged between the front end of the hook-shaped arm and the buckle body, the end of the locking arm is rotatably connected to the buckle body, and the front end of the locking arm is clamped at the front end of the hook-shaped arm, characterized in that: A through hole is provided on the hook-shaped arm, and an unlocking button is movably clamped in the through hole. A button part and a pushing part are respectively provided on the unlocking button, and the button part and the pushing part are respectively located on the left and right sides of the unlocking button. A slide surface is provided on the pushing part, and a protrusion is provided on the inner side surface of the hook-shaped arm. A self-locking torsion spring is provided on the locking arm, and the end of the self-locking torsion spring is provided on the locking arm. The front end of the self-locking torsion spring abuts against the bottom of the protrusion to prevent the locking arm from rotating, and pushes the upper part of the slide surface into the through hole of the hook-shaped arm. Under the action of pressing force, the upper part of the button part makes the upper part of the slide surface protrude from the through hole and lifts the front end of the self-locking torsion spring from the bottom of the protrusion, and the front end of the self-locking torsion spring moves from the slide surface over the protrusion along the inner wall surface of the hook-shaped arm.

2. The self-locking buckle according to claim 1, characterized in that: An elastic portion and a clamping portion are also provided on the unlocking button, respectively. The elastic portion is provided at the upper portion of the unlocking button, and the clamping portion is provided at the bottom of the unlocking button. The end of the elastic portion is connected to the pushing portion, and its front end extends toward the upper side of the unlocking button and is squeezed into the through hole. The clamping portion is clamped at the left and right ends of the through hole.

3. The self-locking buckle according to claim 1, characterized in that: An arc-shaped inclined surface is arranged on the upper part of the protrusion, and the front end of the self-locking torsion spring moves up and down along the arc-shaped inclined surface.

4. The self-locking buckle according to claim 1, characterized in that: An arc segment is arranged at the top end of the protrusion.

5. The self-locking buckle according to claim 1, characterized in that: A straight section is provided at the front end of the self-locking torsion spring, and the straight section abuts against the bottom of the protrusion to prevent the locking arm from rotating.

6. The self-locking buckle according to claim 1, characterized in that: A first rotating shaft is also arranged on the buckle body, and the end of the locking arm is rotatably connected to the buckle body through the first rotating shaft.

7. The self-locking buckle according to claim 1, characterized in that: A T-shaped groove and a limiting portion are respectively arranged at the ends of the locking arms, and a T-shaped portion is arranged at the front end of the hook-shaped arm. The T-shaped portion is located in the T-shaped groove and is blocked by the limiting portion.

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