SNAP CLOSURE

Abstract

SNAP CLASP The present invention relates to a snap clasp comprising a base and a pressure plate, the base comprising a seat (1) one end of which is fixedly connected to a first end of a strap and the other end of which is provided with a first hole through which a second end of the strap passes; the two sides of the seat (1) are each provided with a lateral connecting portion (3) having a second hole; the pressure plate comprises a pressure portion (5) connected to a rotating portion connected to a locking portion having one end provided with locking teeth; the two sides of the rotating portion are each provided with a rotating shaft, the rotating shafts being respectively restricted to rotate in the second holes; a torsion spring is connected between the seat (1) and the pressure portion. Figure to be published with the abstract: Figure 1

Description

Title of the invention: PRESSURE CLASP Technical field

[0001] The present invention relates to the technical field of clasps for binding straps, and in particular a pressure clasp. STATE OF THE ART

[0002] The binding strap is used to fix goods during transportation, movement or storage. It is light and reliable, saves time, is widely applicable and can effectively prevent damage caused by falling or moving. One end of the binding strap is provided with a locking pressure clasp and the other end is a free end, after the goods are bound and fixed using the binding strap, the free end should be inserted into the locking pressure clasp, and then the final locking of the binding strap is performed using the locking pressure clasp. Therefore, the fixing force of the locking pressure clasp affects the fixing effect of the binding strap on the goods, as well as the stability and safety during use.

[0003] Document CN218737539U discloses an anti-skid pressure clasp, wherein the pressure clasp comprises a pressure clasp base, pressure clasp teeth and a foldable operating handle. The pressure clasp teeth are hingedly mounted on the pressure clasp base, and the operating handle is fixed to the pressure clasp teeth, and the operating handle drives the pressure clasp teeth to swing down or up. One end of the strap is inserted between the pressure clasp base and the pressure clasp teeth, thereby locking the strap when the pressure clasp teeth swing down and releasing the strap when the pressure clasp teeth swing up.

[0004] In the above solution, the locking and releasing of the strap are controlled by turning over the handle, such operation is convenient, but the components of the anti-slip pressure clasp are numerous, and the handle is likely to loosen or even fall off or break due to repeated turning over for a long time, resulting in insufficient fixing force of the pressure clasp teeth, and the strap is likely to be accidentally released during use, which is a potential safety hazard. DISCLOSURE OF THE INVENTION

[0005] In this respect, the present invention aims to provide a pressure clasp with a simpler and more stable structure and a stronger locking force, making it possible to improve safety when using a binding strap. The present invention particularly comprises the following solution:

[0006] - a pressure clasp, comprising a base and a pressure plate, the base comprising a seat, one end of the seat is fixedly connected to a first end of a strap, the other end of the seat is provided with a first hole for passing the second end of the strap; the two sides of the seat are each provided with a lateral connecting portion, and the lateral connecting portions are provided with second holes;

[0007] - the pressure plate comprises a pressure portion, the pressure portion is connected to a rotating portion, the rotating portion is connected to a locking portion, the end of the locking portion is provided with locking teeth; both sides of the rotating portion are each provided with a rotating shaft, and the rotating shafts are restricted to rotate respectively within the second holes;

[0008] - a torsion spring is connected between the seat and the pressure portion, the seat and the pressure portion are each provided with a stop restricting two force arms of the torsion spring, the locking teeth bear against the seat under the action of the torsion spring when the pressure portion is not subjected to a pressure force, thereby locking the second end of the strap passing through the second hole on the seat.

[0009] Preferably, the base and the pressure plate are both formed as a single piece.

[0010] Preferably, the rotatable portion is lifted upwards relative to the locking portion and the pressing portion is lifted upwards relative to the rotatable portion, respectively.

[0011] Preferably, the end of the pressure portion is in the form of a downwardly curved arc of a circle.

[0012] Preferably, the two force arms of the torsion spring are oriented simultaneously towards one of the lateral connecting portions.

[0013] Preferably, the seat is provided with a first stop, an angle between the side of the first stop facing the torsion spring and the seat does not exceed 90°, and one of the force arms of the torsion spring is restricted in a space formed by the seat and the first stop.

[0014] Preferably, the lower surface of the pressure portion is provided with a second stop, the second stop extends toward the seat, and the other force arm of the torsion spring is restricted in a space formed by the lower surface of the pressure portion and the second stop.

[0015] Preferably, the outer side of the first hole is provided with an adjustment portion of the strap projecting upward and having a curved surface, and the second end of the strap is overlapped on the adjustment portion of the strap after passing through the first hole.

[0016] Preferably, the locking teeth are oriented downwards, the locking teeth fall into the first hole when the pressure portion is not subjected to a pressure force, and at least a portion of the outer wall of the locking portion bears against the wall of the first hole.

[0017] Preferably, one end of the seat is provided with a third hole, the first end of the strap being secured to the strap body after passing through the third hole; the pressure clasp is made of steel or plastic.

[0018] The technical solution claimed by the present invention makes it possible to obtain the following beneficial effects:

[0019] The pressure clasp of the present invention comprises only three components, namely the base, the pressure plate and the torsion spring, which can form a simple structure and reduce the production cost. The base, the pressure plate and the torsion spring are connected to each other firmly and stably, so that the strap can be firmly locked on the base under the action of the force of the torsion spring, thereby improving the locking force and safety when using the strap. BRIEF DESCRIPTION OF THE FIGURES

[0020] In order to illustrate more clearly the technical solutions in the embodiments of the present invention, the figures in the embodiments will be briefly described below, and it will be obvious that the figures in the following description are only embodiments of the present invention, and that for those skilled in the art, other figures can be obtained without creative work based on the figures provided.

[0021] [Fig-1] shows a three-dimensional front schematic view of a pressure clasp;

[0022] [Fig.2] shows a three-dimensional schematic rear view of a clasp of pressure ;

[0023] [Fig.3] shows a right-hand view of the pressure clasp of [Fig.l];

[0024] [Fig.4] shows a left view of the pressure clasp of [Fig.l];

[0025] [Fig.5] shows a top view of the pressure clasp of [Fig.l];

[0026] [Fig.6] shows a bottom view of the pressure clasp of [Fig.l];

[0027] [Fig.7] shows a front view of the pressure clasp of [Fig.l];

[0028] [Fig.8] shows a three-dimensional schematic view of the base;

[0029] [Fig.9] shows a three-dimensional schematic view of the pressure portion;

[0030] [Fig. 10] shows a three-dimensional schematic view of a torsion spring.

[0031] [Fig. 11] shows a schematic view of a pressure clasp with a strap and a hole ring;

[0032] [Fig. 12] shows the results of a type 1 tensile test; and

[0033] [Fig. 13] shows the results of a type 2 tensile test.

[0034] In the figures, the references are as follows: 1- Seat; 2- First hole; 3- Lateral connecting portion; 4- Second hole; 5- Pressure portion; 6- Rotating portion; 7- Locking portion; 8- Locking teeth; 9- Rotating shaft; 10- Torsion spring; 11- First stop; 12- Second stop; 13- Strap adjustment portion; 14- Third hole; 15- Strap; 16- Hole ring; 17- Force arm. DETAILED DESCRIPTION OF EMBODIMENT

[0035] In order to clarify the purpose, technical solutions and beneficial effects of the embodiments of the present invention, the technical solutions of the embodiments of the present invention will be described clearly and completely in the following description with reference to the figures of the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work should be included within the scope of the present invention.

[0036] The orientations in the present embodiment are all described with respect to the pressure clasp which is placed horizontally.

[0037] Referring to Figures 1 to 11, the present embodiment provides a pressure clasp which may be made of steel or plastic, or various other novel materials. It comprises a base and a pressure plate, the base and the pressure plate are preferably made in one piece. The base comprises a seat 1, one end of the seat 1 is fixedly connected to a first end of a strap 15, the other end of the seat 1 is provided with a first hole 2 for passing a second end of the strap; the two sides of the seat 1 are each provided with a lateral connecting portion 3, and the lateral connecting portions 3 are each provided with a second hole 4.

[0038] The pressure plate comprises a pressure portion 5, the pressure portion 5 is connected to a rotating portion 6, the rotating portion 6 is connected to a locking portion 7, the locking portion 7 is provided with locking teeth 8 at the end of the locking portion 7; both sides of the rotating portion 6 are each provided with a rotating shaft 9, and the rotating shafts 9 are restricted to rotate respectively within the second holes 4.

[0039] A torsion spring 10 is connected between the seat 1 and the pressure portion 5, the seat 1 and the pressure portion 5 are each provided with a stop restricting the two force arms of the torsion spring 10, the locking teeth 8 bear against the seat 1 under the action of the torsion spring when the pressure portion 5 is not subjected to a pressing force, thereby locking the second end of the strap passing through the second hole 2 on the seat 1. When the pressure portion 5 is subjected to a downward pressing force, the rotating shaft rotates in the second hole and the locking portion is forced to move upward, the locking teeth are then disengaged from the base to adjust the strap.

[0040] In the present embodiment, the pressure clasp comprises only three components, namely the base, the pressure plate and the torsion spring, thereby forming a simple structure and reducing the production cost. The base, the pressure plate and the torsion spring are firmly connected to each other, so that the strap can be firmly locked on the base under the action of the force of the torsion spring, thereby improving the locking force and safety in use.

[0041] Referring to [Fig.9], in a preferred solution, the rotating portion 6 is raised upwards relative to the locking portion 7 and the pressing portion 5 is raised upwards relative to the rotating portion 6, respectively. In order to make the pressing portion more ergonomic and easier to handle, the end of the pressing portion 5 is in the form of a downwardly curved arc of a circle.

[0042] In a preferred solution, with reference to Figures 3 and 10, the two force arms of the torsion spring 10 are oriented simultaneously towards one of the lateral connection portions 3.

[0043] In an illustrative solution, the seat 1 is provided with a first stop 11, an angle between the side of the first stop 11 facing the torsion spring 10 and the seat 1 not exceeding 90°, and one of the force arms of the torsion spring 10 is restricted in a space formed by the seat 1 and the first stop 11.

[0044] In an illustrative solution, with reference to [Fig.9], the lower surface of the pressing portion 5 is provided with a second stop 12, the second stop 12 extends toward the seat 1, and the other force arm of the torsion spring 10 is restricted in a space formed by the lower surface of the pressing portion 5 and the second stop 12. The first stop and the second stop work together in both directions to limit the torsion spring, prevent the torsion spring from disengaging from the structure, improve the strength of the combination between the different structures of the pressing clasp, and better play a locking role.

[0045] In a preferred solution, the outer side of the first hole 2 is provided with a strap adjustment portion 13 projecting upwards and having a curved surface, and the second end of the strap is overlapped on the strap adjustment portion 13 after passing through the first hole 2. The length of the strap can be adjusted when the locking teeth are moved away from the base in applying force to the pressure portion. The surface of the strap adjustment portion has a circular arc shape, the strap can be adjusted by pressing the strap directly against the surface and pulling the strap with a small force.

[0046] In a preferred solution, the locking teeth 8 are oriented downwards, the locking teeth 8 fall inside the first hole 2 when the pressure portion 5 is not subjected to a pressure force, and at least part of the outer wall of the locking portion 7 bears against the wall of the first hole 2. When the locking teeth are oriented downwards, a force perpendicular to the strap can be applied to the latter, so that it is less likely to come loose or slip, which allows the strap to be used for securing heavier goods.

[0047] In a preferred solution, one end of the seat 1 is provided with a third hole 14, the first end of the strap is fixed to the body of the strap after passing through the third hole 14. Optionally, the pressure clasp of the present embodiment may also be provided with a hole ring 16 through which the strap passes, and the strap may be arranged by sliding the hole ring over the strap.

[0048] A tensile test is carried out on the strap after tightening the pressure clasp of the present embodiment, and the results are shown in the table below and in Figures 12 to 13. Sample number Maximum force / N Strain at maximum force / mm Maximum strain / mm At Total elongation % Elongation at maximum force % 1 2806.9 80.262 80.43 80.4 80 2 2581.4 65.022 65.36 65.4 65

[0049] According to the above results, the strap, after being tightened using the pressure clasp of the present embodiment, can withstand a maximum tensile force of 2806.9 N, indicating that the pressure clasp of the present embodiment is capable of providing improved locking force and security.

[0050] The embodiments described above are only illustrative descriptions of the present invention and are not intended to limit the scope of the present invention. Any variations and improvements made by those skilled in the art based on the technical solutions of the present invention should be included within the scope of the present invention.

Claims

Claims

1. A pressure clasp, characterized in that it comprises a base and a pressure plate, the base comprising a seat (1), one end of the seat (1) being fixedly connected to a first end of a strap, the other end of the seat (1) being provided with a first hole (2) for passing the second end of the strap; the two sides of the seat (1) each being provided with a lateral connecting portion (3), and the lateral connecting portions (3) being provided with second holes (4); wherein the pressure plate comprises a pressure portion (5), the pressure portion (5) is connected to a rotating portion (6), the rotating portion (6) is connected to a locking portion (7), the end of the locking portion (7) is provided with locking teeth (8);the two sides of the rotating portion (6) are each provided with a rotating shaft (9), and the rotating shafts (9) are restricted to rotate respectively within the second holes (4); wherein a torsion spring (10) is connected between the seat (1) and the pressing portion (5), the seat (1) and the pressing portion (5) are each provided with a stopper restricting two force arms of the torsion spring (10), the locking teeth (8) bear against the seat (1) under the action of the torsion spring when the pressing portion (5) is not subjected to a pressing force, thereby locking the second end of the strap passing through the second hole (2) on the seat (1).;

2. A pressure clasp according to claim 1, characterized in that the base and the pressure plate are both formed as a single piece.

3. Pressure clasp according to claim 2, characterized in that the rotating portion (6) is raised upwards relative to the locking portion (7), and the pressure portion (5) is raised upwards relative to the rotating portion (6), respectively.

4. Pressure clasp according to claim 3, characterized in that the end of the pressure portion (5) is in the form of a downwardly curved circular arc.

5. Pressure clasp according to claim 3, characterized in that the two force arms of the torsion spring (10) are oriented simultaneously towards one of the lateral connecting portions (3).

6. Pressure clasp according to claim 5, characterized in that the seat (1) is provided with a first stop (11), an angle between the side of the first stop (11) oriented towards the torsion spring (10) and the seat (1) does not exceed 90°, and one of the force arms of the torsion spring (10) is restricted in a space formed by the seat (1) and the first stop (11).

7. A pressure clasp according to claim 5, characterized in that the lower surface of the pressure portion (5) is provided with a second stop (12), the second stop (12) extends toward the seat (1), and the other force arm of the torsion spring (10) is restricted in a space formed by the lower surface of the pressure portion (5) and the second stop (12).

8. A snap fastener according to claim 3, characterized in that the outer side of the first hole (2) is provided with a strap adjustment portion (13) projecting upwards and having a curved surface, and the second end of the strap is overlapped on the strap adjustment portion (13) after passing through the first hole (2).

9. Pressure clasp according to claim 3, characterized in that the locking teeth (8) are oriented downwards, the locking teeth (8) fall into the first hole (2) when the pressure portion (5) is not subjected to a pressure force, and at least a part of the outer wall of the locking portion (7) bears against the wall of the first hole (2).

10. A pressure clasp according to claim 3, characterized in that one end of the seat (1) is provided with a third hole (14), the first end of the strap being fixed to the strap body after passing through the third hole (14); and the pressure clasp is made of steel or plastic.

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