CN113815201B - A buckle has two different angles of mold release structure - Google Patents

Abstract

The invention discloses a mold ejection structure with two different angles for a buckle. piece. The first slider is slid on the first thimble plate, and the top block is arranged inside the first thimble plate; the second slider is slid on the second thimble plate. The pull hook hooks the top block; the lower part of the lower mold has a limit slot, and the moving block is slid to be set in the limit slot. When the motion block reaches the top of the limit slot, the top block retracts; The upper end of the first inclined bar is fixed with the first inclined roof; the lower end of the second inclined bar is fixed on the second slider, and the upper end of the second inclined bar is fixed with the second inclined roof. The invention effectively combines the two slanted roofs through the mechanical structure, so that the two slanted roofs will not interfere with each other when they are ejected from the mold. The ejector pin of the injection molding machine only needs to be ejected once during the entire mold ejection process, which ensures production efficiency and avoids unnecessary equipment loss.

Description

A buckle has two different angles of mold release structure

technical field

The invention relates to a mold-drawing structure, in particular to a mold-drawing structure with two different angles for buckles.

Background technique

The present invention is specifically applied to a certain injection molding product, and its schematic diagram is shown in FIG. 1 . If there is an inclined surface on the top of the product, the buckles that form the surface here need to move obliquely downward to release the mold. At the same time, the lower structure of the product needs to match the sheet metal, so the buckles that form the surface here need to move horizontally to be released. In this way, the buckles of the two profiles need to move in two directions when they are ejected from the mold. Generally, when designing the mold release structure, the buckle is ejected by using the inclined top. The inclined top and the buckle are integrally connected. The mold needs to move in two directions. If two inclined roofs are designed to be ejected at the same time, it will inevitably cause motion interference (as shown in Figure 2), which will affect the effect of mold release. If the mold ejection of the two inclined roofs is completely divided into For two movements, it is necessary for the top rod of the injection molding machine to push out two inclined ejectors twice, which will reduce production efficiency and increase equipment loss.

Contents of the invention

The purpose of the present invention is to provide a mold ejection structure with two different angles for the buckle, which effectively combines two inclined roofs (the inclined roof and the buckle are integrally connected) through a mechanical structure, so that the mold ejection of the two inclined roofs can The ejection of the ejector pins of the injection molding machine is completed successively, so that the two inclined ejectors do not interfere with each other when ejecting the mold, while ensuring production efficiency and avoiding unnecessary equipment loss.

Technical scheme of the present invention is:

A buckle has two ejection structures with different angles, including:

Upper mold, upper mold fixing plate, lower mold and lower mold fixing plate;

Also includes:

The first ejector plate, the first ejector plate is located above the fixed plate of the lower die, the first ejector plate slides and is provided with a first slider; the first ejector plate is provided with a jack block; the first ejector plate is provided with an ejector hole, The ejector pin hole runs through the first ejector pin plate and the lower die fixing plate;

The second ejector plate, the second ejector plate is located above the first ejector plate, and the second ejector plate is slid to be provided with a second slider; the lower part of the second ejector plate is provided with a drag hook, and the drag hook hooks the ejector block when the ejector block is ejected;

Ejector, the ejector is set at the lower part of the lower die, and the ejector can retract the ejector block;

The movement block, the lower part of the lower mold has a limit slot, the movement block is slidably set in the limit slot, and the top block retracts when the movement block reaches the top of the limit slot;

The first slanting rod, the lower end of the first slanting rod is fixed on the first slider, the upper end of the first slanting rod is fixed with the first slanting top, the upper part of the lower mold is opened with a first limit hole, and the first slanting rod fits in the first limiting hole. inside the bit hole;

The second inclined rod, the lower end of the second inclined rod is fixed on the second slider, the upper end of the second inclined rod is fixed with the second inclined top, the second inclined top is located above the first inclined top, and the second limit position is opened in the moving block hole, and the second oblique rod fits in the second limiting hole.

A kind of buckle in this scheme has two different angles of the die structure, the upper mold and the lower mold form most of the product surface, the upper mold fixing plate and the lower mold fixing plate are used to fix the upper mold and the lower mold respectively, the product After forming, the upper mold and the upper mold fixing plate are removed, that is, the mold is opened. When ejecting the mold, the ejector pin of the injection molding machine penetrates through the ejector pin hole, and lifts the second ejector plate from bottom to top. The ejector plate drives the first ejector plate to move upward together. At this stage, the first slanting rod and the first slanting top, the second slanting rod and the second slanting top all move upwards. Since the moving block can slide along the limiting groove, the second limiting hole does not affect the movement of the second slanting rod. Therefore, the second slanting rod and the second slanting top can only move upwards at this stage; since the lower die is fixed, the first limiting hole constrains the movement of the first slanting rod, forcing it to move upwards while moving horizontally (p. The sliding direction of the first slider), so that the first inclined top is ejected from the mold. When the moving block reaches the top of the limit groove, the ejector rod retracts the ejector block, the second ejector plate is separated from the first ejector plate, the movement of the first ejector plate stops and the ejection of the first inclined ejector is completed, and the second ejector plate is The injection molding machine continues to move upwards under the action of the top stick. At this time, the moving block is stuck in the limit groove and cannot move. The second limit hole restricts the movement of the second oblique rod, forcing it to move upward and obliquely downward at the same time ( The sliding direction of the second slider), so that the second ramp ejection is completed until the second ramp ejection is completed.

A buckle of this scheme has two ejection structures with different angles, which divides the movement of the first inclined ejector and the second inclined ejector into In the first stage, both the first inclined roof and the second inclined roof move upwards. In this stage, the moving block can slide along the limit groove, so the second inclined roof only moves upwards. Since the movement of the first inclined rod is limited by the first The position hole is constrained, and the first slanting ejector is ejected at this stage; the second ejector plate is separated from the first ejector plate in the second stage, the movement of the first ejector plate stops, and the second ejector plate continues to move upwards, at this time the moving block is stuck Incapable of movement in the limiting slot, the second limiting hole constrains the movement of the second inclined rod, and the second inclined roof is ejected at this stage. In the first stage, only the first slanted roof is ejected, and the second slanted roof is still relative to the product. In the second stage, the first slanted roof is ejected, the second slanted roof is ejected, and the two slanted roofs are ejected step by step. , will not interfere with each other. The ejector pin of the injection molding machine only needs to be ejected once during the entire mold ejection process, which ensures production efficiency and avoids unnecessary equipment loss.

A kind of buckle in this scheme has two ejection structures with different angles. During the whole movement process, the product is kept moving in the vertical direction under the support of the thimble (not shown in the figure), so that the first inclined ejector and the second inclined ejector The top can complete the mold release.

Preferably, the parallelism error between the sliding plane of the first slider and the product contact surface of the first inclined roof is 0.01mm~0.03mm. In order to ensure the quality of the mold release and avoid the product from being damaged when the first inclined ejector is ejected, the parallelism error between the sliding plane of the first slider and the product contact surface of the first inclined ejector must be strictly controlled. The product contact surface of the first inclined roof is a horizontal plane, which is less difficult to process, and the parallelism accuracy of the two can be appropriately higher.

Preferably, the parallelism error between the sliding plane of the second slider and the product contact surface of the second inclined roof is 0.02mm~0.03mm. In order to ensure the quality of the mold release and avoid the product from being damaged when the second inclined ejector is ejected, the parallelism error between the sliding plane of the second slider and the contact surface of the product on the second inclined ejector must be strictly controlled. The product contact surface of the second inclined roof is an inclined surface, which is difficult to process, and the parallelism accuracy of the two can be appropriately lower.

Preferably, the included angle between the axis of the first inclined bar and the horizontal plane is 70°-80°, and the included angle between the axis of the second inclined bar and the horizontal plane is 70°-80°. The larger the angle between the axis of the first inclined bar and the horizontal plane, the smaller the resistance and the lower the wear when the first inclined bar moves. The smaller the vertical displacement, the shorter the production cycle and the less space it takes up. Therefore, the angle between the axis of the first slant bar and the horizontal plane should be a large value as needed, and the angle between the axis of the second slant bar and the horizontal plane Same as above.

Preferably, the four corners of the horizontal section of the moving block are all rounded. This is beneficial to the assembly of the moving block, and is beneficial to reducing the resistance of the moving block caused by processing errors when moving.

Preferably, the lower end of the ejector rod is provided with a slope for pressing the ejector block. The inclined plane has a simple structure, which is convenient for processing and controlling the movement of the top block.

Preferably, the included angle between the slope at the lower end of the ejector rod and the horizontal plane is 50°-70°. The larger the angle between the slope at the lower end of the ejector rod and the horizontal plane, the smaller the resistance and the lower the wear when the ejector rod squeezes the top block, the smaller the angle between the slope at the lower end of the ejector rod and the horizontal plane, the smaller the first ejector plate and The smaller the vertical displacement required for the separation of the second ejector plate, the angle between the inclined surface at the lower end of the ejector rod and the horizontal plane should be appropriately selected according to the needs, but it must be ensured that the first ejector plate and the second ejector plate are separated. The ejection mold is completed.

Preferably, the contact surface between the first inclined roof and the second inclined roof is a slope. In this way, the resistance encountered when the first inclined ejector is ejected can be reduced, which is beneficial to the ejection of the first inclined ejector. It should be understood that in order to enable the first ramp to be ejected smoothly, the inclination direction of the contact surface of the first ramp and the second ramp is determined, otherwise it will cause the first ramp to be ejected from the mold with the second ramp. interference occurs.

The beneficial effects of the present invention are: the two inclined roofs are effectively combined through the mechanical structure, so that the ejection of the two inclined roofs is divided into two stages. In the first stage, only the first inclined roof is ejected, and the second inclined roof The top is still relative to the product. In the second stage, the ejection of the first inclined ejection is completed, and the ejection of the second inclined ejection is completed step by step without interfering with each other. The ejector pin of the injection molding machine only needs to be ejected once during the entire mold ejection process, which ensures production efficiency and avoids unnecessary equipment loss.

Description of drawings

Fig. 1 is a schematic diagram of the products involved in the present invention.

Fig. 2 is a schematic diagram of the movement direction when the product is snapped out of the mold according to the present invention.

Fig. 3 is a left view of the present invention.

Fig. 4 is a sectional view of plane A-A in Fig. 3 .

Fig. 5 is a sectional view of plane B-B in Fig. 3 .

Fig. 6 is a schematic diagram of the completion of the first inclined ejection mold.

Fig. 7 is a schematic diagram of the completion of the second inclined ejector ejection.

In the picture:

upper mold 1;

Upper die fixing plate 2;

Lower mold 3;

Lower mold fixing plate 4;

The first ejector plate 5;

first slider 6;

top block 7;

Top stick hole 8;

The second ejector plate 9;

second slider 10;

Pull hook 11;

Ejector 12;

Movement block 13;

Limiting groove 14;

first diagonal bar 15;

The first inclined roof 16;

The first limiting hole 17;

second diagonal rod 18;

The second inclined roof 19;

The second limiting hole 20.

Detailed ways

In order to make the objectives, technical solutions and advantages of the technical solution embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention are clearly explained and described below in conjunction with the accompanying drawings, but the following embodiments are only preferred embodiments of the present invention, and Not all examples. Based on the examples in the implementation manners, other examples obtained by those skilled in the art without making creative efforts all belong to the protection scope of the present invention.

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary, and are only used to explain the present solution, and cannot be construed as limiting the present invention.

These and other aspects of embodiments of the invention will become apparent with reference to the following description and drawings. In these descriptions and drawings, some specific implementation manners in the embodiments of the present invention are specifically disclosed to represent some ways of implementing the principles of the embodiments of the present invention, but it should be understood that the scope of the embodiments of the present invention is not limited by this limit. On the contrary, the embodiments of the present invention include all changes, modifications and equivalents falling within the spirit and scope of the appended claims.

In describing the present invention, it is to be understood that the terms "thickness", "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "circumferential" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientation. construction and operation, therefore, should not be construed as limiting the invention. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined, and "several" means one or more.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated: it can be mechanically connected, or electrically connected, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediary, it can be the internal communication of two components or the interaction relationship between two components, Unless expressly defined otherwise. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

Specific embodiment one: as shown in Figure 3 to Figure 7, a buckle has two different angles of the mold release structure, including:

Upper mold 1, upper mold fixing plate 2, lower mold 3 and lower mold fixing plate 4;

Also includes:

The first ejector plate 5, the first ejector plate 5 is located above the lower die fixing plate 4, the first ejector plate 5 is slid to be provided with a first slider 6; the first ejector plate 5 is provided with a jacking block 7; the first ejector plate There is a top pin hole 8 on the top 5, and the top pin hole 8 runs through the first ejector plate 5 and the lower mold fixing plate 4;

The second ejector plate 9, the second ejector plate 9 is located above the first ejector plate 5, and the second ejector plate 9 is provided with a second slide block 10; When the pull hook 11 hooks the top block 7;

The ejector pin 12, the ejector pin 12 is arranged at the lower part of the lower mold 3, and the ejector pin 12 can retract the ejector block 7;

The moving block 13, the lower part of the lower mold 3 has a limiting groove 14, the moving block 13 is slidably arranged in the limiting groove 14, and the top block 7 retracts when the moving block 13 reaches the top of the limiting groove 14;

The first slanting rod 15, the lower end of the first slanting rod 15 is fixed on the first slider 6, the upper end of the first slanting rod 15 is fixed with the first slanting top 16, the upper part of the lower mold 3 has a first limiting hole 17, the first The oblique rod 15 fits in the first limiting hole 17;

The second slant bar 18, the second slant bar 18 lower end is fixed on the second slide block 10, the second slant bar 18 upper end is fixed with the second slant top 19, the second slant top 19 is positioned above the first slant top 16, and the moving block A second limiting hole 20 is opened in 13, and the second oblique rod 18 fits in the second limiting hole 20.

A buckle in this embodiment has two mold-out structures with different angles. The upper mold 1 and the lower mold 3 form most of the profile of the product, and the upper mold fixing plate 2 and the lower mold fixing plate 4 are used to fix the upper mold respectively. 1 and lower mold 3. After the product is formed, the upper mold 1 and the upper mold fixing plate 2 are removed, that is, the mold is opened. When ejecting the mold, the ejector pin of the injection molding machine penetrates through the ejector pin hole 8, and lifts the second ejector plate 9 from bottom to top. The ejector block 7 makes the second ejector plate 9 drive the first ejector plate 5 to move upward together. At this stage, the first inclined bar 15 and the first inclined top 16, the second inclined bar 18 and the second inclined top 19 all move upwards, and since the moving block 13 can slide along the limiting groove 14, the second limiting hole 20 is opposite to the first The movement of the second slanting rod 18 is not restricted, so the second slanting rod 18 and the second slanting top 19 only move upward at this stage; since the lower die 3 is fixed, the movement of the first limiting hole 17 to the first slanting rod 15 Carry out restraint, force it to move upward while moving horizontally (the sliding direction of the first slider 6), so that the first inclined roof 16 is released from the mold. When the moving block 13 reaches the top of the limit groove 14, the ejector rod 12 retracts the ejector block 7, the second ejector plate 9 is separated from the first ejector plate 5, the movement of the first ejector plate 5 stops and the first inclined ejector 16 comes out. After the mold is completed, the second ejector plate 9 continues to move upward under the action of the ejector stick of the injection molding machine. At this time, the moving block 13 is stuck in the limiting groove 14 and cannot move, and the second limiting hole 20 controls the movement of the second inclined rod 18. Constraints force it to move upwards and move obliquely downwards (the sliding direction of the second slide block 10 ), so that the second inclined roof 19 is ejected until the second inclined roof 19 is ejected.

A buckle in this embodiment has two ejection structures with different angles, which connects the first inclined ejector 16 and the second ejector plate 16 through the first ejector plate 5, the second ejector plate 9, the ejector rod 12, the ejector block 7 and the pull hook 11. The movement of the two inclined roofs 19 is divided into two stages. In the first stage, the first inclined roof 16 and the second inclined roof 19 all move upwards. In this stage, the moving block 13 can slide along the limit groove 14, so the second inclined roof 19 only moves upwards. Moving upward, because the movement of the first inclined rod 15 is restricted by the first limiting hole 17, the first inclined ejector 16 is ejected at this stage; the second ejector plate 9 is separated from the first ejector plate 5 in the second stage, and the first ejector plate 5 stops, and the second thimble plate 9 continues to move upwards. At this time, the moving block 13 is stuck in the limiting groove 14 and cannot move. The second limiting hole 20 constrains the movement of the second inclined rod 18. The second inclined Top 19 is ejected at this stage. In the first stage, only the first inclined roof 16 is released from the mold, and the second inclined roof 19 is still relative to the product. In the second stage, the first inclined roof 16 is ejected, the second inclined roof 19 is ejected, and the two The modules are completed step by step without interfering with each other. The ejector pin of the injection molding machine only needs to be ejected once during the entire mold ejection process, which ensures production efficiency and avoids unnecessary equipment loss.

A buckle of this embodiment has two ejection structures with different angles. During the whole movement process, the product is kept moving in a vertical direction under the support of the thimble (not shown in the figure), so that the first inclined ejector 16 and the second inclined ejector 16 Two inclined tops 19 can complete demoulding. As shown in Fig. 4 and Fig. 5, in order to avoid interference during assembly and ejection, cavities are provided at necessary positions in the first ejector plate 5, the moving block 13 and the lower die 3.

Further, the parallelism error between the sliding plane of the first slider 6 and the product contact surface of the first inclined roof 16 is 0.01mm~0.03mm. In order to ensure the quality of the mold release and avoid straining the product when the first inclined top 16 is ejected, the parallelism error between the sliding plane of the first slider 6 and the product contact surface of the first inclined top 16 must be strictly controlled. The sliding plane of the sliding plane and the product contact surface of the first inclined roof 16 are horizontal planes, the processing difficulty is small, and the parallelism precision of the two can be suitably higher.

Further, the parallelism error between the sliding plane of the second sliding block 10 and the product contact surface of the second inclined roof 19 is 0.02mm~0.03mm. In order to ensure the quality of the mold release and avoid the product from being damaged when the second inclined top 19 is ejected, the parallelism error between the sliding plane of the second slider 10 and the product contact surface of the second inclined top 19 must be strictly controlled. The sliding plane of the sliding plane and the product contact surface of the second inclined roof 19 are inclined surfaces, which are difficult to process, and the parallelism accuracy of the two can be appropriately lower.

Further, the included angle between the axis of the first inclined bar 15 and the horizontal plane is 70°-80°, and the included angle between the axis of the second inclined bar 18 and the horizontal plane is 70°-80°. The larger the included angle between the axis of the first inclined bar 15 and the horizontal plane, the smaller the resistance and the lower the wear and tear of the first inclined bar 15 when it moves, and the smaller the included angle between the axis of the first inclined bar 15 and the horizontal plane, the injection molding The smaller the vertical displacement of the top stick, the shorter the production cycle and the less space it takes up. Therefore, the angle between the axis of the first slant bar 15 and the horizontal plane should be a large value as required, and the axis of the second slant bar 18 The included angle with the horizontal plane is the same as above.

Further, the four corners of the horizontal section of the moving block 13 are all rounded. This is beneficial to the assembly of the moving block 13 and helps to reduce the resistance of the moving block 13 when moving due to machining errors.

Further, the lower end of the push rod 12 is provided with an inclined surface for pressing the top block 7 . The inclined plane has a simple structure and is convenient for processing and controlling the movement of the top block 7 . In other embodiments, an arc surface or a rolling pulley may also be provided at the lower end of the push rod 12 .

Further, the angle between the inclined surface at the lower end of the ejector rod 12 and the horizontal plane is 50°-70°. The larger the angle between the inclined surface of the lower end of the ejector rod 12 and the horizontal plane, the smaller the resistance and the lower the wear and tear when the ejector rod 12 squeezes the top block 7, and the smaller the angle between the inclined surface of the lower end of the ejector rod 12 and the horizontal plane, the smaller the angle between the lower end of the ejector rod 12 and the horizontal plane The vertical displacement required for the separation of the first ejector plate 5 and the second ejector plate 9 is smaller, so the angle between the inclined surface at the lower end of the ejector rod 12 and the horizontal plane should be appropriately selected according to needs, but it must be ensured that the first ejector plate 5 and the second ejector plate When the two ejector pin plates 9 were separated, the first inclined ejector 16 was ejected from the mold and completed.

Further, the contact surface of the first inclined roof 16 and the second inclined roof 19 is an inclined plane. In this way, the resistance encountered when the first inclined roof 16 is ejected from the mold can be reduced, which is beneficial to the ejection of the first inclined roof 16 . It should be understood that, in order to make the first inclined roof 16 can be ejected smoothly, the inclination direction of the contact surface of the first inclined roof 16 and the second inclined roof 19 is determined, otherwise it will cause the first inclined roof 16 to be ejected from the mold. Interference occurs in the second inclined roof 19 , as shown in FIG. 4 and FIG. 6 .

The above are only preferred embodiments of the present invention, and do not limit the present invention in any way. All simple modifications, changes and equivalent transformations made to the above embodiments according to the technical essence of the present invention still belong to the technical solution of the present invention. scope of protection.

Claims (8)

1. A buckle has two different angles of mold release structure, including: Upper mold (1), upper mold fixing plate (2), lower mold (3) and lower mold fixing plate (4); It is characterized in that it also includes: The first ejector plate (5), the first ejector plate (5) is located above the lower mold fixing plate (4), and the first ejector plate (5) is slid to be provided with a first slider (6); the first ejector plate (5) ) is provided with a top block (7); the first ejector plate (5) is provided with an ejector hole (8), and the ejector hole (8) runs through the first ejector plate (5) and the lower die fixing plate (4); The second ejector plate (9), the second ejector plate (9) is located above the first ejector plate (5), and the second ejector plate (9) is slidingly provided with a second slider (10); the second ejector plate (9) ) is provided with a pull hook (11) at the bottom, when the push rod (12) is not acting on the top block (7), the top block (7) is ejected, and the pull hook (11) hooks the top block (7); The ejector pin (12), the ejector pin (12) is arranged on the lower part of the lower die (3); The movement block (13), the limit slot (14) is opened at the lower part of the lower mold (3), and the movement block (13) is slid to be set in the limit slot (14). When the movement block (13) reaches the top of the limit slot (14) , the ejector rod (12) retracts the ejector block (7), and the second ejector plate (9) is separated from the first ejector plate (5); The first inclined rod (15), the lower end of the first inclined rod (15) is fixed on the first slider (6), the upper end of the first inclined rod (15) is fixed with the first inclined top (16), the lower mold (3) There is a first limit hole (17) on the upper part, and the first inclined rod (15) fits in the first limit hole (17); The second inclined bar (18), the second inclined bar (18) lower end is fixed on the second slide block (10), the second inclined bar (18) upper end is fixed with the second inclined top (19), the second inclined top ( 19) Located above the first inclined roof (16), a second limiting hole (20) is opened in the moving block (13), and the second inclined rod (18) fits in the second limiting hole (20). 2. According to claim 1, a buckle has two different angles of ejection structure, characterized in that the sliding plane of the first slider (6) is in contact with the product of the first inclined top (16) The parallelism error of the surface is 0.01mm~0.03mm. 3. According to claim 1 or 2, a buckle has two different angles of the ejection structure, characterized in that the sliding plane of the second slider (10) and the second inclined top (19) The parallelism error of the product contact surface is 0.02mm~0.03mm. 4. The buckle according to claim 1 has two different angles of mold release structure, characterized in that the angle between the axis of the first inclined bar (15) and the horizontal plane is 70°~80°, The included angle between the axis of the second oblique rod (18) and the horizontal plane is 70°-80°. 5 . The buckle has two different angles of ejection structure according to claim 1 , characterized in that, the four corners of the horizontal section of the moving block ( 13 ) are all rounded. 6. A buckle with two different angles of ejection structure according to claim 1, characterized in that, the lower end of the ejector rod (12) is provided with an inclined surface for pressing the ejector block (7). 7. The buckle according to claim 6 has two different angles of ejection structure, characterized in that the angle between the inclined surface at the lower end of the ejector rod (12) and the horizontal plane is 50°~70°. 8. The buckle with two different angles of ejection structure according to claim 1, characterized in that the contact surface of the first inclined top (16) and the second inclined top (19) is an inclined surface.