CN218415237U - Electric connector with radiator and shielding case - Google Patents

Abstract

The invention relates to the technical field of electronics, and provides an electric connector provided with a radiator and a shielding case, wherein the electric connector comprises an electric lamination, a grounding firmware and an insulating shell which is matched with the front end of the electric lamination, and the electric lamination comprises at least one signal sheet clamped between one grounding sheet and the other grounding sheet; the grounding firmware is arranged on the electric lamination and comprises a flat buckle plate, and the flat buckle plate comprises a long plate body, double holes arranged close to one long edge of the long plate body and single holes arranged close to the other long edge of the long plate body; the upper side and/or the rear side of the grounding piece are/is provided with the convex columns matched with the single holes, and the upper side and/or the rear side of the signal piece are/is provided with the convex columns matched with the double holes, so that the grounding piece is stable through the grounding firmware when clamping the signal piece.

Description

Electric connector with radiator and shielding case

Technical Field

The invention relates to the technical field of electric connectors, in particular to an electric connector provided with a radiator and a shielding case.

Background

The existing QSFP-DD dual-layer electrical connector is generally a molded signal die and a ground die, which have many problems in molding and assembling, such as: the moving and the Housing are in clearance fit around, and the clearance occupies a limited space and is not beneficial to the stability of the size (such as tolerance); the Molding is assembled with the fixing sheet hole and fixed by using a hot melting technology, so that the signal die and the grounding die are simply fixed together by the fixing sheet and cannot be contacted with the grounding terminal (PIN), and the signal die cannot form a closed electromagnetic field environment and cannot improve crosstalk.

Disclosure of Invention

To solve the above technical problems, it is a primary object of the present invention to provide an electrical connector configured with a heat sink and a shield case.

In order to achieve the purpose, the technical scheme applied by the invention is as follows:

disclosed is an electrical connector configured with a heat sink and a shield case, wherein: the electric connector comprises an electric lamination, a grounding fastener and an insulating shell which is matched with the front end of the electric lamination, wherein the electric lamination comprises at least one signal sheet which is clamped between one grounding sheet and the other grounding sheet; the grounding firmware is arranged on the electric lamination and comprises a flat buckling plate made of conductive materials and comprising a long plate body, double holes arranged close to one long edge of the long plate body and single holes arranged close to the other long edge of the long plate body, wherein the double holes are positioned on the plate body and correspond to the positions between the adjacent single holes; the upper side and/or the rear side of the grounding piece are/is provided with a convex column which is matched with a single hole, and the upper side and/or the rear side of the signal piece are/is provided with a convex column which is matched with double holes, so that the grounding piece is stable through a grounding fastener when clamping the signal piece.

In this embodiment, it is preferable that: the shape and size of the convex column of the grounding piece are the same as those of the convex column of the signal piece, wherein: the single hole is matched with the size of one convex column, and the double holes are matched with the sizes of two parallel convex columns; a slit communicating with the single hole is formed in the buckle plate member on the side of the single hole close to the double holes.

In this embodiment, it is preferable that: the grounding sheet comprises an insulating sheet and a grounding terminal which is stable on the insulating sheet, the insulating sheet is a sheet body formed by molding, and a triangular through hole is formed at the upper side of the insulating sheet close to the sheet body; the ground terminal comprises a ground terminal fixing part and a ground terminal fixing foot which are buried in the insulating sheet and a shielding surface which is communicated with the ground terminal fixing part and the ground terminal fixing foot, the ground terminal fixing part extends out of a ground terminal contact part towards the front side of the insulating sheet, and the ground terminal fixing foot extends out of a ground terminal fisheye part towards the lower side of the insulating sheet.

In this embodiment, it is preferable that: the signal sheet comprises a plastic sheet and a signal terminal which is fixed by the plastic sheet, the plastic sheet is a sheet frame formed by molding, and a triangular window which is perforated corresponding to the triangular sheet body is formed on the rear upper side close to the sheet frame; the signal terminal comprises a signal terminal fixing part and a signal terminal fixing pin which are embedded in the plastic sheet and a connecting section for communicating the signal terminal fixing part and the signal terminal fixing pin, and the connecting section is exposed in a ventilation window which is formed on the sheet frame and is opposite to the appearance of the sheet body shielding surface; the signal terminal fixing part extends out of the signal terminal contact part towards the front side of the plastic sheet; the signal terminal fixing feet extend out of fisheyes towards the lower side of the plastic sheet.

In this embodiment, it is preferable that: the grounding piece and the signal piece are respectively provided with a concave part for the adaptation of the flat buckling plate, wherein: the concave part of the grounding piece is positioned on the upper side and/or the rear side of the insulating piece, and the convex column of the grounding piece is positioned in the concave part of the grounding piece; the concave part of the signal plate is positioned at the upper side and/or the rear side of the plastic sheet relative to the concave part of the grounding plate, and the convex column of the signal plate is positioned in the concave part of the signal plate.

In this embodiment, it is preferable that: the fixing part of the grounding terminal extends outwards in the concave part of the grounding plate to form a clamping pin abutting against the convex column of the grounding plate, and the clamping pin is matched with the gap of the flat-buckling plate and is fused with the flat-buckling plate into a whole through spot welding.

In this embodiment, it is preferable that: the ground terminal contact portion includes an outer upper ground terminal contact portion and an outer lower ground terminal contact portion, and the ground terminal fixing portion includes an outer upper ground terminal fixing portion connected to the outer upper ground terminal contact portion and an outer lower ground terminal fixing portion connected to the outer lower ground terminal contact portion; the insulating sheet forms an upper extension arm covering the outer side upper ground terminal fixing portion and a lower extension arm covering the outer side lower ground terminal fixing portion on the sheet body front side.

In this embodiment, it is preferable that: the grounding firmware comprises a buckling and inserting plate piece, the buckling and inserting plate piece is formed by stamping a metal plate and comprises a basic part, a rear fork opening and a front clamping opening are formed in the basic part, and the rear fork opening is arranged in a protruding mode relative to the grounding sheet on the electric lamination along the rear side of the basic part; the front clamping opening is arranged along the front side of the basic part and is bent inwards corresponding to the rear fork opening.

In this embodiment, it is preferable that: go up extension arm and extension arm down and form the breach and at the outside of root outside protruding stuck point near the front end respectively, the breach makes by the fixed part of cladding expose, and the stuck point inwards communicates this fixed part.

In this embodiment, it is preferable that: when the buckling and inserting plate component is assembled on the electrical lamination, the front clamping opening of the buckling and inserting plate component is in fork joint with the fixing part exposed in the notch, and the rear fork opening of the buckling and inserting plate component is in fork joint with the clamping point.

Compared with the prior art, the invention has the beneficial effects that:

firstly, through the mutual matching design of the grounding firmware, the electrical lamination can be tightly combined under the condition of not changing the existing size of the product, so that defective products caused by difficulty in size control are avoided, and the yield of the product is effectively improved;

and secondly, through the design that the grounding firmware is contacted with the grounding terminal and the grounding terminal is communicated with the shielding surface, the electric lamination forms a closed electromagnetic field environment, so that the crosstalk is improved, and the product performance is well improved.

Drawings

Fig. 1 is a perspective view schematically illustrating the present embodiment.

Fig. 2 is a perspective view of another angle in the present embodiment.

Fig. 3 is a perspective view of the outer cover in the present embodiment.

Fig. 4 is a perspective view of the electrical connector assembled with the inner cover in this embodiment.

Fig. 5 is a perspective view of the electrical connector of the present embodiment.

Fig. 6 is an exploded view of the electrical connector of the present embodiment.

Fig. 7 is a perspective view of the electrical connector of the present embodiment from another perspective.

Fig. 8 is an exploded view of the electrical connector of the present embodiment from another perspective.

Fig. 9 is an exploded view of the electrical laminate of the present embodiment.

Fig. 10A is a schematic diagram of a signal sheet of the electrical laminate in this embodiment.

Fig. 10B is a schematic view of another perspective of the signal sheet of the electrical laminate in this embodiment.

Fig. 11 is an exploded view of the electrical stack of the present embodiment from another perspective.

Fig. 12A is a schematic view of a grounding plate of the electrical lamination of the present embodiment.

Fig. 12B is another view of the grounding plate of the electrical stack of the present embodiment.

Fig. 13 is a schematic view of the flat fastening plate of the grounding fastener of the present embodiment.

Fig. 14A is a schematic view of a snap-in board assembly of the ground fastener of this embodiment.

Fig. 14B is a schematic view of another perspective view of the snap-in board piece of the ground engaging fastener of this embodiment.

Detailed Description

In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product. Moreover, in the interest of brevity and understanding, only one of the components having the same structure or function is illustrated schematically or designated in some of the drawings. In this document, "one" means not only "only one" but also a case of "more than one".

It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

In the embodiments shown in the drawings, the directions such as up, down, left, right, front, and rear are used to explain the structure and movement of various components of the present invention not absolutely but relatively. These illustrations are appropriate when these components are in the positions shown in the figures. If the description of the positions of these components changes, the indication of these directions changes accordingly.

In addition, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not intended to indicate or imply relative importance.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.

In the present embodiment, as shown in fig. 1 to 8, an electrical connector with a heat sink and a shielding cover is disclosed, the electrical connector 100 includes an electrical lamination 10, a grounding fastener 20, and an insulating housing 30 fitted at the front end of the electrical lamination 10. In this example, the electrical laminate 10 includes at least one signal pad 12 sandwiched between one ground pad 11 and another ground pad 11, and preferably two signal pads 12 sandwiched between two ground pads 11, wherein: the front sides of the grounding plate 11 and the signal plate 12 are both terminal contact parts 1121 which conform to the QSFP-DD double-layer connector standard and can be accommodated in the insulating housing 30; the insulating housing 30 has a base 31, an upper tongue 32 and a lower tongue 33 protruding from the front surface (not labeled) of the base, a mounting space 34 is formed between the upper and lower tongues 32, 33, the upper and lower tongues 32, 33 have slots 321, 331 hollowed out to the rear surface (not labeled) of the base, the upper and lower tongues 32, 33 are hollowed out to the front surface of the rear surface of the base in a vertically expanded manner to form an upper receiving portion 322 communicating with the upper tongue slot 321 and a lower receiving portion 332 connecting with the lower tongue slot 331, respectively, and the upper tongue slot 321 and the lower tongue slot 331 are provided with terminal slots (not labeled) for disposing the QSFP-DD dual-layer connector terminal contact portion 1121, respectively. In this embodiment, the shield cover includes an inner cover 200 and an outer cover 300, the inner cover 200 is not limited to accommodating a heat sink and/or a light guide (not shown), but is preferably a heat sink, and the inner cover 200 is provided in the mounting space 34 through the tail of the inner cover so that the inner cover 200 is suspended in front of the electrical connector 100; the rear half of the outer housing 300 is covered outside the electrical connector 100, and the front half of the outer housing 300 is formed as upper and lower insertion spaces 301 and 302 by the inner housing 200 at an interval, the upper insertion space 301 is for inserting an external plug (not shown) into the upper tongue slot 321 and communicating with the upper terminal contact portion 1121, and the lower insertion space 302 is for inserting another external plug (not shown) into the lower tongue slot 331 and communicating with the lower terminal contact portion 1121. In this example, the heat sink 400 is secured to the housing 300 by a resilient compression element 401, wherein: elastic pressing piece 401 has parallel front and rear cross arms (not labeled) and buckles (not labeled) with holes at two ends of the front and rear cross arms respectively in a vertical mode, radiator 400 is pressed on outer cover 300 through the front and rear cross arms, two side walls (not labeled) of outer cover 300 are tightly attached through the buckles at two sides, and radiator 400 is stabilized on outer cover 300 through buckles and buckles (not labeled) on the corresponding side walls of outer cover 300.

In the present embodiment, as shown in fig. 5 to 9, 11, 12A, 12B and 13, the grounding fastener 20 is disposed on the electrical lamination 10 and includes a flat buckle plate 21, the flat buckle plate 21 is made of a conductive material and includes an elongated plate 211, a double hole 212 arranged near one long edge of the elongated plate 211 and a single hole 213 arranged near the other long edge of the elongated plate 211, the double hole 212 is located on the plate corresponding to a position between adjacent single holes 213, the single hole and the double hole are not index values but have different shapes and sizes, and a slot 214 communicating with the single hole 213 is formed on one side of the single hole near the double hole. In this embodiment, the grounding plate 11 includes an insulation sheet 111 and a grounding terminal 112 secured to the insulation sheet 111, the insulation sheet 111 is a molded sheet body 1111, and a triangular through hole 1112 is formed near the upper rear side of the sheet body; the ground terminal 112 includes a ground terminal fixing portion (not shown) and a ground terminal fixing leg (not shown) embedded in the insulating sheet 111, and a shield surface 1122 communicating the ground terminal fixing portion and the ground terminal fixing leg (and not limited to being formed of any material such as metal or conductive paint), and the ground terminal contact portion 1121 is connected to the ground terminal fixing portion and suspended on the front side of the insulating sheet 111 above the ground sheet 11; the ground terminal fixing leg extends out of the fisheye 1123, and the fisheye 1123 protrudes below the insulating sheet 111 above the ground sheet 11. A concave part (not labeled) corresponding to the width and thickness of the accommodation buckling plate 21 is formed on the upper side and/or the rear side of the grounding plate 11, a convex column (not labeled) matching with one single hole 213 on the buckling plate 21 and a clamping leg (not labeled) matching with one gap 214 communicated with the single hole 213 are protruded on the concave part, and the clamping leg is not limited to a structure that the grounding terminal fixing part extends and is exposed to the concave part. After the clamping feet are matched with the gaps 214, the grounding plate 11 and the flat buckling plate 21 are not limited to be fixed into a whole through spot welding. In this example, the ground terminal contact portion 1121 of the ground strip 11 (see fig. 12A and 12B) includes upper and lower ground terminal contact portions 1121, the insulation sheet 111 forms upper and lower extending arms (not labeled) covering the fixing portions near the upper and lower ground terminal contact portions on the upper and lower layers of the front side of the sheet body 1111, and a pin 1124 similar to a snap pin function and adapted to fit into the slit 214 of the other buckle plate member 21 is provided in a recess formed on the front side of the sheet body 1111 between the upper and lower extending arms. In this embodiment, the signal chip 12 includes a plastic sheet 121 and a signal terminal 122 secured to the plastic sheet 121, the plastic sheet 121 is a molded sheet frame 1211, and a triangular window 1212 corresponding to the triangular through hole 1112 is formed near the rear upper side of the sheet frame; the signal terminal 122 includes a signal terminal fixing portion (not shown) and a signal terminal fixing leg (not shown) embedded in the plastic sheet 121, and a connecting section 1222 for communicating the signal terminal fixing portion and the signal terminal fixing leg, wherein the connecting section 1222 is exposed in a ventilation window (not shown) formed by the sheet frame 1211 and corresponding to the outer shape of the sheet body shielding surface 1122; signal terminal contact portions 1221 are connected to the signal terminal fixing portions and suspended from the front side of plastic sheet 121 on signal sheet 12; the signal terminal fixing legs extend out of the fisheye 1223, and the fisheye 1223 protrudes below the plastic piece 121 on the signal piece 12. A concave part (not marked) corresponding to the width and thickness of the accommodating buckle plate member 21 is formed on the upper side and/or the rear side of the signal sheet 12, and a convex column 1213 matched with one double hole 212 on the buckle plate member 21 is protruded on the concave part. In this example, the signal terminal contact portions 1221 of the signal strip 12 (see fig. 10A and 10B) include upper and lower grounding terminal contact portions 1221, the plastic sheet 121 forms upper and lower extension arms (not labeled) covering the fixing portions near the upper and lower signal terminal contact portions at the upper and lower layers of the front side of the strip holder 1211, and a protruding pillar 1213 is formed in the recess at the front side of the strip holder 1211 between the upper and lower extension arms to fit the two holes 212 of the buckle plate 21. In this embodiment, when the two signal sheets 12 are assembled together, the protruding columns 1213 of the two signal sheets 12 just fill the two holes 212. When the signal lamination device is assembled, the two signal plates 12 are clamped between one grounding plate 11 and the other grounding plate 11, the 11 protruding columns of the grounding plate are matched with the single holes, the 12 protruding columns of the signal plates are matched with the double holes, in order to ensure the stability of the electrical lamination 10, the protruding columns of the single holes and the double holes are respectively arranged on the upper sides, the front sides and the rear sides of the grounding plate 11 and the signal plates 12, and the protruding columns are processed through thermal fusion, so that the grounding plate 11 and the signal plates 12 are effectively and stably integrated.

In the present embodiment, with continuing reference to fig. 5 to fig. 13 and with combined reference to fig. 14A and fig. 14B, in the electrical connector disclosed in the figures, the grounding fastener 20 is disposed on the electrical lamination 10 and further includes a buckling and inserting plate 22, the buckling and inserting plate 22 is formed by stamping a metal plate and includes a base portion 221, the base portion 221 is formed with a rear fork 222, a middle clip 223 and a front clip 224, wherein: the rear fork 222 is arranged in a protruding manner along the rear side of the base part 221 with respect to the ground plate 11; the front clipping openings 224 are arranged along the front side of the basic part 221 and are bent inwards corresponding to the rear fork openings 222; the middle clip opening 223 is an unnecessary structure, and is arranged between the front clip opening 224 and the rear fork opening 222 and is bent inwards. In this example, the assembled ground plate 11 and signal plate 12 are provided with a snap-in plate member 22 at the outside of the extension arm, wherein: the grounding plate 11 has a clamping structure 113 for the insertion and fastening piece 22 to connect firmly, the clamping structure 113 includes a notch 1131 formed on the outer side near the front end of the extension arm for exposing the fixing portion, a fastening point 1133 formed on the root of the extension arm for protruding the outer side of the extension arm, and a middle arm notch 1132 formed between the notch 1131 and the fastening point 1133 for exposing the fixing portion, when the insertion and fastening piece 22 is assembled on the electrical lamination 10, the front clip opening 224 of the insertion and fastening piece 22 is crossed with the fixing portion in the notch, the rear clip opening 222 is crossed with the fastening point 1133, and the middle clip opening 223 is crossed with the fixing portion in the middle arm notch 1132, so that each grounding plate on the electrical lamination 10 keeps effective communication.

In the foregoing embodiments, the descriptions of the respective embodiments have their respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or recited in detail in a certain embodiment.

It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.

Claims (10)

1. An electrical connector configured with a heat sink and a shield, comprising: the electric connector comprises an electric lamination, a grounding fastener and an insulating shell which is matched with the front end of the electric lamination, wherein the electric lamination comprises at least one signal sheet which is clamped between one grounding sheet and the other grounding sheet; the grounding firmware is arranged on the electric lamination and comprises a flat buckling plate made of conductive materials and comprising a long plate body, double holes arranged close to one long edge of the long plate body and single holes arranged close to the other long edge of the long plate body, wherein the double holes are positioned on the plate body and correspond to the positions between the adjacent single holes; the upper side and/or the rear side of the grounding piece are/is provided with a convex column which is matched with a single hole, and the upper side and/or the rear side of the signal piece are/is provided with a convex column which is matched with double holes, so that the grounding piece is stable through a grounding fastener when clamping the signal piece.

2. The electrical connector configured as a heat sink and shield as recited in claim 1, wherein: the shape and size of the convex column of the grounding piece are the same as those of the convex column of the signal piece, wherein: the single hole is matched with the size of one convex column, and the double holes are matched with the sizes of two parallel convex columns; a slit communicating with the single hole is formed in the buckle plate member on the side of the single hole close to the double holes.

3. The electrical connector configured as a heat sink and shield as recited in claim 2, wherein: the grounding sheet comprises an insulating sheet and a grounding terminal which is stable on the insulating sheet, the insulating sheet is a sheet body formed by molding, and a triangular through hole is formed at the upper side of the insulating sheet close to the sheet body; the ground terminal comprises a ground terminal fixing part and a ground terminal fixing foot which are buried in the insulating sheet and a shielding surface which is communicated with the ground terminal fixing part and the ground terminal fixing foot, the ground terminal fixing part extends out of a ground terminal contact part towards the front side of the insulating sheet, and the ground terminal fixing foot extends out of a ground terminal fisheye part towards the lower side of the insulating sheet.

4. The electrical connector configured as a heat sink and shield as recited in claim 3, wherein: the signal sheet comprises a plastic sheet and a signal terminal which is formed by the plastic sheet firmly, the plastic sheet is a sheet frame formed by molding, and a triangular window which is opposite to the triangular through hole of the sheet body is formed on the rear upper side close to the sheet frame; the signal terminal comprises a signal terminal fixing part and a signal terminal fixing pin which are embedded in the plastic sheet and a connecting section for communicating the signal terminal fixing part and the signal terminal fixing pin, and the connecting section is exposed in a ventilation window which is formed on the sheet frame and is opposite to the shape of the sheet body shielding surface; the signal terminal fixing part extends out of the signal terminal contact part towards the front side of the plastic sheet; the signal terminal fixing feet extend out of fisheyes towards the lower side of the plastic sheet.

5. The electrical connector configured as a heat sink and shield as recited in claim 4, wherein: the grounding piece and the signal piece are respectively provided with a concave part for the adaptation of the flat buckling plate, wherein: the concave part of the grounding piece is positioned on the upper side and/or the rear side of the insulating piece, and the convex column of the grounding piece is positioned in the concave part of the grounding piece; the concave part of the signal plate is positioned at the upper side and/or the rear side of the plastic sheet relative to the concave part of the grounding plate, and the convex column of the signal plate is positioned in the concave part of the signal plate.

6. The electrical connector configured as a heat sink and shield as recited in claim 5, wherein: the fixing part of the grounding terminal extends outwards in the concave part of the grounding piece to form a clamping pin abutting against the convex column of the grounding piece, and the clamping pin is matched with the gap of the flat buckling plate and is fused with the flat buckling plate into a whole through spot welding.

7. The electrical connector configured as a heat sink and shield as recited in claim 6, wherein: the ground terminal contact part comprises an outer upper ground terminal contact part and an outer lower ground terminal contact part, and the ground terminal fixing part comprises an outer upper ground terminal fixing part connected with the outer upper ground terminal contact part and an outer lower ground terminal fixing part connected with the outer lower ground terminal contact part; the insulating sheet forms an upper extension arm covering the outer side upper ground terminal fixing portion and a lower extension arm covering the outer side lower ground terminal fixing portion on the sheet body front side.

8. The electrical connector configured as a heat sink and shield as recited in claim 7, wherein: the grounding firmware comprises a buckling and inserting plate piece, the buckling and inserting plate piece is formed by stamping a metal plate and comprises a basic part, a rear fork opening and a front clamping opening are formed in the basic part, and the rear fork opening is arranged in a protruding mode relative to the grounding sheet on the electric lamination along the rear side of the basic part; the front clamping opening is arranged along the front side of the basic part and is bent inwards corresponding to the rear fork opening.

9. The electrical connector configured as a heat sink and shield as recited in claim 8, wherein: go up extension arm and extension arm down and form the breach and at the outside of root outside protruding stuck point near the front end respectively, the breach makes by the fixed part of cladding expose, and the stuck point inwards communicates this fixed part.

10. The electrical connector configured as a heat sink and shield as recited in claim 9, wherein: when the buckling and inserting plate component is assembled on the electrical lamination, the front clamping opening of the buckling and inserting plate component is in fork joint with the fixing part exposed in the notch, and the rear fork opening of the buckling and inserting plate component is in fork joint with the clamping point.

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