CN218481547U

CN218481547U - Connector detection instrument

Info

Publication number: CN218481547U
Application number: CN202222064456.7U
Authority: CN
Inventors: 朱银城; 毛航; 于中海; 苏连科
Original assignee: Kunshan Luxshare Precision Industry Co Ltd
Current assignee: Huiju Intelligent Technology Kunshan Co ltd
Priority date: 2022-08-05
Filing date: 2022-08-05
Publication date: 2023-02-14
Anticipated expiration: 2032-08-05
Also published as: TWM651357U

Abstract

The application relates to a connector detection instrument, including: a base assembly; the test carrier seat assembly comprises a test platform structure, a mounting seat structure and a pressing structure, wherein the test platform structure is arranged on the base assembly and is provided with an accommodating space, one side of the test platform structure, which is far away from the base assembly, is provided with an opening of the accommodating space, the mounting seat structure is positioned in the accommodating space, the connector is arranged on the mounting seat structure, and the pressing structure is arranged on the test platform structure; the grabbing component is arranged on the base component; the test assembly comprises a control structure and a test structure, the test structure is electrically connected with the control structure, and the test structure is arranged in the accommodating space. The technical scheme of this application has solved the problem of defective products as the yields when the connector among the prior art detects effectively.

Description

Connector detection instrument

Technical Field

The application relates to the technical field of connector detection, in particular to a connector detection instrument.

Background

Medical connectors are one type of electronic connector that is often used to connect electronic components and the connector needs to be tested before shipping. At present, the connector manufacturing industry requires 100% electrical testing, especially 100% functional testing for smaller products, and since full-automatic testing of products and terminal structures cannot be achieved, the products can only be placed into a test carrier by an operator.

This causes a problem that an operator erroneously operates to cause a defective product or an untested product flows into the next station.

SUMMERY OF THE UTILITY MODEL

The application provides a connector detecting instrument to the problem of defective products as the yields when the connector among the solution prior art detects.

According to the present application, there is provided a connector inspection apparatus comprising: a base assembly; the test carrier seat assembly comprises a test platform structure, a mounting seat structure and a pressing structure, wherein the test platform structure is arranged on the base assembly and is provided with an accommodating space, one side of the test platform structure, which is far away from the base assembly, is provided with an opening of the accommodating space, the mounting seat structure is positioned in the accommodating space, the connector is arranged on the mounting seat structure, and the pressing structure is arranged on the test platform structure; the grabbing component is arranged on the base component; the test assembly comprises a control structure and a test structure, the test structure is electrically connected with the control structure, and the test structure is arranged in the accommodating space; wherein, the control structure is connected with the grabbing component so as to control the grabbing component to grab the connector.

Further, the mounting seat structure comprises a mounting rod and a first elastic piece, the mounting rod is provided with a limiting through hole perpendicular to the axis of the mounting rod, the limiting through hole extends along the axis of the mounting rod, and the first elastic piece is located between the testing platform structure and the mounting rod.

Further, the test platform structure includes bottom plate, casing and gag lever post, and first elastic component supports presses between the first end of bottom plate and installation pole, and the gag lever post is at least partly worn to establish in spacing through-hole and fix on the casing.

Furthermore, the abutting structure comprises an abutting seat, an abutting rod and a second elastic piece, the abutting seat is fixed on the surface of the testing platform structure far away from the base assembly, the abutting rod is rotatably arranged on the abutting seat, the first end of the second elastic piece is fixedly connected with the abutting seat, and the second end of the elastic piece is connected with the first end of the abutting rod.

Furthermore, the connector detection instrument further comprises a first driving structure, a sliding rail structure which is matched with each other is arranged between the base component and the test carrier component, the sliding rail structure extends along the length direction of the base component, and the first driving structure is connected with the test platform structure to drive the test platform structure to move along the sliding rail structure.

Further, connector detecting instrument still including snatching the subassembly, snatchs the subassembly and includes portal frame, horizontal walking structure, vertical walking structure and clamping jaw structure, and the portal frame sets up along base subassembly's width direction, and horizontal walking structure sets up at the portal frame, and vertical walking structure sets up on horizontal walking structure, and clamping jaw structure sets up on vertical walking structure.

Furthermore, the connector detecting instrument further comprises an abutting structure, the abutting structure comprises an abutting mounting frame and an abutting rod, the abutting mounting frame is arranged on the base assembly, the abutting rod is mounted on the abutting mounting frame, the abutting structure moves to a preset position towards the portal frame, and the abutting rod can abut against the second end of the abutting rod so that the abutting rod can avoid the opening of the accommodating space.

Further, connector detecting instrument still includes the guard plate, and the guard plate setting is on base component, and the guard plate has the passageway that supplies the test to carry a seat subassembly to pass through, and the mount pad structure has the position of snatching that is located the inboard of guard plate, and is located the detection position in the outside of guard plate.

Further, control structure includes control main part, display panel and on-off controller, and control main part and display panel all set up on base subassembly, and control main part and display panel all set up the one side of keeping away from the guard plate at the portal frame, and on-off controller sets up the outside at the guard plate.

Further, the connector detection instrument further comprises a placing container which is arranged on the inner side of the protection plate and is located on the lower portion of the clamping jaw structure.

Use the technical scheme of this application, the connector is placed on the mount pad structure, supports to press the structure to support the connector and press in the accommodation space of test platform structure, and test structure tests the connector, and test structure is connected with the control structure electricity. When the test structure detects that the connector is the defective products, the control structure controls to support the opening that the structure avoids the accommodation space, snatchs the subassembly and snatchs the connector, can avoid the defective products to sneak into the non-defective products like this effectively. The technical scheme of this application is the problem of defective products when having avoided the connector among the prior art to detect effectively as the yields.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and, together with the description, serve to explain the principles of the application.

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.

FIG. 1 shows a perspective view of an embodiment of a connector testing apparatus of the present application;

FIG. 2 shows a perspective view of another angle of the connector testing instrument of FIG. 1;

FIG. 3 shows a schematic view of the internal structure of the connector testing apparatus of FIG. 1;

fig. 4 shows a partially enlarged schematic view of fig. 3.

Wherein the figures include the following reference numerals:

10. a base assembly; 11. a slide rail structure; 20. testing the carrier assembly; 21. testing the platform structure; 211. a base plate; 212. a housing; 213. a limiting rod; 22. a mounting base structure; 221. mounting a rod; 222. a limiting through hole; 23. a pressing structure; 231. a pressing seat; 232. a pressing rod is abutted; 30. grabbing the assembly; 31. a gantry; 32. a transverse walking structure; 33. a vertical walking structure; 34. a jaw structure; 40. testing the component; 41. a control structure; 411. a control body; 412. a display panel; 413. a switch controller; 42. testing the structure; 421. a probe; 422. an inductor probe; 50. a propping structure; 51. supporting against the mounting frame; 52. abutting the ejector rod; 60. a protection plate; 70. placing a container; 100. a connector.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

For ease of description, spatially relative terms such as "over 8230," "upper surface," "above," and the like may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary terms "at 8230; \8230; 'above" may include both orientations "at 8230; \8230;' above 8230; 'at 8230;' below 8230;" above ". The device may also be oriented 90 degrees or at other orientations and the spatially relative descriptors used herein interpreted accordingly.

As shown in fig. 1 to 4, the connector inspection instrument of the present embodiment includes: base component 10, seat component 20 is carried in the test, snatch subassembly 30 and test component 40, seat component 20 is carried in the test includes test platform structure 21, mount pad structure 22 and support and press structure 23, test platform structure 21 sets up on base component 10, test platform structure 21 has accommodation space, one side that base component 10 was kept away from to test platform structure 21 has accommodation space's opening, mount pad structure 22 is located accommodation space, connector 100 installs on mount pad structure 22, support and press structure 23 to set up on test platform structure 21, it has the natural state of shutoff accommodation space's opening part to support and press structure 23, perhaps avoid accommodation space's open-ended getting and putting the state. The gripper assembly 30 is disposed on the base assembly 10. The test assembly 40 includes a control structure 41 and a test structure 42, the test structure 42 is electrically connected to the control structure 41, and the test structure 42 is disposed in the accommodating space. Wherein control structure 41 is coupled to grasping assembly 30 to control grasping assembly 30 to grasp connector 100.

By applying the technical solution of this embodiment, the connector 100 is placed on the mounting base structure 22, the abutting structure abuts the connector 100 in the accommodating space of the testing platform structure, the testing structure tests the connector 100, and the testing structure is electrically connected to the control structure. When the testing structure detects that the connector 100 is a defective product, the control structure controls the abutting structure to avoid the opening of the accommodating space, and the grabbing component grabs the connector 100, so that the defective product can be effectively prevented from being mixed into the defective product. The technical scheme of this embodiment has avoided the problem that the defective products was regarded as the yields when connector 100 among the prior art detected effectively.

It should be noted that the test structure 42 includes a probe 421 and an inductor probe 422, when the connector 100 is placed in the accommodating space, the pressing rod 232 is in a natural state to press the connector 100, the probe 421 is connected to a conductor in the connector 100, the inductor probe 422 is located outside the connector 100, and the switch controller 413 is turned on to test the connector 100.

As shown in fig. 3 and 4, in the solution of the present embodiment, the mounting seat structure 22 includes a mounting rod 221 and a first elastic member, the mounting rod 221 has a limiting through hole 222 perpendicular to the axis of the mounting rod 221, the limiting through hole 222 extends along the axis of the mounting rod 221, and the first elastic member is located between the testing platform structure 21 and the mounting rod 221. The arrangement of the limiting through hole 222 enables the mounting seat structure to be more compact, and the structure can also ensure that the mounting seat structure 22 moves more stably, so that the occurrence of a blocking condition is avoided. It should be noted that, at least part of the accommodating space of the test platform structure is adapted to the mounting rod 221, so that the wall of the accommodating space can also limit the mounting rod 221, and the limiting through hole 222 can limit the mounting rod 221 in the axial direction, thereby ensuring that the mounting rod 221 does not fall out of the accommodating space. The first elastic member is a spring, and the installation of the connector 100 is achieved by compression deformation of the spring.

As shown in fig. 1, 3 and 4, in the technical solution of the present embodiment, the testing platform structure 21 includes a bottom plate 211, a housing 212 and a limiting rod 213, the first elastic member is pressed between the bottom plate 211 and the first end of the mounting rod 221, and the limiting rod 213 at least partially penetrates through the limiting through hole 222 and is fixed on the housing 212. The structure is compact, and the processing cost is low. Specifically, the limiting rod 213 is inserted into the limiting through hole 222, and two ends of the limiting rod 213 are fixed on the housing 212, in the technical solution of this embodiment, the limiting rod 213 is connected to the main body of the housing 212 through two connecting blocks by a fastener. The cross section of the limiting rod 213 is circular, and the cross section of the limiting rod 213 can also be rectangular, so that the installation rod 221 can be prevented from rotating around the limiting rod 213.

As shown in fig. 4, in the solution of the present embodiment, the second end of the mounting rod 221 is mounted with a connector. The cross-section of the second end of the mounting rod 221 is circular, except for the position of the mounting rod 221 where the connector is mounted, the cross-section of the remaining mounting rod 221 is circular arc-shaped, that is, the side of the mounting rod 221 facing the sensor probe 422 is a plane like a circular rod with a partial circular arc cut off along the axis.

As shown in fig. 1 and fig. 4, in the technical solution of the present embodiment, the pressing structure 23 includes a pressing seat 231, a pressing rod 232, and a second elastic member, the pressing seat 231 is fixed on the surface of the testing platform structure 21 away from the base assembly 10, the pressing rod 232 is rotatably disposed on the pressing seat 231, a first end of the second elastic member is fixedly connected with the pressing seat 231, and a second end of the second elastic member is connected with a first end of the pressing rod 232. The second elastic member may be a spring or a torsion spring, and applies an acting force to the second end of the pressing rod 232, and the pressing rod 232 overcomes the elasticity of the second elastic member to rotate under the action of an external force, i.e., the natural state of the opening of the accommodating space is blocked, or the taking and placing state of the opening of the accommodating space is avoided.

As shown in fig. 4, the second elastic member applies an elastic force to the first end of the pressing rod 232, so that the first end of the pressing rod 232 is located at the upper portion of the accommodating space. When the connector 100 is located in the accommodating space, the first end of the pressing rod 232 presses the connector 100. The rotation of the pressing rod 232 is realized through the operation of the pressing rod 232, so that the pressing rod 232 rotates between a natural state or a pick-and-place state. A rotation space is provided between the pressing base 231 and the testing platform structure 21 for the pressing rod 232 to rotate. The pressing rod 232 has a guide part

As shown in fig. 3, in the technical solution of this embodiment, the connector testing apparatus further includes a first driving structure, a sliding rail structure 11 is disposed between the base component 10 and the test carrier component 20, the sliding rail structure 11 extends along the length direction of the base component 10, and the first driving structure is connected to the test platform structure 21 to drive the test platform structure 21 to move along the sliding rail structure 11. The above structure further avoids mixing of defective products and non-defective products, for example, when the connector 100 is detected as a defective product, the first driving structure drives the test carrier assembly 20 to move to the inner side along the sliding rail structure 11 to take out the defective product; when the connector 100 is detected as good, the good connector 100 can be directly taken out by manual operation. With the above structure, the mixing of good and bad products of the connector 100 can be avoided in combination with the operation method. The length direction is a direction from the control structure 41 to the control structure 41, the side close to the control structure 41 is the inner side, and the first driving structure is a pneumatic structure.

As shown in fig. 1, in the technical solution of this embodiment, the grasping assembly 30 includes a gantry 31, a transverse traveling structure 32, a vertical traveling structure 33, and a clamping jaw structure 34, the gantry 31 is disposed along the width direction of the base assembly 10, the transverse traveling structure 32 is disposed on the gantry 31, the vertical traveling structure 33 is disposed on the transverse traveling structure 32, and the clamping jaw structure 34 is disposed on the vertical traveling structure 33. The grasping assembly 30 can move in multiple directions, and ensures the taking and placing of the defective connector 100.

Specifically, when detecting as the defective products, first drive structure drive test carrier seat subassembly 20 inward movement, after the motion targets in place, support structure 50 and support the pressure to the second end of pressure bar 232, make pressure bar 232 rotate, clamping jaw structure 34 moves down under the effect of the vertical running structure 33 of drive of second drive structure, clamping jaw structure 34 moves the back that targets in place, clamping jaw structure 34 snatchs the connector 100 of defective products, snatch back clamping jaw structure 34 and upwards move under the effect of second drive structure, then horizontal migration is carried out to horizontal running structure 32 of third drive structure drive, move to the top of placing container 70, put down the connector 100 of defective products. It should be noted that the first driving structure, the second driving structure and the third driving structure of the present embodiment are all pneumatic structures, and the three driving structures and the rear supporting rod 52 share the pneumatic structure, so that the cost can be saved.

As shown in fig. 1 and fig. 3, in the technical solution of this embodiment, the connector detecting instrument further includes a supporting structure 50, the supporting structure 50 includes a supporting mounting frame 51 and a supporting rod 52, the supporting mounting frame 51 is disposed on the base assembly 10, the supporting rod 52 is mounted on the supporting mounting frame 51, the supporting structure 23 moves to a predetermined position toward the gantry 31, and the supporting rod 52 can support the second end of the supporting rod 232, so that the supporting rod 232 avoids the opening of the accommodating space. The structure touches the abutting rod 232 through the abutting rod 52, so that the time of manual operation is saved, and the accuracy of operation is improved.

As shown in fig. 1 and 2, in the present embodiment, the connector testing apparatus further includes a shielding plate 60, the shielding plate 60 is disposed on the base assembly 10, the shielding plate 60 has a passage for the test socket assembly to pass through, and the mounting structure 22 has a grasping position at an inner side of the shielding plate 60 and a testing position at an outer side of the shielding plate 60. The protection plate 60 is provided to protect the components or the connector 100 inside the protection plate 60. The protection plate 60 is an acrylic plate.

As shown in fig. 1 to 3, in the technical solution of the present embodiment, the control structure 41 includes a control main body 411, a display panel 412 and a switch controller 413, the control main body 411 and the display panel 412 are both disposed on the base assembly 10, the control main body 411 and the display panel 412 are both disposed on a side of the gantry 31 far away from the shielding plate 60, and the switch controller 413 is disposed on an outer side of the shielding plate 60. The setting position of the switch controller 413 is easy to operate, and the setting of the display panel 412 improves the degree of visualization. It should be noted that, this embodiment also includes an alarm.

As shown in fig. 1 and 2, in the solution of the present embodiment, the connector inspection apparatus further includes a placement container 70, and the placement container 70 is disposed inside the protection plate 60 and below the jaw structure 34. The arrangement of the placing container 70 can realize effective collection of defective products, so that the defective products and the defective products can be better separated.

From the above, the operation process is as follows: firstly, putting a product (connector 100) into a detection instrument, if the product is not directly taken out without testing (a test starting button is not pressed), an NG buzzer (alarm) of a machine table can give an alarm, the number of defective products is not recorded under the condition, but 'untested' can be displayed on a human-computer interface (a display panel 412), and at the moment, an alarm reset button needs to be manually pressed, so that an operator is prevented from flowing the untested product into the next stage; when no product is placed in the inspection instrument, the sensor probe 422 does not sense the product, and if the start test button is pressed, the display panel 412 will display the product not placed, and the test program will not be started. After the testing machine finishes the test, if the product test is OK, the pressing rod 232 can be manually shifted, and the product which meets the requirement can be manually taken away after the product is ejected out. If the product NG, the alarm reports to the police, and first drive structure (cylinder) drives test carrier subassembly 20 and moves to the inboard of guard plate 60 after simultaneously (transparent ya keli baffle can play the safety protection effect and do not influence the sight simultaneously). Next, the second driving structure drives the vertical traveling structure 33, the vertical traveling structure 33 drives the clamping jaw structure 34 to move downwards, the clamping jaw structure 34 clamps and takes the product, then the clamping jaw structure 34 moves upwards, the transverse traveling structure 32 drives the whole body to move rightwards to the upper surface of the defective product box, then the clamping jaw structure 34 loosens the product, the product falls into the defective product box (the placing container 70), and then the transverse traveling structure 32 moves leftwards to reset.

According to the technical scheme, the defective products are automatically grabbed to the defective product boxes, the defective products can be safely and effectively and automatically eliminated, the defective product turnover boxes can be prevented from being manually placed in the defective product misoperation, products which are not tested flow into the next process, and then the defective products can be safely and automatically eliminated.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A connector testing apparatus, comprising:

a base assembly (10);

the test carrier seat assembly (20), the test carrier seat assembly (20) comprises a test platform structure (21), a mounting seat structure (22) and a pressing structure (23), the test platform structure (21) is arranged on the base assembly (10), the test platform structure (21) is provided with an accommodating space, one side, away from the base assembly (10), of the test platform structure (21) is provided with an opening of the accommodating space, the mounting seat structure (22) is located in the accommodating space, the connector (100) is arranged on the mounting seat structure (22), and the pressing structure (23) is arranged on the test platform structure (21);

a grasping assembly (30), the grasping assembly (30) being disposed on the base assembly (10);

a test assembly (40), the test assembly (40) comprising a control structure (41) and a test structure (42), the test structure (42) being electrically connected to the control structure (41), the test structure (42) being arranged within the accommodation space; wherein

The control structure (41) is connected with the grabbing component (30) so as to control the grabbing component (30) to grab the connector (100).

2. Connector testing apparatus according to claim 1, wherein the mounting seat structure (22) comprises a mounting rod (221) and a first resilient member, the mounting rod (221) having a limiting through hole (222) perpendicular to an axis of the mounting rod (221), the limiting through hole (222) extending along the axis of the mounting rod (221), the first resilient member being located between the test platform structure (21) and the mounting rod (221).

3. The connector testing apparatus according to claim 2, wherein the testing platform structure (21) includes a bottom plate (211), a housing (212), and a limiting rod (213), the first elastic member is pressed between the bottom plate (211) and the first end of the mounting rod (221), and the limiting rod (213) at least partially penetrates through the limiting through hole (222) and is fixed on the housing (212).

4. The connector testing apparatus according to any one of claims 1 to 3, wherein the abutting structure (23) includes an abutting seat (231), an abutting rod (232), and a second elastic member, the abutting seat (231) is fixed on the surface of the testing platform structure (21) away from the base assembly (10), the abutting rod (232) is rotatably disposed on the abutting seat (231), a first end of the second elastic member is fixedly connected to the abutting seat (231), and a second end of the elastic member is connected to a first end of the abutting rod (232).

5. The connector testing apparatus according to claim 4, further comprising a first driving structure, wherein a sliding rail structure (11) is disposed between the base assembly (10) and the test carrier assembly (20), the sliding rail structure (11) extends along a length direction of the base assembly (10), and the first driving structure is connected to the test platform structure (21) to drive the test platform structure (21) to move along the sliding rail structure (11).

6. The connector inspection instrument according to claim 5, wherein the grabbing assembly (30) comprises a gantry (31), a transverse walking structure (32), a vertical walking structure (33) and a clamping jaw structure (34), the gantry (31) is arranged along the width direction of the base assembly (10), the transverse walking structure (32) is arranged on the gantry (31), the vertical walking structure (33) is arranged on the transverse walking structure (32), and the clamping jaw structure (34) is arranged on the vertical walking structure (33).

7. The connector testing instrument according to claim 6, further comprising an abutting structure (50), wherein the abutting structure (50) comprises an abutting mounting frame (51) and an abutting rod (52), the abutting mounting frame (51) is disposed on the base assembly (10), the abutting rod (52) is mounted on the abutting mounting frame (51), the abutting structure (23) moves to a predetermined position towards the gantry (31), and the abutting rod (52) can abut against a second end of the abutting rod (232) so that the abutting rod (232) avoids the opening of the accommodating space.

8. The connector testing apparatus of claim 6, further comprising a shield plate (60), the shield plate (60) being disposed on the base assembly (10), the shield plate (60) having a passage for the test carrier assembly (20) to pass through, the mount structure (22) having a gripping position located on an inner side of the shield plate (60) and a testing position located on an outer side of the shield plate (60).

9. Connector testing instrument according to claim 8, characterized in that said control structure (41) comprises a control body (411), a display panel (412) and a switch controller (413), said control body (411) and said display panel (412) being arranged on said base assembly (10), said control body (411) and said display panel (412) being arranged on a side of said gantry (31) remote from said shielding plate (60), said switch controller (413) being arranged on an outer side of said shielding plate (60).

10. Connector testing instrument according to claim 8, characterized in that it further comprises a placement receptacle (70), said placement receptacle (70) being arranged inside said protection plate (60) and being located at a lower portion of said jaw structure (34).