Fool-proof device

Abstract

The fool-proof device comprises a first fool-proof assembly, the first fool-proof assembly comprises a first connecting seat, a first connecting rod and a first pin shaft, the first connecting seat is provided with a first through hole, the first through hole is arranged along a second direction, and the second direction is perpendicular to the first direction; the first connecting rod is movably connected to the first connecting base in the first direction, and the first connecting rod is matched with the first hole; a first clamping groove is formed in one side of the first connecting rod in the radial direction. The second fool-proof assembly comprises a second connecting base, a movable rod assembly and a second pin shaft, the second connecting base is provided with a second through hole, the second through hole is formed in the second direction, and the movable rod assembly comprises a second connecting rod and a connecting sleeve; the connecting sleeve matches the first hole. By means of the fool-proof device, the two transverse rods, namely the first transverse rod and the second transverse rod, which are similar in appearance on the frame body can be effectively distinguished, so that the accuracy during follow-up assembly is ensured, and the production efficiency can be effectively improved while the qualified rate of products is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of anti-fooling for holes, and in particular to an anti-fooling device. Background Art

[0002] During the production and processing of an oven rack, the rack body needs to be processed. Specifically, the rack body has two cross bars. The outer shapes and dimensions of the two cross bars are the same. The only difference is that the shapes of the holes at the ends of the two cross bars are different. During assembly, it is necessary to ensure that the installation positions of the cross bars are correct, that is, it is necessary to effectively distinguish the two cross bars.

[0003] However, since the shapes and dimensions of the holes on the two cross bars are relatively close, when the operator assembles the rack body, it is easy to install them incorrectly, which affects the subsequent processing of the product, reduces the qualified rate, and requires rework, thereby reducing the production efficiency. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the deficiencies in the prior art and provide an anti-fooling device that can distinguish the two cross bars during the assembly process, thereby ensuring the accuracy of subsequent assembly, improving the qualified rate of products, and effectively improving the production efficiency at the same time.

[0005] To solve the above technical problem, the present invention provides an anti-fooling device for anti-fooling during the processing of a rack body. The rack body includes a first cross bar and a second cross bar arranged along a first direction. One end of the first cross bar has a first hole; one end of the second cross bar has a second hole, and the projected area of the first hole is larger than the projected area of the second hole. The anti-fooling device includes, A first anti-fooling component, which includes a first connection seat, a first connecting rod, and a first pin shaft. The first connection seat is provided with a first through hole, and the first through hole is arranged along a second direction perpendicular to the first direction; the first connecting rod is movably connected to the first connection seat along the first direction, and the first connecting rod matches the first hole; a first card slot is arranged radially on one side of the first connecting rod. When the first card slot overlaps with the first through hole in the second direction, the first pin shaft is clamped with the first card slot through the first through hole; A second anti-fooling component, which includes a second connection seat, a movable rod component, and a second pin shaft. The second connection seat is provided with a second through hole, and the second through hole is arranged along the second direction. The movable rod component includes a second connecting rod and a connecting sleeve. The connecting sleeve is movably sleeved on the second connecting rod, and the second connecting rod matches the second hole; the connecting sleeve matches the first hole; a second card slot is arranged on the second connecting rod, and a third card slot is arranged on the connecting sleeve. When the second card slot overlaps with the third card slot, the second pin shaft is clamped with the second card slot through the second through hole.

[0006] In an embodiment of the present invention, the projection of the first hole along the axial direction is oval, and the projection of the second hole along the axial direction is circular.

[0007] In an embodiment of the present invention, the first connecting seat is further provided with a third through hole, the third through hole is arranged along the first direction, the first connecting rod is movably arranged in the third through hole, and when the first pin shaft is clamped with the first clamping groove, the end of the first connecting rod is received in the third through hole.

[0008] In an embodiment of the present invention, the second connecting seat is further provided with a fourth through hole, the fourth through hole is arranged along the first direction, the movable rod assembly is movably arranged in the fourth through hole, and when the second pin shaft is clamped in the second clamping groove, the end of the second connecting rod is received in the fourth through hole.

[0009] In an embodiment of the present invention, the second anti-fooling component further includes a connecting column. One end of the second connecting rod is recessed axially to form a receiving space. The second connecting rod is further provided with a fifth through hole opposite to each other, and the fifth through hole extends along the axial direction of the second connecting rod; the connecting sleeve is provided with a sixth through hole opposite to each other, and the sixth through hole and the fifth through hole overlap in part in the projection along the radial direction of the second connecting rod; both ends of the connecting column are connected to the connecting sleeve through the sixth through hole respectively, and driven by the connecting sleeve, the connecting column can move in the fifth through hole.

[0010] In an embodiment of the present invention, it further includes a frame; the frame body, the first anti-fooling component and the second anti-fooling component are assembled on the frame; two sets of the first anti-fooling components are provided, and are respectively arranged at both ends of the first cross bar; two sets of the second anti-fooling components are provided, and are respectively arranged at both ends of the second cross bar.

[0011] In an embodiment of the present invention, the frame includes a first cross beam and a second cross beam arranged oppositely, and a third cross beam and a fourth cross beam arranged oppositely. The first cross beam, the second cross beam, the third cross beam and the fourth cross beam are connected end to end in sequence, and the third cross beam and the fourth cross beam extend along the first direction.

[0012] In an embodiment of the present invention, it further includes a first extension rod and a second extension rod. The first extension rod is butted against the first connecting rod and can move synchronously with the first connecting rod; the second extension rod is butted against the second connecting rod and can move synchronously with the second connecting rod; when the first anti-fooling component is assembled in the first hole, the first extension rod is received in the frame, and when the second anti-fooling component is assembled in the second hole, the second extension rod is received in the frame.

[0013] In one embodiment of the present invention, the first anti-fooling component further includes a first mounting seat, which is arranged in parallel with the first connecting seat, and the first mounting seat is provided with a first avoidance hole for the first connecting rod to pass through.

[0014] In one embodiment of the present invention, the second anti-fooling component further includes a second mounting seat, which is arranged in parallel with the second connecting seat, and the second mounting seat is provided with a second avoidance hole for the second connecting rod to pass through.

[0015] The above technical solution of the present invention has the following advantages compared with the prior art: The anti-fooling device of the present invention is provided with a first anti-fooling component and a second anti-fooling component. The first anti-fooling component can be matched with the first hole on the first cross bar, so that the first hole can be effectively identified through the first anti-fooling component. When the first anti-fooling component can be assembled at the end of the cross bar, it indicates that the cross bar is the first cross bar; otherwise, it indicates that the cross bar is the second cross bar. Correspondingly, the second anti-fooling component can be matched with the second hole on the second cross bar, so that the second hole can be effectively identified through the second anti-fooling component. When the second anti-fooling component can be assembled at the end of the cross bar, it indicates that the cross bar is the second cross bar; otherwise, it indicates that the cross bar is the first cross bar. By using the anti-fooling device of the present invention, two cross bars with similar shapes on the frame body, namely the first cross bar and the second cross bar, can be effectively distinguished, thereby ensuring the accuracy during subsequent assembly. While improving the qualified rate of products, it can also effectively improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the content of the present invention easier to be clearly understood, the following further details the present invention according to the specific embodiments of the present invention in conjunction with the accompanying drawings, wherein.

[0017] Figure 1 is the overall structural schematic diagram of the anti-fooling device in the preferred embodiment of the present invention.

[0018] Figure 2 is the structural schematic diagram of the frame body in the preferred embodiment of the present invention.

[0019] Figure 3 is the structural schematic diagram of the first cross bar in the preferred embodiment of the present invention.

[0020] Figure 4 is the structural schematic diagram of the second cross bar in the preferred embodiment of the present invention.

[0021] Figure 5 is the structural schematic diagram of the cooperation between the first cross bar and the first anti-fooling component in the preferred embodiment of the present invention.

[0022] Figure 6 isFigure 5 Partial structural schematic diagram.

[0023] Figure 7 It is a top view structural schematic diagram of the first anti-fooling component of the preferred embodiment of the present invention.

[0024] Figure 8 It is a sectional structural schematic diagram of the first anti-fooling component of the preferred embodiment of the present invention.

[0025] Figure 9 It is a structural schematic diagram of the cooperation between the second crossbar and the second anti-fooling component of the preferred embodiment of the present invention.

[0026] Figure 10 It is a first perspective schematic diagram of the second anti-fooling component of the preferred embodiment of the present invention.

[0027] Figure 11 It is a second perspective schematic diagram of the second anti-fooling component of the preferred embodiment of the present invention.

[0028] Figure 12 It is a third perspective schematic diagram of the second anti-fooling component of the preferred embodiment of the present invention.

[0029] Figure 13 It is Figure 12 A-A sectional schematic diagram of

[0030] Figure 14 It is a fourth perspective schematic diagram of the second anti-fooling component of the preferred embodiment of the present invention.

[0031] Figure 15 It is Figure 14 E-E sectional schematic diagram of

[0032] Explanation of reference numerals in the drawings of the specification: 1. Frame body; 11. First crossbar; 110. First hole; 111. First groove; 12. Second crossbar; 120. Second hole; 121. Second groove; 13. Connecting rod; 2. First anti-fooling component; 20. First connecting seat; 201. First through hole; 202. Third through hole; 21. First connecting rod; 210. First card slot; 22. First pin shaft; 3. Second anti-fooling component; 30. Second connecting seat; 301. Second through hole; 302. Fourth through hole; 31. Second pin shaft; 32. Second connecting rod; 320. Second card slot; 321. Receiving space; 322. Fifth through hole; 33. Connecting sleeve; 330. Third card slot; 331. Sixth through hole; 34. Connecting column; 35. Second mounting seat; 4. Frame; 41. First cross beam; 42. Second cross beam; 43. Third cross beam; 44. Fourth cross beam; 51. First extension rod; 52. Second extension rod. Detailed implementation manners

[0033] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and be able to implement it, but the embodiments cited do not limit the present invention.

[0034] Referring to Figures 1 to 15 As shown, the present invention discloses a foolproof device for playing a foolproof role during the processing of the frame body 1.

[0035] The frame body 1 includes a first cross bar 11 and a second cross bar 12 arranged along a first direction, and a connecting rod 13 connecting the first cross bar 11 and the second cross bar 12, and the number of the connecting rods 13 is at least one.

[0036] Among them, one end of the first cross bar 11 has a first hole 110; both ends of the second cross bar 12 have second holes 120, and the projected area of the first hole 110 is larger than the projected area of the second hole 120; the other end of the first cross bar 11 has a first groove 111, and the projected shape of the first hole 110 partially overlaps with the projected shape of the first groove 111; the other end of the second cross bar 12 has a second groove 121, and the projected shape of the second hole 120 partially overlaps with the projected shape of the second groove 121.

[0037] In detail, the axial direction of the first hole 110 is the same as the first direction; the axial direction of the second hole 120 is the same as the first direction.

[0038] The foolproof device includes a first foolproof component 2, and the first foolproof component 2 is adapted to the first hole 110.

[0039] Specifically, the first foolproof component 2 includes a first connection seat 20, a first connecting rod 21 and a first pin shaft 22. The first connection seat 20 is provided with a first through hole 201, and the first through hole 201 is arranged along a second direction, and the second direction is perpendicular to the first direction, and the second direction is the height direction. The first connecting rod 21 is movably connected to the first connection seat 20 along the first direction, and the first connecting rod 21 matches the first hole 110, that is, the first hole 110 can accommodate the first connecting rod 21 to pass through.

[0040] Furthermore, a first card slot 210 is arranged radially on one side of the first connecting rod 21. When the first card slot 210 overlaps with the first through hole 201 in the second direction, at this time, the first pin shaft 22 can pass through the first through hole 201 and be clamped with the first card slot 210, and the first pin shaft 22 can be rotationally locked; Therefore, when the above operation can be successfully completed, it indicates that the hole is the first hole 110, and thus the corresponding first cross bar 11 can be accurately judged.

[0041] The anti-fooling device further includes a second anti-fooling component 3, and the first anti-fooling component 3 is adapted to the second hole 120.

[0042] Specifically, the second anti-fooling component 3 includes a second connecting seat 30, a movable rod assembly, and a second pin shaft 31. The second connecting seat 30 is provided with a second through hole 301, and the second through hole 301 is arranged along the second direction. The movable rod assembly includes a second connecting rod 32 and a connecting sleeve 33. The connecting sleeve 33 is movably sleeved on the second connecting rod 32. The second connecting rod 32 matches the second hole 120, that is, the second connecting rod 32 can just pass through the second hole 120.

[0043] The connecting sleeve 33 matches the first hole 110; a second clamping groove 320 is arranged on the second connecting rod 32 along the radial direction, and the connecting sleeve 33 is provided with a third clamping groove 330. When the second clamping groove 320 overlaps with the third clamping groove 330, the second pin shaft 31 can pass through the second through hole 301 and be clamped with the second clamping groove 320, and can be rotationally locked.

[0044] Therefore, when the above operation can be successfully completed, it indicates that the hole is the second hole 120. Thus, it is possible to accurately judge the corresponding second cross bar 12.

[0045] It can be known from this that an anti-fooling device to be protected by the present invention is provided with a first anti-fooling component and a second anti-fooling component. The first anti-fooling component can match the first hole on the first cross bar, so that the first hole can be effectively identified through the first anti-fooling component. When the first anti-fooling component can be assembled at the end of the cross bar, it indicates that the cross bar is the first cross bar; otherwise, it indicates that the cross bar is the second cross bar. Correspondingly, the second anti-fooling component can match the second hole on the second cross bar, so that the second hole can be effectively identified through the second anti-fooling component. When the second anti-fooling component can be assembled at the end of the cross bar, it indicates that the cross bar is the second cross bar; otherwise, it indicates that the cross bar is the first cross bar. By using the anti-fooling device of the present invention, two cross bars with similar shapes on the frame body, namely the first cross bar and the second cross bar, can be effectively distinguished, thereby ensuring the accuracy during subsequent assembly, improving the qualified rate of products, and effectively improving the production efficiency at the same time.

[0046] As a preferred embodiment, the projection of the first hole 110 along the axial direction is oval, and the projection of the second hole 120 along the axial direction is circular.

[0047] Furthermore, the first connecting seat 20 is further provided with a third through hole 202, the third through hole 202 is arranged along the first direction, the first connecting rod 21 is movably arranged in the third through hole 202, and when the first pin shaft 22 is clamped with the first clamping groove 210, the end of the first connecting rod 21 is received in the third through hole 202. By designing the length of the first connecting rod 21, it can further play a role in facilitating identification. Combining Figures 5 - 6 As shown, when the first anti-fooling component 2 is assembled to one end of the first cross bar 11, since the first connecting rod 21 fits with the first hole 110, the end of the first connecting rod 21 does not exceed the dimension range of the first connecting seat 20 in the first direction; on the contrary, when the first connecting rod 21 protrudes from the third through hole 202 and protrudes from the first connecting seat 20, it indicates that the cross bar is the second cross bar 12, rather than the first cross bar 11, thus facilitating the installer to quickly identify and confirm.

[0048] Looking at the details, referring to Figures 10 - 15 As shown, the second connecting seat 30 is further provided with a fourth through hole 302, the fourth through hole 302 is arranged through the second connecting seat 30 along the first direction; the movable rod assembly is movably arranged in the fourth through hole 302, and when the second pin shaft 31 is clamped with the second clamping groove 320, the end of the second connecting rod 32 is received in the fourth through hole 302. With such a setting, it can also further play a role in facilitating the installer to quickly identify. When the second anti-fooling component 3 is assembled with the cross bar, when the end of the second connecting rod 32 can be received in the fourth through hole 302, it indicates that the cross bar is the second cross bar 12; on the contrary, during the installation process, when the second connecting rod 32 protrudes from the fourth through hole 302 and protrudes from the second connecting seat 30 in the first direction, it indicates that the cross bar is the first cross bar 11.

[0049] Furthermore, the second anti-fooling component 3 further includes a connecting column 34, and the end parts of the connecting column 34 are respectively connected to the connecting sleeve 33. One end of the second connecting rod 32 is recessed axially to form a receiving space 321, and the second connecting rod 32 is also provided with a fifth through hole 322 opposite to each other, and the fifth through hole 322 extends along the axial direction of the second connecting rod 32, that is, the fifth through hole 322 extends along the first direction.

[0050] The connecting sleeve 33 is relatively provided with a sixth through hole 331. The projection of the sixth through hole 331 along the radial direction of the second connecting rod 32 is a part of the projection of the fifth through hole 322 along the radial direction of the second connecting rod 32. Both the fifth through hole 322 and the sixth through hole 331 are located on both sides of the receiving space 321. It should be noted that both ends of the connecting column 34 are respectively installed in the sixth through hole 331, so that the connecting column 34 is fixedly connected to the connecting sleeve 33. The connecting column 34 can move along the fifth through hole 322 under the drive of the connecting sleeve 33, and the fifth through hole 322 plays a role in limiting the stroke of the connecting column 34.

[0051] Specifically, during the assembly process of the second anti-fooling component 3, the second connecting rod 32 moves along the first direction. If it corresponds to the second cross bar 12, the second connecting rod 32 can be inserted into the second hole 120. At this time, the second connecting rod 32 is inserted into the second hole 120, and the connecting sleeve 33 abuts against the end of the second cross bar 12. Since the connecting sleeve 33 cannot be inserted into the second hole 120, the connecting sleeve 33 will move in the opposite direction to the movement direction of the second connecting rod 32. At this time, the connecting column 34 will also move along the fifth through hole 322. When it moves to the end of the stroke, the connecting column 34 abuts against the edge of the fifth through hole 322. At this time, the second card slot 320 overlaps with the third card slot 330, and also overlaps with the second through hole 301 in the height direction. Thus, the second pin shaft 31 can pass through the second through hole 301 and be inserted into the second card slot 320 and the third card slot 330, and the second pin shaft 31 can be locked.

[0052] It is worth noting that the ingenious design of this device also lies in that since the cross-sectional shape of the connecting sleeve 33 is set to be adapted to the first hole 110, when the second anti-fooling component 3 is assembled with the first hole 110, the connecting sleeve 33 will not be blocked by the first hole 110 on the first cross bar 11. Thus, the connecting sleeve 33 and the second connecting rod 32 will always move synchronously, and will not trigger the movement of the connecting column 34 in the fifth through hole 322. Therefore, the second card slot 320 and the third card slot 330 are in an overlapping state, the second card slot 320 and the third card slot 330 are always in the initial staggered state, and cannot overlap with the second through hole 301 in the height direction. Thus, the second pin shaft 31 cannot pass through the second through hole 301 and be inserted into the second card slot 320. Thus, the installer can obviously judge that this cross bar is the first cross bar 11, rather than the second cross bar 12.

[0053] As a preferred embodiment, the anti-fooling device further includes a frame 4, and the frame body 1, the first anti-fooling component 2 and the second anti-fooling component 3 are assembled on the frame 4.

[0054] As a preferred embodiment, two sets of the first anti-fooling components 2 are provided, which are respectively arranged at both ends of the first cross bar 11. One set of the first anti-fooling components 2 is used to cooperate with the first hole 110, and the other set of the anti-fooling components 2 is used to cooperate with the first groove 111. The anti-fooling detection principle of the first groove 111 is the same as that of the first hole 110. Two sets of the second anti-fooling components 3 are provided, which are respectively arranged at both ends of the second cross bar 12. One set of the second anti-fooling components 3 is used to cooperate with the second hole 120, and the other set of the anti-fooling components 3 is used to cooperate with the second groove 121. The anti-fooling detection principle of the second groove 121 is the same as that of the second hole 120. With such a setting, on the one hand, it is convenient to effectively distinguish the first cross bar 11 and the second cross bar 12 during subsequent operations. On the other hand, after the first anti-fooling component 2 and the second anti-fooling component 3 are combined with the frame, a certain supporting force can be obtained, thereby facilitating subsequent installation and processing procedures.

[0055] Specifically, the frame includes a first cross beam 41 and a second cross beam 42 arranged oppositely, and a third cross beam 43 and a fourth cross beam 44 arranged oppositely. The first cross beam 41, the second cross beam 42, the third cross beam 43 and the fourth cross beam 44 are connected end to end in sequence. Among them, the third cross beam 43 and the fourth cross beam 44 extend along the first direction.

[0056] In order to improve the anti-fooling recognition degree of installers, the anti-fooling device further includes a first extension rod 51 and a second extension rod 52. The first extension rod 51 is docked with the first connecting rod 21 and can move synchronously with the first connecting rod 21; the second extension rod 52 is docked with the second connecting rod 32 and can move synchronously with the second connecting rod 32. When the first anti-fooling component 2 is assembled in the first hole 110, the first extension rod 51 can be received in the frame 4. When the second anti-fooling component 3 is assembled in the second hole 120, the second extension rod 52 can be received in the frame 4. In this way, it is convenient for operators to identify whether the installation is accurate and whether the installation positions of the first cross bar 11 and the second cross bar 12 meet the requirements, and can improve the anti-fooling efficiency to a certain extent.

[0057] As a preferred implementation, the first anti-fooling component 2 further includes a first mounting seat 23, the first mounting seat 23 and the first connecting seat 20 are arranged in parallel on the frame 4, and the first mounting seat 23 is provided with a first avoidance hole for the first connecting rod 21 to pass through.

[0058] The second anti-fooling component 3 further includes a second mounting seat 35, the second mounting seat 35 and the second connecting seat 30 are arranged in parallel on the frame 4, and the second mounting seat 35 is provided with a second avoidance hole for the second connecting rod 32 to pass through.

[0059] In the description of the present invention, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0060] In the present invention, unless otherwise clearly specified and defined, the terms "mounting", "connecting", "coupling", "fixing", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium; it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A foolproof device, characterized in that: For anti-fooling during the processing of the frame body. The frame body includes a first cross bar and a second cross bar arranged along a first direction. One end of the first cross bar has a first hole; one end of the second cross bar has a second hole. The projected area of the first hole is larger than the projected area of the second hole. The anti-fooling device includes, A first anti-fooling component, which includes a first connecting seat, a first connecting rod and a first pin shaft. The first connecting seat is provided with a first through hole, and the first through hole is arranged along a second direction, and the second direction is perpendicular to the first direction; the first connecting rod is movably connected to the first connecting seat along the first direction, and the first connecting rod matches the first hole; a first card slot is arranged radially on one side of the first connecting rod. When the first card slot overlaps with the first through hole in the second direction, the first pin shaft is clamped with the first card slot through the first through hole; A second anti-fooling component, which includes a second connecting seat, a movable rod component and a second pin shaft. The second connecting seat is provided with a second through hole, and the second through hole is arranged along the second direction. The movable rod component includes a second connecting rod and a connecting sleeve. The connecting sleeve is movably sleeved on the second connecting rod, and the second connecting rod matches the second hole; the connecting sleeve matches the first hole; a second card slot is arranged on the second connecting rod, and a third card slot is arranged on the connecting sleeve. When the second card slot overlaps with the third card slot, the second pin shaft is clamped with the second card slot through the second through hole.

2. The anti-fooling device according to claim 1, characterized in that: The projection of the first hole along the axial direction is oval, and the projection of the second hole along the axial direction is circular.

3. The anti-fooling device according to claim 1, wherein: The first connecting seat is further provided with a third through hole, and the third through hole is arranged along the first direction. The first connecting rod is movably arranged in the third through hole. When the first pin shaft is clamped with the first card slot, the end of the first connecting rod is received in the third through hole.

4. A foolproof device according to claim 1, characterized in that: The second connecting seat is further provided with a fourth through hole, and the fourth through hole is arranged along the first direction. The movable rod component is movably arranged in the fourth through hole. When the second pin shaft is clamped in the second card slot, the end of the second connecting rod is received in the fourth through hole.

5. A foolproof device according to claim 1, characterized in that: The second anti-fooling component further includes a connecting column. One end of the second connecting rod is recessed axially to form a receiving space. The second connecting rod is also provided with a fifth through hole relatively, and the fifth through hole extends along the axial direction of the second connecting rod; the connecting sleeve is provided with a sixth through hole relatively, and the sixth through hole and the fifth through hole partially overlap in the radial direction of the second connecting rod; both ends of the connecting column are connected to the connecting sleeve through the sixth through hole respectively. Driven by the connecting sleeve, the connecting column can move in the fifth through hole.

6. The anti-fooling device according to claim 1, characterized in that: It further includes a frame; the frame body, the first anti-fooling component and the second anti-fooling component are assembled on the frame; two groups of the first anti-fooling components are provided, and are respectively arranged at both ends of the first cross bar; two groups of the second anti-fooling components are provided, and are respectively arranged at both ends of the second cross bar.

7. An anti-fooling device according to claim 6, characterized in that: The frame includes a first cross beam and a second cross beam which are oppositely arranged, and a third cross beam and a fourth cross beam which are oppositely arranged. The first cross beam, the second cross beam, the third cross beam and the fourth cross beam are sequentially connected end to end, and the third cross beam and the fourth cross beam extend along the first direction.

8. The anti-fooling device according to claim 6, characterized in that: It further includes a first extension rod and a second extension rod. The first extension rod is docked with the first connecting rod and can move synchronously with the first connecting rod; the second extension rod is docked with the second connecting rod and can move synchronously with the second connecting rod; when the first anti-fooling component is assembled in the first hole, the first extension rod is received in the frame, and when the second anti-fooling component is assembled in the second hole, the second extension rod is received in the frame.

9. The anti-fooling device according to claim 1, characterized in that: The first anti-fooling component further includes a first mounting seat. The first mounting seat is arranged in parallel with the first connecting seat, and a first avoidance hole for the first connecting rod to pass through is provided on the first mounting seat.

10. The anti-fooling device according to claim 1, wherein: The second anti-fooling component further includes a second mounting seat. The second mounting seat is arranged in parallel with the second connecting seat, and a second avoidance hole for the second connecting rod to pass through is provided on the second mounting seat.

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