Circuit breaker moving contact system and mechanism connection structure

Abstract

A circuit breaker moving contact system and mechanism connecting structure comprises a contact support and a connecting rod, and one end of the connecting rod extends into the inner side of the contact support from a notch on the contact support. One end of the connecting rod, which extends into the inner side of the contact support from a notch on the contact support, is rotatably mounted on the inner side of the contact support through a mounting shaft, and one end of the connecting rod, which is positioned on the outer side of the contact support, is connected with a mechanism crank arm through a shaft pin. According to the connecting structure, the connecting mode of a circuit breaker moving contact system and a mechanism is simplified, the assembly difficulty is reduced, neglected assembly of parts is avoided, and the parts are prevented from falling off in the using process.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit breakers, and specifically relates to a moving contact system and a mechanism connection structure of a circuit breaker. Background Art

[0002] The circuit breaker is an important part of the distribution electrical appliance, mainly used in the industrial low-voltage power system to connect and disconnect the current in the power grid circuit and protect the line and power supply equipment from the hazards of overload, undervoltage, short circuit, single-phase grounding and other faults. Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their application scope. The low-voltage circuit breaker is also called an automatic switch, commonly known as an "air switch", which is also a low-voltage circuit breaker. It is an electrical appliance that has the function of a manual switch and can automatically perform undervoltage, overvoltage, overload, and short-circuit protection. It can be used to distribute electric energy, start asynchronous motors infrequently, and protect power supply lines and motors, etc. When they have serious overload, short circuit, undervoltage and other faults, it can automatically cut off the circuit. Its function is equivalent to the combination of a fuse switch and an over- and under-heat relay, etc. Moreover, generally no parts need to be changed after breaking the fault current, and it has been widely used.

[0003] With the improvement of users' requirements for the safety and security of universal circuit breakers, the power transmission safety of circuit breakers has been paid more and more attention. As the conductive part of the main circuit of the circuit breaker, the reliability of the moving contact will directly affect the safety performance of the entire circuit breaker. However, the connection method between the operating mechanism and the contact mechanism of the existing universal circuit breaker lacks a reliable limiting function. The existing limiting methods are not only complex in structure, but also cumbersome in the assembly process. They are prone to fatigue after multiple opening and closing operations of the circuit breaker, which may cause the moving contact to lose its driving force, and then separate from the static contact under the action of the electric repulsive force, resulting in the main circuit not being energized after the circuit breaker is closed with a missing phase. In addition, the moving contact has no pulling force, which is also likely to cause the opening distance between it and the static contact to be insufficient, resulting in a large amount of electric arcs generated after energization, easily burning out the main circuit and triggering safety accidents.

[0004] Chinese Patent CN206516592U discloses a contact structure of a universal circuit breaker, which includes a contact mechanism, an energy storage mechanism, and a rotating shaft assembly connected between the contact mechanism and the energy storage mechanism. The energy storage mechanism drives the contact mechanism to close through the rotating shaft assembly. The rotating shaft assembly includes a rotating shaft cooperating with the energy storage mechanism and a cantilever provided on the rotating shaft. The contact mechanism includes a contact support and a moving contact provided in the contact support. The contact support is connected to the cantilever through a connecting rod. The contact support is provided with a connecting hole through which the connecting rod can pass. The connecting rod includes a connecting portion extending out of the connecting hole and pivotally connected to the cantilever through a shaft pin. The connecting portion and the cantilever are respectively provided with shaft holes cooperating with the shaft pin. The contact support is provided with limiting blocks on both sides of the connecting hole to limit the two ends of the shaft pin respectively. While limiting the shaft pin by providing the limiting blocks on the contact support, the connecting rod can also be limited, making the limiting effect more reliable, and the structure is simple and has high strength, simplifying the assembly process. However, in this contact structure, the connection between the connecting rod and the contact support is limited by a shift lever and a shift lever spring, and the shift lever is prone to breakage, and the failure probability of the entire mechanism is relatively high. Summary of the Utility Model

[0005] The purpose of the present utility model is to provide a connection structure between the moving contact system and the mechanism of a circuit breaker, which aims at the defects that the shift lever in the existing connection between the moving contact system and the mechanism of the universal circuit breaker is prone to breakage and the structure fails. The shift lever is cancelled, the connection structure is simplified, and the assembly difficulty is reduced.

[0006] Technical Solution

[0007] To achieve the above technical purpose, the present utility model provides a connection structure between the moving contact system and the mechanism of a circuit breaker, which includes a contact support and a connecting rod. One end of the connecting rod extends into the inner side of the contact support from the slot opening on the contact support. The end of the connecting rod extending into the inner side of the contact support from the slot opening on the contact support is rotatably installed on the inner side of the contact support through a mounting shaft. The end of the connecting rod located outside the contact support is connected with a mechanism crank arm through a shaft pin. At least one side of the outer side surface of the contact support located on both sides of the connecting rod is provided with a limiting boss. The end of the connecting rod located outside the contact support is provided with a shaft hole. The shaft pin passes through the shaft hole and the hole on the mechanism crank arm to connect the connecting rod with the mechanism crank arm;

[0008] When the mechanism and the moving contact system are installed in the circuit breaker base, the projection of the shaft pin and the limiting boss on the contact support in the plane where the radial direction of the shaft hole is located overlaps at least partially during the movement of the mechanism and the moving contact system;

[0009] When the operating mechanism is not installed on the circuit breaker base and the moving contact system is installed in the circuit breaker base, there is at least one position where the projection of the shaft hole on the connecting rod and the limiting boss on the contact support in the plane where the radial direction of the shaft hole is located does not overlap during the movement of the mechanism and the moving contact system.

[0010] In one embodiment, limiting bosses are arranged on both sides of the connecting rod on the outer side surface of the contact support.

[0011] In one embodiment, the diameter of the shaft pin is smaller than the diameter of the shaft hole.

[0012] In one embodiment, a limiting boss is arranged on any one of the two sides of the connecting rod on the outer side surface of the contact support.

[0013] In one embodiment, both ends of the mounting shaft are mounted on the connecting holes on the inner side of the contact support.

[0014] In one embodiment, a relief groove is arranged on the breaker base to avoid the rotation stroke of the connecting rod around the mounting shaft.

[0015] In one embodiment, a tight-fitting part is arranged on the inner side of the contact support to limit the rotation stroke of the connecting rod.

[0016] In one embodiment, the tight-fitting part is a notch at the corresponding position between the inner side of the contact support and the connecting rod.

[0017] In one embodiment, one end of the connecting rod connected to the mechanism crank arm is of a U-shaped structure, the mechanism crank arm is located between the two side walls of the U-shaped structure, and the shaft hole is located on the two side walls;

[0018] Or one end of the mechanism crank arm connected to the connecting rod is of a U-shaped structure, and the connecting rod is located between the two side walls of the U-shaped structure.

[0019] In one embodiment, one end of the connecting rod connected to the mechanism crank arm is of a U-shaped structure, the mechanism crank arm is located between the two side walls of the U-shaped structure, and the shaft hole is located on the two side walls;

[0020] Or one end of the mechanism crank arm connected to the connecting rod is of a U-shaped structure, and the connecting rod is located between the two side walls of the U-shaped structure.

[0021] In one embodiment, an anti-fooling structure is arranged on the outer side wall of the U-shaped structure away from the limiting boss to ensure that the shaft pin will not come out of the shaft hole on the outer side wall of the U-shaped structure away from the limiting boss.

[0022] In one embodiment, the anti-fooling structure is a bending structure or a welding structure on one side wall of the U-shaped structure away from the limiting boss.

[0023] In one embodiment, the diameter of the shaft pin is smaller than that of the shaft hole, and the anti-fooling structure and the shaft hole on the connecting rod overlap at least partially in the plane projected in the radial direction of the shaft hole;

[0024] Alternatively, a boss is provided at one end of the shaft pin, the diameter of the boss is larger than that of the shaft hole, the boss is located between one side wall close to the limit boss and the limit boss among the two side walls of the U-shaped structure, and the anti-fooling structure and the boss overlap at least partially in the plane projected in the radial direction of the shaft hole.

[0025] Beneficial effects

[0026] The utility model provides a moving contact system and a mechanism connection structure of a circuit breaker, which comprise a contact support and a connecting rod. One end of the connecting rod extends into the inner side of the contact support from the slot opening on the contact support. The end of the connecting rod extending into the inner side of the contact support from the slot opening on the contact support is rotatably installed on the inner side of the contact support through a mounting shaft. One end of the connecting rod located outside the contact support is connected with a mechanism crank arm through a shaft pin. This connection structure simplifies the connection mode between the moving contact system and the mechanism of the circuit breaker, reduces the assembly difficulty, avoids missing installation of parts, and prevents parts from falling off during use. Brief description of the drawings

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0028] Fig. Figure 1 is a schematic diagram of the connection structure between the moving contact system and the mechanism in Embodiment 1 of the present utility model;

[0029] Fig. Figure 2 is a schematic diagram of the installation of the connecting rod on the inner side of the contact support in Embodiment 1 of the present utility model;

[0030] Fig. Figure 3 is a schematic diagram of the installation of the connecting rod in Embodiment 1 of the present utility model Figure 1 ;

[0031] Fig. Figure 4 is a schematic diagram of the installation of the mechanism crank arm in Embodiment 1 of the present utility model;

[0032] Fig. Figure 5 is a schematic diagram of the connection between the connecting rod and the mechanism crank arm in Embodiment 1 of the present utility model;

[0033] Fig. 6 is a schematic diagram of the position of the relief groove in Embodiment 1 of the present utility model;

[0034] Appended Figure 7 is a schematic diagram of the position of the intravenous admixture department in Embodiment 1 of the present utility model; Specific embodiments

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some but not all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0036] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or there can also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the description of the present application are only for the purpose of illustration and do not represent the only implementation manner.

[0037] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0038] In the present application, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first feature is in direct contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0039] Unless otherwise defined, all technical and scientific terms used in the description of the present application have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs. The terms used in the description of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used in the description of the present application includes any and all combinations of one or more of the related listed items.

[0040] Embodiment

[0041] In the prior art, in the contact structure, the connection between the connecting rod and the contact support is limited by a lever and a lever spring. The lever is prone to breakage, and the probability of failure of the entire mechanism is relatively high. To solve this problem, this embodiment provides a moving contact system and a mechanism connection structure of a circuit breaker. As shown in the attached drawings Figure 1 shown, it includes a contact support 1 and a connecting rod 2. One end of the connecting rod 2 extends into the inner side of the contact support 1 from the slot opening 101 on the contact support 1. As shown in the attached drawings Figure 2 and 3 shown, one end of the connecting rod 2 extending into the inner side of the contact support 1 from the slot opening 101 on the contact support 1 is rotatably mounted on the inner side of the contact support 1 through a mounting shaft 3. As shown in the attached drawings Figure 4 shown, one end of the connecting rod 2 located outside the contact support 1 is connected with a mechanism crank arm 5 through a shaft pin 4.

[0042] Specifically, a shaft hole 201 is arranged at one end of the connecting rod 2 located outside the contact support 1. The shaft pin 4 passes through the shaft hole 201 and the hole on the mechanism crank arm 5 to connect the connecting rod 2 with the mechanism crank arm 5. One end of the connecting rod 2 connected with the mechanism crank arm 5 is of a U-shaped structure. The mechanism crank arm 5 is located between the two inner side walls of the U-shaped structure, and the shaft hole 201 is located on the two side walls. Of course, it can also be that one end of the mechanism crank arm 5 connected with the connecting rod 2 is of a U-shaped structure, and the connecting rod 2 is located between the two side walls of the U-shaped structure.

[0043] At least one side of the outer side surface of the contact support 1 located on both sides of the connecting rod 2 is provided with a limit boss 102; in this embodiment, a limit boss 102 is provided on any one side of the outer side surface of the contact support 1 located on both sides of the connecting rod 2. An anti-fooling structure 202 is provided on the outer side wall of the U-shaped structure far from the limit boss 102 to ensure that the shaft pin 4 will not come out from the shaft hole 201 on the outer side wall of the U-shaped structure far from the limit boss 102.

[0044] In this embodiment, the anti-fooling structure 202 is a bend on one side wall of the U-shaped structure far from the limit boss 102. In order for the shaft pin 4 to be smoothly installed into the shaft hole 201 and not fall off, the diameter of the shaft pin 4 is smaller than the diameter of the shaft hole 201, and the projection of the bend and the shaft hole 201 on the connecting rod 2 in the plane where the shaft hole 201 is located radially at least partially overlaps;

[0045] Or as shown in the attached drawings Figure 4 and the attached drawings Figure 5As shown, a boss is provided at one end of the shaft pin 4, and the diameter of the boss is larger than the diameter of the shaft hole 201. The boss is located between the side wall close to the limiting boss 102 and the limiting boss 102 on both side walls of the U-shaped structure, and the bend and the projection of the boss on the radial plane of the shaft hole 201 at least partially overlap. The purpose is that when the shaft pin 4 is to be installed, due to the bend on the side wall of the connecting rod 2 away from the limiting boss 102, the head of the shaft pin 4 (that is, the end with the boss) will interfere with the bend. Therefore, the shaft pin 4 can only be installed in the shaft hole 201 from the side of the shaft hole 201 located at the limiting boss 102 after the connecting rod 2 rotates around the installation axis 3 to be completely offset from the limiting boss 102.

[0046] In this embodiment, when one end of the mechanism arm 5 connected to the connecting rod 2 is a U-shaped structure, and the connecting rod 2 is located between the two side walls of the U-shaped structure, the anti-fool structure 202 can also be a welding structure on one side wall of the two outer side walls of the U-shaped structure away from the limiting boss 102, that is, there is no need to bend, and the protrusion can be directly welded on the side wall.

[0047] The specific requirement is that when the operating mechanism is not installed on the circuit breaker base a and the moving contact system is installed in the circuit breaker base a, the projection of the axial hole 201 on the connecting rod 2 and the limiting boss 102 on the contact support 1 in the plane where the axial hole 201 is located in the radial direction has at least one position without overlap during the movement of the mechanism and the moving contact system; when the mechanism and the moving contact system are installed in the circuit breaker base a, the projection of the axial pin 4 and the limiting boss 102 on the contact support 1 in the plane where the axial hole 201 is located in the radial direction at least partially overlap during the movement of the mechanism and the moving contact system. To further explain the specific installation process, the moving contact system is first installed in the circuit breaker base a, and the mechanism crank 5 is connected to the mechanism. Lift the connecting rod 2 and rotate it around the installation axis 3, and rotate it until the projection of the axial hole 201 and the limiting boss 102 in the plane where the axial hole 201 is located in the radial direction does not overlap, that is, it is completely offset, and the axial pin 4 is installed from the side of the axial hole 201 located at the limiting boss 102. Then install the operating mechanism on the base a. After installation, the mechanism acts on the installation shaft 3 through the connecting rod 2, driving the moving contact system to rotate around the rotation center, that is, the rotation shaft 105. During the movement of the mechanism and the moving contact system, the projections of the shaft pin 4 and the limiting boss 102 on the contact support 1 on the plane where the shaft hole 201 is located at least partially overlap, ensuring that the shaft pin 4 will not fall off during the use of the circuit breaker.

[0048] As attached Figure 2 As shown, both ends of the mounting shaft 3 are mounted on the connecting holes 103 inside the contact support 1. Figure 7 As shown, the circuit breaker base a is provided with a clearance groove a01 to avoid the rotation travel of the connecting rod 2 around the installation axis 3. Figure 6a and6b As shown, a tight-fitting portion 104 is provided inside the contact support 1 to limit the rotation stroke of the connecting rod 2. Specifically, in this embodiment, as shown in the appendix Figure 6a and 6b As shown, the tight-fitting portion 104 is a notch inside the contact support 1. When connecting the crank arm 5 of the connecting mechanism and the connecting rod 2, the connecting rod 2 needs to be lifted. After the connecting rod 2 is snapped into this notch, it will not fall off, which is convenient for inserting the shaft pin 4, avoiding the use of tools to keep the connecting rod 2 in the lifted position and reducing the installation difficulty.

[0049] Embodiment 2

[0050] In this embodiment, limiting bosses 102 are provided on both sides of the connecting rod 2 on the outer side surface of the contact support 1. The diameter of the shaft pin 4 is smaller than the diameter of the shaft hole 201. One end of the connecting rod 2 connected to the crank arm 5 of the mechanism is of a U-shaped structure, and the crank arm 5 of the mechanism is located between the two side walls of the U-shaped structure, and the shaft hole 201 is located on the two side walls; or one end of the crank arm 5 of the mechanism connected to the connecting rod 2 is of a U-shaped structure, and the connecting rod 2 is located between the two side walls of the U-shaped structure. In this structure, the two limiting bosses 102 block the shaft pin 4, so the shaft pin 4 will not fall off and there is no need for an anti-fooling structure.

[0051] The present utility model provides a moving contact system and a mechanism connection structure of a circuit breaker, which simplifies the connection mode between the moving contact system and the mechanism of the circuit breaker, reduces the assembly difficulty, avoids the omission of parts, and prevents the parts from falling off during use.

[0052] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0053] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A moving contact system and mechanism connection structure of a circuit breaker, which includes a contact support (1) and a connecting rod (2). One end of the connecting rod (2) extends into the inner side of the contact support (1) from the slotted opening (101) on the contact support (1). The end of the connecting rod (2) that extends into the inner side of the contact support (1) from the slotted opening (101) on the contact support (1) is rotatably mounted on the inner side of the contact support (1) through a mounting shaft (3). The end of the connecting rod (2) located outside the contact support (1) is connected to a mechanism crank arm (5) through a shaft pin (4), and the characteristics are as follows: At least one side of the outer side surface of the contact support (1) located on both sides of the connecting rod (2) is provided with a limiting boss (102); The end of the connecting rod (2) located outside the contact support (1) is provided with a shaft hole (201). The shaft pin (4) passes through the shaft hole (201) and the hole on the mechanism crank arm (5) to connect the connecting rod (2) and the mechanism crank arm (5); When the mechanism and the moving contact system are installed in the circuit breaker base (a), the projection of the shaft pin (4) and the limiting boss (102) on the contact support (1) in the plane where the radial direction of the shaft hole (201) is located overlaps at least partially during the movement of the mechanism and the moving contact system; When the operating mechanism is not installed on the circuit breaker base (a) and the moving contact system is installed in the circuit breaker base (a), there is at least one position where the projection of the shaft hole (201) on the connecting rod (2) and the limiting boss (102) on the contact support (1) in the plane where the radial direction of the shaft hole (201) is located does not overlap during the movement of the mechanism and the moving contact system.

2. The moving contact system and mechanism connection structure of a circuit breaker according to claim 1, characterized in that: Limiting bosses (102) are provided on both sides of the outer side surface of the contact support (1) located on both sides of the connecting rod (2).

3. The moving contact system and mechanism connection structure of a circuit breaker according to claim 2, characterized in that: The diameter of the shaft pin (4) is smaller than the diameter of the shaft hole (201).

4. The moving contact system and mechanism connection structure of a circuit breaker according to claim 1, characterized in that: Limiting bosses (102) are provided on any one side of the outer side surface of the contact support (1) located on both sides of the connecting rod (2).

5. The moving contact system and mechanism connection structure of a circuit breaker according to claim 1, characterized in that: Both ends of the mounting shaft (3) are installed on the connecting holes (103) on the inner side of the contact support (1).

6. The moving contact system and mechanism connection structure of a circuit breaker according to claim 1, characterized in that: A relief groove (a01) is provided on the circuit breaker base (a) to avoid the rotation stroke of the connecting rod (2) around the mounting shaft (3).

7. The moving contact system and mechanism connection structure of a circuit breaker according to claim 1, characterized in that: A tight-fitting part (104) is provided on the inner side of the contact support (1) to limit the rotation stroke of the connecting rod (2).

8. The moving contact system and mechanism connection structure of a circuit breaker according to claim 7, characterized in that: The tight-fitting part (104) is a notch at the corresponding position on the inner side of the contact support (1) and the connecting rod (2).

9. The moving contact system and mechanism connection structure of a circuit breaker according to claim 2, characterized in that: The end of the connecting rod (2) connected to the mechanism crank arm (5) is of a U-shaped structure. The mechanism crank arm (5) is located between the two side walls of the U-shaped structure, and the shaft hole (201) is located on the two side walls; Or the end of the mechanism crank arm (5) connected to the connecting rod (2) is of a U-shaped structure, and the connecting rod (2) is located between the two side walls of the U-shaped structure.

10. The moving contact system and mechanism connection structure of a circuit breaker according to claim 4, characterized in that: The end of the connecting rod (2) connected to the mechanism crank arm (5) is of a U-shaped structure. The mechanism crank arm (5) is located between the two side walls of the U-shaped structure, and the shaft hole (201) is located on the two side walls; Or one end of the mechanism crank arm (5) connected to the connecting rod (2) is of a U-shaped structure, and the connecting rod (2) is located between the two side walls of the U-shaped structure.

11. The moving contact system and mechanism connection structure of a circuit breaker according to claim 10, characterized in that: Anti-fooling structures (202) are arranged on the outer side walls of the two side walls of the U-shaped structure that are far away from the limit boss (102) to ensure that the pin (4) will not come out from the pin hole (201) on the outer side walls of the two side walls of the U-shaped structure that are far away from the limit boss (102).

12. The moving contact system and mechanism connection structure of a circuit breaker according to claim 11, characterized in that: The anti-fooling structure (202) is a bending structure or a welding structure on one side wall of the two side walls of the U-shaped structure that is far away from the limit boss (102).

13. The moving contact system and mechanism connection structure of a circuit breaker according to claim 11, characterized in that: The diameter of the pin (4) is smaller than the diameter of the pin hole (201), and the projection of the anti-fooling structure (202) and the pin hole (201) on the connecting rod (2) in the plane where the radial direction of the pin hole (201) is located overlaps at least partially; Or a boss is arranged at one end of the pin (4), the diameter of the boss is larger than the diameter of the pin hole (201), the boss is located between one side wall of the two side walls of the U-shaped structure that is close to the limit boss (102) and the boss (102), and the projection of the anti-fooling structure (202) and the boss in the plane where the radial direction of the pin hole (201) is located overlaps at least partially.

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