Electromagnet mechanism and safety belt locking device

Abstract

The application relates to an electromagnet mechanism and a safety belt locking device. The electromagnet mechanism comprises a main body part and an auxiliary monitoring part. The main body part comprises an electromagnetic assembly and a driving piece which can be attracted by the electromagnetic assembly, at least part of the driving piece can move towards or away from the electromagnetic assembly; the auxiliary monitoring part is arranged on one side of the electromagnetic assembly, the auxiliary monitoring part comprises a protective box and an auxiliary monitoring assembly, the auxiliary monitoring assembly comprises an auxiliary static contact and an auxiliary dynamic contact which are arranged in the protective box, part of the auxiliary dynamic contact extends to the outside of the protective box, when the driving piece moves towards the electromagnetic assembly, the part of the auxiliary dynamic contact extending to the outside of the protective box can be pressed to drive the auxiliary dynamic contact to move until the auxiliary dynamic contact can be closed or separated from the auxiliary static contact. The electromagnet mechanism can prevent the auxiliary monitoring assembly from being polluted or interfered by foreign matters, reduce the risk of failure of the auxiliary monitoring assembly, and the electromagnet mechanism has a compact structure.

Description

Technical Field

[0001] This application relates to the field of electromagnetic technology, and in particular to an electromagnet mechanism and a seat belt locking device. Background Technology

[0002] In vehicles, the electromagnet mechanism is a crucial component of the seatbelt locking system. The seatbelt locking system comprises a ratchet, a locking element, and an electromagnet mechanism. The electromagnetic component in the electromagnet mechanism attracts the armature, causing the locking element to selectively engage with the ratchet teeth on the ratchet, thereby selectively blocking the seatbelt retractor.

[0003] In related technologies, electromagnet mechanisms also include auxiliary monitoring components for monitoring the armature's state. These components include an auxiliary moving contact and an auxiliary stationary contact. When the armature is attracted, the auxiliary contact closes with the auxiliary stationary contact. However, during transportation or installation, foreign objects such as debris or dust can contaminate or interfere with the auxiliary monitoring components, potentially causing them to malfunction. Utility Model Content

[0004] Therefore, it is necessary to provide an electromagnet mechanism and a seat belt locking device to address the above problems. This mechanism can prevent the auxiliary monitoring components from being contaminated or interfered with by foreign objects, reduce the risk of failure of the auxiliary monitoring components, and has a compact structure.

[0005] On the one hand, an electromagnet mechanism is provided, comprising:

[0006] The main body includes an electromagnetic component and an active member that can be attracted by the electromagnetic component, at least a portion of which is movable toward or away from the electromagnetic component; and

[0007] The auxiliary monitoring section is located on one side of the electromagnetic component. The auxiliary monitoring section includes a protective box and an auxiliary monitoring component. The auxiliary monitoring component includes an auxiliary stationary contact and an auxiliary moving contact, both located inside the protective box. The auxiliary moving contact can move towards or away from the auxiliary stationary contact. A portion of the auxiliary moving contact extends outside the protective box. When the active component moves towards the electromagnetic component, it can drive the portion of the auxiliary moving contact extending outside the protective box to move the auxiliary moving contact until it can close or separate from the auxiliary stationary contact.

[0008] In one embodiment, the main body further includes a yoke plate, the electromagnetic component includes a coil assembly and a magnetic conductor disposed in the coil assembly, the coil assembly includes a coil frame and a coil, the coil frame includes a winding drum and a first flange disposed at one axial end of the winding drum, the protective box is located on one side of the first flange, the magnetic conductor passes through the winding drum, the yoke plate is disposed on one side of the winding drum, one end of the driving member is connected to the yoke plate, the other end is located on one side of the first flange, the end of the driving member away from the yoke plate can move towards or away from the magnetic conductor, and the protective box is connected to the first flange.

[0009] In one embodiment, the protective box includes a support base and a protective shell. The support base is connected to the first flange, and the protective shell is detachably disposed on one side of the support base. A cavity is formed between the support base and the protective shell. The auxiliary stationary contact is disposed in the cavity, and a portion of the auxiliary moving contact is disposed in the cavity.

[0010] In one embodiment, the support includes a base body and a first snap-fit ​​protrusion protruding from the base body, the first snap-fit ​​protrusion snapping into the protective shell.

[0011] And / or, the protective shell includes a shell body and a second snap-fit ​​protrusion protruding from the shell body, the second snap-fit ​​protrusion snapping into the support base.

[0012] In one embodiment, the support base and the first flange are an integral structure.

[0013] In one embodiment, the auxiliary monitoring section further includes an auxiliary static lead-out terminal and an auxiliary dynamic lead-out terminal connected to the support base. The auxiliary static lead-out terminal is connected to the auxiliary static contact, and the auxiliary dynamic lead-out terminal is connected to the auxiliary dynamic contact. Both the end of the auxiliary static lead-out terminal away from the auxiliary static contact and the end of the auxiliary dynamic lead-out terminal away from the auxiliary dynamic contact extend to the outside of the protective box.

[0014] In one embodiment, the support base includes a base body and a first fixing part and a second fixing part, both protruding from the base body. The base body is disposed on one side of the protective shell. The first fixing part and the second fixing part are both located in the cavity. The auxiliary static contact is connected to the first fixing part, and the auxiliary dynamic lead-out terminal is connected to the second fixing part.

[0015] In one embodiment, the base body is formed with a first limiting groove and a second limiting groove spaced apart from the first limiting groove. Both the first limiting groove and the second limiting groove communicate with the interior and exterior of the protective box. The end of the auxiliary stationary lead-out terminal away from the auxiliary stationary contact passes through the first limiting groove and extends to the exterior of the protective box. The end of the auxiliary movable lead-out terminal away from the auxiliary movable contact passes through the second limiting groove and extends to the exterior of the protective box. The protective shell abuts against the side of the auxiliary stationary lead-out terminal facing the opening of the first limiting groove and the side of the auxiliary movable lead-out terminal facing the opening of the second limiting groove.

[0016] In one embodiment, the auxiliary moving contact includes an auxiliary moving contact body for contacting the auxiliary stationary contact and a pressing part for being pressed by the active member. The auxiliary moving contact body is located inside the protective box, which is provided with a clearance opening. One end of the pressing part is connected to the auxiliary moving contact body, and the other end is used to contact the active member. The end of the pressing part away from the auxiliary moving contact body passes through the clearance opening and extends to the outside of the protective box.

[0017] In one embodiment, the auxiliary moving contact includes an auxiliary moving contact body for contacting the auxiliary stationary contact and a connecting portion connected to the active contact. The auxiliary moving contact body is disposed inside the protective box, and the protective box is provided with a clearance opening. The end of the connecting portion away from the active contact passes through the clearance opening and extends into the interior of the protective box.

[0018] On the other hand, a seat belt locking device is also provided, including a ratchet, a locking member and the above-mentioned electromagnet mechanism. The ratchet is disposed on one side of the electromagnet mechanism, one end of the locking member is connected to the driving member of the electromagnet mechanism, and the other end is used to engage with the ratchet teeth on the ratchet.

[0019] The aforementioned electromagnet mechanism incorporates a protective box within the auxiliary monitoring component. The auxiliary moving contact and auxiliary active component are housed inside this protective box, preventing foreign objects from entering and contaminating the auxiliary stationary and moving contacts. This reduces the risk of failure due to contamination and improves the reliability of the electromagnet mechanism. Furthermore, placing the auxiliary monitoring component on one side of the electromagnetic component allows for the creation of a cleaner area there, further reducing the probability of foreign objects entering through gaps in the protective box and minimizing contamination. Additionally, positioning the auxiliary monitoring component on one side of the electromagnetic component maximizes the use of space, enhancing the overall compactness of the electromagnet mechanism and better meeting customer requirements. Attached Figure Description

[0020] Figure 1 This is a perspective view of an electromagnet mechanism in some embodiments of this application.

[0021] Figure 2 This is a perspective view of the electromagnet mechanism in some embodiments of this application after the protective shell has been removed.

[0022] Figure 3 This is a top view of an electromagnet mechanism in some embodiments of this application.

[0023] Figure 4 This is a top view of the electromagnet mechanism in some embodiments of this application after the protective shell has been removed.

[0024] Figure 5 This is a side view of the coil frame and support base in some embodiments of this application.

[0025] Figure 6 This is a structural diagram of the protective shell in some embodiments of this application.

[0026] Figure 7 This is a connection structure diagram of the auxiliary moving contact and the auxiliary moving lead-out terminal in some embodiments of this application.

[0027] Figure 8 This is a connection structure diagram of the auxiliary stationary contact and the auxiliary stationary lead-out terminal in some embodiments of this application.

[0028] Figure 9 A perspective view of some implementations of the electromagnet mechanism of this application after the protective shell has been removed.

[0029] Figure 10 for Figure 9 The top view of the electromagnet mechanism shown.

[0030] Figure 11 This is a structural diagram of the seat belt locking device in some embodiments of this application.

[0031] In the picture:

[0032] 1. Protective box; 11. Support base; 111. Base body; 1111. First limiting groove; 1112. Second limiting groove; 112. First snap-fit ​​protrusion; 113. First fixing part; 114. Second fixing part; 12. Protective shell; 121. First snap-fit ​​recess; 122. Clearance opening; 2. Auxiliary stationary contact; 21. Auxiliary stationary contact body; 22. First connecting section; 3. Auxiliary moving contact; 31. Auxiliary moving contact body; 32. Pressing part; 33. Connecting part; 4. 41. Active component; 411. Armature; 412. Armature body; 42. Pressing block; 42. Moving spring; 421. First section; 422. Second section; 43. Tension spring; 5. Coil frame; 51. First flange; 52. Second flange; 53. Winding drum; 6. Magnetic conductor; 7. Auxiliary stationary lead-out terminal; 8. Auxiliary moving lead-out terminal; 81. Terminal body; 82. Lead-out section; 83. Second connecting section; 9. Yoke plate; 10. Locking component; 100. Ratchet; 101. Ratchet tooth. Detailed Implementation

[0033] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0034] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0035] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0037] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0038] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0039] See Figure 1 and Figure 2 , Figure 1 A perspective view of an electromagnet mechanism in some embodiments of this application is shown. Figure 2This illustration shows a perspective view of an electromagnet mechanism after the protective shell has been removed, according to some embodiments of this application. One embodiment of this application provides an electromagnet mechanism comprising a main body and an auxiliary monitoring part. The main body includes an electromagnetic component and an active member 4 that can be attracted by the electromagnetic component. The active member 4 is disposed on one side of the electromagnetic component, and at least a portion of the active member 4 can move towards or away from the electromagnetic component. The auxiliary monitoring part is disposed on one side of the electromagnetic component and includes a protective box 1 and an auxiliary monitoring component. The protective box 1 is disposed on one side of the electromagnetic component. The auxiliary monitoring component includes an auxiliary stationary contact 2 disposed inside the protective box 1 and an auxiliary movable contact 3 that can move towards or away from the auxiliary stationary contact 2. A portion of the auxiliary movable contact 3 extends outside the protective box 1. When the active member 4 moves towards the electromagnetic component, it drives the portion of the auxiliary movable contact 3 extending outside the protective shell 12 to move, thereby driving the auxiliary movable contact 3 to move until the auxiliary movable contact 3 can close or separate from the auxiliary stationary contact 2.

[0040] Understandably, when the electromagnetic component is energized, it becomes magnetic and attracts the active component 4. Under the influence of magnetic force, at least a portion of the active component 4 moves towards the electromagnetic component. This movement of the active component 4 drives the auxiliary moving contact 3, causing it to move towards or away from the auxiliary stationary contact 2. This closes or separates the auxiliary moving contact 3 from the auxiliary stationary contact 2, thus monitoring the state of the active component 4. In this electromagnet mechanism, a protective box 1 is provided within the auxiliary monitoring component. The auxiliary moving contact 3 and the auxiliary active component 4 are housed inside the protective box 1. The protective box 1 prevents foreign objects from entering and contaminating the auxiliary stationary contact 2 and the auxiliary moving contact 3, thereby reducing the risk of failure due to foreign object contamination and improving the reliability of the electromagnet mechanism. In addition, by placing the auxiliary monitoring part on one side of the electromagnetic component, a relatively clean area can be set up on one side of the electromagnetic component to accommodate the auxiliary monitoring part during actual implementation. This reduces the probability of foreign objects entering the interior through the gaps in the protective box 1, further reducing the risk of the auxiliary monitoring component being contaminated by foreign objects. Furthermore, placing the auxiliary monitoring part on one side of the electromagnetic component can make full use of the space on one side of the electromagnetic component, improving the overall compactness of the electromagnet mechanism and helping to meet customer needs.

[0041] In some embodiments, continue reading Figure 1 , Figure 2 and Figure 4The main body also includes a yoke plate 9, and the electromagnetic components include a coil assembly and a magnetically conductive element 6 disposed in the coil assembly. The coil assembly includes a coil frame 5 and a coil (not shown in the figure). The coil frame 5 includes a winding drum 53 and a first flange 51 disposed at one axial end of the winding drum 53. The protective box 1 is located on one side of the first flange 51. The coil is wound around the outer periphery of the winding drum 53. The magnetically conductive element 6 passes through the winding drum 53, and the yoke plate 9 is located on one side of the winding drum 53. One end of the driving element 4 is connected to the yoke plate 9, and the other end is disposed on one side of the first flange 51. The end of the driving element 4 away from the yoke plate 9 can move towards or away from the magnetically conductive element 6. It is understood that the active component 4 has a certain elastic deformation capability. One end of the active component 4 is connected to the yoke plate 9, and the other end is located on one side of the first flange 51. In this way, the yoke plate 9 can provide support for the active component 4. When the coil is energized, the magnetic force of the magnetic conductor 6 drives the active component 4 to approach the magnetic conductor 6. When the coil is de-energized, the magnetic force of the magnetic conductor 6 disappears, and the active component 4 resets under the action of elasticity, driving the active component 4 to move away from the magnetic conductor 6. The protective box 1 is connected to the first flange 51, and the first flange 51 provides support for the protective box 1. In addition, since the protective box 1 is located on one side of the first flange 51, the auxiliary monitoring part is located on one side of the coil frame 5, making use of the space on one side of the coil frame 5, thereby making the internal structure of the electromagnet mechanism more compact. In this embodiment, the magnetic conductor 6 is an iron core. Of course, in other embodiments, the magnetic conductor 6 can also be a permanent magnet or an electromagnet, etc., and there is no specific limitation on the type of magnetic conductor 6.

[0042] See Figure 1 , Figure 2 and Figure 5 The coil frame 5 also includes a second flange 52, which is connected to the end of the winding drum 53 away from the first flange 51. One end of the yoke plate 9 is connected to the second flange 52, and the other end extends to the first flange 51.

[0043] The driving element 4 includes an elastic element and an armature 41. One end of the elastic element is connected to the yoke plate 9, and the other end is connected to the armature 41. When the coil is energized and the magnetic conductor 6 has a magnetic force, the magnetic conductor 6 drives the armature 41 to move closer to the magnetic conductor 6 under the action of the magnetic force, so that the armature 41 is close to the first flange 51, and the elastic element is extended. When the coil is de-energized and the magnetic force of the magnetic conductor 6 disappears, the magnetic force releases the driving force on the armature 41, and the elastic element resets under the action of elasticity, driving the armature 41 to move away from the magnetic conductor 6, thus realizing the reset of the armature 41.

[0044] In one example, combined Figure 1 and Figure 2The elastic element is a movable spring 42, which includes a first segment 421 and a second segment 422. The first segment 421 and the second segment 422 are connected and distributed at an angle. The second segment 422 is located on one side of the first flange 51 and can move closer to or further away from the first flange 51. The first segment 421 is connected to the yoke plate 9, and the armature 41 is connected to the second segment 422. When the coil is energized and the magnetic conductor 6 has a magnetic force, the magnetic conductor 6 drives the armature 41 to move closer to the magnetic conductor 6 under the action of the magnetic force, so that the armature 41 and the second segment 422 of the movable spring 42 move closer to the first flange 51. When the coil is de-energized and the magnetic force of the magnetic conductor 6 disappears, the magnetic force releases the driving force on the armature 41, and the movable spring 42 resets under the action of elasticity, driving the armature 41 to move away from the magnetic conductor 6, so that the magnetic conductor 6 and the second segment 422 of the movable spring 42 move away from the first flange 51.

[0045] In another example, combined Figure 9 and Figure 10 The elastic element is a tension spring 43, one end of which is connected to the armature 41, and the other end is connected to the yoke plate 9. When the coil is energized, the magnetic conductor 6 drives the armature 41 to move closer to the magnetic conductor 6 under the action of magnetic force, which causes the tension spring 43 to extend. When the coil is de-energized, the magnetic force of the magnetic conductor 6 disappears, releasing the driving force on the armature 41. The tension spring 43 automatically contracts under the action of elasticity, driving the armature 41 to move away from the magnetic conductor 6, thereby resetting the armature 41.

[0046] In this embodiment, one end of the magnetic conductor 6 protrudes from the side of the first flange 51 away from the winding drum 53. When the coil is energized and the magnetic conductor 6 has magnetic force, the armature 41 is driven to firmly engage with the magnetic pole surface of the magnetic conductor 6 under the action of the magnetic force, preventing the driving member 4 from accidentally moving away from the magnetic conductor 6 during coil energization. Of course, in other embodiments, one end of the magnetic conductor 6 can be flush with the side of the first flange 51 away from the winding drum 53; or one end of the magnetic conductor 6 can be recessed into the side of the first flange 51 away from the winding drum 53. In this case, when the coil is energized and the magnetic conductor 6 has magnetic force, the driving member 4 can be driven to adhere to one side of the first flange 51 under the action of the magnetic force.

[0047] In some embodiments, see Figure 1 and Figure 2The protective box 1 includes a support base 11 and a protective shell 12. The support base 11 is connected to a first flange 51. The protective shell 12 is detachably disposed on one side of the support base 11. A cavity is formed between the support base 11 and the protective shell 12. An auxiliary stationary contact 2 is disposed in the cavity, and a portion of an auxiliary moving contact 3 is also disposed in the cavity. The first support base 11 provides support for the protective shell 12 and the auxiliary monitoring component. The cavity formed between the protective shell 12 and the support base 11 provides space for the auxiliary stationary contact 2 and the auxiliary moving contact 3, which is beneficial for arranging the auxiliary stationary contact 2 and the auxiliary moving contact 3. Since the protective shell 12 is detachably disposed on one side of the support base 11, in actual implementation, the auxiliary stationary contact 2 and the auxiliary moving contact 3 can be installed on the support base 11, and then the protective shell 12 can be assembled onto the support base 11, reducing the assembly difficulty of the auxiliary monitoring component and the protective box 1.

[0048] In this embodiment, the protective shell 12 has a groove on the side facing the support base 11, and the support base 11 is disposed on the side of the protective shell 12 with the groove, so that the support base 11 and the side wall of the groove surround to form a cavity.

[0049] In some embodiments, see Figure 1 , Figure 2 , Figure 3 and Figure 4 The support base 11 includes a base body 111 and a first engaging protrusion 112 protruding from the base body 111. The first engaging protrusion 112 engages with the protective shell 12. The protective shell 12 has a first engaging recess 121 formed therein. The first engaging protrusion 112 engages with the first engaging recess 121, so that the protective shell 12 is engaged with the support base 11, thereby enabling the protective shell 12 to be detachably mounted on the support base 11. In this embodiment, the support base 11 includes at least two first engaging protrusions 112, and the protective shell 12 also has at least one first engaging recess 121. The first engaging recess 121 corresponds one-to-one with the first engaging protrusion 112, and the at least two first engaging protrusions 112 are spaced apart. In this way, the support base 11 can be engaged by at least two first engaging protrusions 112, which enhances the engagement strength between the protective shell 12 and the support base 11 and prevents the protective shell 12 from falling off the support base 11. The first snap-fit ​​protrusion 112 can be L-shaped, U-shaped, or Z-shaped, etc., and there are no specific restrictions on the structure of the first snap-fit ​​protrusion 112.

[0050] In some embodiments, the protective shell 12 includes a shell body and a second snap-fit ​​protrusion (not shown) protruding from the shell body. The second snap-fit ​​protrusion snaps into a support base 11, and a second snap-fit ​​recess is formed on the support base 11. The second snap-fit ​​protrusion snaps into the second snap-fit ​​recess, thus enabling the protective shell 12 to be detachably mounted on the support base 11. The second snap-fit ​​protrusion can be L-shaped, U-shaped, or Z-shaped, etc., and the structure of the second snap-fit ​​protrusion is not specifically limited here.

[0051] Of course, in actual implementation, while providing the first snap-fit ​​protrusion 112 on the base body 111, a second snap-fit ​​protrusion can also be provided on the shell body. The first snap-fit ​​protrusion 112 snaps into the protective shell 12, and the second snap-fit ​​protrusion snaps into the support base 11. This also allows the protective shell 12 to be detachably mounted on the support base 11. Alternatively, the protective shell 12 can be connected to the support base 11 by screws or other components. Here, no specific limitations are made on the structure that allows the protective shell 12 to be detachably mounted on the support base 11.

[0052] In this embodiment, see Figure 5 The support base 11 and the first flange 51 are an integral structure. Both the support base 11 and the coil frame 5 are insulating components. The support base 11 and the first flange 51 of the coil frame 5 are integrally formed, making the support base 11 and the first flange 51 an integral structure. Setting the support base 11 and the first flange 51 as an integral structure saves the components connecting the support base 11 and the first flange 51, eliminates the need for additional assembly of the support base 11 and the first flange 51, and reduces the risk of the support base 11 wobbling on the first flange 51, which is beneficial to improving the stability of the electromagnet mechanism. Of course, in other embodiments, the support base 11 and the first flange 51 can also be set as separate structures.

[0053] In some embodiments, the electromagnet mechanism is described in the following reference. Figure 1 and Figure 2 The auxiliary monitoring section also includes an auxiliary static lead-out terminal 7 and an auxiliary dynamic lead-out terminal 8 connected to the support base 11. The auxiliary static lead-out terminal 7 is connected to the auxiliary static contact 2, and the auxiliary dynamic lead-out terminal 8 is connected to the auxiliary dynamic contact 3. Both the end of the auxiliary static lead-out terminal 7 away from the auxiliary static contact 2 and the end of the auxiliary dynamic lead-out terminal 8 away from the auxiliary dynamic contact 3 extend outside the protective box 1. In this embodiment, the auxiliary dynamic lead-out terminal 8 is fixed on the support base 11, and the auxiliary dynamic lead-out terminal 8 is connected to the auxiliary dynamic contact 3, providing support for the auxiliary dynamic contact 3. It is understood that the electromagnet mechanism is used in conjunction with external electrical components (such as circuit boards), with both the end of the auxiliary dynamic lead-out terminal 8 away from the auxiliary dynamic contact 3 and the end of the auxiliary static lead-out terminal 7 away from the auxiliary static contact 2 extending outside the protective box 1, facilitating electrical connection between the auxiliary static lead-out terminal 7 and the auxiliary dynamic lead-out terminal 8 and the external electrical components. In this embodiment, the auxiliary stationary lead-out terminal 7 and the auxiliary stationary contact 2 are integrated into one structure, and the auxiliary moving lead-out terminal 8 and the auxiliary moving contact 3 are integrated into one structure.

[0054] See Figure 2 and Figure 4The support base 11 includes a base body 111 and a first fixing part 113 and a second fixing part 114, both protruding from the base body 111. The base body 111 is disposed on one side of the protective shell 12. The first fixing part 113 and the second fixing part 114 are both located in the cavity. The auxiliary stationary contact 2 is connected to the first fixing part 113, and the auxiliary moving lead-out terminal 8 is connected to the second fixing part 114. The first fixing part 113 provides fixing and support for the auxiliary stationary contact 2, and the second fixing part 114 provides support and fixing for the auxiliary moving lead-out terminal 8. In this embodiment, the auxiliary stationary contact 2 is inserted into the first fixing part 113, and the auxiliary moving lead-out terminal 8 is inserted into the second fixing part 114.

[0055] See Figure 1 , Figure 4 and Figure 5 The base body 111 has a first limiting groove 1111 and a second limiting groove 1112 spaced apart from the first limiting groove 1111. Both the first limiting groove 1111 and the second limiting groove 1112 connect the inside and outside of the protective box 1. The end of the auxiliary stationary lead-out terminal 7 away from the auxiliary stationary contact 2 passes through the first limiting groove 1111 and extends to the outside of the protective box 1. The end of the auxiliary movable lead-out terminal 8 away from the auxiliary movable contact 3 passes through the second limiting groove 1112 and extends to the outside of the protective box 1. The protective shell 12 abuts against the side of the auxiliary stationary lead-out terminal 7 facing the opening of the first limiting groove 1111 and the side of the auxiliary movable lead-out terminal 8 facing the opening of the second limiting groove 1112. With the cooperation of the protective shell 12, the limiting grooves of the base body 111 can limit the lead-out terminals, preventing them from shaking relative to the protective box 1, which helps to improve the stability of the electromagnet mechanism.

[0056] In some embodiments, see Figure 2 and Figure 7 The auxiliary moving contact 3 includes an auxiliary moving contact body 31 for contacting the auxiliary stationary contact 2 and a pressing part 32 for being pressed by the active member 4. The auxiliary moving contact body 31 is located inside the protective box 1. (See reference...) Figure 6The protective box 1 is provided with a clearance opening 122. One end of the pressing part 32 is connected to the auxiliary movable contact body 31, and the other end is used to contact the active member 4. The end of the pressing part 32 away from the auxiliary movable contact body 31 passes through the clearance opening 122 and extends to the outside of the protective box 1. It should be noted that when the protective box 1 includes a support base 11 and a protective shell 12, the interior of the protective box 1 refers to the cavity formed between the support base 11 and the protective shell 12. When the protective box 1 includes a protective shell 12, the protective shell is provided with a clearance opening. The armature 41 includes an armature body 411 and a pressing block 412 provided on the armature body 411. When the elastic member is a movable spring 42, the armature body 411 is connected to the movable spring 42, and the pressing block 412 protrudes from the side of the armature body 411 facing the protective box 1 and is used to press the pressing part 32. When the armature moves toward the magnetic conductor 6, the pressing block 412 on the armature 41 moves toward the pressing part, so that the pressing block 412 can press the pressing part 32, thereby enabling the auxiliary moving contact body 31 to contact or separate from the auxiliary stationary contact 2.

[0057] See Figure 4 , Figure 7 and Figure 8The auxiliary stationary contact 2 includes an auxiliary stationary contact body 21 for contacting the auxiliary moving contact body 31 and a first connecting section 22 connected to the auxiliary stationary contact body 21. The end of the first connecting section 22 away from the auxiliary stationary contact body 21 is inserted into the first fixing part 113. The auxiliary stationary lead-out terminal 7 is connected to the auxiliary stationary contact body 21. The auxiliary moving lead-out terminal 8 includes a lead-out section 82 and a terminal body 81 and a second connecting section 83 both disposed in the cavity. The lead-out section 82 and the second connecting section 83 are respectively connected to the terminal body 81. The terminal body 81 abuts against the seat body 111. The second connecting section 83 protrudes at least partially from the end of the terminal body 81 away from the seat body 111. The end of the second connecting section 83 away from the terminal body 81 is inserted into the second fixing part 114. The end of the lead-out section 82 away from the terminal body 81 extends through the second limiting groove 1112 to the outside of the protective box 1. The auxiliary moving contact body 31 of the auxiliary moving contact 3 is connected to the terminal body 81. The auxiliary stationary contact 2 is spaced apart and disposed on the side of the terminal body 81 away from the seat body 111. The auxiliary moving contact body 31 is disposed between the terminal body 81 and the auxiliary stationary contact 2. When the active member 4 does not press the pressing part 32 (i.e., when the coil is not energized), the auxiliary moving contact 3 and the auxiliary stationary contact 2 are closed. When the active member 4 presses the pressing part 32 (i.e., when the coil is energized), the auxiliary moving contact body 31 can move towards the terminal body 81, moving away from the auxiliary stationary contact 2, thus separating the auxiliary moving contact 3 from the auxiliary stationary contact 2. Of course, in other embodiments, it is also possible to configure the auxiliary moving contact 3 to separate from the auxiliary stationary contact 2 when the active member 4 does not press the pressing part 32, and the auxiliary moving contact body 31 to move towards the terminal body 81 when the active member 4 presses the pressing part 32, moving away from the auxiliary stationary contact 2, thus closing the auxiliary moving contact 3 from the auxiliary stationary contact 2.

[0058] In other embodiments, the auxiliary moving contact 3 includes an auxiliary moving contact body 31 for contacting the auxiliary stationary contact 2 and a connecting portion 33 connected to the active contact. The auxiliary moving contact body 31 is disposed inside the protective box 1, which has a clearance opening 122. The end of the connecting portion 33 away from the active contact passes through the clearance opening 122 and extends into the interior of the protective box 1. It should be noted that when the protective box 1 includes a support base 11 and a protective shell 12, the interior of the protective box 1 refers to the cavity formed between the support base 11 and the protective shell 12. When the protective box 1 includes a protective shell 12, the protective shell 12 has a clearance opening 122. In this example, the connecting portion 33 is connected to the armature 41 of the active contact. In actual implementation, the connecting part 33 can be welded, riveted or snapped to the armature 41, or any structure that can connect the connecting part 33 to the armature 41, so that the armature 41 can drive the auxiliary moving contact 3 to move as it approaches or the magnetic conductor 6, thereby enabling the auxiliary moving contact 3 to close or separate from the auxiliary stationary contact 2.

[0059] In one example, the auxiliary moving contact body 31 is disposed on one side of the auxiliary stationary contact 2. When the coil is not energized, the auxiliary moving contact body 31 is separated from the auxiliary stationary contact 2. When the coil is energized, as the armature 41 moves toward the magnetic conductor 6, the connecting part 33 drives the auxiliary moving contact body 31 to move toward the auxiliary stationary contact 2, so that the auxiliary moving contact body 31 and the auxiliary stationary contact 2 are closed.

[0060] Of course, in other examples, it can also be set that when the coil is energized, the auxiliary moving contact body 31 and the auxiliary stationary contact 2 are closed. When the coil is not energized, as the armature 41 moves toward the magnetic conductor 6, the connecting part 33 drives the auxiliary moving contact body 31 to move away from the auxiliary stationary contact 2, so that the auxiliary moving contact body 31 and the auxiliary stationary contact 2 are separated.

[0061] When the auxiliary movable contact 3 includes an auxiliary movable contact body 31, the auxiliary movable contact body 31 is placed inside the protective box 1. Due to the presence of the protective box 1, most foreign objects are blocked outside the protective box 1, and the probability of foreign objects entering the protective box 1 is small. Placing the auxiliary movable contact body 31, which is used to contact the auxiliary stationary contact 2, inside the protective box 1 can effectively reduce the risk of the auxiliary movable contact body 31 coming into contact with foreign objects, and reduce the risk that the auxiliary movable contact body 31 cannot close or separate smoothly from the auxiliary stationary contact 2 due to foreign object contamination. When the protective shell 12 has a groove, the clearance opening 122 is formed on the side wall of the groove.

[0062] In some embodiments, see Figure 1 , Figure 2 and Figure 11Furthermore, a seatbelt locking device is provided, which is used in conjunction with a seatbelt retractor. The seatbelt locking device includes a ratchet 100, a locking member 10, and an electromagnet mechanism as described in any of the above embodiments. The ratchet 100 is disposed on one side of the electromagnet mechanism. One end of the locking member 10 is connected to the driving member 4 of the electromagnet mechanism, and the other end is used to engage with the ratchet teeth 101 on the ratchet 100. It is understood that the ratchet 100 is connected to the seatbelt retractor, and the rotation of the ratchet 100 can control the operation of the seatbelt retractor. In this seatbelt locking device, since the auxiliary monitoring component in the electromagnet mechanism has a protective box 1, the auxiliary moving contact 3 and the auxiliary driving member 4 are disposed inside the protective box 1. The protective box 1 prevents foreign objects from entering the interior of the protective box 1, preventing foreign objects from contaminating the auxiliary stationary contact 2 and the auxiliary moving contact 3. This reduces the risk of the auxiliary monitoring component failing due to foreign object contamination, thereby improving the reliability of the seatbelt locking device.

[0063] When the active member 4 includes an elastic member and an armature 41, the locking member 10 is connected to the armature 41 and the locking member 10 and the armature 41 are integrally formed, so that the locking member 10 is part of the armature 41, reducing the risk of the locking member 10 falling off the armature 41.

[0064] The technical features of the above embodiments can be combined in any way. For the sake of brevity, 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, they should be considered to be within the scope of this specification.

[0065] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An electromagnet mechanism, characterized in that, include: The main body includes an electromagnetic component and an active member that can be attracted by the electromagnetic component, at least a portion of which can move toward or away from the electromagnetic component. as well as The auxiliary monitoring section is located on one side of the electromagnetic component. The auxiliary monitoring section includes a protective box and an auxiliary monitoring component. The auxiliary monitoring component includes an auxiliary stationary contact and an auxiliary moving contact, both located inside the protective box. The auxiliary moving contact can move towards or away from the auxiliary stationary contact. A portion of the auxiliary moving contact extends outside the protective box. When the active component moves towards the electromagnetic component, it can drive the portion of the auxiliary moving contact extending outside the protective box to move the auxiliary moving contact until it can close or separate from the auxiliary stationary contact.

2. The electromagnet mechanism according to claim 1, characterized in that, The main body also includes a yoke plate. The electromagnetic component includes a coil assembly and a magnetic conductor disposed in the coil assembly. The coil assembly includes a coil frame and a coil. The coil frame includes a winding drum and a first flange disposed at one axial end of the winding drum. The protective box is located on one side of the first flange. The magnetic conductor passes through the winding drum. The yoke plate is disposed on one side of the winding drum. One end of the driving member is connected to the yoke plate, and the other end is located on one side of the first flange. The end of the driving member away from the yoke plate can move towards or away from the magnetic conductor. The protective box is connected to the first flange.

3. The electromagnet mechanism according to claim 2, characterized in that, The protective box includes a support base and a protective shell. The support base is connected to the first flange. The protective shell is detachably disposed on one side of the support base. A cavity is formed between the support base and the protective shell. The auxiliary stationary contact is disposed in the cavity, and a portion of the auxiliary moving contact is disposed in the cavity.

4. The electromagnet mechanism according to claim 3, characterized in that, The support includes a base body and a first snap-fit ​​protrusion protruding from the base body, the first snap-fit ​​protrusion being snapped into the protective shell. And / or, the protective shell includes a shell body and a second snap-fit ​​protrusion protruding from the shell body, the second snap-fit ​​protrusion snapping into the support base.

5. The electromagnet mechanism according to claim 3, characterized in that, The support base and the first flange are an integral structure.

6. The electromagnet mechanism according to claim 3, characterized in that, The auxiliary monitoring section also includes an auxiliary static lead-out terminal and an auxiliary dynamic lead-out terminal connected to the support base. The auxiliary static lead-out terminal is connected to the auxiliary static contact, and the auxiliary dynamic lead-out terminal is connected to the auxiliary dynamic contact. The end of the auxiliary static lead-out terminal away from the auxiliary static contact and the end of the auxiliary dynamic lead-out terminal away from the auxiliary dynamic contact both extend outside the protective box.

7. The electromagnet mechanism according to claim 6, characterized in that, The support base includes a base body and a first fixing part and a second fixing part, both protruding from the base body. The base body is disposed on one side of the protective shell. The first fixing part and the second fixing part are both located in the cavity. The auxiliary static contact is connected to the first fixing part, and the auxiliary dynamic lead-out terminal is connected to the second fixing part.

8. The electromagnet mechanism according to claim 7, characterized in that, The base body is provided with a first limiting groove and a second limiting groove spaced apart from the first limiting groove. Both the first limiting groove and the second limiting groove are connected to the inside and outside of the protective box. The end of the auxiliary stationary lead-out terminal away from the auxiliary stationary contact passes through the first limiting groove and extends to the outside of the protective box. The end of the auxiliary movable lead-out terminal away from the auxiliary movable contact passes through the second limiting groove and extends to the outside of the protective box. The protective shell abuts against the side of the auxiliary stationary lead-out terminal facing the opening of the first limiting groove and the side of the auxiliary movable lead-out terminal facing the opening of the second limiting groove.

9. The electromagnet mechanism according to any one of claims 1 to 8, characterized in that, The auxiliary moving contact includes an auxiliary moving contact body for contacting the auxiliary stationary contact and a pressing part for being pressed by the active member. The auxiliary moving contact body is located inside the protective box, and the protective box is provided with a clearance opening. One end of the pressing part is connected to the auxiliary moving contact body, and the other end is used to contact the active member. The end of the pressing part away from the auxiliary moving contact body passes through the clearance opening and extends to the outside of the protective box.

10. The electromagnet mechanism according to any one of claims 1 to 8, characterized in that, The auxiliary moving contact includes an auxiliary moving contact body for contacting the auxiliary stationary contact and a connecting part connected to the active contact. The auxiliary moving contact body is disposed inside the protective box. The protective box is provided with a clearance opening. The end of the connecting part away from the active contact passes through the clearance opening and extends into the interior of the protective box.

11. A seatbelt locking device, characterized in that, The device includes a ratchet, a locking element, and an electromagnet mechanism as described in any one of claims 1 to 10. The ratchet is disposed on one side of the electromagnet mechanism, one end of the locking element is connected to the driving element of the electromagnet mechanism, and the other end is used to engage with the ratchet teeth on the ratchet.

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