Hall switch device of safety belt lock catch

Abstract

The utility model discloses a Hall switch device for a safety belt lock catch, and aims to solve the problems of signal abnormity caused by poor contact between a contact and a normally closed terminal of an existing safety belt switch assembly and failure state distinguishing incapability. The belt buckle comprises a belt buckle body frame and a spring bolt plate, a magnet support with a magnet is clamped to the end of a sliding block, a circuit board integrated with a Hall element is clamped to the belt buckle body frame through a switch support, and when a magnetic object approaches the Hall element of a switch, the Hall element can output an electric signal corresponding to the magnetic flux density; the non-contact detection mode is adopted, the Hall element and the magnetic element are both integrated in the belt buckle shell, the non-contact type belt buckle has the advantages of being simple in structure, convenient to use, free of contact, long in service life, low in power consumption, high in protection level and the like, the reliability and durability of a system are improved, meanwhile, the switch outputs high and low current signals, and the safety of the system is improved. And fault signals of the line can be obviously distinguished.

Description

Technical Field

[0001] This application relates to the field of switch technology, specifically to a seatbelt buckle Hall switch device. Background Technology

[0002] Seat belts are the main occupant restraint and protection device in passive safety systems. In traffic accidents, wearing seat belts can effectively reduce the occupant mortality rate and protect occupant safety.

[0003] The existing seat belt switching assembly is a mechanical contact type on / off switch, such as Figure 1 As shown, it includes a frame 13, a locking tongue plate 14, a switch bracket 11, a common terminal 1, a normally open terminal 2, a normally closed terminal 3, and a base 4. When the locking tongue plate 14 is inserted into the buckle body frame 13, the switch is in the off state; when the locking tongue plate 14 is ejected from the buckle body frame 13, the switch is in the on state. Its working principle is as follows: the switch is a normally closed switch. When the locking tongue plate 14 is inserted into the buckle body frame 13, it drives the slider 12 to move. The pressing part of the slider 12 contacts the switch spring 10 and applies a compressive force F to the spring 10. Then, the spring 10 presses down the pressure handle 9 on the micro switch through the compression reaction force. The pressure handle 9 drives the guide core 6 to press down together, driving the spring 7 to deform and causing the contact 8 at the end of the spring 7 to separate from the normally closed terminal 3, completing the switch opening action and interrupting the circuit. Conversely, after unlocking, slider 12 causes the latch plate 14 to pop out of the buckle body frame 13, the end of slider 12 moves away from spring 10, and the pressure handle 9 and guide core 6 are reset under the elastic reaction force of spring 7, and the end contact 8 of spring 7 contacts the normally closed terminal 3. The defect of this existing switch assembly is as follows:

[0004] (1) The switch structure is an open structure. Figure 1 There is a gap between the middle conductor core 6 and the upper cover 5. Water, dust and powdery foreign objects can enter the switch through the gap, contaminating the contact 8. This causes poor contact between the contact 8 and the normally closed terminal 3, preventing power from being supplied and resulting in abnormal signal.

[0005] (2) The switch is turned on and off by the metal contact 8. The moment of switching on and off, an electric spark will be generated, which may cause contact corrosion.

[0006] (3) When there is a circuit fault, the short circuit and open circuit signals cannot be distinguished from the on / off signals of the product, the fault status cannot be distinguished from the on / off status of the switch, and the fault status cannot be fed back to the vehicle. Utility Model Content

[0007] Therefore, this application provides a seat belt buckle Hall switch device to solve the problems of signal abnormalities caused by poor contact between the contacts and normally closed terminals in existing seat belt switch assemblies, as well as the inability to distinguish fault states.

[0008] To achieve the above objectives, this application provides the following technical solution:

[0009] A seatbelt buckle Hall effect switch device includes: a buckle main frame and a latch plate inserted into the buckle main frame. A slider is provided at one end of the buckle main frame near the insertion direction of the latch plate. The slider moves along the length direction of the buckle main frame, and a magnet is provided at one end of the slider. A Hall effect switch assembly is provided on the same side of the buckle main frame corresponding to the magnet. The Hall effect switch assembly includes a circuit board and a Hall element disposed on the circuit board. The circuit board is connected to an external control device or power supply device through wires.

[0010] Optionally, it also includes a switch bracket, which is connected to the side of the buckle main frame, and the switch bracket has a first slot inside for engaging the circuit board.

[0011] Optionally, the circuit board and Hall element are sealed inside the switch bracket by potting.

[0012] Optionally, the switch bracket is snapped into the buckle main frame.

[0013] Optionally, a cover is also included, which is disposed on the outside of the switch bracket for sealing the circuit board and the Hall element.

[0014] Optionally, the magnet is provided with a magnet bracket on its exterior for fixing the magnet.

[0015] Optionally, the magnet holder has a second slot inside for engaging the magnet.

[0016] Optionally, the magnet bracket is further provided with a third slot for engaging the slider.

[0017] Optionally, the magnet holder is integrally formed with the slider.

[0018] Optionally, the bottom of the switch bracket is provided with a mounting groove for fixing the wire.

[0019] Compared with the prior art, this application has at least the following beneficial effects:

[0020] 1. Based on further analysis and research of existing technical problems, this application provides a seat belt buckle Hall switch device. A magnet bracket with a magnet is attached to the end of a slider, and a circuit board integrating a Hall element is attached to the buckle's main frame via a switch bracket. When a magnetic object (magnet) approaches the Hall element (magnetic detection unit) of the switch, the Hall element outputs an electrical signal corresponding to the magnitude of the magnetic flux density. This signal is transmitted to the vehicle's control system via the circuit board and wires to determine whether the seat belt is correctly worn. Based on the Hall principle, this application integrates both the Hall element and the magnetic element within the buckle housing, resulting in a simple structure, ease of use, contactless operation, long service life, low power consumption, and high protection level. The non-contact detection method improves the system's reliability and durability. Furthermore, the switch outputs high and low current signals, which are clearly distinguishable from circuit fault signals, allowing for timely and accurate feedback to the vehicle control system on different operating conditions such as seat belt fastening, seat belt not fastened, and malfunction.

[0021] 2. In this application, the Hall element is connected to the switch bracket via a circuit board and then sealed with a cover or potting compound to prevent the internal circuit board components from being invaded by external foreign objects and liquids, thereby effectively avoiding the influence of dirt and foreign objects on the switch.

[0022] 3. The slider and magnet bracket of this application are integrated into one design, and the magnet is directly snapped into the magnet bracket at the end of the slider, which simplifies the assembly process, makes the structure more stable, and has higher reliability.

[0023] 4. The bottom of the switch bracket of this application is provided with a mounting groove for fixing the wires, so as to prevent the wires from loosening due to external force or vibration, thereby improving the stability of the entire switch assembly. Attached Figure Description

[0024] To more intuitively illustrate the prior art and this application, exemplary drawings are provided below. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing this application; for example, based on the technical concept disclosed in this application and the exemplary drawings, those skilled in the art are able to easily make conventional adjustments or further optimizations to the addition / reduction / classification, specific shapes, positional relationships, connection methods, size ratios, etc. of certain units (components).

[0025] Figure 1 A schematic diagram of the structure of a switching assembly provided by the prior art;

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Common terminal; 2. Normally open terminal; 3. Normally closed terminal; 4. Base; 5. Top cover; 6. Guide core; 7. Spring; 8. Contact; 9. Pressure handle; 10. Spring; 11. Switch bracket; 12. Slider; 13. Frame; 14. Locking tongue plate.

[0028] Figure 2 A schematic diagram of the structure of a Hall effect-based magnetoelectric conversion device provided in one embodiment of this application. Figure 1 ;

[0029] Figure 3 A schematic diagram of the structure of a Hall effect-based magnetoelectric conversion device provided in one embodiment of this application. Figure 2 ;

[0030] Figure 4 for Figure 2 A partial schematic diagram of the contact point between the locking tongue plate and the slider;

[0031] Figure 5 for Figure 2 A schematic diagram of the back of the main frame with buckle, slider, and magnet bracket;

[0032] Figure 6 for Figure 2 Schematic diagram of the middle slider, magnet, and magnet support Figure 1 ;

[0033] Figure 7 for Figure 2 Schematic diagram of the middle slider, magnet, and magnet support Figure 2 ;

[0034] Figure 8 for Figure 6 Exploded view of the middle slider and magnet support;

[0035] Figure 9 for Figure 2 A schematic diagram of the switch bracket and the main frame with buckle;

[0036] Figure 10 for Figure 2 Schematic diagram of the Hall effect switch assembly Figure 1 ;

[0037] Figure 11 for Figure 2 Schematic diagram of the Hall effect switch assembly Figure 2 ;

[0038] Figure 12 for Figure 2 Schematic diagram of the Hall effect switch assembly Figure 3 ;

[0039] Figure 13 for Figure 10A schematic diagram of the Hall element, circuit board, and wires;

[0040] Figure 14 for Figure 10 A schematic diagram of the switch bracket.

[0041] Explanation of reference numerals in the attached figures:

[0042] 1. Magnet; 2. Magnet bracket; 201. Third slot; 3. Slider; 4. Hall element; 5. Circuit board; 6. Wire; 7. Switch bracket; 701. First slot; 702. Mounting slot; 8. Buckle main frame; 9. Locking tongue plate. Detailed Implementation

[0043] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] In the description of this application: unless otherwise stated, "a plurality of" means two or more. The terms "first," "second," "third," etc., in this application are intended to distinguish the objects referred to and do not have any special meaning in terms of technical connotation (e.g., they should not be construed as an emphasis on importance or order). Expressions such as "including," "comprising," and "having" also mean "not limited to" (certain units, components, materials, steps, etc.).

[0045] The terms used in this application, such as "upper," "lower," "left," "right," and "middle," are generally used to indicate the general relative positional relationship for the purpose of intuitive understanding by referring to the accompanying drawings, and are not absolute limitations on the positional relationship in the actual product.

[0046] One embodiment of this application provides a seatbelt buckle Hall switch device, such as... Figures 2-14 As shown, it includes: a buckle main frame 8 and a locking tongue plate 9 inserted into the buckle main frame 8. A slider 3 is provided at one end of the buckle main frame 8 near the insertion direction of the locking tongue plate 9. The slider 3 can move along the length direction of the buckle main frame 8.

[0047] A magnet 1 is provided at one end of the slider 3, and a Hall switch assembly is provided on the same side of the buckle main frame 8 corresponding to the magnet 1. The Hall switch assembly includes a circuit board 5 and a Hall element 4 disposed on the circuit board 5. The circuit board 5 is connected to an external control device or power supply device through a wire 6.

[0048] Preferably, it also includes a switch bracket 7, which is connected to the side of the buckle-type main frame 8 by a snap-fit ​​connection; the switch bracket 7 has a first slot 701 inside (see...). Figure 14 ), used to attach circuit board 5.

[0049] More preferably, the circuit board 5, the Hall element 4, and the connected switching circuit are sealed inside the switch bracket 7 by potting.

[0050] Alternatively, a cover can be installed on the outside of the switch bracket 7. The cover and the switch bracket 7 form a sealed cavity to seal the circuit board 5 and Hall element 4 inside the switch bracket 7. When the Hall element 4 is snapped onto the switch bracket 7 through the circuit board 5, it is protected by the cover. The cover method prevents the internal circuit board 5 assembly from being invaded by foreign objects and liquids.

[0051] More preferably, the bottom of the switch bracket 7 is provided with a mounting groove 702 for fixing the wire 6 (see [reference]). Figure 14 This prevents the wire 6 from becoming loose due to external force or vibration, thereby improving the stability of the entire switch assembly. It also prevents safety hazards caused by poor contact or short circuit during use, effectively reducing the risk of electrical faults and facilitating installation.

[0052] Preferably, the magnet 1 is provided with a magnet bracket 2 for fixing the magnet 1 on its exterior.

[0053] More preferably, the magnet holder 2 also has a third slot 201 inside (see...). Figure 8 ), used to snap onto slider 3.

[0054] In a further preferred embodiment, the magnet bracket 2 has a second slot inside for engaging the magnet 1.

[0055] In addition, the magnet bracket 2 can also be designed as an integral part of the slider 3, and then the magnet 1 can be directly snapped into the magnet bracket 2 at the end of the slider 3.

[0056] This application uses a switch bracket 7 to be fixed to the buckle main frame 8, or the switch assembly can be fixedly assembled onto the buckle cover.

[0057] The assembly process of the above embodiment is as follows: magnet 1 is snapped onto magnet bracket 2 to form a magnet assembly, and then the magnet assembly is snapped onto the end of slider 3; Hall element 4 is integrated onto circuit board 5 and connected to external control equipment or power supply equipment through wire 6, and then circuit board 5 is snapped into switch bracket 7 and protected by potting glue or cover sealing, and a Hall switch assembly is formed; the Hall switch assembly is snapped onto the main frame 8 with buckle through switch bracket 7.

[0058] This application discloses a magnetoelectric converter switch based on the Hall effect. Its principle is that when a magnetic object approaches the Hall element 4 (magnetic detection unit) of the switch, the Hall element 4 outputs an electrical signal corresponding to the magnitude of the magnetic flux density. Specifically, when the latch plate 9 is inserted into the buckle body frame 8, it pushes the slider 3 to move, causing the magnet assembly to approach the magnetic detection unit of the Hall switch assembly. This causes the magnetic field of the magnet 1 to act on the Hall element 4, at which point the switch outputs a high current. When the buckle is unlocked, the slider 3 pops out of the latch plate 9, simultaneously causing the magnet assembly to move away from the magnetic detection unit of the Hall switch assembly, so that the Hall element 4 has no magnetic field action, at which point the switch outputs a low current.

[0059] In summary, this application attaches a magnet bracket with a magnet installed to the end of the slider, and seals the Hall element into the switch bracket through snap-fitting and potting, and then snaps it onto the buckle main frame. This allows the magnetic detection part of the switch assembly to be magnetically activated or deactivated, and the buckle state corresponds to the change in slider position, resulting in the switch outputting different circuit signals that can be clearly distinguished from circuit fault signals. Compared to existing switches, this Hall switch device has a simple structure and is easy to use. Applying a switch with features such as no contacts, long service life, low power consumption, and high protection level to the seat belt buckle can effectively avoid the influence of dirt and foreign objects on the switch, and can output feedback signals to the vehicle control system for different operating conditions such as seat belt fastening, seat belt not fastened, and fault.

[0060] The technical features of the above embodiments can be combined in any way (as long as there is no contradiction in the combination of these technical features). For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described; these embodiments not explicitly written should also be considered to be within the scope of this specification.

Claims

1. A seatbelt buckle Hall switch device, comprising: A buckle main frame and a locking tongue plate inserted into the buckle main frame are characterized in that a slider is provided at one end of the buckle main frame near the insertion direction of the locking tongue plate, the slider moves along the length direction of the buckle main frame, and a magnet is provided at one end of the slider. A Hall switch assembly is provided on the same side of the buckle main frame corresponding to the magnet. The Hall switch assembly includes a circuit board and a Hall element disposed on the circuit board. The circuit board is connected to an external control device or power supply device through a wire.

2. The seatbelt buckle Hall switch device according to claim 1, characterized in that, It also includes a switch bracket, which is connected to the side of the buckle main frame, and the switch bracket has a first slot inside for snapping the circuit board.

3. The seatbelt buckle Hall switch device according to claim 2, characterized in that, The circuit board and Hall element are sealed inside the switch bracket by potting.

4. The seatbelt buckle Hall switch device according to claim 2, characterized in that, The switch bracket is snapped into the buckle main frame.

5. The seatbelt buckle Hall switch device according to claim 2, characterized in that, It also includes a cover, which is disposed on the outside of the switch bracket and is used to seal the circuit board and the Hall element.

6. The seatbelt buckle Hall switch device according to claim 1, characterized in that, The magnet is provided with a magnet bracket on its exterior for fixing the magnet.

7. The seatbelt buckle Hall switch device according to claim 6, characterized in that, The magnet holder has a second slot inside for holding the magnet in place.

8. The seatbelt buckle Hall switch device according to claim 6, characterized in that, The magnet bracket also has a third slot inside for engaging the slider.

9. The seatbelt buckle Hall switch device according to claim 6, characterized in that, The magnet bracket is integrally formed with the slider.

10. The seatbelt buckle Hall switch device according to claim 2, characterized in that, The bottom of the switch bracket is provided with a mounting groove for fixing the wire.

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