Safety belt alarm device

Abstract

The utility model relates to a safety belt alarm device. The safety belt alarm device comprises a main shell, a conductive assembly installed on the main shell and a shifting fork piece rotationally installed on the main shell. The conductive assembly comprises a first contact piece, a second contact piece and a third contact piece. The first contact piece is provided with an elastic triggering part, and the second contact piece is provided with a receiving part for the triggering part to abut against; a first resistor is connected between the second contact piece and the third contact piece; a second resistor is connected between the first contact piece and the third contact piece; the shifting fork sheet is provided with a driving part for driving the triggering part to bend; the shifting fork piece is provided with a first rotating station and a second rotating station through rotation, and when the shifting fork piece is located at the first rotating station, the triggering part is separated from the receiving part; when the shifting fork piece is located at the second rotating station, the triggering part abuts against the receiving part. The application has the effect of reducing the risk of damage to automobile elements caused by instantaneous current.

Description

Technical Field

[0001] This application relates to the field of vehicle safety technology, and in particular to a seat belt alarm device. Background Technology

[0002] A seatbelt warning system is a vehicle safety system used to remind drivers and passengers to fasten their seatbelts to reduce the risk of injury in traffic accidents. A seatbelt warning system includes a seat pressure sensor located under the seat, a seatbelt buckle sensor built into the seatbelt slot, an electronic control unit (ECU) for receiving sensor signals, and an alarm actuator electrically connected to the ECU. With the widespread use of electric vehicles today, higher standards of electrical safety are required for the seatbelt warning system's circuitry.

[0003] In existing technology, seatbelt buckle sensors typically include a signal output interface electrically connected to an electronic control unit (ECU), two metal contacts connected in series with the signal output interface, and a fork rotatably mounted on the seatbelt buckle to drive the metal contacts to move. When the seatbelt is not fastened, the two metal contacts are in a contact / separation state, causing the circuit inside the sensor to be connected / disconnected. The ECU detects a high / low level and determines that the seatbelt is not fastened. When the seatbelt is inserted into the seatbelt buckle, the seatbelt tongue drives the fork to rotate, thereby causing the two metal contacts to separate / contact. The ECU detects the level change and determines that the seatbelt is fastened, thus stopping the alarm.

[0004] Regarding the aforementioned technologies, the inventors believe that the circuit generates a large instantaneous current when the seat belt is plugged in or unplugged, which can damage automotive components. Utility Model Content

[0005] In order to reduce the risk of damage to automotive components caused by instantaneous current, this application provides a seat belt alarm device.

[0006] The seatbelt alarm device provided in this application adopts the following technical solution:

[0007] A seatbelt alarm device includes a main housing, a conductive component mounted on the main housing, and a fork rotatably mounted on the main housing. The conductive component includes a first contact, a second contact, and a third contact. The first contact has a resilient trigger portion, and the second contact is located on one side of the first contact and has a receiving portion for the trigger portion to abut against. A first resistor is connected between the second contact and the third contact. A second resistor is connected between the first contact and the third contact. The fork has a driving portion that abuts against the top of the first contact and drives the trigger portion to bend. The fork is rotated to have a first rotation position and a second rotation position. When the fork is in the first rotation position, the trigger portion and the receiving portion are separated. When the fork is in the second rotation position, the trigger portion and the receiving portion abut against each other.

[0008] By adopting the above technical solution, when the passenger is not wearing a seat belt, the shift fork is in the first rotating position, the trigger part of the first contact and the receiving part of the second contact are separated, and the first contact, the second resistor and the third contact form a first circuit with the electronic control unit and output a current signal to the electronic control system; when the passenger is wearing a seat belt, the shift fork is in the second rotating position, and under the drive of the shift fork drive part, the trigger part of the first contact and the receiving part of the second contact abut against each other, and the first contact, the second contact, the first resistor and the third contact form a second circuit in parallel with the first circuit, thereby increasing the output current. The output current signal can assist the electronic control system in determining whether the passenger is wearing a seat belt; the setting of the first resistor and the second resistor helps to reduce the risk of damage to the vehicle components caused by the instantaneous current generated in the internal circuit of the alarm device when the passenger pulls out the seat belt.

[0009] Optionally, the second contact includes a second fixing part and a second elastic part connected between the second fixing part and the receiving part. The second elastic part causes the receiving part to always have a tendency to fold towards the trigger part. The main housing is provided with a first limiting block on the side of the receiving part near the trigger part for the receiving part to abut against.

[0010] By adopting the above technical solution, the specific structure of the second contact piece is disclosed. The setting of the second fixing part realizes the fixing of the second contact piece in the main housing. The setting of the second elastic part and the first limiting block makes the receiving part always tend to fold towards the trigger part and abut against the first limiting block under the drive of the second elastic part.

[0011] Optionally, the trigger portion includes a trigger tab that bends and protrudes toward the receiving portion and is used to abut against the receiving portion, and an abutment tab connected to the trigger tab and used to be abutted by the driving portion.

[0012] By adopting the above technical solution, the specific structure of the trigger part is disclosed. When the driving part abuts against the abutting piece, the first contact piece bends toward the receiving part, so that the trigger tab located below the abutting piece abuts against the receiving part of the second contact piece.

[0013] Optionally, the driving part has a driving protrusion on the side facing the first contact piece, and the abutment piece has a first groove for engaging with the driving protrusion.

[0014] By adopting the above technical solution, a driving protrusion is provided on the side of the driving part facing the trigger part, and a first groove is opened on the abutment piece of the trigger part for the driving protrusion to engage, so that the fit between the driving part and the trigger part is tighter, which helps to improve the accuracy of the driving part driving the trigger part to abut against the receiving part.

[0015] Optionally, the lower end of the first contact piece has a first fixing part; the main housing is provided with a limiting gap for arranging the lower end of the first contact piece.

[0016] By adopting the above technical solution, a limiting gap is provided in the main housing for the lower end of the first contact piece to be arranged, which realizes that the first fixing part of the first contact piece is snapped into the limiting gap of the main housing, which helps to improve the installation firmness of the first contact piece.

[0017] Optionally, the first resistor includes a first resistor body, a first pin disposed at one end of the first resistor body and connected to the second contact, and a second pin disposed at the other end of the first resistor body and connected to the third contact; the second resistor includes a second resistor body, a third pin disposed at one end of the second resistor body and connected to the first contact, and a fourth pin disposed at the other end of the second resistor body and connected to the third contact; the first resistor body is disposed between the second contact and the third contact; the second resistor body is disposed on the side of the third contact facing away from the second contact.

[0018] By adopting the above technical solution, the specific structures of the first resistor and the second resistor are disclosed. A first pin and a second pin are respectively set at both ends of the first resistor, and a third pin and a fourth pin are respectively set at both ends of the second resistor, thereby realizing the series connection between the first resistor and the second and third contacts, and between the second resistor and the first and third contacts. The first resistor is arranged between the second and third contacts, and the second resistor is arranged on the side of the third contact away from the second contact, making the layout of the components in the main housing more compact.

[0019] Optionally, the main housing is provided with a horizontal pad for horizontally arranging the third needle.

[0020] By adopting the above technical solution, the horizontal pad makes the third pin more securely positioned in the main housing, which helps to ensure the stability of the circuit and thus helps to reduce the risk of damage to automotive components by instantaneous current.

[0021] Optionally, the main housing has a slot for locking the seat belt tongue, and the shift fork further includes a rotating part connected to the drive part and rotatably mounted on the main housing, and a force-receiving part connected to the rotating part and oscillatingly arranged in the slot.

[0022] By adopting the above technical solution, when the seat belt tongue is inserted into the insertion slot, the tongue abuts against the force-receiving part of the shift fork, causing the force-receiving part to rotate along the rotation axis of the rotating part, thereby realizing that the drive part located in the main housing rotates coaxially and drives the trigger part to abut against the receiving part.

[0023] Optionally, the main housing includes a first arrangement slot for arranging the conductive components and a top cover for closing the first arrangement slot.

[0024] By adopting the above technical solution, the arrangement of the first arrangement slot and the top cover enables the conductive components, the first resistor and the second resistor to be arranged inside the main housing, thereby helping to improve the safety of the seat belt alarm device.

[0025] Optionally, the receiving portion has an arcuate surface that protrudes towards the trigger portion.

[0026] By adopting the above technical solution, the arc-shaped surface helps to improve the structural strength of the trigger part, so that the trigger part is not easily deformed under long-term use.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. When the passenger is not wearing a seatbelt, the trigger part of the first contact and the receiving part of the second contact are separated. The first contact, the second resistor, and the third contact form a first circuit with the electronic control unit and output a current signal to the electronic control system. When the passenger is wearing a seatbelt, the shift fork is in the second rotating position. Driven by the shift fork drive, the trigger part of the first contact and the receiving part of the second contact come into contact. The first contact, the second contact, the first resistor, and the third contact form a second circuit in parallel with the first circuit, thereby increasing the output current. The output current signal can assist the electronic control system in determining whether the passenger is wearing a seatbelt. The setting of the first resistor and the second resistor helps to reduce the risk of damage to automotive components caused by the instantaneous current generated in the internal circuit of the alarm device when the passenger inserts or removes the seatbelt.

[0029] 2. By providing a second fixing part, the second contact piece is fixed inside the main housing; by providing a second elastic part and a first limiting block, the receiving part, driven by the second elastic part, always tends to fold towards the trigger part and abut against the first limiting block;

[0030] 3. By setting a trigger flap and an abutment piece connected to the trigger flap, when the driving part abuts against the abutment piece, the first contact piece will bend toward the receiving part, thereby causing the trigger flap located below the abutment piece to abut against the receiving part of the second contact piece. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the seatbelt alarm device in this embodiment.

[0032] Figure 2 This is a schematic diagram of the main housing within the first arrangement slot in this embodiment.

[0033] Figure 3 This is a schematic diagram illustrating the interaction between the toggle fork and the first contact piece, and between the first contact piece and the second contact piece in this embodiment.

[0034] Figure 4 yes Figure 2 A schematic diagram showing the fit between the limiting gap at point A and the first connecting part.

[0035] Explanation of reference numerals in the attached drawings: 1. Main housing; 11. First arrangement slot; 12. Insertion slot; 13. Top cover; 14. First limiting block; 15. First limiting assembly; 151. First limiting plate; 152. Second limiting plate; 153. Third limiting plate; 154. Limiting gap; 16. Horizontal pad; 21. First contact piece; 211. First fixing part; 2111. First connecting part; 212. Trigger part; 2121. Trigger flap; 2122. Abutment piece; 2123. First groove; 213. Third arrangement hole; 22. Second contact piece; 2 21. Second fixing part; 222. Second elastic part; 223. Receiving part; 2231. Arc-shaped surface; 224. First arrangement hole; 23. Third contact piece; 231. Third connecting part; 232. Second arrangement hole; 233. Fourth arrangement hole; 3. Shift fork; 31. Rotating part; 32. Force-receiving part; 33. Driving part; 331. Driving protrusion; 4. First resistor; 41. First resistor body; 42. First pin; 43. Second pin; 5. Second resistor; 51. Second resistor body; 52. Third pin; 53. Fourth pin. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0037] This application discloses a seatbelt alarm device. (Refer to...) Figure 1 and Figure 2 The seatbelt alarm device includes a main housing 1, a conductive component mounted on the main housing 1, and a fork 3 rotatably mounted on the main housing 1. The main housing 1 has a first arrangement slot 11 located on the front side for arranging the conductive component, a insertion slot 12 located on the rear side for locking the seatbelt tongue, and a top cover 13 for covering the first arrangement slot 11. The conductive component includes a first contact 21, a second contact 22, and a third contact 23 arranged parallel to each other within the first arrangement slot 11. A first resistor 4 is connected between the second contact 22 and the third contact 23, and a second resistor 5 is connected between the first contact 21 and the third contact 23. In this embodiment, both the main housing 1 and the fork 3 are made of insulating material. The first contact 21, the second contact 22, and the third contact 23 are all highly conductive metal contacts.

[0038] Reference Figure 2 and Figure 3 The first contact piece 21 includes a first fixing part 211 and a trigger part 212 connected to the upper end of the first fixing part 211. The trigger part 212 includes a trigger flap 2121 that bends and protrudes towards the second contact piece 22 and an abutment piece 2122 connected to the upper end of the trigger flap 2121 for the fork piece 3 to abut against. The fork piece 3 includes a rotating part 31 rotatably mounted on the main housing 1, a force-receiving part 32 connected to the rotating part 31 and oscillatingly arranged in the insertion groove 12, and a driving part 33 connected to the rotating part 31 and abutting against the upper end of the first contact piece 21. The driving part 33 has a driving protrusion 331 on the side facing the first contact piece 21, and the abutment piece 2122 has a first groove 2123 that mates with the driving protrusion 331.

[0039] Reference Figure 2 and Figure 3 The second contact piece 22 is located on one side of the first contact piece 21. The second contact piece 22 includes a second fixing part 221, a second elastic part 222, and a receiving part 223. The lower end of the second elastic part 222 is connected to the second fixing part 221, and the upper end of the second elastic part 222 is connected to the receiving part 223, causing the receiving part 223 to always have a tendency to fold towards the trigger part 212. The upper end of the receiving part 223 has an arc-shaped surface 2231 that protrudes towards the trigger piece 2121. The main housing 1 is provided with a first limiting block 14 in the first arrangement groove 11 for the side of the receiving part 223 facing the trigger part 212 to abut.

[0040] Reference Figure 3The shift fork 3 has a first rotating position and a second rotating position after rotation. When the shift fork 3 is in the first rotating position, the trigger part 212 of the first contact piece 21 and the receiving part 223 of the second contact piece 22 are separated. When the shift fork 3 is in the second rotating position, the force-receiving part 32 rotates along the rotation axis of the rotating part 31 under the push of the seat belt tongue and drives the drive part 33 to rotate. The trigger part 212 of the first contact piece 21 abuts against the receiving part 223 of the second contact piece 22 under the drive of the drive part 33.

[0041] Reference Figure 4 The lower end of the first fixing part 211 has a first connecting part 2111 perpendicular to the arrangement direction of the first fixing part 211 and connected to the electronic control unit of the vehicle. The main housing 1 is provided with a first limiting assembly 15 for limiting the first fixing part 211 at the first fixing part 211. The first limiting assembly 15 includes a first limiting plate 151 located on the left side of the first fixing part 211, a second limiting plate 152 located on the right side of the first fixing part 211, and a third limiting plate 153 penetrating through the first connecting part 2111. A limiting gap 154 ​​is formed between the first fixing plate, the second fixing plate, and the third fixing plate. In this embodiment, the first limiting assembly 15 is made of the same insulating material as the main housing 1.

[0042] Reference Figure 2 The third contact 23 is located on the side of the second contact 22 away from the first contact 21. The lower end of the third contact 23 has a third connection portion 231 that is perpendicular to the arrangement direction of the third contact 23 and connected to the electronic control unit of the vehicle.

[0043] Reference Figure 2 and Figure 3 A first resistor 4 is disposed between the second contact 22 and the third contact 23. The first resistor 4 includes a first resistor body 41, a first pin 42 disposed at one end of the first resistor body 41 and connected to the second contact 22, and a second pin 43 disposed at the other end of the first resistor body 41 and connected to the third contact 23. The surface of the second contact 22 has a first arrangement hole 224 for soldering the first pin 42, and the surface of the third contact 23 has a second arrangement hole 232 for soldering the second pin 43.

[0044] Reference Figure 2 and Figure 3The second resistor 5 includes a second resistor body 51 disposed on the side of the third contact 23 facing away from the second contact 22, a third pin 52 disposed at one end of the second resistor body 51 and connected to the first contact 21, and a fourth pin 53 disposed at the other end of the second resistor body 51 and connected to the third contact 23. The surface of the first contact 21 has a third arrangement hole 213 for soldering the third pin 52, and the surface of the third contact 23 has a fourth arrangement hole 233 for soldering the fourth pin 53. A horizontal pad 16 for horizontally arranging the third pin 52 is provided at the bottom of the first arrangement groove 11 in the main housing 1.

[0045] The implementation principle of a seat belt alarm device according to an embodiment of this application is as follows: When the passenger is not wearing a seat belt, the shift fork 3 is in the first rotating position, the trigger part 212 and the receiving part 223 are separated, the first contact 21, the second resistor 5 and the third contact 23 form a first circuit with the electronic control unit, and output a current signal to the electronic control system; when the passenger has fastened the seat belt, the seat belt tongue is inserted into the insertion slot 12 and causes the force-receiving part 32 of the shift fork 3 to rotate, the shift fork 3 is in the second rotating position, and under the drive of the shift fork 3 driving part 33, the trigger part 212 and the receiving part 223 abut against each other, the first contact 21, the second contact 22, the first resistor 4 and the third contact 23 form a second circuit in parallel with the first circuit, thereby increasing the output current. The output current signal can assist the electronic control system in judging whether the passenger has fastened the seat belt; the setting of the first resistor 4 and the second resistor 5 helps to reduce the risk of damage to the vehicle components caused by the instantaneous current generated in the internal circuit of the alarm device when the passenger inserts or removes the seat belt.

[0046] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A seatbelt alarm device, characterized in that, The device includes a main housing (1), a conductive assembly mounted on the main housing (1), and a fork (3) rotatably mounted on the main housing (1); the conductive assembly includes a first contact (21), a second contact (22), and a third contact (23); the first contact (21) has a resilient trigger portion (212), the second contact (22) is located on one side of the first contact (21) and has a receiving portion (223) for the trigger portion (212) to abut against; a first resistor (4) is connected between the second contact (22) and the third contact (23); A second resistor (5) is connected between the first contact (21) and the third contact (23); the fork (3) has a driving part (33) that abuts against the top of the first contact (21) and drives the trigger part (212) to bend; the fork (3) has a first rotation position and a second rotation position after rotation. When the fork (3) is in the first rotation position, the trigger part (212) and the receiving part (223) are separated; when the fork (3) is in the second rotation position, the trigger part (212) and the receiving part (223) abut against each other.

2. A seatbelt alarm device according to claim 1, characterized in that, The second contact (22) includes a second fixing part (221) and a second elastic part (222) connected between the second fixing part (221) and the receiving part (223). The second elastic part (222) causes the receiving part (223) to always have a tendency to fold towards the trigger part (212). The main housing (1) is provided with a first limiting block (14) on the side of the receiving part (223) near the trigger part (212) for the receiving part (223) to abut against.

3. A seatbelt alarm device according to claim 1, characterized in that, The triggering part (212) includes a trigger tab (2121) that bends and protrudes toward the receiving part (223) and is used to abut against the receiving part (223), and an abutting tab (2122) connected to the trigger tab (2121) and used to be abutted by the driving part (33).

4. A seatbelt alarm device according to claim 3, characterized in that, The drive unit (33) has a drive protrusion (331) on the side facing the first contact piece (21), and the abutment piece (2122) has a first groove (2123) for engaging with the drive protrusion (331).

5. A seatbelt alarm device according to claim 3, characterized in that, The lower end of the first contact piece (21) has a first fixing part (211); the main housing (1) is provided with a limiting gap (154) for arranging the lower end of the first contact piece (21).

6. A seatbelt alarm device according to claim 1, characterized in that, The first resistor (4) includes a first resistor (4) body, a first pin (42) disposed at one end of the first resistor (4) body and connected to the second contact (22), and a second pin (43) disposed at the other end of the first resistor (4) body and connected to the third contact (23); the second resistor (5) includes a second resistor (5) body, a third pin (52) disposed at one end of the second resistor (5) body and connected to the first contact (21), and a fourth pin (53) disposed at the other end of the second resistor (5) body and connected to the third contact (23); the first resistor (4) body is arranged between the second contact (22) and the third contact (23); the second resistor (5) body is arranged on the side of the third contact (23) facing away from the second contact (22).

7. A seatbelt alarm device according to claim 6, characterized in that, The main housing (1) is provided with a horizontal pad (16) for the horizontal arrangement of the third lead pin (52).

8. A seatbelt alarm device according to claim 1, characterized in that, The main housing (1) has a slot (12) for locking the seat belt tongue. The shift fork (3) also includes a rotating part (31) connected to the drive part (33) and rotatably mounted on the main housing (1) and a force-receiving part (32) connected to the rotating part (31) and swingably arranged in the slot (12).

9. A seatbelt alarm device according to claim 1, characterized in that, The main housing (1) includes a first arrangement slot (11) for arranging the conductive components and a top cover (13) for covering the first arrangement slot (11).

10. A seatbelt alarm device according to claim 1, characterized in that, The receiving part (223) has an arcuate surface (2231) that protrudes towards the trigger part (212).

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