Antistatic combined gear switch

Abstract

The invention relates to an antistatic combined gear switch which comprises a main shell, a main circuit board, a handle, a knob support, a first knob assembly and a second knob assembly, the knob support is arranged in the handle shell, the first knob assembly comprises a first support, a first circuit board and a first knob, the first support is fixedly arranged at the front end of the knob support, and the second support is fixedly arranged at the rear end of the knob support. The first circuit board is fixedly arranged on the first support, the first knob is rotationally arranged on the knob support, a connecting column is formed at the front end of the first knob, a blocking protruding ring is formed on the circumferential side face of the connecting column, a connecting protruding ring matched with the connecting column is formed on the inner wall of the handle shell, and a blocking ring groove is formed in the inner wall of the connecting protruding ring. The connecting column penetrates through the connecting convex ring and the blocking convex ring to be arranged in the blocking ring groove, and the connecting column is provided with a movable contact piece matched with the first circuit board. The anti-static combined gear switch has better anti-static performance, so that the working stability is ensured, and the driving safety is further ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive parts, and particularly to an anti-static combined shift-by-wire switch. Background Art

[0002] A combined switch is a component used to control automotive functions in automotive parts. Among them, the combined shift-by-wire switch realizes the switching of automotive gears through the swing of the handle, and several knobs are integrated on the handle to control functions such as automotive lights. Through tests, it is found that in the power-on mode test of the existing combined shift-by-wire switch, there is a phenomenon of failure and stop of work (the function returns to normal after re-powering on), resulting in potential safety hazards in the use of the combined shift-by-wire switch. After inspection, the reason for the failure of the combined shift-by-wire switch is that the static electricity inside the switch causes large fluctuations in the power supply instantaneously at the discharge point, which easily causes the microcontroller to malfunction and requires re-powering on to recover. Therefore, it is urgent to improve the anti-static performance of the combined shift-by-wire switch.

[0003] In view of the above problems, the present invention is improved. Summary of the Invention

[0004] The present invention provides an anti-static combined shift-by-wire switch, which solves the above problems existing in the prior art during use.

[0005] The technical solution of the present invention is realized as follows: An anti-static combined shift-by-wire switch includes a main housing, a main circuit board, a handle, a knob bracket, a first knob assembly, and a second knob assembly. The knob bracket is arranged inside the handle housing. The first knob assembly includes a first bracket, a first circuit board, and a first knob. The first bracket is fixedly arranged at the front end of the knob bracket. The first circuit board is fixedly arranged on the first bracket. The first knob is rotatably arranged on the knob bracket, and a connecting column is formed at the front end of the first knob. A blocking convex ring is formed on the circumferential side of the connecting column. A connecting convex ring matching the connecting column is formed on the inner wall of the handle housing. A blocking ring groove is opened on the inner wall of the connecting convex ring. The connecting column passes through the connecting convex ring, and the blocking convex ring is placed in the blocking ring groove. A moving contact piece cooperating with the first circuit board is arranged on the connecting column.

[0006] Preferably, a blocking flange surrounding the moving contact piece is formed on the end face of the connecting column.

[0007] Preferably, a blocking step is formed on the edge of the blocking flange protruding from the edge of the connecting column.

[0008] Preferably, the second knob assembly includes a second bracket, a second circuit board, and a second knob. The second bracket is disposed at the rear end of the knob bracket. The second circuit board is disposed on the second bracket. The second knob is rotatably disposed at the rear end of the knob bracket, and an installation frame penetrating the second bracket is formed at the front end of the second knob. A magnet cooperating with the Hall sensor on the second circuit board is disposed on the installation frame.

[0009] Preferably, the main housing includes a support housing made of a metal material and a wiring cover plate made of an insulating material. An insulating support frame is disposed inside the lower end of the support housing. The main circuit board is disposed on the support frame. The wiring cover plate is disposed at the lower end of the main housing to cover the main circuit board.

[0010] Preferably, a wire routing cavity penetrating the knob bracket from front to back is formed inside the knob bracket. A wire routing opening is formed at the side end of the wiring cover plate close to the handle. The wires of the first circuit board and the second circuit board penetrate into the wire routing cavity, then pass through the handle, and then pass through the wire routing opening and penetrate under the main circuit board to be connected to the main circuit board.

[0011] Preferably, at least one analog ground is provided on the main circuit board.

[0012] Preferably, the support housing and the handle are connected by a grounding wire.

[0013] Preferably, a first grounding bolt is screwed on the support housing, and a second grounding bolt is screwed on the connecting rod of the handle. Two ends of the grounding wire are respectively connected to the first grounding bolt and the second grounding bolt.

[0014] In summary, the beneficial effects of the present invention are as follows: 1. By blocking external static electricity from entering the handle interior through the gap between the first knob and the handle housing and being led to the mating part of the moving contact piece and the first circuit board, the anti-static performance of the combined shift lever switch is enhanced; 2. By blocking external static electricity from entering the handle interior through the gap between the second knob and the handle housing and being led to the mating part of the magnet and the second circuit board, the anti-static performance of the combined shift lever switch is enhanced; 3. By optimizing the wire routing path of the internal wires, additional discharge points are avoided; 4. By grounding the handle, additional discharge points are avoided; Through the above several methods, the anti-static performance of the combined shift lever switch is enhanced, large fluctuations in the power supply during operation are prevented, and the stability of the combined shift lever switch during operation is ensured, thereby ensuring driving safety. Description of the Drawings

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0016] Figure 1 Schematic exploded view of the present invention; Figure 2 Schematic cross-sectional view of the handle in the present invention; Figure 3 For Figure 2 Enlarged schematic view of part A in Figure 4 For Figure 2 Enlarged schematic view of part B in Figure 5 Schematic structural view of the first knob assembly in the present invention; Figure 6 Schematic structural view of the second knob assembly in the present invention; Figure 7 Schematic wiring diagram of the connection between the first circuit board and the second circuit board to the main circuit board in the present invention; Figure 8 Schematic structural view of the main handle, support housing and grounding wire in the present invention.

[0017] In the figure: 1, main housing; 11, support housing; 12, wiring cover plate; 121, wiring opening; 13, support frame; 2, main circuit board; 3, handle; 31, knob bracket; 311, wiring cavity; 32, connecting convex ring; 33, barrier ring groove; 34, connecting rod; 4, first knob assembly; 41, first bracket; 42, first circuit board; 43, first knob; 431, connecting column; 432, barrier convex ring; 433, barrier flange; 434, barrier step; 44, moving contact piece; 5, second knob assembly; 51, second bracket; 52, second circuit board; 53, second knob; 531, mounting frame; 54, magnet; 6, grounding wire; 7, first grounding bolt; 8, second grounding bolt. Detailed implementation manners

[0018] The following will combine the attached Figure 1-8 in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0019] After testing, the reasons for the power fluctuation of the combined stalk switch and the resulting function realization are as follows: First, external static electricity enters the inside of the handle 3 through the gap between the first knob 43 and the housing of the handle 3, causing interference when the first knob assembly 4 is turned on and discharges; Second, external static electricity enters the inside of the handle 3 through the gap between the second knob 53 and the housing of the handle 3, causing interference when the second knob assembly 5 is turned on and discharges; Third, the wires connecting the first knob assembly 4 and the second knob assembly 5, for example, inside the combined switch to the main circuit board 2 are close to the metal parts and connecting screws inside the main housing 1, forming a discharge point inside the main housing 1; Fourth, the connecting screws of the housing of the handle 3 form a discharge point.

[0020] Regarding the first reason above, as shown in the figure, an anti-static combined stalk switch includes a main housing 1, a main circuit board 2, a handle 3, a knob bracket 31, a first knob assembly 4, and a second knob assembly 5. The knob bracket 31 is arranged inside the housing of the handle 3. The first knob assembly 4 includes a first bracket 41, a first circuit board 42, and a first knob 43. The first bracket 41 is fixedly arranged at the front end of the knob bracket 31. The first circuit board 42 is fixedly arranged on the first bracket 41. The first knob 43 is rotatably arranged on the knob bracket 31, and a connecting column 431 is formed at the front end of the first knob 43. A blocking convex ring 432 is formed on the circumferential side of the connecting column 431. A connecting convex ring 32 matching the connecting column 431 is formed on the inner wall of the housing of the handle 3. A blocking ring groove 33 is opened on the inner wall of the connecting convex ring 32. The connecting column 431 passes through the connecting convex ring 32, and the blocking convex ring 432 is placed in the blocking ring groove 33. A moving contact piece 44 cooperating with the first circuit board 42 is arranged on the connecting column 431.

[0021] In the above structure, as Figure 3 the path shown in a is the path that external static electricity needs to pass through to enter the inside of the handle 3 through the gap between the first knob 43 and the housing of the handle 3. Through the cooperation of the blocking convex ring 432 and the blocking groove, the path for external static electricity to enter the inside of the handle 3 is bent, blocking the external static electricity from entering the inside of the handle 3 and leading it to the mating part of the moving contact piece 44 and the first circuit board 42, enhancing the anti-static performance of the combined stalk switch, preventing interference caused by static electricity when the moving contact piece 44 and the first circuit board 42 are turned on and discharged, and ensuring the stability of the combined stalk switch during operation and thus ensuring driving safety.

[0022] In addition, on the basis of the above structure, a blocking flange 433 surrounding the moving contact piece 44 is formed on the end face of the connecting column 431. The blocking flange 433 is located outside the moving contact piece 44 to prevent the moving contact piece 44 from introducing static electricity, further enhancing the anti-static performance of the combined stalk switch.

[0023] In addition, on the basis of the above structure, a blocking step 434 is formed where the edge of the blocking flanging 433 protrudes from the edge of the connecting column 431. The blocking step 434 makes the path for external static electricity to enter the mating part of the moving contact piece 44 and the first circuit board 42 more bent, playing a role in blocking static electricity and further enhancing the anti-static performance of the combined shift lever switch.

[0024] For the second reason mentioned above, the second knob assembly 5 includes a second bracket 51, a second circuit board 52, and a second knob 53. The second bracket 51 is arranged at the rear end of the knob bracket 31. The second circuit board 52 is arranged on the second bracket 51. The second knob 53 is rotatably arranged at the rear end of the knob bracket 31, and an installation frame 531 penetrating into the second bracket 51 is formed at the front end of the second knob 53. A magnet 54 cooperating with the Hall sensor on the second circuit board 52 is arranged on the installation frame 531.

[0025] In the above structure, as shown by the path in b in the figure, the path for external static electricity to enter the interior of the handle 3 through the gap between the second knob 53 and the housing of the handle 3. By arranging the cooperation part of the magnet 54 and the Hall sensor on the second circuit board 52 inside the knob bracket 31, the path for external static electricity to enter the interior of the handle 3 is bent, blocking the external static electricity from entering the interior of the handle 3 and being led to the cooperation part of the magnet 54 and the Hall sensor of the second circuit board 52, enhancing the anti-static performance of the combined shift lever switch, and preventing interference caused by static electricity when the magnet cooperates with the Hall sensor of the circuit board, ensuring the stability of the combined shift lever switch during operation and thus ensuring driving safety.

[0026] For the third reason mentioned above, the main housing 1 includes a support housing 11 made of a metal material and a wiring cover plate 12 made of an insulating material. An insulating support frame 13 is arranged inside the lower end of the support housing 11. The main circuit board 2 is arranged on the support frame 13. The wiring cover plate 12 is arranged at the lower end of the main housing 1 to cover the main circuit board 2.

[0027] A wiring cavity 311 running through the knob bracket 31 from front to back is formed inside the knob bracket 31. A wiring opening 121 is formed at the side end of the wiring cover plate 12 close to the handle 3. The wires of the first circuit board 42 and the second circuit board 52 penetrate into the wiring cavity 311, then pass out of the handle 3, then pass through the wiring opening 121, and penetrate under the main circuit board 2 to be connected to the main circuit board 2.

[0028] In the above structure, the support housing 11 is made of a metal material to enhance the stability of the combined shift lever switch after installation. The support frame 13 is located above the main circuit board 2, so that there is a certain distance between the main circuit board 2 and the support housing 11, such as Figure 7The path shown in Figure C is the routing path for the wires of the first circuit board 42 and the second circuit board 52 to be connected to the main circuit board 2. The wires of the first circuit board 42 and the second circuit board 52 first penetrate into the routing cavity 311, pass through the housing of the handle 3 after exiting from the port of the routing cavity 311, and then penetrate into the connection cover plate 12 through the routing opening 121 and are connected to the main circuit board 2 below the main circuit board 2, so that the wires of the first circuit board 42 and the second circuit board 52 are away from metal components such as the support housing 11, the connection screws of the main housing 1, and the connection screws of the handle 3 housing, avoiding the formation of additional discharge points and causing power fluctuations, and ensuring the stability of the combined shift switch during operation and thus ensuring driving safety.

[0029] In addition, on the basis of the above structure, at least one analog ground is provided on the main circuit board 2 for absorbing static electricity introduced to the main circuit board 2, strengthening the antistatic performance of the combined shift switch.

[0030] In response to the fourth reason above, the support housing 11 and the handle 3 are connected by a grounding wire 6. Specifically, a first grounding bolt 7 is screwed on the support housing 11, and a second grounding bolt 8 is screwed on the connecting rod 34 of the handle 3. The two ends of the grounding wire 6 are respectively connected to the first grounding bolt 7 and the second grounding bolt 8.

[0031] In the above structure, the handle 3 is grounded through the connection of the grounding wire 6, avoiding the formation of additional discharge points by the connection screws of the handle 3 housing and causing power fluctuations, ensuring the stability of the combined shift switch during operation and thus ensuring driving safety, and the grounding wire 6 is connected to the support housing 11 and the handle 3 through the first grounding bolt 7 and the second grounding bolt 8, facilitating the setting of the grounding wire 6.

[0032] In summary, this combined shift switch blocks external static electricity from entering the interior of the handle 3, and strengthens the antistatic performance of the combined shift switch by optimizing the internal wiring and grounding the handle 3 to avoid the formation of additional discharge points. When the first knob 43 drives the moving contact piece 44 to cooperate with the first circuit board 42 to achieve the control function of the first knob assembly 4, and the second knob 53 drives the magnet 54 to cooperate with the second circuit board 52 to achieve the control function of the second knob assembly 5, and the handle 3 is toggled to cooperate with the main circuit board 2 to achieve the control function, it avoids static electricity and the generation of additional discharge points causing power fluctuations, thereby preventing the single-chip microcomputer on the main circuit board 2 from failing due to power fluctuations, and thus ensuring the stability of the combined shift switch during operation and ensuring driving safety.

[0033] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An antistatic combined shift knob switch, comprising a main housing (1), a main circuit board (2), a handle (3), a knob bracket (31), a first knob assembly (4) and a second knob assembly (5), wherein the knob bracket (31) is arranged inside the handle (3) housing, and is characterized in that: The first knob assembly (4) includes a first bracket (41), a first circuit board (42), and a first knob (43). The first bracket (41) is fixedly arranged at the front end of the knob bracket (31). The first circuit board (42) is fixedly arranged on the first bracket (41). The first knob (43) is rotatably arranged on the knob bracket (31), and a connecting column (431) is formed at the front end of the first knob (43). A blocking convex ring (432) is formed on the circumferential side surface of the connecting column (431). A connecting convex ring (32) matching the connecting column (431) is formed on the inner wall of the housing of the handle (3). A blocking ring groove (33) is formed on the inner wall of the connecting convex ring (32). The connecting column (431) passes through the connecting convex ring (32), and the blocking convex ring (432) is placed in the blocking ring groove (33). A moving contact piece (44) cooperating with the first circuit board (42) is arranged on the connecting column (431).

2. The antistatic combined steering column switch according to claim 1, wherein: A blocking flange (433) surrounding the moving contact piece (44) is formed on the end surface of the connecting column (431).

3. The antistatic combined steering column switch according to claim 2, characterized in that: A blocking step (434) is formed where the edge of the blocking flange (433) protrudes beyond the edge of the connecting column (431).

4. The antistatic combined steering column switch according to claim 1, characterized in that: The second knob assembly (5) includes a second bracket (51), a second circuit board (52), and a second knob (53). The second bracket (51) is arranged at the rear end of the knob bracket (31). The second circuit board (52) is arranged on the second bracket (51). The second knob (53) is rotatably arranged at the rear end of the knob bracket (31), and a mounting bracket (531) penetrating into the second bracket (51) is formed at the front end of the second knob (53). A magnet (54) cooperating with a Hall sensor on the second circuit board (52) is arranged on the mounting bracket (531).

5. The antistatic combined steering column switch according to claim 4, characterized in that: The main housing (1) includes a support housing (11) made of a metal material and a wiring cover plate (12) made of an insulating material. An insulating support frame (13) is arranged inside the lower end of the support housing (11). The main circuit board (2) is arranged on the support frame (13). The wiring cover plate (12) is arranged at the lower end of the main housing (1) to cover the main circuit board (2).

6. The antistatic combined steering column switch according to claim 5, characterized in that: A wiring cavity (311) passing through the knob bracket (31) from front to back is formed inside the knob bracket (31). A wiring opening (121) is formed at the side end of the wiring cover plate (12) close to the handle (3). The wires of the first circuit board (42) and the second circuit board (52) penetrate into the wiring cavity (311), then pass out of the handle (3), and then pass through the wiring opening (121) and penetrate under the main circuit board (2) to be connected to the main circuit board (2).

7. The antistatic combined steering column switch according to claim 6, characterized in that: At least one analog ground is arranged on the main circuit board (2).

8. The antistatic combined steering column switch according to claim 4, characterized in that: The support housing (11) is connected to the handle (3) through a grounding wire (6).

9. The antistatic combined steering column switch according to claim 8, characterized in that: A first grounding bolt (7) is screwed on the support housing (11), and a second grounding bolt (8) is screwed on the connecting rod (34) of the handle (3). Two ends of the grounding wire (6) are respectively connected to the first grounding bolt (7) and the second grounding bolt (8).

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