Electronic gear shifting mechanism of automobile
By integrating P-shift switch and EPB switch on the gear shift lever, combining the circuit board and the operation feel feedback unit, the problem of separation between the EPB switch and the gear shift operation area is solved, and the driver can easily and reliably park operation in one area.
Patent Information
- Application Number
- CN202422262976.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-14
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-09-14
AI Technical Summary
In existing cars, the EPB switch is separated from the gear shifting operation area, which leads to inconvenience in the driver's operation.
The P-speed switch assembly and the EPB switch assembly are integrated into the gear shift lever, and the parking brake or release control is achieved through the rotation of the P-speed switch and the EPB switch. Combined with the operating feel feedback unit and circuit board design, it realizes parking reliability and operation convenience.
The driver can complete gear shifting, P-speed parking and EPB parking operations in one area, improving operational convenience and parking reliability.
Smart Images
Figure CN223076195U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of automobiles, and particularly to an electronic shift mechanism for an automobile. Background Art
[0002] More and more automobiles are equipped with EPB (Electrical Park Brake). The EPB is configured with an EPB switch, an EPB controller, and an EPB actuator. The parking brake or release of the EPB actuator is achieved by operating the EPB switch. When the EPB switch is operated to the on state, the EPB controller controls the EPB actuator to perform parking braking. When the EPB switch is operated to the off state, the EPB controller controls the EPB actuator to release. Currently, the EPB switch is separated from the shift operation area and is relatively far apart, which is inconvenient for the driver to operate.
[0003] In view of this, how to improve the operation convenience of the driver is a technical problem that needs to be solved by those skilled in the art. Utility Model Content
[0004] To achieve the above object, this application provides an electronic shift mechanism for an automobile, including a shift lever, a P - gear switch assembly, and an EPB switch assembly. The P - gear switch assembly and the EPB switch assembly are both integrated on the shift lever. The P - gear switch assembly includes a P - gear switch and a P - gear circuit board. The P - gear circuit board is used for electrically connecting with the vehicle controller, enabling the vehicle controller to control the vehicle to enter or exit the P - gear according to the switch state of the P - gear switch. The EPB switch assembly includes an EPB switch and an EPB circuit board. The EPB circuit board is used for electrically connecting with the EPB controller, enabling the EPB controller to control the EPB actuator to perform parking braking or release according to the switch state of the EPB switch.
[0005] In an implementation manner of the electronic shift mechanism for an automobile, the P - gear circuit board is further used for electrically connecting with the EPB controller, enabling the EPB controller to control the EPB actuator to perform parking braking or release according to the switch state of the P - gear switch.
[0006] In an implementation manner of the electronic shift mechanism for an automobile, the EPB switch is connected to one end of the shift lever, and the EPB switch realizes the switching of the switch state by rotating relative to the shift lever.
[0007] In an implementation manner of the electronic shift mechanism for an automobile, the EPB switch assembly includes a contact bridge. The contact bridge can rotate together with the EPB switch. The contact bridge has two arms, and the two arms are respectively in contact with two groups of conductors of the EPB circuit board. When the contact bridge rotates, the two arms are respectively in contact with different positions of the two groups of conductors.
[0008] An implementation of the electronic shift mechanism of an automobile. The EPB switch assembly includes an operating feel feedback unit. The operating feel feedback unit includes a spring, a spring bracket, and a pressing member. Two ends of the spring are respectively in contact with the spring bracket and the pressing member. One of the spring bracket and the pressing member serves as a rotating member and rotates with the EPB switch, so as to change the compression degree of the spring through the rotation of the rotating member.
[0009] An implementation of the electronic shift mechanism of an automobile. The operating feel feedback unit includes a ball. The pressing member is provided with a smooth curved surface. The smooth curved surface is in contact with one end of the spring through the ball. The smooth curved surface is an uneven structure that is locally convex towards the ball and locally concave away from the ball. When the EPB switch rotates, different height positions of the smooth curved surface are in contact with the ball.
[0010] An implementation of the electronic shift mechanism of an automobile. The outer surface of the shift lever is provided with a first position mark, a second position mark, and a third position mark. The first position mark, the second position mark, and the third position mark are sequentially arranged in the circumferential direction around the rotation axis of the EPB switch. The outer surface of the EPB switch is provided with a reference position mark. When the EPB switch is in the on state or the off state, the reference position mark is aligned with the first position mark or the third position mark. After the operating force is removed, the elastic force of the spring makes the EPB switch automatically return to the position where the reference position mark is aligned with the second position mark.
[0011] An implementation of the electronic shift mechanism of an automobile. The P - gear switch is connected to one end of the EPB switch away from the shift lever. The P - gear switch realizes the switching of the switch state by moving along the rotation axis of the EPB switch.
[0012] An implementation of the electronic shift mechanism of an automobile. The P - gear switch assembly includes a conductive member and a push rod. The P - gear circuit board and the conductive member are located inside the shift lever. One end of the push rod is connected to the P - gear switch, and the other end of the push rod passes through the EPB switch assembly and extends near the conductive member. When the P - gear switch moves towards the conductive member, it drives the push rod to push against the conductive member, so that the conductive member is in contact with two conductive contacts on the P - gear circuit board to conduct the circuit of the P - gear circuit board.
[0013] An implementation of the electronic shift mechanism of an automobile, wherein the conductive member is made of a flexible material and has a plate-shaped main body. A part of the plate-shaped main body bulges away from the P - gear circuit board to form two convex portions. When the P - gear switch moves towards the conductive member, the push rod is driven to push against the two convex portions of the conductive member, causing the two convex portions to deform towards the conductive contacts, thereby contacting the two conductive contacts on the P - gear circuit board. Description of the Drawings
[0014] Figure 1 A plan view of an embodiment of the electronic shift mechanism provided by the present application;
[0015] Figure 2 is Figure 1 a sectional view taken along the A - A direction of
[0016] Figure 3 A three - dimensional sectional view of another embodiment of the electronic shift mechanism provided by the present application;
[0017] Figure 4 is Figure 3 a schematic diagram of the spring bracket and the contact bridge fixed together in
[0018] Figure 5 A schematic diagram of the EPB circuit board;
[0019] Figure 6 A schematic diagram of the pressing member, the spring and the ball;
[0020] Figure 7 A schematic diagram of the P - gear circuit board;
[0021] Figure 8 A schematic diagram of the conductive member;
[0022] Figure 9 A schematic diagram of an application example of the electronic shift mechanism provided by the present application;
[0023] Figure 10 A flowchart of a control logic of the electronic shift mechanism provided by the present application;
[0024] Figure 11 A flowchart of another control logic of the electronic shift mechanism provided by the present application.
[0025] The descriptions of the reference numerals are as follows:
[0026] 1 - Shift lever, A - First position mark, B - Second position mark, C - Third position mark, 2 - EPB switch assembly, 21 - EPB switch, D - Reference position mark, 22 - EPB circuit board, 22a - Conductor, 23 - Spring, 24 - Spring bracket, 25 - Pressing member, 25a - Driving surface, 26 - Ball, 27 - Contact bridge, 27a - Arm, 3 - P - gear switch assembly, 31 - P - gear switch, 32 - P - gear circuit board, 32a - Conductive contact, 33 - Conductive member, 33a - Plate - shaped body, 33b - Protrusion, 33c - Connecting post, 34 - Push rod, 35 - Circuit board bracket, 4 - Mounting seat, 5 - Turn signal lever. Detailed implementation mode
[0027] To enable those skilled in the art of the present technical field to better understand the technical solutions of this application, the technical solutions of this application will be further described in detail below in combination with specific embodiments in the accompanying drawings.
[0028] As Figure 1 、 Figure 2 shown, the electronic shift mechanism provided by this application includes a shift lever 1, a P - gear switch assembly 3, and an EPB switch assembly 2. The P - gear switch assembly 3 and the EPB switch assembly 2 are both integrated on the shift lever 1.
[0029] The P - gear switch assembly 3 at least includes a P - gear switch 31 and a P - gear circuit board 32. The P - gear circuit board 32 is used for electrically connecting with the vehicle control unit (VCU), enabling the vehicle control unit to obtain the switch state of the P - gear switch 31 through the P - gear circuit board 32, and then being able to control the vehicle to enter or exit the P - gear according to the switch state of the P - gear switch 31.
[0030] The EPB switch assembly 2 at least includes an EPB switch 21 and an EPB circuit board 22. The EPB switch 21 and the P - gear switch 31 are independent of each other and can perform switch actions separately. The EPB circuit board 22 is electrically connected with the EPB controller, enabling the EPB controller to obtain the switch state of the EPB switch 21 through the EPB circuit board 22, and then being able to control the EPB actuator to perform parking braking or release according to the switch state of the EPB switch 21.
[0031] For the above - mentioned electronic shift mechanism, when the driver shifts gears, performs P - gear parking, and EPB parking, all operations are carried out in one area, making the operation more convenient and fast. Moreover, the P - gear parking braking function can be achieved by operating the P - gear switch 31, and the EPB parking braking function can also be achieved by operating the EPB switch 21, ensuring the reliability of parking.
[0032] In some embodiments, the P - gear circuit board 32 is also electrically connected to the EPB controller, enabling the EPB controller to obtain the switch state of the P - gear switch 31 through the P - gear circuit board 32, and then being able to control the EPB actuator to perform parking braking according to the switch state of the P - gear switch 31. With this design, in addition to being able to make the EPB actuator perform parking braking by operating the EPB switch 21, it is also possible to make the EPB actuator perform parking braking by operating the P - gear switch 31, further improving the parking reliability.
[0033] In some embodiments, the EPB controller is located inside the shift lever 1. The shift lever 1 is a hollow structure. By the inside of the shift lever 1, it means the hollow cavity of the shift lever 1. The P - gear circuit board 32 and the EPB circuit board 22 are electrically connected to the EPB controller through FPC.
[0034] In some embodiments, when the P - gear circuit board 32 is electrically connected to both the vehicle controller and the EPB controller, the current intention of the driver to select P - gear parking braking or EPB parking braking is judged by the operation duration of the driver on the P - gear switch 31. For example, when the driver presses the P - gear switch 31, if the pressing duration is short, the vehicle controller controls the vehicle to enter the P - gear; if the pressing duration is long, the EPB controller controls the EPB actuator to perform parking braking.
[0035] In some embodiments, as Figures 1-3 shown, the EPB switch 21 is connected to one end of the shift lever 1, and the switch state is switched by rotating relative to the shift lever 1.
[0036] In some embodiments, as Figure 3 shown, the EPB switch assembly 2 includes a contact bridge 27. The contact bridge 27 has two arms 27a (see Figure 4 ). The two arms 27a are respectively in contact with two groups of conductors 22a (see Figure 5 ) of the EPB circuit board 22, thus making the circuit of the EPB circuit board 22 conductive. When the EPB switch 21 rotates, the contact bridge 27 rotates together. When the contact bridge 27 rotates, the two arms 27a are respectively in contact with different positions of the two groups of conductors 22a, thereby changing the circuit resistance. The EPB controller judges the switch state of the EPB switch 21 according to the change of the circuit resistance. For example, when the driver rotates the EPB switch 21 clockwise and the circuit resistance increases to a preset value, the EPB controller judges that the EPB switch 21 reaches the on - state, and at this time the EPB controller controls the EPB actuator to perform parking braking. When the driver rotates the EPB switch 21 counter - clockwise and the circuit resistance decreases to a preset value, the EPB controller judges that the EPB switch 21 reaches the off - state, and at this time the EPB controller controls the EPB actuator to release.
[0037] In some embodiments, asFigure 2 and Figure 3 As shown in Figure 3 , the EPB switch assembly 2 includes an operating feel feedback unit, and the operating feel feedback unit at least includes a spring 23, a spring bracket 24, and a pressing member 25. The spring 23 is installed on the spring bracket 24. Two ends of the spring 23 are respectively in contact with the spring bracket 24 and the pressing member 25. One of the spring bracket 24 and the pressing member 25 serves as a rotating member and rotates with the EPB switch 21, so as to change the compression degree of the spring 23 through the rotation of the rotating member. With such a design, when the EPB switch 21 rotates, the rotating member rotates accordingly, resulting in a change in the compression degree of the spring 23. If the compression degree of the spring 23 increases, the elastic force acting on the rotating member and the EPB switch 21 increases, increasing the rotation resistance of the EPB switch 21. If the compression degree of the spring 23 decreases, the elastic force acting on the rotating member and the EPB switch 21 decreases, reducing the rotation resistance of the EPB switch 21. Thus, a driver can obtain an operating feel feedback when operating the EPB switch 21.
[0038] In some embodiments, as Figure 2 、 Figure 3 、 Figure 6 shown, the operating feel feedback unit includes a ball 26, and the ball 26 is installed on the spring bracket 24. The pressing member 25 is provided with a driving surface 25a, and the driving surface 25a is in contact with one end of the spring 23 through the ball 26. The driving surface 25a is a rough structure that is locally convex toward the ball 26 and locally concave away from the ball 26, and different height positions of the driving surface 25a are smoothly transitioned. Figure 6 In Figure 6 , the pressing member 25 is provided with two driving surfaces 25a, each driving surface 25a is substantially in a W shape, and each driving surface 25a is in contact with one end of a spring 23 through a ball 26. Taking the spring bracket 24 as the rotating member as an example, when the EPB switch 21 rotates, the spring bracket 24, the spring 23, and the ball 26 rotate together. At this time, the ball 26 rolls along the driving surface 25a. If the ball 26 rolls from a low position of the driving surface 25a to a high position of the driving surface 25a, the compression degree of the spring 23 increases. If the ball 26 rolls from a high position of the driving surface 25a to a low position of the driving surface 25a, the compression degree of the spring 23 decreases.
[0039] In some embodiments, one of the spring bracket 24 and the pressing member 25 is threadedly connected to the EPB switch 21, and a rotation limiting mechanism is provided on the shift lever 1 to limit it from rotating with the EPB switch 21. Taking the threaded connection between the pressing member 25 and the EPB switch 21 as an example, when the EPB switch 21 rotates, the pressing member 25 does not rotate under the limiting action of the rotation limiting mechanism, but will move closer to or farther away from the spring bracket 24 under the action of the threaded connection. If it moves closer to the spring bracket 24, the compression degree of the spring 23 increases; if it moves farther away from the spring bracket 24, the compression degree of the spring 23 decreases.
[0040] Figure 2 and Figure 3 In, the positions of the pressing member 25 and the spring bracket 24 are different. Figure 2 In, the pressing member 25 is located on the side of the spring bracket 24 close to the shift lever 1 ( Figure 2 the left side in). Figure 3 In, the pressing member 25 is located on the side of the spring bracket 24 away from the shift lever 1 ( Figure 2 the right side in). Figure 3 In, the spring bracket 24 rotates with the EPB switch 21 as a rotating member. The EPB circuit board 22 is located on the side of the spring bracket 24 close to the shift lever 1, and the contact bridge 27 for contacting the EPB circuit board 22 is fixed to the spring bracket 24 (in combination with Figure 4 understanding).
[0041] In some embodiments, such as Figure 2 and Figure 3 shown, the EPB switch 21 is of a sleeve structure, and the pressing member 25 and / or the spring bracket 24 is at least partially located inside the sleeve of the EPB switch 21.
[0042] In some embodiments, such as Figure 1 shown, the outer surface of the shift lever 1 is provided with a first position mark A, a second position mark B, and a third position mark C. The first position mark A, the second position mark B, and the third position mark C are sequentially arranged in the circumferential direction around the rotation axis of the EPB switch 21. The outer surface of the EPB switch 21 is provided with a reference position mark D. When the EPB switch 21 is in the on state or the off state, the reference position mark D is aligned with the first position mark A or the third position mark C. After the operating force is removed, the elastic force of the spring 23 causes the EPB switch 21 to automatically return to the position where the reference position mark D is aligned with the second position mark B.
[0043] In some embodiments, such as Figure 1 shown, the P - gear switch 31 is connected to one end of the EPB switch 21 away from the shift lever 1. The P - gear switch 31 realizes the switching of the switch state by moving along the rotation axis of the EPB switch 21, so that the P - gear switch 31 is a push - type switch.
[0044] In some embodiments, as Figure 2 , Figure 3 shown, the P - gear switch assembly 3 includes a conductive member 33 and a push rod 34. The P - gear circuit board 32 and the conductive member 33 are located inside the shift lever 1. One end of the push rod 34 is connected to the P - gear switch 31. The other end of the push rod 34 passes through the EPB switch assembly 2 and extends near the conductive member 33. For the convenience of the push rod 34 to pass through, the spring bracket 24 and the pressing member 25 can both be designed as sleeve structures, and the push rod 34 passes through the sleeves of the spring bracket 24 and the pressing member 25. When the P - gear switch 31 is operated to move towards the conductive member 33, it drives the push rod 34 to push against the conductive member 33, so that the conductive member 33 contacts two conductive contacts 32a (see Figure 7 ) on the P - gear circuit board 32, to conduct the circuit of the P - gear circuit board 32. In this way, the vehicle controller and the EPB controller can perform parking brake control in response to the circuit conduction signal of the P - gear circuit board 32.
[0045] In some embodiments, as Figure 3 shown, a circuit board bracket 35 is further provided. The circuit board bracket 35 is located inside the shift lever 1, and the P - gear circuit board 32 and the EPB circuit board 22 are both fixed to the circuit board bracket 35.
[0046] In some embodiments, as Figure 8 shown, the conductive member 33 is made of a flexible material, such as rubber. The conductive member 33 has a plate - shaped main body 33a, and two convex portions 33b are formed by the local bulging of the plate - shaped main body 33a in the direction away from the P - gear circuit board 32. When the P - gear switch 31 moves towards the conductive member 33, it drives the push rod 34 to push against the two convex portions 33b of the conductive member 33, so that the two convex portions 33b are respectively deformed towards the two conductive contacts 32a on the P - gear circuit board 32, thereby enabling the two convex portions 33b to respectively contact the two conductive contacts 32a on the P - gear circuit board 32 to achieve circuit conduction. In this way, when the operating force is removed, the two convex portions 33b can deform in the reverse direction to push the push rod 34 and the P - gear switch 31 to reset in the reverse direction.
[0047] In some embodiments, as Figure 8 shown, the conductive member 33 is further provided with a connecting post 33c, and the connecting post 33c is riveted to the connecting hole on the P - gear circuit board 32. In this way, the relative positions of the conductive member 33 and the P - gear circuit board 32 are relatively stable.
[0048] In some embodiments, as Figure 9 shown, the vehicle includes a mounting seat 4. The mounting seat 4 is fixed on the steering wheel. One end of the shift lever 1 of the electronic shift mechanism is connected to the mounting seat 4. Other switches, such as a wiper switch, a turn signal lever 5, etc., are also connected to the mounting seat 4, thereby forming a combined switch unit.
[0049] In some embodiments, such as Figure 10 shown, when the driver presses the P gear switch 31, if the vehicle speed is less than the preset value, the vehicle controller controls the vehicle to enter the P gear, and the EPB controller controls the EPB actuator to perform parking braking. If the vehicle speed is not less than the preset value, the gear remains unchanged, and the EPB controller controls the EPB actuator to perform parking braking. And the problem of accidentally touching the P gear switch 31 is solved by combining the filtering time.
[0050] In some embodiments, such as Figure 11 shown, if the current gear is the P gear and the EPB switch 21 rotates in the closing direction, the EPB controller controls the EPB actuator to release, and the vehicle controller controls the vehicle to enter the N gear. If the current gear is not the P gear, the EPB controller controls the EPB actuator to release, and the gear remains unchanged. And the problem of accidentally touching the EPB switch 21 is solved by combining the filtering time.
[0051] The above uses specific examples to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of the present application, several improvements and modifications can still be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.
Claims
1. An electronic shift mechanism for an automobile, characterized in that, It includes a shift lever (1), a P - range switch assembly (3) and an EPB switch assembly (2). The P - range switch assembly (3) and the EPB switch assembly (2) are both integrated in the shift lever (1). The P - range switch assembly (3) includes a P - range switch (31) and a P - range circuit board (32). The P - range circuit board (32) is used for electrically connecting with the vehicle controller, enabling the vehicle controller to control the vehicle to enter or exit the P - range according to the switch state of the P - range switch (31). The EPB switch assembly (2) includes an EPB switch (21) and an EPB circuit board (22). The EPB circuit board (22) is used for electrically connecting with the EPB controller, enabling the EPB controller to control the EPB actuator to perform parking brake or release according to the switch state of the EPB switch (21).
2. The electronic shift mechanism of an automobile according to claim 1, characterized in that The P - range circuit board (32) is also used for electrically connecting with the EPB controller, enabling the EPB controller to control the EPB actuator to perform parking brake or release according to the switch state of the P - range switch (31).
3. The electronic shift mechanism of the vehicle according to claim 2, characterized in that, The EPB switch (21) is connected to one end of the shift lever (1), and the EPB switch (21) realizes the switching of the switch state by rotating relative to the shift lever (1).
4. The electronic shift mechanism of the vehicle according to claim 3, characterized in that The EPB switch assembly (2) includes a contact bridge (27). The contact bridge (27) can rotate together with the EPB switch (21). The contact bridge (27) has two arms (27a). The two arms (27a) are respectively in contact with two groups of conductors (22a) of the EPB circuit board (22). When the contact bridge (27) rotates, the two arms (27a) are respectively in contact with different positions of the two groups of conductors (22a).
5. The electronic shift mechanism of an automobile according to claim 4, characterized in that, The EPB switch assembly (2) includes an operation feel feedback unit. The operation feel feedback unit includes a spring (23), a spring bracket (24) and a pressing member (25). The spring (23) is installed on the spring bracket (24). The two ends of the spring (23) are respectively in contact with the spring bracket (24) and the pressing member (25). One of the spring bracket (24) and the pressing member (25) serves as a rotating part and rotates together with the EPB switch (21) to change the compression degree of the spring (23) through the rotation of the rotating part.
6. The electronic shift mechanism of an automobile according to claim 5, characterized in that, The operation feel feedback unit includes a ball (26). The pressing member (25) is provided with a driving surface (25a). The driving surface (25a) is in contact with one end of the spring (23) through the ball (26). The driving surface (25a) is a rough structure with local convexities towards the direction close to the ball (26) and local concavities towards the direction away from the ball (26). When the EPB switch (21) rotates, different height positions of the driving surface (25a) are in contact with the ball (26).
7. The electronic shift mechanism of an automobile according to claim 6, characterized in that, The outer surface of the shift lever (1) is provided with a first position mark (A), a second position mark (B), and a third position mark (C). The first position mark (A), the second position mark (B), and the third position mark (C) are sequentially arranged in the circumferential direction around the rotation axis of the EPB switch (21). The outer surface of the EPB switch (21) is provided with a reference position mark (D). When the EPB switch (21) is in the on state or the off state, the reference position mark (D) is aligned with the first position mark (A) or the third position mark (C). After the operating force is removed, the elastic force of the spring (23) causes the EPB switch (21) to automatically return to the position where the reference position mark (D) is aligned with the second position mark (B).
8. The electronic shift mechanism of an automobile according to any one of claims 3-7, characterized in that, The P - gear switch (31) is connected to one end of the EPB switch (21) away from the shift lever (1), and the switching of the switch state of the P - gear switch (31) is achieved by moving along the rotation axis of the EPB switch (21).
9. The electronic shift mechanism of an automobile according to claim 8, characterized in that, The P - gear switch assembly (3) includes a conductive member (33) and a push rod (34). The P - gear circuit board (32) and the conductive member (33) are located inside the shift lever (1). One end of the push rod (34) is connected to the P - gear switch (31), and the other end of the push rod (34) passes through the EPB switch assembly (2) and extends near the conductive member (33). When the P - gear switch (31) moves in the direction close to the conductive member (33), it drives the push rod (34) to push against the conductive member (33), so that the conductive member (33) contacts two conductive contacts (32a) on the P - gear circuit board (32) to conduct the circuit of the P - gear circuit board (32).
10. The electronic shift mechanism of an automobile according to claim 9, characterized in that, The conductive member (33) is made of a flexible material and has a plate - shaped main body (33a). The plate - shaped main body (33a) bulges locally in the direction away from the P - gear circuit board (32) to form two convex portions (33b). When the P - gear switch (31) moves in the direction close to the conductive member (33), it drives the push rod (34) to push against the two convex portions (33b) of the conductive member (33), so that the two convex portions (33b) are respectively deformed in the direction close to the two conductive contacts (32a) on the P - gear circuit board (32), and thus respectively contact the two conductive contacts (32a) on the P - gear circuit board (32).