Positioning device for rotating mechanism of automobile seat

Abstract

The present invention provides a positioning device for a rotating mechanism of a car seat, comprising a static module and a dynamic module; the static module comprises a fixed bracket, positioning grooves are evenly provided on the outer edge of the fixed bracket along the circumferential direction, mounting grooves are respectively provided on the inner edge of the fixed bracket at positions corresponding to each positioning groove, and a reed switch for controlling a rotating motor is respectively installed in each mounting groove; the dynamic module comprises a movable bracket, a magnet and a slider, the movable bracket comprises a shell and guide side wings located on both sides of the shell, waist-shaped holes are respectively provided on the top and bottom surfaces of the shell, a sliding groove connected with the two waist-shaped holes and for sliding of the slider is provided on the side of the shell facing the fixed bracket, a through hole is provided on the slider, the two ends of the magnet pass through the two waist-shaped holes, the middle part of the magnet is interference-fitted with the through hole, a rubber band for tightening the top of the magnet is sleeved on the shell, so that the head of the slider is pressed against the fixed bracket. The above-mentioned present invention can realize the precise positioning of the car seat.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile seats, and more specifically, to a positioning device for a rotating mechanism of an automobile seat. Background Art

[0002] The electric car seat uses a rotary motor to drive the seat rotating part to realize the rotation function. Due to the characteristics of the mechanical structure and processing accuracy, when the electric car seat rotates to the predetermined position, the motor cannot stop in time or stops prematurely before moving to the right position. The seat rotation angle cannot be well controlled, and the experience is poor. Summary of the invention

[0003] In view of the above problems, an object of the present invention is to provide a positioning device for a rotating mechanism of a car seat, so as to solve the problem that the motor cannot stop in time when the seat rotates to a predetermined position, or stops prematurely before moving to the desired position.

[0004] The positioning device of the automobile seat rotating mechanism provided by the present invention comprises: a static module fixed on the fixed part of the automobile seat and a dynamic module fixed on the rotating part of the automobile seat; wherein the static module comprises a circular fixed bracket, positioning grooves are evenly opened along the circumferential direction on the outer edge of the fixed bracket, mounting grooves are respectively opened at the inner edge of the fixed bracket at the position corresponding to each positioning groove, a reed switch is respectively installed in each mounting groove, and two wires led out of each reed switch are respectively connected to the rotating motor of the rotating part of the automobile seat; the dynamic module comprises a movable bracket, a magnet and a slider, the movable bracket comprises a shell and guide side wings located on both sides of the shell, waist-shaped holes are respectively opened on the top surface and the bottom surface of the shell, a sliding groove connected with the two waist-shaped holes and for sliding of the slider is opened on the side of the shell facing the fixed bracket, a through hole is opened on the slider, two ends of the magnet pass through the two waist-shaped holes, the middle part of the magnet is interference-fitted with the through hole, a rubber band for tightening the top of the magnet is sleeved on the shell, so that the head of the slider is pressed against the fixed bracket.

[0005] In addition, a preferred structure is that chamfers are processed in the positioning groove and on the head of the slider.

[0006] In addition, a preferred structure is that guide rails are respectively arranged on both sides of the through hole on the top surface of the slider, and a guide groove for the guide rails to slide is opened on the top surface of the slide groove.

[0007] Furthermore, the preferred structure is that the rotating motor control circuit board includes a voltage conversion module, a WiFi module, a serial port to parallel port module, a CPU, a power drive module and a rotating motor control circuit; wherein the input interface of the voltage conversion module is connected to the vehicle body power supply, and the output port of the voltage conversion module is respectively connected to the WiFi module, the serial port to parallel port module, the CPU and the power drive module; the WiFi module wirelessly communicates with the vehicle-mounted WiFi source, and is used to receive the seat rotation instruction sent by the intelligent mobile terminal that wirelessly communicates with the vehicle-mounted WiFi source, and the WiFi module is connected to the serial port to parallel port module, and is used to send the seat rotation instruction to the serial port to parallel port module; the serial port to parallel port module is connected to the CPU, and is used to receive the serial signal sent by the WiFi module and convert it into a parallel signal according to a predetermined timing and send it to the CPU; the CPU is connected to the power drive module, and is used to perform a logical operation on the parallel signal sent by the serial port to parallel port module, and send the instruction after the logical operation to the power drive module; the power drive module is connected to the rotating motor through the rotating motor control circuit, and the power drive module is used to control the rotating motor control circuit according to the instruction after the CPU logical operation, so as to rotate the rotating motor Control; and, the number of the positioning slots and the number of the reed switches are three, the three reed switches are respectively a first reed switch located at a 0° position, a second reed switch located at a 90° position, and a third reed switch located at a 180° position; the power drive module includes a first output port, a second output port, and a third output port; the rotating motor control circuit includes a first relay and a second relay, the first relay includes a first coil, a first static contact, a second static contact, and a first moving contact, the second relay includes a second coil, a third static contact, a fourth static contact, and a second moving contact, one end of the first coil is connected to the first The output port is connected, the other end of the first coil is connected to one end of the second reed switch and the third reed switch respectively, the other end of the second reed switch is connected to the second output port and the second coil respectively, the other end of the third reed switch is connected to the third output port and the fourth static contact, one end of the second coil is connected to the second output port, the other end of the second coil is connected to one end of the first reed switch, the other end of the first reed switch is connected to the third output port, the second static contact and the third static contact are grounded respectively, the first moving contact is connected to the first pin of the rotating motor, and the second moving contact is connected to the second pin of the rotating motor.

[0008] By using the positioning device of the automobile seat rotating mechanism of the present invention, the following technical effects can be achieved:

[0009] (1) The processing accuracy is easy to ensure: Due to the structural characteristics, only the positioning groove of the fixed bracket and the head of the slider need to be finely processed;

[0010] (2) Does not affect the strength of the seat: This structural arrangement is on the outside of the seat rotation column and does not impose excessive restrictions on the size of the rotation axis;

[0011] (3) Short response time: When the seat rotates to the predetermined position, the magnet immediately moves toward the reed switch along the guide of the slider, causing the reed switch to respond and control the rotating motor;

[0012] (4) Low cost and high design redundancy. This structure takes up little space, has no coupling requirements with other components and functions, does not require additional driving force, and has obvious cost advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] By referring to the following description in conjunction with the accompanying drawings, and with a more comprehensive understanding of the present invention, other objects and results of the present invention will become more apparent and easy to understand. In the accompanying drawings:

[0014] Figure 1 It is a schematic diagram of the overall structure of a positioning device of a rotating mechanism of a car seat according to an embodiment of the present invention;

[0015] Figure 2 It is a schematic diagram of the exploded structure of the positioning device of the automobile seat rotating mechanism according to an embodiment of the present invention;

[0016] Figure 3 is a schematic diagram of the overall structure of a static module according to an embodiment of the present invention;

[0017] Figure 4 is a schematic diagram of the decomposed structure of a static module according to an embodiment of the present invention;

[0018] Figure 5 is a schematic diagram of the overall structure of a moving module according to an embodiment of the present invention;

[0019] Figure 6 is a schematic diagram of the decomposed structure of a moving module according to an embodiment of the present invention;

[0020] Figure 7 A schematic diagram of the assembly relationship between a static module and a dynamic module according to an embodiment of the present invention;

[0021] Figure 8 A schematic diagram of the logic structure of a rotating electrical machine control circuit board according to an embodiment of the present invention;

[0022] Figure 9a-9c for Figure 8 Three state diagrams of the equivalent circuit of the rotating motor control circuit.

[0023] The reference numerals include: static module 1, positioning bracket 11, positioning groove 111, mounting groove 112, reed switch 12, dynamic module 2, mobile bracket 21, shell 211, waist-shaped hole 2111, slide groove 2112, guide wing 212, rubber band 22, magnet 23, slider 24, through hole 241, guide rail 242, car seat fixing part 3, car seat rotating part 4, voltage conversion module 51, WiFi module 52, serial port to parallel port module 53, CPU 54, power drive module 55, first output port 551, second output port 552, third output port 553, rotating motor control circuit 56, indicator light 57, first relay K1, second relay K2, first reed switch S1, second reed switch S2, third reed switch S3, vehicle body power supply 6, intelligent mobile terminal 7, vehicle-mounted WiFi source 8, rotating motor 9, first pin 91, second pin 92. DETAILED DESCRIPTION

[0024] In the following description, for the purpose of illustration, in order to provide a comprehensive understanding of one or more embodiments, many specific details are set forth. However, it is apparent that these embodiments may also be implemented without these specific details. In other examples, for ease of describing one or more embodiments, known structures and devices are shown in the form of block diagrams.

[0025] Figure 1 and Figure 2 The overall structure and the exploded structure of the positioning device of the automobile seat rotating mechanism according to the embodiment of the present invention are respectively shown.

[0026] like Figure 1 and Figure 2 As shown, the positioning device of the automobile seat rotating mechanism provided by the embodiment of the present invention comprises: a static module 1 and a dynamic module 2, the static module 1 is fixed to the automobile seat fixed part 3 and remains stationary, the dynamic module 2 is fixed to the automobile seat rotating part 4 and rotates coaxially with the automobile seat rotating part 4, the automobile seat fixed part 3 refers to the part of the seat cushion, the rotating motor and other parts connected to the vehicle body, the automobile seat rotating part 4 refers to the rotatable part of the seat cushion and the backrest, the automobile seat fixed part 3 and the automobile seat rotating part 4 are both prior arts, so they are not repeated in the present invention.

[0027] Figure 3 and Figure 4 The overall structure and the decomposed structure of the static module according to the embodiment of the present invention are respectively shown.

[0028] like Figure 3 and Figure 4 As shown, the static module includes a circular fixing bracket 11, and positioning grooves 111 are evenly opened along the circumferential direction on the outer edge of the fixing bracket 11. Figure 3 and Figure 4Three positioning grooves 111 are shown in the figure, and installation grooves 112 are respectively opened at the inner edge of the fixed bracket 11 at the position corresponding to each positioning groove 111. A reed switch 12 is respectively installed in each installation groove 112. Each reed switch 12 is connected to the rotating motor control circuit board, and the rotating motor control circuit board is connected to the rotating motor of the rotating part 4 of the car seat, and is used to control the rotating motor according to the response of the reed switch 12.

[0029] Figure 5 and Figure 6 The overall structure and the decomposed structure of the dynamic module according to the embodiment of the present invention are respectively shown.

[0030] like Figure 5 and Figure 6 As shown, the moving module includes a moving bracket 21, a rubber band 22, a magnet 23 and a slider 24; wherein the moving bracket 21 includes a shell 211 and guide wings 212 located on both sides of the shell 211, the guide wings 212 guide the moving module as a whole, and ensure that the rubber band 22, the magnet 23 and the slider 24 move along a predetermined track, waist-shaped holes 2111 for the magnet 23 to move are respectively provided on the top and bottom surfaces of the shell 211, and a sliding groove 2112 connected with the two waist-shaped holes 2111 and for the slider 24 to slide is provided on the side of the fixed bracket of the shell 211 facing the static module, and the sliding groove 2112 connected with the two waist-shaped holes 2111 and for the slider 24 to slide is provided on the slider 2 4 is provided with a through hole 241, two ends of the magnet 24 pass through two waist-shaped holes 2111, and the middle part of the magnet 23 is interference-fitted with the through hole 241. The movement of the magnet 23 drives the slider 24 to move, so that the head of the slider 24 slides out of or into the slide groove 2112. The rubber band 22 is arranged on the casing 211, and is used to tighten the top of the magnet 23, and always applies a tensioning force to the magnet 23 to move the magnet 23 toward the fixed bracket of the static module, so that the head of the slider 24 is against the fixed bracket of the static module. When the slider 24 rotates to the position of the positioning groove, the head of the slider 24 slides into the positioning groove.

[0031] In order to facilitate the head of the slider 24 to slide into or out of the positioning groove, chamfers are processed in the positioning groove and on the head of the slider 24 respectively.

[0032] Guide rails 242 are provided on both sides of the through hole 241 on the top surface of the slider 24, and a guide groove for the guide rails 242 to slide is provided on the top surface of the slide groove 2112. The guide rails 242 cooperate with the guide groove to achieve the guiding function of the slider 24 during the sliding process.

[0033] Figure 7 The figure shows the assembly relationship between the static module and the dynamic module according to the embodiment of the present invention.

[0034] like Figure 7As shown in the figure, when the rotating part 4 of the car seat drives the moving module 2 thereon to rotate, the head of the slider 24 is in close contact with the surface of the fixing bracket 11. At this time, since the head of the slider 24 does not move into the positioning groove 111, the distance between the magnet 23 and the reed switch 12 is greater than the sensing distance of the reed switch 12 (the reed switch 12 will respond to the magnet 23 approaching within a certain distance and output an electrical signal, and this distance is the sensing distance). The reed switch 12 does not respond. When the seat rotates to a predetermined position, the pre-tightening force of the rubber band 22 The magnet 23 is tightened, thereby driving the head of the slider 24 to move into the positioning groove 111 provided on the fixed bracket 11. At this time, the distance between the magnet 23 and the reed switch 12 is smaller than the sensing distance of the reed switch 12, and the reed switch 12 immediately responds to stop the rotating motor and thus stop the seat, thereby ensuring the accuracy of the seat positioning. When the seat rotates again, since the positioning groove of the fixed bracket 11 and the head of the slider 24 are both chamfered, the slider 24 can slide out of the positioning groove 11 smoothly without affecting the normal rotation of the seat.

[0035] Figure 8 The logical structure of the rotating electrical machine control circuit board according to the embodiment of the present invention is shown.

[0036] like Figure 8 As shown, the rotating motor control circuit board includes a voltage conversion module 51 , a WiFi module 52 , a serial port to parallel port module 53 , a CPU 54 , a power drive module 55 and a rotating motor control circuit 56 .

[0037] Among them, the input interface of the voltage conversion module 51 is connected to the two pins of the vehicle body power supply 6, and the output port of the voltage conversion module 51 is respectively connected to the WiFi module 52, the serial port to parallel port module 53, the CPU 54, and the power drive module 55. The voltage conversion module 51 is used to take electricity from the vehicle body power supply 6 and then transform it to supply power to the WiFi module 52, the serial port to parallel port module 53, the CPU 54, and the power drive module 55. The model of the voltage conversion module 51 is FR9886.

[0038] Among them, the WiFi module 52 wirelessly communicates with the vehicle-mounted WiFi source 8, and the smart mobile terminal 7 also wirelessly communicates with the vehicle-mounted WiFi source 8, that is, the WiFi module 52 and the smart mobile terminal 7 are simultaneously connected to the vehicle-mounted WiFi source 8, and the WiFi module 52 is also connected to the serial port to parallel port module 53. The WiFi module 52 is used to receive the seat rotation command (serial port signal) sent by the smart mobile terminal 7 and send it to the serial port to parallel port module 53. The smart mobile terminal 7 can be a mobile phone, tablet computer, notebook and other devices. The model of the WiFi module 52 is WG219.

[0039] The serial port to parallel port module 53 is connected to the CPU 54 . The model of the serial port to parallel port module 53 is US12003A14SWYDT. The module is used to receive the serial signal (seat rotation instruction) sent by the WiFi module 52 and convert it into a parallel signal according to a predetermined timing and send it to the CPU 54 .

[0040] The CPU 54 is connected to the power driving module 55 , and is used to perform logic operations on the parallel signals sent by the serial port to parallel port module 53 , and send the instructions after the logic operations to the power driving module 55 .

[0041] The power drive module 55 is connected to the rotary motor 9 via the rotary motor control circuit 56 . The power drive module 55 is used to control the rotary motor control circuit 56 according to the instructions after the logic operation of the CPU 54 , so as to control the rotary motor 9 .

[0042] In order to display the status of the car seat, the rotating motor control circuit board also includes an indicator light 57, which is connected to the CPU 54 and is used to receive instructions after logical operations sent by the CPU 54 to display the rotation status of the car seat. The indicator light 57 is also connected to the voltage conversion module 51, and the voltage conversion module 51 is used to supply power to the indicator light 57.

[0043] The following is explained by taking three positioning grooves 111 as an example. Corresponding to the positioning grooves 111, the number of reed switches is also three, namely the first reed switch S1 at the 0° position, the second reed switch S2 at the 90° position and the third reed switch S3 at the 180° position.

[0044] The power driving module 55 includes a first output port 551 , a second output port 552 and a third output port 553 .

[0045] Figure 9a-9c The three states of the equivalent circuit of the rotating electrical machine control circuit are shown; among them, Figure 9a shows the initial state of the rotating motor control circuit, Figure 9b Shows the state of the rotating motor control circuit starting to move, Fig.9c It shows the final state of the rotating motor control circuit after the movement.

[0046] The rotating motor control circuit includes a first relay K1 and a second relay K2. The first relay includes a first coil, a first static contact, a second static contact and a first moving contact. The second relay K2 includes a second coil, a third static contact, a fourth static contact and a second moving contact. One end of the first coil is connected to the first output port 551, and the other end of the first coil is connected to one end of the second reed switch S2 and one end of the third reed switch S3 respectively. The other end of the second reed switch S2 is connected to the second output port 552 and the second coil respectively. The other end of the third reed switch S3 is connected to the third output port 553 and the fourth static contact. One end of the second coil is connected to the second output port 552, and the other end of the second coil is connected to one end of the first reed switch S1. The other end of the first reed switch S1 is connected to the third output port 553. The second static contact and the third static contact are grounded respectively. The first moving contact is connected to the first pin 91 of the rotating motor, and the second moving contact is connected to the second pin 92 of the rotating motor.

[0047] The potential of the power drive module 55 is shown in the following table:

[0048] Rotational action First output port 551 Second output port 552 The third output port 553 0° / 90°-180° + + - 90° / 180°-0° + - + 0°-90° - + -

[0049] The + sign in the above table indicates a high potential, and the - sign indicates a low potential.

[0050] In the initial state, the first pin 91 of the rotating motor is connected to the second output port 552, and the second pin 92 is grounded. At this time, the car seat is not rotated, and the magnet is located at the position of the first reed switch S1, triggering the first reed switch S1 to close, the coil of the second relay K2 to be energized, the moving contact of the second relay K2 to move and close with the fourth contact. When the car seat is rotated to a 90° position, the magnet rotates to the position of the second reed switch S2, triggering the second reed switch S2 to close, and the first reed switch S1 is disconnected. At this time, the coil of the relay K1 is energized, the moving contact of the first relay K1 to move and close with the second contact, the first pin 91 of the rotating motor is grounded, and the second pin 92 is connected to the third output port 553.

[0051] The above content describes the working process of the car seat rotating from 0° to 90°. The process of the car seat rotating from 0° or 90° to 180°, from 180° to 0, and from 0° to 90° can be obtained similarly.

[0052] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A positioning device for a rotating mechanism of a car seat, characterized in that: include: A static module fixed to the fixed part of the car seat and a dynamic module fixed to the rotating part of the car seat; wherein, The static module comprises a circular fixing bracket, positioning grooves are evenly opened along the circumferential direction at the outer edge of the fixing bracket, and mounting grooves are respectively opened at the position corresponding to each positioning groove at the inner edge of the fixing bracket, and a reed switch is respectively installed in each mounting groove, and the reed switch controls the rotating motor of the rotating part of the car seat through the rotating motor control circuit board; The moving module includes a moving bracket, a magnet and a slider, the moving bracket includes a shell and guide wings located on both sides of the shell, waist-shaped holes are respectively opened on the top and bottom surfaces of the shell, a sliding groove connected with the two waist-shaped holes and for the slider to slide is opened on the side of the shell facing the fixed bracket, a through hole is opened on the slider, the two ends of the magnet pass through the two waist-shaped holes, the middle part of the magnet is interference fit with the through hole, and a rubber band for tightening the top of the magnet is sleeved on the shell, so that the head of the slider is pressed against the fixed bracket; When the rotating part of the car seat drives the moving module on it to rotate, since the head of the slider does not move into the positioning groove, the distance between the magnet and the reed switch is greater than the sensing distance of the reed switch. When the seat rotates to a predetermined position, the head of the slider moves into the positioning groove opened on the fixed bracket, and the distance between the magnet and the reed switch is less than the sensing distance of the reed switch.

2. The positioning device for the rotating mechanism of a car seat according to claim 1, characterized in that: Chamfers are processed in the positioning groove and on the head of the sliding block respectively.

3. The positioning device for the rotating mechanism of a car seat according to claim 1, characterized in that: Guide rails are respectively arranged on the top surface of the sliding block at both sides of the through hole, and a guide groove for the guide rails to slide is opened on the top surface of the sliding groove.

4. The positioning device for the rotating mechanism of a car seat according to claim 1, characterized in that: The rotating motor control circuit board includes a voltage conversion module, a WiFi module, a serial port to parallel port module, a CPU, a power drive module and a rotating motor control circuit; wherein, The input interface of the voltage conversion module is connected to the vehicle body power supply, and the output port of the voltage conversion module is respectively connected to the WiFi module, the serial port to parallel port module, the CPU, and the power drive module; The WiFi module is in wireless communication with the vehicle-mounted WiFi source, and is used to receive a seat rotation instruction sent by a smart mobile terminal in wireless communication with the vehicle-mounted WiFi source, and the WiFi module is connected to the serial port to parallel port module, and is used to send the seat rotation instruction to the serial port to parallel port module; The serial port to parallel port module is connected to the CPU, and is used to receive the serial signal sent by the WiFi module and convert it into a parallel signal according to a predetermined timing and send it to the CPU; The CPU is connected to the power drive module, and is used to perform logic operations on the parallel signals sent by the serial port to parallel port module, and send the instructions after the logic operations to the power drive module; The power drive module is connected to the rotating motor through the rotating motor control circuit, and the power drive module is used to control the rotating motor control circuit according to the instructions after the CPU logic operation, so as to control the rotating motor; and The number of the positioning grooves and the number of the reed switches are three respectively, and the three reed switches are a first reed switch located at a 0° position, a second reed switch located at a 90° position, and a third reed switch located at a 180° position; The power driving module includes a first output port, a second output port and a third output port; The rotating motor control circuit includes a first relay and a second relay, the first relay includes a first coil, a first static contact, a second static contact and a first moving contact, the second relay includes a second coil, a third static contact, a fourth static contact and a second moving contact, one end of the first coil is connected to the first output port, the other end of the first coil is connected to one end of the second reed switch and the third reed switch respectively, the other end of the second reed switch is connected to the second output port and the second coil respectively, the other end of the third reed switch is connected to the third output port and the fourth static contact, one end of the second coil is connected to the second output port, the other end of the second coil is connected to one end of the first reed switch, the other end of the first reed switch is connected to the third output port, the second static contact and the third static contact are grounded respectively, the first moving contact is connected to the first pin of the rotating motor, and the second moving contact is connected to the second pin of the rotating motor.

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