A motor driver applied to screen angle adjustment of automobile seat backrest

Abstract

The application discloses a motor driver applied to screen angle adjustment of a car seat backrest, which comprises a driving motor, a driving screw rod, a backrest support rotatably installed on the car seat backrest, a backrest support screw-mounted driver box, a motor cavity and a driving cavity formed in the driver box, the driving motor being clamped in the motor cavity, a turbine being rotatably installed in the driving cavity, a worm being connected with a motor shaft of the driving motor, a worm wheel being engaged with the worm, an inner thread through hole being formed in a core portion of the worm wheel, the driving screw rod being screwed with the inner thread through hole, and a support connecting end being arranged at one end portion of the driving screw rod; the driving motor is a brush DC motor, a motor shell of the driving motor comprises a casing and a rear end cover, a permanent magnet is arranged on an inner wall of the casing, an iron core and a commutator are tightly sleeved on an outer periphery of the motor shaft, a control circuit board is arranged on the rear end cover, and the control circuit board is electrically connected with a Hall sensor. The application has the advantages of novel design, simple structure, convenient assembly and connection, and can realize accurate adjustment of screen overturning angle.

Description

Technical Field

[0001] This invention relates to the field of motor driver technology, and more particularly to a motor driver for adjusting the screen angle of an automobile seat back. Background Technology

[0002] For a screen installed on the back of a car seat, it includes a screen bracket for supporting the screen. The screen bracket is rotatably mounted on the back of the car seat. The back of the car seat is equipped with a motor driver corresponding to the screen bracket. The motor driver drives the screen bracket to rotate to achieve screen angle adjustment.

[0003] Among them, the Chinese utility model patent with patent number ZL202323601828.6 and patent name: "An Electric Screen Structure for Car Seats and a Car Seat", substantially discloses a car seat screen adjustment device; specifically, the electric screen structure for car seats discloses the following technical solution: an electric screen structure for car seats, including a support frame and a drive assembly, the support frame being rotatably mounted on the back of the seat back; the drive assembly having a motor, a lead screw and a pusher, the pusher being guided by a guide member for linear motion, the motor being fixed inside the back of the car seat, the lead screw being connected to the output end of the motor, the lead screw being threadedly connected to the pusher, and one end of the pusher being connected to the support frame; the support frame including a rotating shaft, a support rod, and a buffer member, the rotating shaft being rotatably inserted into the back of the seat, one end of the support rod being fixed to the rotating shaft, one end of the buffer member being rotatably pivotally connected to the support rod, and the other end of the buffer member being rotatably pivotally connected to the pusher member.

[0004] When the electric screen structure for the car seat is activated, the motor drives the pusher to move linearly along the guide via a lead screw. During this process, the pusher drives the load-bearing rod to rotate around the pivot point via a buffer, thereby adjusting the angle of the entire load-bearing frame and the screen angle.

[0005] It should be noted that the above-mentioned electric screen structure for car seats still has the following drawbacks, specifically: Defect 1: The motor is fixedly mounted on the back of the car seat, and the motor drives the pusher component to reciprocate linearly via a lead screw. To ensure that the linearly reciprocating pusher component can drive the load-bearing frame on which the screen is mounted to rotate, a linkage structure must be installed between the pusher component and the load-bearing frame. Furthermore, a buffer component of the linkage structure is pivotally connected to both the pusher component and the load-bearing frame. Additionally, to ensure that the pusher component accurately performs its linear reciprocating motion, a guide component must be provided to guide it. Therefore, the above-mentioned electric screen structure for car seats suffers from complex structural design and inconvenient assembly and connection. Defect 2: The electric screen structure used in car seats cannot achieve precise adjustment of the screen flip angle. Summary of the Invention

[0006] The purpose of this invention is to provide a motor driver for adjusting the screen angle of a car seat back, which addresses the shortcomings of existing technologies. This motor driver for adjusting the screen angle of a car seat back has a novel design, simple structure, and is easy to assemble and connect, and can achieve precise adjustment of the screen rotation angle.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions.

[0008] A motor driver for adjusting the screen angle of a car seat back includes a drive motor and a drive screw. The motor driver used for screen angle adjustment on the back of a car seat also includes a backrest support that is rotatably mounted on the back of the car seat. The backrest support is screwed onto a driver housing. The driver housing has a motor cavity and a drive cavity that communicates with the motor cavity. The drive motor is fixedly installed in the motor cavity of the driver housing. A turbine is rotatably installed inside the drive chamber of the drive housing. The motor shaft of the drive motor is connected to a worm gear that extends into the drive chamber. The worm wheel meshes with the worm gear. The core of the worm wheel has an axially penetrating internal threaded through hole. The drive screw is screwed into the internal threaded through hole of the worm wheel. The drive screw passes through the drive housing and the backrest support respectively. One end of the drive screw is provided with a bracket connection end that connects to the screen bracket. The drive motor is a brushed DC motor, and includes a motor housing with an internal cavity. The motor housing includes a casing and a rear end cover mounted at the rear end of the casing. The cavity is formed by the casing and the rear end cover. A permanent magnet is installed on the inner wall of the casing, and the motor shaft is located inside the permanent magnet. An iron core and a commutator are fastened to the periphery of the motor shaft. A coil winding is wrapped around the iron core and electrically connected to the commutator. The rear end cover is equipped with a brush holder and a control circuit board located in the cavity. The brush holder is equipped with carbon brushes that are electrically connected to the control circuit board and in contact with the commutator. A Hall sensor is electrically connected to the control circuit board.

[0009] The driver housing includes a main housing and a cover connected to the main housing. The motor cavity and the drive cavity are respectively enclosed by the main housing and the cover. The drive motor is fixed between the main housing and the cover. The drive screw passes through the main housing and the cover. One end of the worm gear is rotatably connected to the main housing via a ball bearing, and the other end of the worm gear is rotatably connected to the housing cover via a ball bearing.

[0010] The main body of the box is fastened to the box cover; The motor driver used for adjusting the screen angle of a car seat back also includes a U-shaped fixing plate, which is screwed to the backrest support, and the end of the driver housing located on the drive cavity side is clamped by the U-shaped fixing plate.

[0011] The motor housing is fitted with several auxiliary rubber rings arranged at intervals in sequence, which are fastened between the motor housing and the driver housing.

[0012] The drive screw has a screw pivot hole at the bracket connection end, and a limit nut is screwed onto the end of the drive screw away from the bracket connection end.

[0013] An auxiliary rubber pad is installed between the backrest support and the drive unit housing, and the auxiliary rubber pad is clamped between the backrest support and the drive unit housing.

[0014] The backrest support is provided with support pivot parts on both sides directly opposite the driver housing, and each support pivot part is provided with a support pivot hole.

[0015] The rear cover is provided with a connector, and the electrical terminals of the connector are electrically connected to the control circuit board.

[0016] Compared with the prior art, the present invention has the following beneficial effects, specifically: 1. This invention drives the screen bracket to rotate via a drive motor, worm gear, worm wheel, and drive screw, with the bracket connection end of the drive screw directly connected to the screen bracket. Compared to existing technologies, the overall structure of this invention is simpler. During assembly, it is only necessary to connect the bracket connection end of the drive screw to the screen bracket and rotate the backrest support onto the car seat back, making assembly and connection convenient. 2. This invention uses a Hall sensor to detect the rotation angle of the drive motor, so as to achieve precise control of the screen bracket rotation angle; 3. Therefore, the motor driver of the present invention for adjusting the screen angle of a car seat back has the advantages of novel design, simple structure and convenient assembly and connection, and can achieve precise adjustment of the screen flip angle. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention.

[0018] Figure 1 This is a schematic diagram of the structure of the present invention.

[0019] Figure 2 This is a structural schematic diagram from another perspective of the present invention.

[0020] Figure 3 This is an exploded view of the present invention.

[0021] Figure 4 This is a cross-sectional schematic diagram of the present invention.

[0022] Figure 5 This is a schematic diagram of the drive motor of the present invention.

[0023] Figure 6 This is an exploded view of the drive motor of the present invention.

[0024] exist Figures 1 to 6 This includes: 1-Drive motor; 11-Motor shaft; 12-Motor housing; 121-Housing; 122-Rear end cover; 13-Permanent magnet; 14-Iron core; 15-Commutator; 16-Coil winding; 171-Carbon brush holder; 172-Carbon brush; 18-Control circuit board; 19-Hall sensor; 110-Connector; 111-Power terminal; 2-Drive screw; 21-Bracket connection end; 211-Screw pivot hole; 22-Limit nut; 3-Backrest support; 31-Support pivot part; 32-Support pivot hole; 4-Driver housing; 41-Motor cavity; 42-Drive cavity; 43-Main housing; 44-Cover; 5-Worm gear; 51-Internal threaded through hole; 6-Worm; 7-Ball bearing; 8-U-shaped fixing plate; 91-Auxiliary rubber ring; 92-Auxiliary rubber pad. Detailed Implementation

[0025] The present invention will now be described in conjunction with specific embodiments.

[0026] Example 1, as Figures 1 to 4 As shown, a motor driver for adjusting the screen angle of a car seat back includes a drive motor 1 and a drive screw 2.

[0027] Among them, such as Figures 1 to 4 As shown, the motor driver used for adjusting the screen angle of the car seat back also includes a backrest support 3 that is rotatably mounted on the car seat back. The backrest support 3 is screwed onto the inherent driver housing 4. The driver housing 4 has a motor cavity 41 and a drive cavity 42 that communicates with the motor cavity 41 inside. The drive motor 1 is fixedly installed in the motor cavity 41 of the driver housing 4.

[0028] Furthermore, such as Figure 3 and Figure 4As shown, a turbine is rotatably installed in the drive cavity 42 of the driver housing 4. The motor shaft 11 of the drive motor 1 is connected to a worm 6 that extends into the drive cavity 42. The worm wheel 5 meshes with the worm 6. The core of the worm wheel 5 has an axially penetrating internal threaded through hole 51. The drive screw 2 is screwed into the internal threaded through hole 51 of the worm wheel 5. The drive screw 2 passes through the driver housing 4 and the backrest support 3 respectively. One end of the drive screw 2 is provided with a bracket connection end 21 that is connected to the screen bracket.

[0029] Furthermore, such as Figure 5 and Figure 6 As shown, the drive motor 1 is a brushed DC motor, and the drive motor 1 includes a motor housing 12. The motor housing 12 has a housing cavity formed inside. The motor housing 12 includes a shell 121 and a rear end cover 122 installed at the rear end of the shell 121. The housing cavity is formed by the shell 121 and the rear end cover 122. A permanent magnet 13 is installed on the inner wall of the shell 121. The motor shaft 11 is located inside the permanent magnet 13. An iron core 14 and a commutator 15 are fastened to the periphery of the motor shaft 11. A coil winding 16 is wrapped around the iron core 14. The coil winding 16 is electrically connected to the commutator 15. The rear end cover 122 is equipped with a carbon brush holder 171 and a control circuit board 18 located in the housing cavity. The carbon brush holder 171 is equipped with carbon brushes 172 that are electrically connected to the control circuit board 18 and in contact with the commutator 15. A Hall sensor 19 is electrically connected to the control circuit board 18.

[0030] It should be noted that, as Figures 1 to 4 As shown, the backrest support 3 of this embodiment can be rotatably installed on the back of a car seat in the following manner: The backrest support 3 has support pivot portions 31 on both sides directly opposite the drive housing 4. Each support pivot portion 31 has a support pivot hole 32, and each support pivot hole 32 is pivotally connected to the car seat back via a pivot. Of course, the above-described rotatable installation method of the backrest support 3 does not constitute a limitation on this embodiment.

[0031] In the application of the motor driver for adjusting the screen angle of a car seat back in this embodiment, the support connecting seat of the drive screw 2 is connected to the screen bracket. During operation, the drive motor 1 drives the worm 6 to rotate synchronously via its motor shaft 11. Since the worm 6 meshes with the worm wheel 5 and the drive screw 2 is screwed into the internal threaded through hole 51 of the worm wheel 5, the worm 6 drives the worm wheel 5 to rotate. The rotating worm wheel 5 causes the drive screw 2 to move along the axis of the worm wheel 5. The drive screw 2, which reciprocates axially relative to the worm wheel 5, drives the screen bracket to rotate, thereby achieving screen angle adjustment. During the process of the drive screw 2 driving the screen bracket to rotate and achieve angle adjustment, since the driver housing 4 is screwed and fastened to the backrest support 3, the backrest support 3 will rotate adaptively relative to the car seat back.

[0032] It should be further pointed out that the motor shaft 11 of the drive motor 1 achieves torque increase and speed reduction through the reduction transmission pair composed of the worm 6 and the worm wheel 5, and the thread transmission pair composed of the internal thread through hole 51 of the drive screw 2 and the worm wheel 5, so as to meet the requirements of thrust and low-speed smooth movement when adjusting the screen flip angle.

[0033] It should be emphasized that in this embodiment, the screen bracket is driven to rotate via a drive motor 1, a worm gear 6, a worm wheel 5, and a drive screw 2, and the bracket connection end 21 of the drive screw 2 is directly connected to the screen bracket. Compared with the prior art, the overall structure of the motor driver used for screen angle adjustment on a car seat back in this embodiment is simpler. During assembly and connection, it is only necessary to connect the bracket connection end 21 of the drive screw 2 to the screen bracket and rotate the backrest support 3 onto the car seat back, making assembly and connection convenient.

[0034] It should be further emphasized that, for the drive motor 1 in this embodiment, when the drive motor 1 is in operation, the Hall sensor 19 collects the phase position information of the rotor and feeds the information back to the control circuit board 18. The control circuit board 18 analyzes and processes the information fed back by the Hall sensor 19 and determines the position and rotation angle of the rotor, thereby realizing the detection of the rotation angle of the drive motor 1. Since there is a linear relationship between the rotation angle of the drive motor 1 and the rotation angle of the screen bracket, the rotation angle of the screen bracket can be accurately known by detecting the rotation angle of the drive motor 1, so as to realize precise control of the rotation angle of the screen bracket.

[0035] In summary, the motor driver for adjusting the screen angle of a car seat backrest, as described in this embodiment, has the advantages of novel design, simple structure, and convenient assembly and connection, and can achieve precise adjustment of the screen flip angle.

[0036] Example 2, as Figures 1 to 4 As shown, the difference between this embodiment 2 and embodiment 1 is that: the driver housing 4 includes a main housing 43 and a housing cover 44 connected to the main housing 43. The motor cavity 41 and the drive cavity 42 are respectively enclosed by the main housing 43 and the housing cover 44. The drive motor 1 is fixed between the main housing 43 and the housing cover 44. The drive screw 2 passes through the main housing 43 and the housing cover 44.

[0037] One end of the worm gear 5 is rotatably connected to the main housing 43 via a ball bearing 7, and the other end of the worm gear 5 is rotatably connected to the housing cover 44 via a ball bearing 7.

[0038] Example 3, as Figures 1 to 4 As shown, the difference between this embodiment 3 and embodiment 2 is that the main body 43 and the cover 44 are fastened together.

[0039] The motor driver used for adjusting the screen angle of the car seat back also includes a U-shaped fixing plate 8, which is screwed to the backrest support 3, and the end of the driver housing 4 located on the drive cavity 42 side is clamped by the U-shaped fixing plate 8.

[0040] As for the U-shaped fixing plate 8 in this embodiment, it can clamp the main box 43 and the box cover 44 to improve the stability and reliability of the fastening assembly between the main box 43 and the box cover 44.

[0041] Example 4, as Figure 3 As shown, the difference between this embodiment four and embodiment two is that: the outer periphery of the motor housing 12 is fitted with a number of auxiliary rubber rings 91 arranged sequentially at intervals, and the auxiliary rubber rings 91 are fastened between the motor housing 12 and the driver housing 4.

[0042] The auxiliary rubber ring 91 fitted onto the motor housing 12 serves to dampen vibrations and reduce the transmission of vibrations from the drive motor 1 to the driver housing 4.

[0043] Example 5, such as Figures 1 to 4 As shown, the difference between this fifth embodiment and the first embodiment is that the support connection end 21 of the drive screw 2 is provided with a screw pivot hole 211, and a limit nut 22 is screwed onto the end of the drive screw 2 away from the support connection end 21.

[0044] When the drive screw 2 extends to its limit position relative to the drive housing 4, the limit nut 22 abuts against the limit position of the drive housing 4; the limit nut 22 can play the role of limiting and preventing disengagement, so as to avoid the problem of the drive screw 2 falling off due to excessive extension.

[0045] Example 6, as Figure 3 and Figure 4 As shown, the difference between this sixth embodiment and the first embodiment is that an auxiliary rubber pad 92 is installed between the backrest support 3 and the driver housing 4, and the auxiliary rubber pad 92 is clamped between the backrest support 3 and the driver housing 4.

[0046] For the auxiliary rubber pad 92 in this embodiment, it is equivalent to a shock-absorbing buffer layer structure. When an external force is applied to the screen bracket, the screen bracket transmits the external force to the driver housing 4 through the drive screw 2. The auxiliary rubber pad 92 located between the backrest support 3 and the driver housing 4 can play a buffering and protective role.

[0047] Example 7, as Figure 5 and Figure 6 As shown, the difference between this embodiment seven and embodiment one is that the rear cover 122 is provided with a connector 110, and the power terminal 111 of the connector 110 is electrically connected to the control circuit board 18.

[0048] When using the connector 110 in this embodiment 7, the connector 110 is electrically connected to the corresponding controller through a signal transmission line to realize screen angle control.

[0049] The above description is only a preferred embodiment of the present invention. For those skilled in the art, there will be changes in the specific implementation and application scope based on the ideas of the present invention. The content of this specification should not be construed as a limitation of the present invention.

Claims

1. A motor driver for adjusting the screen angle of a car seat backrest, comprising a drive motor (1) and a drive screw (2). Its features are: The motor driver used for screen angle adjustment on the back of a car seat also includes a backrest support (3) that is rotatably mounted on the back of the car seat. The backrest support (3) is screwed onto the inherent driver housing (4). The driver housing (4) has a motor cavity (41) and a drive cavity (42) that communicates with the motor cavity (41). The drive motor (1) is fixedly installed in the motor cavity (41) of the driver housing (4). A turbine is rotatably installed in the drive chamber (42) of the driver housing (4). The motor shaft (11) of the drive motor (1) is connected to a worm (6) that extends into the drive chamber (42). The worm wheel (5) meshes with the worm (6). The core of the worm wheel (5) has an axially penetrating internal threaded through hole (51). The drive screw (2) is screwed into the internal threaded through hole (51) of the worm wheel (5). The drive screw (2) passes through the driver housing (4) and the backrest support (3) respectively. One end of the drive screw (2) is provided with a bracket connection end (21) that is connected to the screen bracket. The drive motor (1) is a brushed DC motor, and the drive motor (1) includes a motor housing (12). The motor housing (12) has a housing cavity formed inside. The motor housing (12) includes a shell (121) and a rear end cover (122) installed at the rear end of the shell (121). The housing cavity is formed by the shell (121) and the rear end cover (122). A permanent magnet (13) is installed on the inner wall of the shell (121). The motor shaft (11) is located inside the permanent magnet (13). The outer periphery is fastened with an iron core (14) and a commutator (15). The iron core (14) is wrapped with a coil winding (16), and the coil winding (16) is electrically connected to the commutator (15). The rear end cover (122) is equipped with a carbon brush holder (171) and a control circuit board (18) located in the housing cavity. The carbon brush holder (171) is equipped with carbon brushes (172) that are electrically connected to the control circuit board (18) and in contact with the commutator (15). The control circuit board (18) is electrically connected to a Hall sensor (19).

2. The motor driver for adjusting the screen angle of a car seat backrest according to claim 1, characterized in that: The driver housing (4) includes a main housing (43) and a cover (44) connected to the main housing (43). The motor cavity (41) and the drive cavity (42) are respectively enclosed by the main housing (43) and the cover (44). The drive motor (1) is fixed between the main housing (43) and the cover (44). The drive screw (2) passes through the main housing (43) and the cover (44). One end of the worm gear (5) is rotatably connected to the main housing (43) via a ball bearing (7), and the other end of the worm gear (5) is rotatably connected to the housing cover (44) via a ball bearing (7).

3. A motor driver for adjusting the screen angle of a car seat back, as described in claim 2, characterized in that: The main body (43) is fastened to the lid (44); The motor driver used for adjusting the screen angle of the car seat back also includes a U-shaped fixing plate (8), which is screwed to the backrest support (3), and the end of the driver housing (4) located on the side of the drive cavity (42) is clamped by the U-shaped fixing plate (8).

4. A motor driver for adjusting the screen angle of a car seat back, as described in claim 2, characterized in that: The outer periphery of the motor housing (12) is fitted with a number of auxiliary rubber rings (91) arranged at intervals in sequence, and the auxiliary rubber rings (91) are fastened between the motor housing (12) and the driver housing (4).

5. A motor driver for adjusting the screen angle of a car seat back as described in claim 1, characterized in that: The drive screw (2) has a screw pivot hole (211) at the bracket connection end (21) and a limit nut (22) is screwed onto the end of the drive screw (2) away from the bracket connection end (21).

6. A motor driver for adjusting the screen angle of a car seat back as described in claim 1, characterized in that: An auxiliary rubber pad (92) is installed between the backrest support (3) and the drive housing (4), and the auxiliary rubber pad (92) is clamped between the backrest support (3) and the drive housing (4).

7. A motor driver for adjusting the screen angle of a car seat backrest according to claim 1, characterized in that: The backrest support (3) is provided with support pivot parts (31) on both sides directly opposite the driver housing (4), and each support pivot part (31) is provided with a support pivot hole (32).

8. A motor driver for adjusting the screen angle of a car seat back as described in claim 1, characterized in that: The rear cover (122) is provided with a connector (110), and the power terminal (111) of the connector (110) is electrically connected to the control circuit board (18).

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