Mirror surface driver of automobile rearview mirror

Abstract

The automobile rearview mirror surface driver comprises a bottom shell and an upper cover, a motor is arranged in the bottom shell, a worm is arranged at the output end of the motor, the output end of the motor is in transmission connection with a transmission gear through the worm, the other end of the transmission gear is in transmission connection with a clutch gear, and the clutch gear comprises a bevel gear, a rotating shaft and an elastic piece; the helical gear is in transmission connection with the transmission gear, the outer side and the inner side of the elastic piece are provided with a first convex part and a second convex part respectively, the helical gear is provided with a first groove, the rotating shaft is provided with a second groove, the second groove can be connected with the second convex part, the first groove and the second groove are both L-shaped grooves, and the bending directions of the first groove and the second groove are opposite. And a guide part is obliquely arranged on the second groove. During installation, the elastic piece can be installed in the bevel gear firstly, then the rotating shaft penetrates through the bevel gear, the rotating shaft is rotated for installation, the abutting effect of the elastic piece on the bevel gear and the rotating shaft can be guaranteed while installation is convenient, and the transmission effect is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile rearview mirror, in particular to an automobile rearview mirror mirror surface driver. BACKGROUND

[0002] The automobile rearview mirror is a car accessory for the driver to observe the running state of the rear vehicle and pedestrian during driving. The current automobile rearview mirror can adjust the angle of the rearview mirror through the driver to ensure that the driver can observe the field of view in a specific direction, thereby facilitating safe driving.

[0003] The automobile rearview mirror mirror surface driver is usually adjusted by cooperating with a straight strip gear or an arc-shaped gear through a speed reduction transmission device, which usually includes a motor, a worm gear, a worm and a multi-stage gear transmission.

[0004] In the prior art, in order to overcome the technical problem that the rotation shaft driven by the gear transmission rotates to the limit position to cause the mirror surface to break, a slipping mechanism is usually arranged between the transmission gears to make the transmission mechanism and the rotation shaft disengage, thereby releasing the transmission and ensuring that the mirror surface will not be broken due to the continued force of the transmission mechanism when it runs to the limit position. For example, the transmission assembly of a small passenger electric mirror surface driver disclosed in the Chinese patent with the announcement number CN218267070U and the publication date of January 10, 2023 discloses a transmission assembly of a small passenger electric mirror surface driver, which includes a base, a mirror surface floating plate arranged above the base, an arc-shaped gear and a transmission assembly installed on the base. The upper end of the arc-shaped gear is hingedly connected to the mirror surface floating plate, and the lower end is installed on the base. The arc-shaped gear moves around the center axis A and is driven by the transmission assembly. The transmission assembly includes a motor, a main transmission member and a secondary transmission member. The axis B of the motor output shaft is perpendicular to the center axis A around which the arc-shaped gear moves. The center axes C and D of the main transmission member and the secondary transmission member are parallel to the center axis A around which the arc-shaped gear moves. The main transmission member is located below the motor output worm, and the secondary transmission member is located above the main transmission member.

[0005] The secondary transmission member in the above-mentioned application includes a rotating shaft, a positioning gasket, a secondary transmission worm gear and an output gear. The secondary transmission helical gear is connected to the rotating shaft through the positioning gasket, and the rotating shaft is movably connected to the earphone transmission helical gear. When the output gear is output to the limit position, the slipping effect can be achieved.

[0006] For the related technology in the above, the inventor believes that the application needs to put the rotating shaft and press the positioning gasket into the two sides of the secondary transmission helical gear during installation, and also needs to rotate the positioning gasket or the rotating shaft by a certain angle, which makes the assembly more complex. Therefore, it is necessary to design an automobile rearview mirror mirror surface driver which is easy to install. CONTENT OF THE UTILITY MODEL

[0007] The present application provides an automobile rearview mirror mirror surface driver which is easy to install.

[0008] The application provides a mirror surface driver of an automobile rearview mirror.

[0009] The application provides a mirror surface driver of an automobile rearview mirror. The mirror surface driver of the automobile rearview mirror comprises a bottom shell and an upper cover, a motor is arranged in the bottom shell, a worm is arranged on an output end of the motor and a transmission gear is connected to the worm through transmission, a clutch gear is connected to another end of the transmission gear, the clutch gear comprises a helical gear, a rotating shaft and a spring sheet, the helical gear is connected to the transmission gear in transmission, a rack is connected to the rotating shaft in transmission, end portions of the rack extend out of the upper cover and are connected to a movable ring, the helical gear is arranged on the rotating shaft in transmission and is fixed through the spring sheet, first and second convex portions are arranged on the outer side and the inner side of the spring sheet respectively, a first recess is arranged on the helical gear, the first recess can be clamped with the first convex portion, a second recess is arranged on the rotating shaft, the second recess can be connected with the second convex portion, the first and second recesses are L-shaped grooves and the bending directions of the first and second recesses are opposite, a guide portion is arranged on the second recess in an inclined manner, and the second convex portion can slide into the second recess through the guide portion.

[0010] Preferably, the spring sheet is an annular sheet made of elastic metal material, the spring sheet is arranged concentrically with the rotating shaft, one side of the spring sheet is concave, and the concave side faces the helical gear, the first and second convex portions are multiple, and the first and second recesses are multiple and are arranged uniformly along the circumferences of the helical gear and the rotating shaft respectively.

[0011] Preferably, the circumferential positions of the first and second convex portions are the same.

[0012] Preferably, an annular limiting portion is arranged on the inner side of the helical gear, one end of the rotating shaft connected to the spring sheet passes through the annular limiting portion, the other end of the rotating shaft is connected to the rack in transmission, the rack is arc-shaped and is clamped in the bottom shell.

[0013] Preferably, a protruding anti-falling portion is arranged at the bending position of the second recess, and the side surface of the anti-falling portion is connected to the guide portion.

[0014] Preferably, a recess is arranged in the middle portion of the upper cover, a central support plate is arranged in the recess, the central support plate is shuttle-shaped, third and fourth recesses are arranged on the inner side of the movable ring, the third and fourth recesses are L-shaped and the bending directions of the third and fourth recesses are opposite, and the two ends of the central support plate are connected to the third and fourth recesses respectively.

[0015] Preferably, a plurality of fixing protrusions are arranged in the bottom shell, and recesses are arranged on the fixing protrusions and connected with the motor, the transmission gear, the bevel gear, the rotating shaft and the rack.

[0016] Preferably, the edge of the upper cover is clamped with the bottom shell through buckling, and the middle part of the central support plate is provided with buckles and clamped with the upper cover through the buckles.

[0017] Preferably, a plurality of arc-shaped pieces are arranged at the lower edge of the movable ring at intervals, the shape of the arc-shaped pieces is the same as that of the lower part of the bottom shell, a fifth recess is arranged in the upper part of the movable ring, the fifth recess is L-shaped, and the end of the rack is clamped with the fifth recess.

[0018] Preferably, the bottom shell is a concave shell structure, the upper side of the bottom shell is provided with the fixing protrusions, the lower side of the bottom shell is provided with a PCB electric control board and a spring plate, the bottom of the bottom shell is clamped with a bottom cover, the center of the bottom shell, the central support plate, the spring plate and the bottom cover is provided with a through hole, a screw sleeve is arranged in the through hole, and a fastening screw is arranged in the screw sleeve.

[0019] In summary, the present application has at least one of the following beneficial technical effects:

[0020] 1. The first recess is arranged on the bevel gear of the clutch gear, the first protrusion on the elastic sheet is clamped through the first recess, the elastic sheet is fixed with the bevel gear, then the rotating shaft is inserted through the bevel gear and the rotating shaft is rotated, the second recess is matched with the second protrusion for installation, since the first recess and the second recess are L-shaped grooves and the bending directions of the L-shaped grooves are opposite, the first protrusion is in abutment with the first recess in the process that the second recess is matched with the second protrusion on the rotating shaft, the angle of the elastic sheet is fixed, and the second recess is provided with a guide portion, the second protrusion is slid into the second recess through the guide portion to realize installation, and finally the rotating shaft is reversely rotated to separate the first protrusion from the recess, so as to realize the clamping effect of the elastic sheet on the bevel gear and the rotating shaft and ensure the transmission effect.

[0021] 2. The elastic sheet is set as an inner concave annular sheet, and the second convex part and the first convex part are uniformly arranged on the inner and outer sides of the elastic sheet in the circumferential direction, so as to ensure stable support of the elastic sheet; the circumferential positions of the first convex part and the second convex part are the same, and due to the opposite directions of the first groove and the second groove, the elastic sheet is first clamped in the first groove through the first convex part during installation, and then the rotating shaft is inserted and rotated, the second convex part enters the second groove through the guide part during the rotating process, the first convex part is separated from the first groove after the second convex part abuts against the second groove, the tightening operation of the rotating shaft and the helical gear is realized, and installation is convenient; the anti-disengagement part arranged in the second groove can limit the second convex part sliding into the second groove and avoid disengagement; and due to the inner concave side of the elastic sheet, the side surface of the first convex part can be clamped in the first groove when the first convex part is separated from the first groove, so as to ensure the positioning effect.

[0022] 3. The central support plate is arranged on the upper cover, and two groups of motors, transmission gears, helical gears, rotating shafts and racks are symmetrically arranged on the two sides of the central support plate, so as to ensure the support and adjustment effects; the central support plate is connected with the upper cover through the buckle connection of the upper cover and the bottom shell, the overall structure is compact, and the connection is close; the arc-shaped sheet is arranged on the outer side of the movable ring, and the third groove, the fourth groove and the fifth groove are arranged on the upper part of the movable ring, so as to facilitate the connection of the central support plate and the rack; the spring plate is arranged on the lower side of the bottom shell, and the screw sleeve and the fastening screw are arranged on the bottom shell, the central support plate and the bottom cover, so as to ensure the installation effect. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a perspective view of the automobile rearview mirror surface driver in the preferred embodiment of the application.

[0024] Figure 2 It is an exploded view of the automobile rearview mirror surface driver in the preferred embodiment of the application.

[0025] Figure 3 It is a structural schematic view of the bottom shell in the preferred embodiment of the application.

[0026] Figure 4 It is a structural schematic view of the bottom shell from another perspective in the preferred embodiment of the application.

[0027] Figure 5 It is a perspective view of the transmission structure in the preferred embodiment of the application.

[0028] Figure 6 It is a front view of the transmission structure in the preferred embodiment of the application.

[0029] Figure 7 It is an exploded view of the clutch gear in the preferred embodiment of the application.

[0030] Figure 8 It is a structural schematic view of the transmission shaft in the preferred embodiment of the application.

[0031] Figure 9 is a structure schematic diagram of the clutch gear installation in the preferred embodiment of the application.

[0032] Figure 10 is a structure schematic diagram of the clutch gear installation in the preferred embodiment of the application.

[0033] Figure 11 is a structure schematic diagram of the clutch gear installation in the preferred embodiment of the application.

[0034] Mark explanation: 1, bottom shell; 101, fixed tab; 102, PCB control board; 103, spring plate; 2, upper cover; 201, central support part; 3, worm; 4, transmission gear; 5, clutch gear; 501, bevel gear; 501a, first groove; 502, rotating shaft; 502a, second groove; 502b, guide part; 502c, anti-off part; 503, spring piece; 503a, first convex part; 503b, second convex part; 6, rack; 7, movable ring; 701, third groove; 702, fourth groove; 703, fifth groove; 8, bottom cover. DETAILED DESCRIPTION

[0035] The application will be further described in detail below with reference to the accompanying drawings.

[0036] The application discloses a mirror surface driver of an automobile rearview mirror.

[0037] Reference Figures 1 to 5 A mirror surface driver of an automobile rearview mirror, comprising a bottom shell 1 and an upper cover 2, a motor (not shown in the figure) is arranged in the bottom shell 1, a worm 3 is arranged on the output end of the motor and is drivingly connected with a transmission gear 4 through the worm 3, the other end of the transmission gear 4 is drivingly connected with a clutch gear 5, the clutch gear 5 comprises a bevel gear 501, a rotating shaft 502 and a spring piece 503, the bevel gear 501 is drivingly connected with the transmission gear 4, the rotating shaft 502 is drivingly connected with a rack 6, the end part of the rack 6 extends out of the upper cover 2 and is connected with a movable ring 7, specifically, a plurality of fixed tabs 101 are arranged in the bottom shell 1, grooves are arranged on the fixed tabs 101 and the grooves are positioned and clamped with the motor, the transmission gear 4, the bevel gear 501, the rotating shaft 502 and the rack 6, the edge of the upper cover 2 is clamped with the bottom shell 1 through buckles, a recess is arranged in the middle part of the upper cover 2 and a central support plate 201 is arranged in the recess, the central support plate 201 is in the shape of a shuttle, buckles are arranged on the two sides of the middle part of the central support plate 201 and the central support plate 201 is clamped with the upper cover 2 through the buckles, the transmission gear 4, the bevel gear 501, the rotating shaft 502 and the rack 6 are all in two groups and are symmetrically arranged on the left and right sides of the bottom shell 1 with the central support plate 201 as the axis of symmetry.

[0038] Reference Figures 1 to 4The bottom shell 1 is a concave shell structure, the upper side of the bottom shell 1 is provided with a fixed flange 101, the lower side of the bottom shell 1 is provided with a PCB electric control board 102 and a spring plate 103, the bottom of the bottom shell 1 is clamped with a bottom cover 8, the center of the bottom shell 1, the central support plate 201, the spring plate 103 and the bottom cover 8 is provided with a through hole, a screw sleeve is arranged in the through hole, and a fastening screw is arranged in the screw sleeve; the upper inner side of the movable ring 7 is provided with a third groove 701 and a fourth groove 702, the third groove 701 and the fourth groove 702 are both L-shaped and the bending directions of the third groove 701 and the fourth groove 702 are opposite, the two ends of the central support plate 201 are connected with the third groove 701 and the fourth groove 702 respectively, a plurality of arc-shaped pieces 703 are arranged at the lower edge of the movable ring 7 in a spaced manner, the shape of the arc-shaped piece 703 is the same as that of the lower part of the bottom shell 1, a fifth groove 704 is arranged in the upper part of the movable ring 7, the fifth groove 704 is L-shaped, and the end of the rack 6 is clamped with the fifth groove 704, specifically, the end of the rack 6 and the central support plate 201 are both provided with a spherical connector.

[0039] With reference to Figures 5 to 8 The inner side of the helical gear 501 in the clutch gear 5 is provided with an annular limiting portion, one end of the rotating shaft 502 is connected with the elastic sheet 503 through the annular limiting portion, the other end of the rotating shaft 502 is in transmission connection with the rack 6, the rack 6 is arc-shaped and is clamped in the bottom shell 1, the helical gear 501 is arranged on the rotating shaft 502 and is fixed through the elastic sheet 503, the elastic sheet 503 is an annular piece made of elastic metal material, the elastic sheet 503 is concentrically arranged with the rotating shaft 502, one side of the elastic sheet 503 is concave, and the concave side faces the helical gear 501, the outer side and the inner side of the elastic sheet 503 are respectively provided with a first protruding portion 503a and a second protruding portion 503b, the first protruding portion 503a and the second protruding portion 503b are both a plurality of, specifically, the first protruding portion 503a and the second protruding portion 503b are both three and have the same circumferential position.

[0040] With reference to Figure 7 The helical gear 501 is provided with a first groove 501a, the first groove 501a can be clamped with the first protruding portion 503a, the rotating shaft 502 is provided with a second groove 502a, the second groove 502a can be connected with the second protruding portion 503b, the first groove 501a and the second groove 502a are both a plurality of and are uniformly arranged along the circumferences of the helical gear 501 and the rotating shaft 502 respectively, the first groove 501a and the second groove 502a are both L-shaped grooves and the bending directions of the first groove 501a and the second groove 502a are opposite, specifically, the first groove 501a is in a clockwise direction from right to left, and the second groove 502a is in an anticlockwise direction from right to left.

[0041] With reference to Figure 8, the second groove 502a is provided with a guide portion 502b, and the second protrusion 503b can slide into the second groove 502a through the guide portion 502b; the bending portion of the second groove 502a is provided with a protruding anti-disengagement portion 502c, the side surface of the anti-disengagement portion 502c is connected with the guide portion 502b, and the anti-disengagement portion 502b can limit the second protrusion 503b to avoid disengagement.

[0042] With reference to Figures 9 to 11 In the installation, the elastic sheet 503 can be first fixed by the first groove 501a and the first protrusion 503a on the elastic sheet 503, then the rotating shaft 502 is inserted into the bevel gear 501, and in the process of insertion, the second protrusion 503a enters the second groove 502a, because the side surface of the second groove 502a is provided with the guide portion 502b, the second protrusion 503a can be pressed into the second groove 502a by rotating the rotating shaft 502, and because the bending directions of the first groove 501a and the second groove 502a are opposite, the first protrusion 503a cannot move when the rotating shaft 502 rotates, after the rotating shaft 502 is rotated to the position, the second protrusion 503b falls between the second groove 502a and the anti-disengagement portion 502c, and the angle of the second protrusion 503b is fixed; finally, the rotating shaft 502 is reversely rotated, the first protrusion 503a is rotated to the bending portion of the first groove 501a, because the elastic sheet 503 is concave to one side, the first protrusion 503a on the outer side edge of the elastic sheet 503 can be clamped in the first groove 501, the positioning is realized, and the first protrusion 503a and the second protrusion 503b of the elastic sheet 503 are respectively connected with the bevel gear 501 and the rotating shaft 502, so that the driving effect is ensured.

[0043] The above are preferred embodiments of the application, and are not intended to limit the protection scope of the application, therefore: any equivalent changes made on the structure, shape and principle of the application should be covered in the protection scope of the application.

Claims

1. A mirror driver for a car rearview mirror, characterized by: The invention comprises a bottom shell (1) and an upper cover (2), wherein a motor is arranged in the bottom shell (1), a worm (3) is arranged on the output end of the motor and is connected to a transmission gear (4) through the worm (3), and the other end of the transmission gear (4) is connected to a clutch gear (5), and the clutch gear (5) comprises a bevel gear (501), a rotating shaft (502) and a spring (503), wherein the bevel gear (501) is connected to the transmission gear (4), and the rotating shaft (502) is connected to a rack (6), the end of the rack (6) extends out of the upper cover (2) and is connected to a movable ring (7), the bevel gear (501) is passed through the rotating shaft (502) and is fixed by the spring (503), and the outer side and inner side of the spring (503) are fixed to the upper cover (2). A first convex portion (503a) and a second convex portion (503b) are respectively provided on the sides; a first groove (501a) is provided on the bevel gear (501); the first groove (501a) can be engaged with the first convex portion (503a); a second groove (502a) is provided on the rotating shaft (502); the second groove (502a) can be connected with the second convex portion (503b); the first groove (501a) and the second groove (502a) are both L-shaped grooves, and the bending directions of the first groove (501a) and the second groove (502a) are opposite; a guide portion (502b) is obliquely provided on the second groove (502a); the second convex portion (503b) can slide into the second groove (502a) through the guide portion (502b).

2. The automotive rearview mirror driver according to claim 1, characterized in that: The spring piece (503) is an annular piece made of elastic metal material. The spring piece (503) is concentrically arranged with the rotating shaft (502). One side of the spring piece (503) is concave and the concave side is arranged toward the helical gear (501). The first convex portion (503a) and the second convex portion (503b) are both multiple. The first groove (501a) and the second groove (502a) are both multiple and are evenly arranged along the circumference of the helical gear (501) and the rotating shaft (502).

3. The automotive rearview mirror driver according to claim 2, characterized in that: The first convex portion (503a) and the second convex portion (503b) are located at the same circumferential position.

4. The automotive rearview mirror driver according to claim 1, characterized in that: An annular limiting portion is provided on the inner side of the helical gear (501), one end of the rotating shaft (502) passes through the annular limiting portion and is connected to the spring plate (503), and the other end of the rotating shaft (502) is transmission-connected to the rack (6), the rack (6) is arc-shaped and is clamped in the bottom shell (1).

5. The automotive rearview mirror driver according to claim 1, characterized in that: A protruding anti-slip portion (502c) is provided at the bending portion of the second groove (502a), and a side surface of the anti-slip portion (502c) is connected to the guide portion (502b).

6. The automotive rearview mirror driver according to claim 1, characterized in that: A groove is provided in the middle of the upper cover (2), and a central support plate (201) is provided in the groove. The central support plate (201) is in the shape of a shuttle. A third groove (701) and a fourth groove (702) are provided on the inner side of the movable ring (7). The third groove (701) and the fourth groove (702) are both L-shaped, and the bending directions of the third groove (701) and the fourth groove (702) are opposite. The two ends of the central support plate (201) are respectively connected to the third groove (701) and the fourth groove (702).

7. The automotive rearview mirror driver according to claim 6, characterized in that: A plurality of fixed convex plates (101) are provided in the bottom shell (1), and grooves are provided on the fixed convex plates (101), and the grooves are connected to the motor, the transmission gear (4), the bevel gear (501), the rotating shaft (502), and the rack (6). The motor, the transmission gear (4), the bevel gear (501), the rotating shaft (502), and the rack (6) are all in two groups and are symmetrically arranged on the left and right sides of the bottom shell (1) with the central support plate (201) as the symmetry axis.

8. The automotive rearview mirror driver according to claim 6, characterized in that: The edge of the upper cover (2) is snap-fitted to the bottom shell (1) via a snap-fit, and a snap-fit ​​is provided in the middle of the central support plate (201) and is snap-fitted to the upper cover (2) via the snap-fit.

9. The automotive rearview mirror driver according to claim 1, characterized in that: The lower edge of the movable ring (7) is provided with a plurality of arc-shaped pieces (703) at intervals. The shape of the arc-shaped pieces (703) is the same as the shape of the lower portion of the bottom shell (1). A fifth groove (704) is provided in the upper portion of the movable ring (7). The fifth groove (704) is L-shaped. The end of the rack (6) is engaged with the fifth groove (704).

10. The automotive rearview mirror driver according to claim 7, characterized in that: The bottom shell (1) is a concave shell structure, the fixing convex plate (101) is provided on the upper side of the bottom shell (1), the PCB electric control board (102) and the spring plate (103) are provided on the lower side of the bottom shell (1), the bottom of the bottom shell (1) is clamped with the bottom cover (8), and a through hole is provided in the center of the bottom shell (1), the central support plate (201), the spring plate (103) and the bottom cover (8), a screw sleeve is passed through the through hole, and a fastening screw is provided in the screw sleeve.

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