Folding mechanism of electronic outside rear-view mirror

Abstract

The utility model discloses a folding mechanism of an electronic outside rear-view mirror, which comprises an upper shell and a lower shell which are assembled up and down, an accommodating space with an L-shaped structure is formed between the upper shell and the lower shell, a driving power is arranged in one side of the accommodating space, and a rotating shaft is arranged in the other side of the accommodating space; a worm is mounted at the driving power output end and is in power connection with a driven gear which is axially and vertically arranged, and the driven gear is arranged in the middle of the outer wall surface of the rotating shaft in a sleeving manner; the rotating shaft between the top surface of the driven gear and the inner top surface of the upper shell is sequentially sleeved with a top gasket, an elastic piece and a pressing ring from top to bottom, a clamping structure is arranged between the pressing ring and the rotating shaft in the circumferential direction, and another clamping structure is arranged between the pressing ring and the driven gear in the circumferential direction; driving power is directly connected with the driven gear through the worm, automatic folding or manual folding is switched through clamping between the pressing ring and the driven gear or not under the action of external force due to the arrangement of the elastic piece, the overall structure is compact, the size is small, assistance is achieved, and it is guaranteed that the thickness and the size of the outside rear-view mirror are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle rearview mirrors, in particular to a folding mechanism of an electronic exterior rearview mirror. Background Art

[0002] The car's exterior rearview mirrors are located on the left and right sides of the car's head. They can reflect the situation behind, to the sides and below the car, allowing the driver to indirectly see the situation in these locations. They act as a "second eye" to expand the driver's field of view.

[0003] The exterior rearview mirror is adjusted in angle and folded by a folding mechanism, and can also be folded manually when electric folding is realized. Usually, the elastic force of the compression spring causes the axial mechanisms to engage with each other, and the motor drives the rotating shaft to rotate through a two-stage or three-stage transmission. When external force is applied, the compression spring is compressed to disengage the engagement between the axial mechanisms, allowing manual folding.

[0004] In the prior art, the structure of the exterior rearview mirror is relatively complex and has many parts, which makes the overall volume of the exterior rearview mirror large, which is not conducive to controlling and reducing wind resistance during driving. Utility Model Content

[0005] In order to solve the above problems, the present application provides a folding mechanism for an electronic exterior rearview mirror with a reasonable structure, which effectively simplifies the composition of components while ensuring the function of the exterior rearview mirror. The overall structure is compact, which reduces the volume and helps to achieve and ensure that the thickness and volume of the exterior rearview mirror are reduced.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A folding mechanism for an electronic exterior rearview mirror comprises an upper shell and a lower shell which are assembled up and down, an L-shaped accommodating space is formed between the upper shell and the lower shell, a driving power is installed in one side of the accommodating space, and a rotating shaft is installed in the other side of the accommodating space; a worm is installed at the output end of the driving power, and the worm power is connected with an axially vertically arranged driven gear, and the driven gear is sleeved on the middle part of the outer wall surface of the rotating shaft; a top washer, a spring sheet, and a pressure ring are sequentially sleeved on the rotating shaft located between the top surface of the driven gear and the inner top surface of the upper shell from top to bottom, a clamping structure is circumferentially arranged between the pressure ring and the rotating shaft, and another set of clamping structures is circumferentially arranged between the pressure ring and the driven gear.

[0008] As a further improvement of the above technical solution:

[0009] The bottom end of the rotating shaft extends laterally to form a flange, and a sealing ring is pressed between the bottom surface of the flange and the lower shell; and an annular groove for the sealing ring to be mounted is provided on the lower shell.

[0010] A second washer, a roller bracket and a first washer are sequentially mounted on the rotating shaft between the flange and the driven gear from top to bottom. The roller bracket is a circular ring structure, and steel balls are embedded in the roller bracket at intervals along the circumferential direction.

[0011] The spring sheet is a wave spring with a thin elastic structure.

[0012] The upper portion of the inner wall of the pressure ring extends inward along the circumferential interval to form lateral protrusions, and the middle portion of the outer wall of the rotating shaft is provided with grooves along the circumferential intervals. The grooves and the lateral protrusions are matched to form a clamping structure between the pressure ring and the rotating shaft.

[0013] The bottom surface of the pressure ring extends downward along the circumferential interval to form a lower convex block, and the inner edge of the top surface of the driven gear is concave downward along the circumferential interval to form a concave structure. The lower convex block and the concave structure are assembled to form a clamping structure between the pressure ring and the driven gear.

[0014] The lower convex block and the lower concave structure are both trapezoidal structures with a larger upper portion and a smaller lower portion.

[0015] A plane is formed between adjacent concave structures on the driven gear.

[0016] The top surface of the top gasket extends upward along the circumferential direction to form a convex ring, and the inner top surface of the upper shell is provided with an annular groove which is sealed and matched with the convex ring.

[0017] A sealing cover is provided at the joint of the upper shell and the lower shell at the end of the worm.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] The utility model has a compact and reasonable structure. The driving power is directly connected to the driven gear via the worm. The setting of the spring piece switches the automatic or manual folding by whether the pressing ring and the driven gear are clamped or not under the action of external force. While ensuring the function of the exterior rearview mirror, the composition of the parts is effectively simplified. The overall structure is compact, which reduces the volume and helps to achieve and ensure the thickness and volume of the exterior rearview mirror are reduced, and effectively reduce the wind resistance during driving.

[0020] The utility model also has the following advantages:

[0021] A spring sheet is pressed between the top washer and the pressure ring, and the elastic force of the spring sheet is used to ensure the structural engagement in the axial direction. While ensuring the elastic force, the axial space is effectively saved, the axial structure is simplified, and the shape of the exterior rearview mirror is facilitated;

[0022] The driving power contained and installed between the upper shell and the lower shell is connected to the driven gear through the worm power. The driving power drives the rotating shaft to rotate through the clamping engagement between the driven gear and the pressure ring, thereby realizing automatic folding. The layout is ingenious and reasonable, which effectively reduces the thickness of the exterior rearview mirror and achieves size reduction, especially helping to reduce wind resistance during driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is the appearance structure diagram of the utility model.

[0024] Figure 2 It is a cross-sectional view of the utility model along the fitting surface of the upper shell and the lower shell.

[0025] Figure 3 It is a cross-sectional view of the utility model along the axial direction of the rotating shaft.

[0026] Figure 4 It is an exploded view of the utility model.

[0027] Figure 5 It is a schematic diagram of the assembly of the driven gear and the pressure ring of the utility model.

[0028] Among them: 1. rotating shaft; 2. washer 1; 3. roller bracket; 4. washer 2; 5. driven gear; 6. pressure ring; 7. spring; 8. top washer; 9. upper shell; 10. driving power; 11. lower shell; 12. worm; 13. cover;

[0029] 101, groove; 102, flange;

[0030] 31. Steel balls;

[0031] 51. Concave structure; 52. Plane;

[0032] 61. Lateral protrusion; 62. Lower protrusion. DETAILED DESCRIPTION

[0033] The specific implementation of the present utility model is described below in conjunction with the accompanying drawings.

[0034] like Figure 1 and Figure 2As shown, a folding mechanism of an electronic exterior rearview mirror of the present embodiment comprises an upper shell 9 and a lower shell 11 which are assembled up and down, and an L-shaped accommodating space is formed between the upper shell 9 and the lower shell 11, a driving power 10 is installed in one side of the accommodating space, and a rotating shaft 1 is installed in the other side of the accommodating space; a worm 12 is installed at the output end of the driving power 10, and the worm 12 is connected with an axially vertically arranged driven gear 5, and the driven gear 5 is sleeved on the middle part of the outer wall surface of the rotating shaft 1; a top washer 8, a spring piece 7, and a pressure ring 6 are sequentially sleeved on the rotating shaft 1 located between the top surface of the driven gear 5 and the inner top surface of the upper shell 9 from top to bottom, a clamping structure is circumferentially arranged between the pressure ring 6 and the rotating shaft 1, and another set of clamping structures is circumferentially arranged between the pressure ring 6 and the driven gear 5.

[0035] In this embodiment, the driving power 10 is directly connected to the driven gear 5 via the worm 12. Due to the setting of the spring piece 7, the automatic or manual folding is switched by whether the pressure ring 6 and the driven gear 5 are clamped or not under the action of external force. While ensuring the function of the exterior rearview mirror, the composition of components is effectively simplified, the overall structure is compact, and the volume is reduced.

[0036] In this embodiment, a spring sheet 7 is pressed between the top gasket 8 and the pressure ring 6, and the elastic force of the spring sheet 7 is used to ensure the axial structural engagement. While ensuring the elastic force, the axial space is effectively saved, the axial structure is simplified, and the shape of the exterior rearview mirror is facilitated.

[0037] In this embodiment, the driving power 10 contained and installed between the upper shell 9 and the lower shell 11 is connected to the driven gear 5 via the worm 12. The driven gear 5 is engaged with the pressure ring 6, and the driving power 10 drives the rotating shaft 1 to rotate, thereby realizing automatic folding. The layout is ingenious and reasonable, which effectively reduces the thickness of the exterior rearview mirror and realizes size reduction, especially helping to reduce wind resistance during driving.

[0038] like Figure 3 and Figure 4 As shown, the bottom end of the rotating shaft 1 extends laterally to form a flange 102, and a sealing ring is pressed between the bottom surface of the flange 102 and the lower shell 11; the lower shell 11 is provided with an annular groove for the sealing ring to be mounted, which effectively ensures the sealed installation at the joint between the rotating shaft 1 and the lower shell 11.

[0039] The rotating shaft 1 located between the flange 102 and the driven gear 5 is provided with a washer 2 4, a roller bracket 3, and a washer 1 2 in sequence from top to bottom. The roller bracket 3 is a circular ring structure, and steel balls 31 are embedded in the roller bracket 3 at intervals along the circumferential direction. The installation of the roller bracket 3 and the steel balls 31 effectively ensures the relative rotation between the rotating shaft 1 and the driven gear 5 during manual folding.

[0040] The spring 7 is a wave spring with a thin elastic structure.

[0041] In this embodiment, the spring piece 7 can use a standardized wave spring, which can effectively reduce and control the cost while ensuring the elastic force and realizing the function; through the selection of the wave spring, the size of the exterior rearview mirror in the axial direction of the rotating shaft 1 can be effectively reduced.

[0042] like Figure 5 As shown, the upper portion of the inner wall surface of the pressure ring 6 extends inward along the circumferential interval to form a lateral protrusion 61, and the middle portion of the outer wall surface of the rotating shaft 1 is provided with a groove 101 along the circumferential interval. The groove 101 and the lateral protrusion 61 are matched to form a clamping structure between the pressure ring 6 and the rotating shaft 1; through the clamping structure, the synchronous rotation between the pressure ring 6 and the rotating shaft 1 is achieved.

[0043] The bottom surface of the pressure ring 6 extends downward along the circumferential interval to form a lower protrusion 62, and the inner edge of the top surface of the driven gear 5 is concave downward along the circumferential interval to form a concave structure 51. The lower protrusion 62 is assembled with the concave structure 51 to form a clamping structure between the pressure ring 6 and the driven gear 5; through the clamping structure, when the lower protrusion 62 is engaged and assembled in the concave structure 51 by the action of elastic force, the pressure ring 6 and the rotating shaft 1 can be driven to rotate through the driving power 10 through the worm 12 and the driven gear 5 to realize automatic folding; and when the elastic force is overcome by the action of external force and the lower protrusion 62 is separated from the concave structure 51, the power transmission from the driving power 10 and the driven gear 5 to the rotating shaft 1 is cut off, which is convenient for manual folding.

[0044] The lower protrusion 62 and the lower concave structure 51 are both trapezoidal structures with a larger upper portion and a smaller lower portion, so as to facilitate the lower protrusion 62 to be attached to or detached from the lower concave structure 51 .

[0045] A plane 52 is formed between adjacent concave structures 51 on the driven gear 5. In the manual folding state, the lower protrusion 62 of the pressing ring 6 slides relatively to the upper side of the driven gear 5 via the concave structure 51 of the trapezoidal structure, and the bottom end of the lower protrusion 62 abuts against the plane 52.

[0046] The top surface of the top gasket 8 extends upward along the circumferential direction to form a convex ring, and the inner top surface of the upper shell 9 is provided with an annular groove that is sealed with the convex ring. Combined with the elastic force of the spring sheet 7, the sealing fit between the top gasket 8 and the upper shell 9 is realized.

[0047] A cover 13 is provided at the junction of the upper shell 9 and the lower shell 11 at the end of the worm 12 to facilitate maintenance of the internal structure.

[0048] In this embodiment, the driving power 10 is a motor, and the output end of the motor is matched with a reducer.

[0049] The usage of the utility model is:

[0050] Under the elastic force of the spring piece 7, the lower protrusion 62 at the bottom end of the pressure ring 6 is clamped and engaged with the concave structure 51 of the driven gear 5, the driving power 10 works, the worm 12 rotates, and the driven gear 5 is driven to rotate through the tooth meshing. The clamping of the lower protrusion 62 and the concave structure 51, and the clamping of the lateral protrusion 61 and the groove 101 drive the pressure ring 6 and the rotating shaft 1 to rotate, thereby realizing automatic folding.

[0051] The elastic force of the spring sheet 7 is overcome by external force, and the lower protrusion 62 of the pressing ring 6 slides relatively and disengages from the concave structure 51, and the bottom surface of the lower protrusion 62 abuts against the plane 52 of the driven gear 5, thereby releasing the clamping between the pressing ring 6 and the driven gear 5, and folding is performed when manual force is applied, thereby realizing manual folding.

[0052] The utility model has an ingenious structure. While ensuring the functions of the exterior rearview mirror, it effectively simplifies the composition of parts and components. The overall structure is compact, which reduces the volume, helps to achieve and ensure that the thickness of the exterior rearview mirror is thinned and the volume is reduced, and effectively reduces the wind resistance during driving.

[0053] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0054] The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the protection scope of the utility model.

Claims

1. A folding mechanism for an electronic exterior rearview mirror, characterized in that: The invention comprises an upper shell (9) and a lower shell (11) which are assembled up and down, and an L-shaped accommodating space is formed between the upper shell (9) and the lower shell (11), a driving power (10) is installed in one side of the accommodating space, and a rotating shaft (1) is installed in the other side of the accommodating space; a worm (12) is installed at the output end of the driving power (10), and the worm (12) is connected with a driven gear (5) arranged axially and vertically, and the driven gear (5) is sleeved on the middle part of the outer wall surface of the rotating shaft (1); a top washer (8), a spring sheet (7), and a pressure ring (6) are sleeved on the rotating shaft (1) located between the top surface of the driven gear (5) and the inner top surface of the upper shell (9) in sequence from top to bottom, a clamping structure is arranged between the pressure ring (6) and the rotating shaft (1) along the circumferential direction, and another set of clamping structures is arranged between the pressure ring (6) and the driven gear (5) along the circumferential direction.

2. The folding mechanism of an electronic exterior rearview mirror according to claim 1, characterized in that: The bottom end of the rotating shaft (1) extends laterally to form a flange (102), and a sealing ring is pressed between the bottom surface of the flange (102) and the lower shell (11); and an annular groove for mounting the sealing ring is provided on the lower shell (11).

3. The folding mechanism of an electronic exterior rearview mirror according to claim 2, characterized in that: A second washer (4), a roller bracket (3), and a first washer (2) are sequentially mounted on a rotating shaft (1) between a flange (102) and a driven gear (5) from top to bottom. The roller bracket (3) is a circular ring structure, and steel balls (31) are embedded and penetrated through the roller bracket (3) at intervals along the circumferential direction.

4. The folding mechanism of an electronic exterior rearview mirror according to claim 1, characterized in that: The spring sheet (7) is a wave spring with a thin elastic structure.

5. The folding mechanism of an electronic exterior rearview mirror according to claim 1, characterized in that: The upper portion of the inner wall surface of the pressure ring (6) extends inward along the circumferential interval to form a lateral protrusion (61), and the middle portion of the outer wall surface of the rotating shaft (1) is provided with a groove (101) along the circumferential interval. The groove (101) and the lateral protrusion (61) are matched to form a clamping structure between the pressure ring (6) and the rotating shaft (1).

6. The folding mechanism of an electronic exterior rearview mirror according to claim 1, characterized in that: The bottom surface of the pressure ring (6) extends downward along the circumferential interval to form a lower protrusion (62), and the inner edge of the top surface of the driven gear (5) is concave downward along the circumferential interval to form a concave structure (51). The lower protrusion (62) and the concave structure (51) are assembled to form a clamping structure between the pressure ring (6) and the driven gear (5).

7. The folding mechanism of an electronic exterior rearview mirror according to claim 6, characterized in that: The lower convex block (62) and the lower concave structure (51) are both trapezoidal structures with a larger upper portion and a smaller lower portion.

8. The folding mechanism of an electronic exterior rearview mirror according to claim 6, characterized in that: A plane (52) is formed between adjacent concave structures (51) on the driven gear (5).

9. The folding mechanism of an electronic exterior rearview mirror according to claim 1, characterized in that: The top surface of the top gasket (8) extends upward along the circumferential direction to form a convex ring, and the inner top surface of the upper shell (9) is provided with an annular groove which is sealed with the convex ring.

10. The folding mechanism of an electronic exterior rearview mirror according to claim 1, characterized in that: A sealing cover (13) is provided at the joint of the upper shell (9) and the lower shell (11) at the end of the worm (12).

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