KR102135950B1 - Slim folding apparatus of rear mirror for vehicle - Google Patents

Abstract

The present invention relates to a slim folding device for a vehicle side-view mirror. A tension spring is attached to an end of a drive shaft of a drive motor to prevent noise generated by a clearance between the drive motor and a housing during operation of the drive motor. In addition, the present invention provides a folding device which is slimmer than a conventional folding device to use a cylindrical wave spring.

Description

Slim folding device for vehicle side mirrors{SLIM FOLDING APPARATUS OF REAR MIRROR FOR VEHICLE}

The present invention relates to a folding device for a side mirror for a vehicle, and more particularly, to a slim type folding device that removes sound generated during operation of a driving motor and miniaturizes parts.

Generally, a side mirror is essentially installed in a vehicle to secure a driver's watch. The angle of the side mirror can be adjusted within a certain range. Recently, for the convenience of the driver, the spread of an electric side mirror that can adjust the angle of the side mirror in the car by adjusting a switch installed around the driver's seat has become popular. Is spreading.

Recently, a side mirror with a camera has appeared instead of the side mirror. When the camera is mounted, the overall size of the side mirror is miniaturized, so the folding device also needs to be miniaturized.

As a technique for an electric folding device for a side mirror for a vehicle, Korean Patent Publication No. 10-2012-0052808 has been proposed.

However, in the case of such a prior art, the folding device is thick and has a large volume, which is not suitable for use in a side mirror equipped with a camera.

In addition, the driving motor has a problem in that a'click' sound occurs when the driving shaft and the end cap of the motor collide during rotation. In addition, there is a gap between the driving motor and the housing, so noise may occur during operation.

(01) Republic of Korea Patent Publication No. 10-2012-0052808, the electric folding structure of the outside mirror, Publication date: 2012.05.24 (02) Republic of Korea Patent No. 10-1943603, Electric folding device for vehicle side mirrors, Registration date:2019.01.23

An object of the present invention is to provide a slim folding device for a side mirror for a vehicle that can prevent noise generated by a gap between a motor and a housing during operation of a driving motor.

In addition, an object of the present invention is to provide a slim type folding device that can be used in a side mirror in which a camera is used.

Slim folding device for a vehicle side mirror according to an embodiment of the present invention includes a housing; A driving motor provided inside the housing and having a driving worm mounted on a driving shaft; A first worm gear meshed with the driving worm is formed in the center of the outer circumferential surface of the first shaft, first spur gears are formed on both sides of the first shaft portion, and both ends of the first shaft are formed in a first U-shaped support portion formed in the housing. A first reduction gear supported by; A second spur gear that is installed in parallel with the first reduction gear and meshes with the first spur gear is formed on both sides of the outer circumferential surface of the second shaft, a driven worm is formed in the center of the second shaft, and both ends of the second shaft are A second reduction gear supported by a second U-shaped support formed in the housing; A clutch gear in which a second worm gear meshing with the driven worm is formed on an outer circumferential surface; A shaft coupled to the clutch gear to rotate a side mirror; Intermittent means including a cylindrical wave spring to be fitted to the shaft, to prevent damage to the gear when forced folding of the side mirror; And a tension spring attached to an end of the driving shaft to press the driving shaft, wherein the housing is formed with a tension spring accommodating portion for accommodating the tension spring and supporting the tension spring.

In an embodiment of the present invention, the tension spring is characterized in that the metal plate is bent so that one side is opened.

In an embodiment of the present invention, the tension spring is a support plate of a flat shape in contact with the inner surface of the tension spring receiving portion; An arch portion extending from one end of one side of the support plate to form an arch; A connecting plate extending to an end of the arch portion to form a level with the support plate and connected to the drive shaft; And it characterized in that it comprises a tension providing portion extending from the connection plate in the direction of the support plate is spaced apart from the support plate.

In an embodiment of the present invention, the edge portion of the support plate is chambered to form a locking portion with a narrow width to the arch portion, and the tension spring receiving portion is provided with an insertion groove into which the locking portion is inserted. .

In an embodiment of the present invention, the end of the tension providing portion is bent to form a V-shape to prevent damage when colliding with the support plate.

In the embodiment of the present invention, the cylindrical wave spring is 6 windings, and each wave is characterized in that 3.5 times.

In an embodiment of the present invention, the drive motor has a rectangular parallelepiped shape, a long surface is disposed parallel to the upper and lower surfaces of the housing, and the first reduction gear, the second reduction gear, and the shaft are sequentially overlapped with the driving motor. It is characterized by being arranged.

According to the present invention, noise generated during operation of the driving motor can be prevented.

In addition, according to the present invention, a slim type folding device can be provided, and thus can be applied to a side mirror in which a camera is used.

1 is an exploded housing of a slim type folding device for a vehicle side mirror according to an embodiment of the present invention,
2 is an exploded perspective view of the shaft portion of FIG. 1,
3 is a front view showing a state in which the upper housing is removed,
4 shows a portion of the upper housing and tension spring.

The present invention can be applied to various changes and can have various embodiments, and specific embodiments will be illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. In the description of the present invention, when it is determined that a detailed description of known technologies related to the present invention may obscure the subject matter of the present invention, the detailed description will be omitted.

Terms such as first, second, A, and B may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from other components. For example, the first component may be referred to as a second component without departing from the scope of the present invention, and similarly, the second component may be referred to as a first component. The term and/or includes a combination of a plurality of related described items or any one of a plurality of related described items.

The terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, terms such as “include” or “have” are intended to indicate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, and that one or more other features are present. It should be understood that the existence or addition possibilities of fields or numbers, steps, operations, components, parts or combinations thereof are not excluded in advance.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exploded housing of a slim type folding device of a side mirror for a vehicle according to an embodiment of the present invention, FIG. 2 is a perspective view of an exploded shaft portion of FIG. 1, and FIG. 3 is a front view of an upper housing removed 4, the upper housing and the tension spring.

A slim folding device for a side mirror for a vehicle according to an embodiment of the present invention includes a drive motor 200 and a shaft 600 for rotating the side mirror in the housing 100, and the driving force of the drive motor 200 is a shaft. It includes a first reduction gear 300, a second reduction gear 400, and a clutch gear 500 for transmission. In addition, an intermittent means 700 including a cylindrical wave spring is coupled to the shaft 400, and a tension spring 800 is coupled to the drive motor.

Looking more specifically, the housing 100 may be composed of a lower housing 110 and an upper housing 120, the lower housing 110 and the upper housing 120 may be coupled by screwing.

The lower housing 110 is formed with U-shaped support parts 111 and 112 on which the first and second reduction gears 300 and 400 can be mounted. A tension spring accommodating part 121 is formed in the upper housing 120 to accommodate the tension spring 800 and prevent the tension spring from being pushed back.

The driving motor 200 is disposed in the same direction as the housing 100 in order to reduce the volume as much as possible. That is, both the housing and the driving motor are elongated in a rectangular shape, and the driving motor 100 is disposed in the same direction as the housing, so that the long surface of the driving motor is arranged parallel to the upper and lower surfaces of the housing. A PCB substrate 250 may be mounted on one side of the driving motor 200. The folding device can be slim by attaching the PCB substrate 250 to the long side of the driving motor.

A drive shaft protrudes from the shopping drive motor 200, and a drive worm 210 is formed on the drive shaft. An end cap 220 is formed on the opposite side of the driving worm 210. When the drive shaft rotates, a sound “crackling” may be generated while colliding with the end cap 220. The tension spring 800 may be added to solve this problem. The detailed configuration of the tension spring 800 will be described later.

In the first reduction gear 300, a first worm gear 310 engaged with the driving worm 210 is formed at the center of the outer circumferential surface of the first shaft 320, and the first worm gear 310 is first on both sides of the first shaft 320. Spur gear 330 is formed. And both ends of the first shaft is supported by hanging on the first U-shaped support 111 formed in the lower housing 110. At this time, the first reduction gear 300 is made of a metal tube of a cylindrical shape of the first shaft 320, insert injection molding synthetic resin on the outer circumferential surface of the first shaft 320, the first worm gear 310 and the One spur gear 330 is integrally formed. Of course, the first reduction gear 300 may injection mold the synthetic resin to integrally form the first worm gear 310 and the first spur gear 330 on the first shaft 320.

When the second reduction gear 400 is installed in parallel with the first reduction gear 300, the second spur gear 430 meshed with the first spur gear 330 is on both sides of the outer circumferential surface of the second shaft 420. It is formed on, and the driven worm 410 is formed in the center of the second shaft 420. And both ends of the second shaft is supported by the second U-shaped support portion 112 formed on the lower housing 110.

In the clutch gear 500, a second worm gear 510 meshing with the driven worm 410 is formed on an outer peripheral surface.

At this time, the second reduction gear 400 is integrally formed with a driven worm 410 on the central outer circumferential surface of the second shaft 420 of the circularly driven shape, and the second spur gear on both sides of the second shaft 420. 430 are combined. The second spur gear 430 is formed with keys at both ends of the second shaft 420 so as to prevent turning when coupled to the second shaft 420, so that the support holes of the second spur gear 430 are formed. (Not shown) to be fitted.

According to the above structure, the driving worm 210, which is the driving gear, meshes with the first worm gear 310 of the first reduction gear 300 to invert the power transmission direction of the driving motor 200 at a right angle to decelerate the rotational speed. do. Subsequently, the second reduction gear 400 is further decelerated by interlocking the first spur gear 330 of the first reduction gear 300 and the second spur gear 430 of the second reduction gear 400. ) Of the driven worm 410 and the second worm gear 510 formed on the outer circumferential surface of the clutch gear 500 converts the power transmission direction to a right angle and further reduces the rotational speed to rotate the clutch gear. .

The shaft 600 is coupled to the clutch gear 500 and rotated, and rotates the side mirror by rotation of the shaft.

An anti-wear disk (not shown) is inserted between the shaft 600 and the clutch gear 500 to prevent the shaft from being worn due to friction.

The coupling portion of the upper shaft 600 and the clutch gear 500 is capable of being engaged in the form of a tooth, and the clutch gear is preferably manufactured by an insert injection method.

In addition, an intermittent means 700 for intermittent power of the driving motor 200 may be coupled to the inner circumferential surface of the magnetic clutch gear 500.

The intermittent means 700 is inserted into the inner circumferential surface of the clutch gear, the clutch gear insert 710 to enhance the strength of the clutch gear, a cylindrical wave spring 720 fitted to one end of the shaft 600, the cylindrical wave The outer circumferential surface of one end of the shaft to prevent the disk-shaped first and second disks 730 and 740 provided at both ends of the spring 720 from being disengaged from the first and second disks and the cylindrical wave spring 720 It is made of a fixing piece 750 fastened to the fixing groove 610 formed in. In addition, a bush (not shown) made of rubber that is inserted into an end portion of the shaft 600 and supports between the housing and the fixing plate may be further included.

At this time, the first disk 730 is in close contact with one end of the cylindrical wave spring 720 and the fixed piece 750, and the second disk 740_ is the other end of the cylindrical wave spring 720. It is in close contact with the clutch gear 500.

The intermittent means 700 can prevent the gear from being damaged when the side mirror is forcibly folded.

In the past, a compression spring was used, but in the case of the compression spring, the height was high, which was unsuitable for a slim type folding device. When using a cylindrical wave spring as in this embodiment, it is possible to reduce the height compared to the conventional spring.

Since the cylindrical wave spring 720 has a wave shape, a space is formed between the next turns in a certain area. By forming the space, it is possible to provide stronger elasticity and provide the same elasticity as the conventional one even with a small length.

The cylindrical wave spring 720 has a thickness of 0.61 mm and a cross-sectional area of about 1.952 mm ² . The total number of windings of the cylindrical wave spring 720 is 6 windings, and the number of waves per winding is 3.5. With the above configuration, when no load is applied to the cylindrical wave spring 720, that is, the height of the cylindrical wave spring 720 in the free-field state is 13.60 mm. When mounted on the vehicle in this state, a deflection of about 3.6mm occurs, and the height is about 10.0mm. In this state, if you manually operate the side mirror, a deflection of about 4.8 mm occurs and the height is about 8.8 mm. And when it is bent back, a deflection of about 6mm occurs and the height becomes about 7.6mm.

In some cases, the electric folding device of a vehicle also needs to be manually operated or bent, so the load applied in each situation and the elasticity of the wave spring are required. If the thickness of the wave spring, the cross-sectional area, the number of windings, and the number of waves per winding are the same as in the present embodiment, the electric folding device may operate normally without damage even if a manual operation or a bending condition occurs.

Next, look at the tension spring 800.

A tension spring 800 is attached to the end of the drive shaft. The tension spring 800 can prevent the sound generated by the rotation of the driving motor by pressing the driving motor. When the drive motor 200 is operated, the drive shaft moves back and forth and hits the end cap 220 of the motor, and a “click” sound is generated. As the tension spring 800 presses the drive shaft, the drive shaft is in close contact with the end cap 220 to produce a sound. It can be prevented from occurring. In addition, it is possible to prevent the sound generated by the gap between the drive motor 200 and the housing.

In addition, the tension spring receiving portion 121 is formed in the upper housing 120 to prevent and fix the tension spring 800 from being pushed back.

The tension spring accommodating part 121 is for accommodating the tension spring 800 and is opened in the direction of the tension spring 800. Specifically, the tension spring receiving portion 121 is formed with a support wall 122 in close contact with the support plate 810 of the tension spring, and side walls 123 are formed on both sides of the support wall 122. . In addition, an insertion groove 124 is formed between the support wall 122 and the side wall. A locking portion 812 to be described later is inserted into the insertion groove 124.

The tension spring 800 is a metal plate having an elastic force, and is curved in an approximately'c' shape, and one side is opened.

In detail, the tension spring 800 extends from one end of one side of the support plate 810 of the flat shape and the support plate 810 of the flat spring contacting the inner surface of the tension spring receiving portion 121 to form an arch. The arch portion 820, which extends to the end of the arch portion to form a level with the support plate and is connected to the drive shaft 830, and is formed extending in the direction of the support plate from the connection plate to the support plate and It is composed of a space provided tension section 840.

The arch portion 820 provides elasticity when the connecting plate 530 is pushed back during the driving motor operation, and the tension providing portion 840 prevents the connecting plate from being pushed above a certain level. That is, when only the separation distance between the tension providing unit 840 and the support plate 810 is pushed and the tension providing unit 840 touches the support plate 810, the tension spring is no longer pushed and is driven by the elastic force of the arch portion ( The driving motor 200 is pressed while providing tension to the 200).

In order to prevent the tension providing unit 840 from being damaged when colliding with the support plate 810, the end of the tension providing unit is bent to form a V shape. That is, after extending from the connecting plate in the direction of the support plate, when it reaches a certain distance, it is bent again in the opposite direction to form a'V' shape.

The shopping mall support plate 810 has a narrow width at a portion connected to the arch portion 820. That is, the edge portion of the support plate is chambered to narrow the width to the arch portion 820, and the arch portion 820 is formed to extend to the narrowed width. The width of the connection plate 830 and the tension providing unit 840 extending from the arch portion 820 may be formed to be the same as the width of the arch portion 820.

As described above, since the width of the support plate is wide, the locking portion 812 is formed.

The tension spring accommodating part 121 is formed with an insertion groove 122 into which the locking part 812 is fitted. Therefore, the locking portion 812 is fitted into the insertion groove 124 so that the tension spring 800 can be fixed without shaking within the receiving portion.

Hereinafter, an operation example of the slim folding chapter of the side mirror for a vehicle according to the present invention will be described with reference to FIGS. 1 to 4.

For the convenience of the driver, the side mirror can be opened or closed in the car by adjusting the switch installed around the driver's seat.

For example, when the driving motor 200 rotates forward and the driving worm 210 rotates in one direction, the first worm gear 310 engaged with the driving worm 210 rotates, and the power transmission direction is changed to a right angle and the rotation speed decelerates. do. Subsequently, the rotational speed is further decelerated by the interlocking action of the first reduction gear 300 and the second reduction gear 400, and the second worm gear formed on the outer circumferential surfaces of the driven worm 410 and the clutch gear 500 of the second reduction gear. The power transmission direction is switched to a right angle by the gear coupling of 510, the rotational speed is further reduced, and the clutch gear 500 rotates and the side mirror is unfolded.

Conversely, when the driving motor rotates in the opposite direction and the driving worm 210 rotates in another “‡”, the side mirrors are folded.

At this time, as the rotation shaft of the drive motor rotates, the drive motor moves back and forth. When the driving shaft and the end cap 220 collide with this movement, an unwanted sound is generated. As in the present embodiment, when a tension spring 800 is added to the end of the rotating shaft to press the driving shaft, a certain force is applied to the driving shaft. It is possible to prevent the sound generated while colliding with the end cap 220. Similarly, the noise generated by the housing and the clearance does not occur.

In the housing, the tension spring in which the tension spring 800 is accommodated is integrally formed with the accommodation part 121, so that the tension spring 800 can be supported. In addition, the tension spring 800 is formed with a locking portion 812 that is inserted into the insertion groove 124 of the tension spring receiving portion to prevent the tension spring 800 from shaking.

The embodiments have been mainly described above, but this is merely an example, and is not intended to limit the present invention. Those of ordinary skill in the art to which the present invention pertains are not exemplified above, without departing from the essential characteristics of the present embodiment. It will be appreciated that various modifications and applications are possible. For example, each component specifically shown in the embodiments can be implemented by modification. And differences related to these modifications and applications should be construed as being included in the scope of the invention defined in the appended claims.

100: housing 200: drive motor
210: driving worm 300: first reduction gear
310: first worm gear 320: first axis
330: first spur gear 400: second reduction gear
410: Follower 420: 2nd axis
430: second spur gear 500: clutch gear
510: second worm gear 600: shaft
700: intermittent means 800: tension spring

Claims (4)

housing;
A driving motor provided inside the housing and having a driving worm mounted on a driving shaft;
A first worm gear meshed with the driving worm is formed in the center of the outer circumferential surface of the first shaft, first spur gears are formed on both sides of the first shaft portion, and both ends of the first shaft are formed in a first U-shaped support portion formed in the housing. A first reduction gear supported by;
A second spur gear that is installed in parallel with the first reduction gear and meshes with the first spur gear is formed on both sides of the outer circumferential surface of the second shaft, and a driven worm is formed in the center of the second shaft, and both ends of the second shaft are A second reduction gear supported by a second U-shaped support formed in the housing;
A clutch gear in which a second worm gear meshing with the driven worm is formed on an outer circumferential surface;
A shaft coupled to the clutch gear to rotate a side mirror;
Intermittent means including a cylindrical wave spring to be fitted of the shaft, to prevent damage to the gear when the folding of the side mirror; And
It is attached to the end of the drive shaft and includes a tension spring for pressing the drive shaft,
The housing is formed with a tension spring accommodating portion for accommodating the tension spring and supporting the tension spring,
The tension spring is a slim folding device for a vehicle side mirror, characterized in that the metal plate is bent so that one side is open, and the end of one side of the metal plate is bent in a V shape. According to claim 1,
The tension spring includes a flat shape support plate contacting the inner surface of the tension spring receiving portion;
A connection plate extending from the support plate to form a level with the support plate and connected to the drive shaft; And
Slim-type folding device for a side mirror for a vehicle, characterized in that it comprises a tension providing part extending from the connection plate in the direction of the support plate and spaced apart from the support plate. According to claim 2,
The corner portion of the support plate is chambered to form a locking portion with a narrow width,
A slim folding device for a side mirror for a vehicle, characterized in that an insertion groove into which the engaging portion is inserted is formed in the tension spring receiving portion.


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