KR20210080113A - Actuator module and head-up display apparatus for vehicle comprising the same - Google Patents

Abstract

According to an embodiment of the present invention, a driving module of a head-up display device for a vehicle includes: an aspherical mirror having a bracket mount in some sections; a driving unit which adjusts a rotation angle of the aspherical mirror according to forward and backward motions of a linear shaft, and has a joint member at the end of the linear shaft; a joint bracket disposed between the bracket mount and the joint member; and an elastic unit which is horizontally connected between the driving unit and the aspherical mirror to provide elastic force. Therefore, by making a pitch of the linear axis dense, the resolution of tilting can be precise.

Description

Driving module and vehicle head-up display device including the same {ACTUATOR MODULE AND HEAD-UP DISPLAY APPARATUS FOR VEHICLE COMPRISING THE SAME}

The present invention relates to a head-up display device for a vehicle.

Recently, products supporting driver's safety and convenience have been released, and one of them, a head-up display (HUD) for a vehicle, is attracting attention as a diverse product group.

In general, a head-up display for a vehicle is a device that displays an image containing vehicle speed, fuel remaining, road guidance information, etc. on a windshield or combiner, which is a front window of a vehicle.

Among the components of the vehicle head-up display, the aspherical mirror rotates in point contact with a part of the driven force transmission unit. In this case, external force due to vibration, acceleration, friction, etc. is concentrated at one point, and wear and shape deformation may occur.

Such wear or deformation of the aspherical mirror causes a decrease in the precision of the driving module, and furthermore, is directly related to the deterioration of the optical performance of the system, and thus it may be difficult to secure rigidity during the impact test.

In addition, rotational driving of the aspherical mirror requires a high-resolution rotation angle. However, the conventional driving module has limitations because it depends on the pitch of the lead screw and the resolution of the stepper motor.

The present invention has been proposed in view of the above circumstances, and an object of the present invention is to provide a driving module capable of reducing the load of the driving unit by using an elastic force and further preventing the internal play of the spherical joint connected to the aspherical mirror.

In addition, it is an object to uniformly contact the driving unit and the aspherical mirror so that the spherical mount of the aspherical mirror can maintain a fixing force even in an external impact.

The problem to be solved by the present invention is not limited to the problems mentioned above, and other problems not mentioned here will be clearly understood by those skilled in the art from the following description.

The driving module of the head-up display device for a vehicle according to an embodiment of the present invention includes: an aspherical mirror having a bracket mount in a partial section; a driving unit which adjusts the rotation angle of the aspherical mirror according to the forward and backward motions of the linear shaft and has a joint member at an end of the linear shaft; a joint bracket disposed between the bracket mount and the joint member; and an elastic part horizontally connected between the driving part and the aspherical mirror to provide an elastic force.

The elastic part has an elastic force corresponding to the rotational driving force of the aspherical mirror.

The elastic part is formed to be detachable from the aspherical mirror while being fixed to the driving part.

The elastic part moves linearly while being spaced apart from the linear axis.

The driving unit includes a ring-shaped fixing piece, the aspherical mirror includes a 'C'-shaped fastening piece, and the elastic part is connected between the fixing piece and the fastening piece.

The driving unit may include: a joint member having a spherical joint connected to an end of the linear shaft and a stopper protruding from a side surface of the spherical joint; and a position detecting member disposed on the periphery of the linear axis and capable of contacting the stopper of the joint member.

The position detecting member includes a casing and a switch protruding from the casing and contacting the stopper on a horizontal plane.

The driving unit adjusts the rotation angle of the aspherical mirror according to whether the stopper and the switch are in contact with each other.

The driving unit is fixedly coupled to both ends of the front center lower end of the aspherical mirror, respectively.

The bracket mount is formed at the lower center of the rear side of the aspherical mirror, and the joint bracket is fixedly coupled to the bracket mount.

The joint bracket is configured to be detachable from the bracket mount.

A driving module for a head-up display device for a vehicle according to another embodiment of the present invention includes a driving unit for adjusting a rotation angle of an aspherical mirror, and an elastic unit horizontally connected between the driving unit and the aspherical mirror to provide an elastic force.

In this case, it is preferable that the driving unit is disposed at the front and rear of the aspherical mirror, respectively, and makes point contact with the aspherical mirror in a section that does not overlap with each other.

The driving unit includes a driving motor having a linear shaft and a spherical joint connected to an end of the linear shaft.

The aspherical mirror includes a joint bracket connected to the spherical joint.

The spherical joint is preferably a spherical joint.

The driving unit is fixedly coupled to both ends of the front side of the aspherical mirror and the rear central lower end of the aspherical mirror, respectively, and interlocks with each other.

On the other hand, the head-up display device for a vehicle according to an embodiment of the present invention, the lower case; a driving module for adjusting the rotation angle of the aspherical mirror rotatably connected to the lower case; and a screen having a leaf spring connected to the lower case and limiting the displacement of the spherical mount to a predetermined fixing force.

The driving module includes: a driving unit that adjusts the rotation angle of the aspherical mirror according to the forward and backward motions of the linear shaft, and has a joint member at an end of the linear shaft; and an elastic part horizontally connected between the driving part and the aspherical mirror to provide an elastic force.

The driving unit may include: a joint member having a spherical joint connected to an end of the linear shaft and a stopper protruding from a side surface of the spherical joint; and a position detecting member disposed around the linear shaft and having a switch in contact with a stopper of the joint member.

The driving unit adjusts the rotation angle of the aspherical mirror according to whether the stopper and the switch are in contact with each other.

The lower case has a vertical fastening groove having a relatively higher height than the diameter of the spherical mount, and the vertical fastening groove is bolted to the screen.

The leaf spring protrudes in a direction in contact with the spherical mount by a difference between a height of the vertical fastening groove and a diameter of the spherical mount to fix the spherical mount.

The present invention can remove the backlash of the lead screw and the internal play of the spherical joint at once by applying the elastic force of the tension spring directly to the aspherical mirror.

In particular, according to the present invention, the resolution of tilting can be precise by making the pitch of the linear axis dense.

In addition, the present invention can easily convert the linear motion of the driving unit having the linear axis into the rotational motion of the aspherical mirror by using the spherical joint.

In addition, the present invention can reduce the error factor of the contact portion related to driving through the elastic part made of a single spring, and reduce the load on the driving part.

In addition, the present invention limits the displacement of the aspherical mirror by the amount of overlap of the leaf spring as long as an external shock to the extent of breaking the bolting connection is not applied, thereby effectively fixing the fixed portion of the aspherical mirror without play.

1 is a view schematically showing a driving module of a head-up display device for a vehicle according to an embodiment of the present invention.
2 is a view showing a fastening relationship between components in a driving module of a head-up display device for a vehicle according to an embodiment of the present invention.
3 is a view illustrating a driving unit in a driving module of a head-up display device for a vehicle according to an embodiment of the present invention;
4 and 5 are views illustrating an operation relationship between components in a driving module of a head-up display device for a vehicle according to an embodiment of the present invention.
6 is a view illustrating a position at which a driving unit is installed in a driving module of a head-up display device for a vehicle according to an embodiment of the present invention;
7 and 8 are views illustrating a mounting state between an aspherical mirror and a lower case in the head-up display device for a vehicle according to an embodiment of the present invention.
9 and 10 are views illustrating a state in which a plate spring is mounted on a screen in the head-up display device for a vehicle according to an embodiment of the present invention.
11 is a view illustrating a state in which a screen equipped with a leaf spring and a lower case are coupled to each other with an aspherical mirror interposed therebetween in the head-up display device for a vehicle according to an embodiment of the present invention;

Advantages and features of the present invention, and a method for achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, and only these embodiments make the disclosure of the present invention complete, and those of ordinary skill in the art to which the present invention pertains. It is provided to fully inform the person of the scope of the invention, and the present invention is defined by the description of the claims. Meanwhile, the terms used in this specification are for the purpose of describing the embodiments and are not intended to limit the present invention. As used herein, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, “comprises” or “comprising” refers to the presence or absence of one or more other components, steps, operations and/or elements other than the stated elements, steps, acts and/or elements. addition is not excluded.

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

Driving module of head-up display device

1 is a diagram schematically showing a driving module of a head-up display device for a vehicle according to an embodiment of the present invention, FIG. 2 is a diagram showing a fastening relationship between components, and FIG. 3 is a diagram showing a driving unit.

1 to 3 , the driving module of the head-up display for a vehicle includes an aspherical mirror 110 , a joint bracket 120 , a driving unit 130 , and an elastic unit 170 .

The aspherical mirror 110 has spherical mounts 111 at both ends.

At this time, the spherical mount 111 located on the right side of the aspherical mirror 110 is installed at the reference position, and the spherical mount 111 located on the left side of the aspherical mirror 110 is installed at the auxiliary position.

As shown in FIG. 1 , the aspherical mirror 110 rotates in the axial direction with the spherical mounts 111 at both ends serving as a reference.

The spherical mount 111 located on the right side of the aspherical mirror 110 is in contact with the Cone Vee portion located on the 'me'. Here, the position of the spherical mount 111 in contact with the 'I' is a reference.

The spherical mount 111 located on the left side of the aspherical mirror 110 is in contact with the Vee portion located at 'A'. Here, the spherical mount 111 in contact with the 'A' is an auxiliary position section.

The illustrated part 'C' is a part corresponding to the flat, and the tilt-adjusting driving unit 130 is positioned to rotate the aspherical mirror 110 in the direction of the rotation axis.

That is, the aspherical mirror 110 has a 'Cone-Vee-Flat' structure to prevent the external force from being concentrated on one point. This is because they are uniformly contacted for each section.

If the force is tilted to only one point through point contact, the shape of the aspherical mirror 110 is highly likely to be deformed or to be worn. This results in a decrease in driving precision and is directly related to a decrease in the optical performance of the system.

Therefore, it is preferable that the aspherical mirror 110 has a 'Cone-Vee-Flat' structure and is uniformly in contact with the contact portion.

The bracket mount 112 is formed at the central lower end of the aspherical mirror 110 . The bracket mount 112 has hollow fastening pins 112a and 112b formed to protrude rearward.

A fastening piece 113 is formed around the bracket mount 112 . The fastening piece 113 is formed in a 'C' shape with one open surface.

Here, the fastening piece 113 is fitted with an elastic part 170 . Therefore, it is preferable that the open surface of the fastening piece 113 is formed toward the front.

This is because, since the elastic force of the elastic part 170 is generated rearward, it is important that the elastic part 170 is not easily detached from the fastening piece 113 .

The joint bracket 120 is fastened to the bracket mount 112 . The joint bracket 120 is assembled in the same way as the fastening pins 112a and 112b of the bracket mount 112 and bolting.

The driving unit 130 includes a driving motor 131 , a linear shaft 132 , a housing 133 , a joint member 134 , a position detecting member 135 , and a fixing piece 136 .

The drive motor 131 has a linear shaft 132 .

The housing 133 surrounds and protects the driving motor 131 .

The joint member 134 includes a spherical joint 134a and a stopper 134b.

The spherical joint 134a is inserted into the end of the linear shaft 132 and is inserted and fixed to the joint bracket 120 .

The stopper 134b is formed to protrude from the side of the spherical joint 134a.

The position detecting member 135 is located on the side of the driving motor 131 . The position detecting member 135 includes a casing 135a and a switch 135b.

The casing 135a is a body in which an electrical element is embedded. The casing 135a is detachable from the side surface of the driving motor 131 .

The switch 135b is formed to protrude from the casing 135a. The switch 135b has a structure in which a pressing operation is possible, and the position of the aspherical mirror 110 can be detected according to the pressing operation.

If the switch 135b is pressed, the aspherical mirror 110 is in the parking position (about 18 degrees), and when the switch 135b is protruded, the aspherical mirror 110 is directed to or directed to the initial position. Able to know.

In this case, the switch 135b may be electrically connected to the casing 135a, and the casing 135a may be connected to the driving motor 131 to perform the above-described series of operations.

Here, the switch 135b is positioned on a horizontal line with the stopper 134b of the joint member 134 . Accordingly, the stopper 134b moves in association with the linear shaft 132 that moves forward and backward by the operation of the driving motor 131 .

Accordingly, when the stopper 134b comes into contact with the switch 135b, the current position of the aspherical mirror 110 can be detected.

Meanwhile, the initialization mechanism of the driving unit 130 according to the present invention may be implemented in a stall current sensing method in addition to the method in which the switch 135b and the stopper 134b are switched.

The fixing piece 136 is formed in a shape having a hollow in the upper portion of the driving unit 130 . One end of the elastic part 170 is connected between the holes formed in the center of the fixing piece 136 . And the other end of the elastic part 170 is connected to the fastening piece (113).

Accordingly, the elastic part 170 is horizontally fixed. In this case, the elastic part 170 preferably has an elastic force corresponding to the rotational driving force of the aspherical mirror 110 . Accordingly, the elastic part 170 may reduce the load of the driving motor 131 .

4 and 5 are diagrams illustrating an operation relationship between components in a driving module of a head-up display device for a vehicle according to an embodiment of the present invention, and FIG. 6 is a diagram illustrating a position in which a driving unit is installed.

4 shows an initial position (0 degrees) of the aspherical mirror 110, and FIG. 5 shows a parking position (eg, -18 degrees, +/- is a direction) of the aspherical mirror 110. As shown in FIG.

The elastic part 170 has a structure capable of offsetting screw backlash of the driving part 130 which is a linear actuator and an internal play of the spherical joint 134a.

As shown in FIGS. 4 and 5 , the driving unit 130 is located at the lower center of the rear surface of the aspherical mirror 110 .

On the other hand, as shown in FIG. 6 , the driving unit 130 may be located at the front left and right lower sides of the aspherical mirror 110 , respectively. In this case, the installation position of the driving unit 130 may be changed according to the internal space of the head-up display device for a vehicle.

Operational relationship of the drive module

The driving motor 131 of the driving unit 130 is a step motor, and converts the rotational motion of the motor into a linear motion by a lead screw (linear shaft) 132 .

The initialization operation relationship is largely developed in the order of confirming the final operation state of the actuator (driver) 130 ( S100 ), recognizing the origin ( S200 ), the initialization position ( S300 ), and the transfer operation ( S400 ).

Next, in the origin recognition (S200) step, the driving unit 130 moves to 0 mm to contact the stopper 134b. This is a stall function, and the drive motor 131 is stopped when the stopper is contacted. After the drive motor 131 is stopped, the position value is checked and set to the origin.

Next, in the Initial Position step ( S300 ), the driving unit 130 moves to 6 mm to complete the initialization.

Finally, the transfer operation S400 performs forward and backward according to a command.

The driving method of the driving unit 130 can be viewed in the following two types.

A method of confirming the initial position of the aspherical mirror 110 through the switch 135b, or a method of confirming the initial position of the aspherical mirror 110 through motor stall current sensing.

First, the order of the method of checking the initial position through the switch 135b is 'controller operation → motor rotational movement according to the driving signal → linear motion driving of the driving unit 130 → driving of the aspherical mirror through the spherical joint → initial position with the switch It goes through the process of 'Sensing → Rotating the aspherical mirror to a fixed position'.

Next, the order of checking the initial position through motor stall current detection is 'controller operation → motor rotational movement according to the drive signal → initial position of the aspherical mirror through motor stall current detection → determined Rotate the aspherical mirror to position.

Head-up display device (screen + aspherical mirror + lower case mounting structure)

7 and 8 are views illustrating a mounting state between an aspherical mirror and a lower case in the head-up display device for a vehicle according to an embodiment of the present invention.

7 and 8 , the head-up display device for a vehicle includes a lower case 140 , a driving module (a driving unit; 130 , an elastic unit; 170 ), and a screen 150 .

Spherical mounts 111 are formed at both ends of the aspherical mirror 110 to be rotatably connected to the lower case 140 .

The lower case 140 forms a V block in a portion corresponding to the spherical mount 111 . In this case, the aspherical mirror 110 is constrained to the x, y, and z axes and the β and γ rotation directions. That is, only the α rotation direction is allowed for the aspherical mirror 110 .

The driving module includes a driving unit 130 and an elastic unit 170 . At this time, since the above-described configurations are the same as those of the above-described driving module, the overlapping description will be omitted.

9 and 10 are views illustrating a state in which a plate spring is mounted on a screen in a head-up display device for a vehicle according to an embodiment of the present invention.

9 and 10 in parallel, the screen 150 is connected to the lower case (140 in FIG. 7).

At this time, the screen 150 is provided with a leaf spring 152 to limit the displacement of the spherical mount (111 in FIGS. 6 and 7) of the aspherical mirror (110 in FIGS. 6 and 7).

The leaf spring 152 has a fastening hole 151 provided in the screen 150 and a detachable snap-fit fastening structure.

The leaf spring 152 includes a pressing part 152a and a hook part 152b.

The pressing portion 152a protrudes downward by a predetermined interval from the fastening hole 151, and is a portion in direct contact with the spherical mount (111 in FIGS. 6 and 7).

The hook portion 152b is snap-fit fastened to the fastening hole 151 so that the leaf spring 152 is firmly fixed to the fastening hole 151 .

11 is a view illustrating a state in which a screen equipped with a leaf spring and a lower case are coupled to each other with an aspherical mirror interposed therebetween in the head-up display device for a vehicle according to an embodiment of the present invention.

Referring to FIG. 11 , the leaf spring 152 of the screen 150 limits the displacement of the spherical mount 111 of the aspherical mirror 110 to a predetermined fixing force.

At this time, the lower case 140 is provided with a vertical fastening groove 141 having a relatively higher height (L2) than the diameter (D) of the spherical mount (111).

The vertical fastening groove 141 is bolted to the screen 150 .

Here, the leaf spring 152 protrudes in a direction in contact with the spherical mount 111 by the difference between the height L2 of the vertical fastening groove 141 and the diameter D of the spherical mount 111 .

That is, the leaf spring 152 fixes the spherical mount 111 with a force F corresponding to the protruding length L1.

In other words, when the screen 150 assembled with the leaf spring 152 is bolted (B) coupled to the lower case 140, the driving mount of the aspherical mirror 110 is not applied unless an amount of impact sufficient to break the bolting coupling is applied. Reference numeral 161 moves only by the protruding length L1 of the leaf spring 152 .

Here, a force F corresponding to the overlapping amount of the leaf spring 152 as much as the protruding length L1 acts as a fixing force of the aspherical mirror 110 .

As described above, in the present invention, the backlash of the lead screw and the internal play of the spherical joint can be removed at once by applying the elastic force of the tension spring directly to the aspherical mirror.

In particular, according to the present invention, the resolution of tilting can be precise by making the pitch of the linear axis dense.

And, the present invention can easily convert the linear motion of the driving unit having a linear axis into the rotational motion of the aspherical mirror by using the spherical joint.

In addition, the present invention can reduce the error factor of the contact portion related to driving through the elastic part made of a single spring, and reduce the load on the driving part.

In addition, the present invention limits the displacement of the aspherical mirror by the amount of overlap of the leaf spring as long as an external shock to the extent of breaking the bolting connection is not applied, thereby effectively fixing the fixed portion of the aspherical mirror without play.

The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical spirit of the present invention.

110: aspherical mirror 111: spherical mount
112: bracket mount 113: fastening piece
120: joint bracket 130: drive unit
131: drive motor 132: linear axis
133: housing 134: joint member
134a: spherical joint 134b: stopper
135: position detecting member 135a: casing
135b: switch 136: batten
140: lower case 141: vertical fastening groove
150: screen 151: fastener
152: leaf spring 152a: press
152b: hook 160: folding mirror
170: elastic part

Claims (19)

Aspheric mirror having a bracket mount in some sections;
a driving unit that adjusts the rotation angle of the aspherical mirror according to the forward and backward motions of the linear shaft and has a joint member at an end of the linear shaft;
a joint bracket disposed between the bracket mount and the joint member; and
A driving module for a head-up display device for a vehicle comprising an elastic part horizontally connected between the driving part and the aspherical mirror to provide an elastic force.
According to claim 1,
the elastic part
The driving module of the head-up display device for a vehicle having an elastic force corresponding to the rotational driving force of the aspherical mirror.
According to claim 1,
The elastic part
A driving module of a head-up display device for a vehicle that is formed in a form detachable from the aspherical mirror while being fixed to the driving unit.
According to claim 1,
The elastic part
A driving module of a head-up display device for a vehicle that linearly moves while being spaced apart from the linear axis.
According to claim 1,
The driving unit includes a ring-shaped fixing piece, and the aspherical mirror includes a 'C'-shaped fastening piece,
The driving module of the head-up display device for a vehicle in which the elastic part is connected between the fixing piece and the fastening piece.
According to claim 1,
the driving unit
a joint member having a spherical joint connected to an end of the linear shaft and a stopper protruding from a side surface of the spherical joint; and
The driving module of the head-up display device for a vehicle that is disposed on the periphery of the linear shaft, and includes a position detecting member that is in contact with the stopper of the joint member.
7. The method of claim 6,
The position detection member is
casing and
It is formed to protrude from the casing and includes a switch in contact with the stopper on a horizontal plane,
the driving unit
A driving module for a head-up display device for a vehicle that adjusts the rotation angle of the aspherical mirror according to whether the stopper and the switch are in mutual contact.
According to claim 1,
the driving unit
A driving module of a head-up display device for a vehicle that is fixedly coupled to both ends of the front central lower end of the aspherical mirror.
According to claim 1,
The bracket mount is
It is formed in the lower center of the rear side of the aspherical mirror,
The joint bracket is
A driving module of a head-up display device for a vehicle that is fixedly coupled to the bracket mount.
According to claim 1,
The joint bracket is
The driving module of the head-up display device for a vehicle that is made of a structure detachable to the bracket mount.
A driving unit for adjusting the rotation angle of the aspherical mirror;
and an elastic part horizontally connected between the driving part and the aspherical mirror to provide an elastic force,
The driving unit is disposed at the front and rear of the aspherical mirror, respectively, and the driving module of the head-up display device for a vehicle is in point contact with the aspherical mirror in a non-overlapping section.
12. The method of claim 11,
the driving unit
a drive motor having a linear axis;
a spherical joint connected to an end of the linear shaft;
The driving module of the head-up display device for a vehicle, wherein the aspherical mirror includes a joint bracket connected to the spherical joint.
12. The method of claim 11,
the driving unit
A driving module for a head-up display device for a vehicle that is fixedly coupled to both ends of the front side of the aspherical mirror and a lower center of the rear side of the aspherical mirror, respectively, and is interlocked.
lower case;
a driving module for adjusting the rotation angle of the aspherical mirror rotatably connected to the lower case and adjusting the rotation angle of the aspherical mirror according to the forward and backward motions of the linear shaft; and
Doedoe connected to the lower case, the head-up display device for a vehicle comprising a screen having a leaf spring for limiting the displacement of the spherical mount to a predetermined fixing force.
15. The method of claim 14,
The driving module is
a driving unit having a joint member at an end of the linear shaft;
The head-up display device for a vehicle comprising an elastic part horizontally connected between the driving part and the aspherical mirror to provide an elastic force.
16. The method of claim 15,
the driving unit
a joint member having a spherical joint connected to an end of the linear shaft and a stopper protruding from a side surface of the spherical joint; and
A head-up display device for a vehicle that is disposed around the linear shaft, and includes a position detecting member having a switch in contact with a stopper of the joint member.
17. The method of claim 16,
the driving unit
A head-up display device for a vehicle that adjusts the rotation angle of the aspherical mirror according to whether the stopper and the switch are in mutual contact.
15. The method of claim 14,
The lower case is
and a vertical fastening groove having a height relatively higher than the diameter of the spherical mount, wherein the vertical fastening groove is bolted to the screen.
19. The method of claim 18,
The leaf spring is
A head-up display device for a vehicle that protrudes in a direction in contact with the spherical mount by a difference between the height of the vertical fastening groove and the diameter of the spherical mount to fix the spherical mount.

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