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KR-20260065258-A - Actuator for Head-up Display

KR20260065258AKR 20260065258 AKR20260065258 AKR 20260065258AKR-20260065258-A

Abstract

An actuator for a head-up display is disclosed. According to one embodiment of the present disclosure, an actuator for a head-up display is provided, comprising: a link portion configured to be coupled to one end of an aspherical mirror; a driving force transmission portion including a lead screw for moving the link portion; a driving portion that rotates the lead screw in the direction of the rotation axis of the motor according to the driving of the motor; a lead screw bracket coupled to the driving portion and supporting the driving portion; a vibration damping portion disposed between the driving portion and the lead screw bracket to absorb vibration of the motor; and a balance plate disposed adjacent to the lower end of the motor and damping vibration of the motor, wherein the driving portion includes a rotor shaft extending along the rotation axis of the motor, and the balance plate is coupled to the rotor shaft.

Inventors

  • 김병기

Assignees

  • 현대모비스 주식회사

Dates

Publication Date
20260508
Application Date
20241101

Claims (10)

  1. A link portion configured to be coupled with one end of an aspherical mirror; A driving force transmission unit including a lead screw that moves the above link portion; A driving unit that rotates the lead screw in the direction of the motor's rotation axis according to the driving of the motor; A lead screw bracket coupled to the above-mentioned drive unit and supporting the above-mentioned drive unit; A vibration damping unit disposed between the driving unit and the lead screw bracket to absorb vibrations of the motor; and It includes a balance plate disposed adjacent to the lower part of the motor and damping the vibration of the motor, The above driving unit is, It includes a rotor shaft that extends along the rotation axis of the motor, and The above balance plate is, An actuator for a head-up display that combines with the rotor shaft above.
  2. In Article 1, The above rotor shaft is, An actuator for a head-up display, extending from the lower part of the motor toward the balance plate so that the lower part of the motor and the balance plate face each other at a constant distance.
  3. In Article 2, The above balance plate is, An actuator for a head-up display, wherein the rotation axis of the balance plate is formed in the same axial direction as the rotation axis of the motor and is coupled with the rotor shaft.
  4. In Paragraph 3, The above balance plate is, An actuator for a head-up display, further comprising a first hole or a second hole formed at a preset position along the circumference of the balance plate.
  5. In Paragraph 4, The above-mentioned first hole is, An actuator for a head-up display that forms a plurality of first holes arranged at regular intervals along the circumference of the balance plate.
  6. In Article 5, The above balance plate is, An actuator for a head-up display, further comprising a weight inserted into at least one of the plurality of first holes to dampen vibration according to the vibration of the motor.
  7. In Paragraph 4, The above balance plate is, An actuator for a head-up display, wherein the size and/or arrangement of the second hole is adjustable according to the vibration of the motor.
  8. In Paragraph 3, The above balance plate is, An actuator for a head-up display, wherein the rotation axis of the balance plate is formed at an eccentric position relative to the rotation axis of the motor and coupled with the rotor shaft.
  9. In Article 6, The above weight is, An actuator for a head-up display, wherein the weight is made of metal.
  10. In Article 1, The above vibration damping unit is, A through hole formed through one area at both ends of a motor bracket configured to surround the motor; A damper that is fitted into the lead screw bracket to absorb vibrations of the motor and includes a damper hole corresponding to the through hole; A shoulder screw penetrating the through hole, the damper hole, and the lead screw bracket; and A nut coupled to the above shoulder screw An actuator for a head-up display including

Description

Actuator for Head-up Display The present disclosure relates to an actuator for a head-up display, and more specifically, to a vibration damping device that dampens motor vibration using a balance plate. The content described in this section merely provides background information regarding the present disclosure and does not constitute prior art. A head-up display is a device that displays images, including vehicle speed, fuel level, and navigation information, on the windshield. A head-up display is generally configured to project display information from a picture generator unit onto the windshield. A head-up display according to the prior art rotates an aspheric mirror using a motor. Here, the aspheric mirror receives rotational force by making point contact with a power transmission unit that transmits the motor's rotational force. When the aspheric mirror makes point contact with the power transmission unit, external forces caused by motor vibration and friction are concentrated at a single point, which can lead to wear and geometric transformation of the aspheric mirror. Head-up displays according to the prior art have a problem in that they fail to dampen motor vibrations when the motor operates at high RPM, resulting in noise. Additionally, backlash occurs between the link and the lead screw that move horizontally based on the motor's rotational force. Backlash occurring between the link and the lead screw degrades the operation and reliability of the head-up display drive module. In other words, errors occur during power transmission of the head-up display drive module, and there are problems such as vibration and noise caused by external impacts. FIG. 1 is a perspective view showing an actuator for a head-up display according to one embodiment of the present disclosure. FIG. 2 is an exploded perspective view showing an actuator for a head-up display according to one embodiment of the present disclosure. FIG. 3 is a front view showing a first embodiment of a balance plate according to one embodiment of the present disclosure. FIG. 4 is a perspective view showing an actuator for a head-up display including a weight added to one embodiment of FIG. 3. FIG. 5 is a front view showing a second embodiment of a balance plate according to one embodiment. FIG. 6 is a front view showing a third embodiment of a balance plate according to one embodiment. Some embodiments of the present disclosure are described in detail below with reference to the exemplary drawings. It should be noted that in assigning reference numerals to the components of each drawing, the same components are given the same reference numeral whenever possible, even if they are shown in different drawings. Furthermore, in describing the present disclosure, if it is determined that a detailed description of related known components or functions could obscure the essence of the present disclosure, such detailed description is omitted. In describing the components of the embodiments according to the present disclosure, symbols such as first, second, i), ii), a), b), etc., may be used. These symbols are intended only to distinguish the components from other components, and the essence, order, or sequence of the components is not limited by the symbols. When a part in the specification is described as 'comprising' or 'having' a component, this means that, unless explicitly stated otherwise, it does not exclude other components but may include additional components. In describing the components of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are used merely to distinguish the components from other components, and the essence, order, or sequence of the components is not limited by the terms. Where it is stated that one component is 'connected', 'combined', or 'joined' to another component, it should be understood that while the component may be directly connected or joined to the other component, another component may also be 'connected', 'combined', or 'joined' between each component. Terms such as 'part', 'module', etc., as described in the specification refer to a unit that processes at least one function or operation, and this may be implemented in hardware, software, or a combination of hardware and software. Unless otherwise stated, it should be noted that the description of any one embodiment may also apply to other embodiments. The description of the invention disclosed below, together with the accompanying drawings, is intended to describe exemplary embodiments of the invention and is not intended to represent the only embodiment in which the invention may be practiced. FIG. 1 is a perspective view showing an actuator for a head-up display according to one embodiment of the present disclosure. FIG. 2 is an exploded perspective view showing an actuator for a head-up display according to one embodiment of the present disclosure. Referring to FIGS. 1 and 2, an actuator (100) for a head-up di