JP5494516B2 - Manufacturing method of head-up display - Google Patents

Description

  The present invention displays a display image on a windshield of a vehicle, a holding plate that supports a concave mirror is driven at a reduced speed by an actuator having a reduction gear mechanism, and an inclination angle of the holding plate with respect to a housing is controlled by rotation of the actuator. The present invention relates to a method for manufacturing a head-up display.

  Conventionally, a display position adjustment device for a head-up display described in Patent Document 1 is known. This patent document 1 has proposed the structure which does not use a limit switch in order to stop a concave mirror in a rotation limit position.

  Therefore, in Patent Document 1, an idle lock portion that idles or locks the drive gear when the rotation limit position is reached is formed in one of the drive gear and the driven gear. The idling lock portion is configured as a stopper portion of the partial gear.

JP-A-7-96771

  According to the technique disclosed in Patent Document 1, there is a concern about the generation of abnormal noise due to a collision with the stopper portion. Therefore, in the development process of the present invention, a structure has been devised in which the holding plate for holding the concave mirror is directly rotated by using an actuator having a reduction gear mechanism incorporated in the actuator housing.

  In this structure, in the reduction gear mechanism inside the actuator housing, a stopper portion is formed on a part of the teeth to suppress the generation of abnormal noise. In this development process product, backlash occurs in the reduction gear mechanism incorporated in the actuator housing.

  The output shaft of the reduction gear mechanism, that is, the rectangular reduction output shaft of the actuator that directly drives the holding plate that holds the concave mirror is fitted in the rectangular shaft hole of the rotation shaft of the holding plate, and the reduction output shaft This is a structure in which the rotation axis of the holding plate is rotated by rotation.

  And, since there is a clearance between the tip of the deceleration output shaft and the shaft hole of the rotation shaft of the holding plate, so-called loose fitting coupling structure, with respect to the rotation of the deceleration output shaft, The rotation of the rotation axis of the holding plate does not completely coincide, and the rotation angle of the rotation axis of the holding plate varies.

  Due to the backlash of these reduction gear mechanisms and the variation in the rotation angle associated with loose fitting of the rotation shaft of the holding plate, the holding plate collides with the casing constituting the frame of the head-up display and damages the parts. There is concern.

  In order to prevent this, the head-up display in which the holding plate does not collide with the housing due to the backlash of the reduction gear mechanism and the variation in the rotation angle due to the loose coupling of the rotating shaft of the holding plate. A manufacturing method is required.

  The present invention has been made paying attention to such problems existing in the prior art, and its purpose is to provide a concave mirror of a head-up display and a holding plate for holding the concave mirror by using a reduction gear mechanism. Even if the tilt angle of the concave mirror fluctuates due to the backlash of the reduction gear mechanism, the tilt angle of the holding plate that holds the concave mirror is set correctly even in a state where it cannot move due to backlash any more. It is possible to provide a method for manufacturing a head-up display in which the holding plate and the concave mirror do not collide with the casing of the head-up display at least due to backlash.

  Descriptions of patent documents listed as prior art can be introduced or incorporated by reference as explanations of technical elements described in this specification.

  In order to achieve the above object, the present invention employs the following technical means. That is, according to the first aspect of the present invention, the holding plate that holds the concave mirror in the case is driven to reduce the speed by using the motor and the reduction gear mechanism that are held in the actuator housing in the case. A head-up display manufacturing method that adjusts an inclination angle with respect to a motor, wherein a reduction output shaft of a reduction gear mechanism is connected to a holding plate so that the holding plate rotates as the reduction output shaft rotates, and an actuator housing is rotated. Applying a rotational force to set the inclination angle of the holding plate with respect to the housing while maintaining the state where the stopper portion of the driven gear made of the first gear in the reduction gear mechanism is in contact Yes.

  According to the present invention, the rotational force for rotating the actuator housing is applied, and the inclination angle of the holding plate with respect to the housing is set while maintaining the state where the driving gear is in contact with the stopper portion. The tilt angle is set without the gears coming into contact, and after the tilt angle of the holding plate is set, the holding plate moves due to backlash, and the holding plate is further tilted to prevent the holding plate and the concave mirror from colliding with the housing. can do.

  In the invention according to claim 2, in order to set an inclination angle with respect to the housing of the holding plate while maintaining the state in which the drive gear is in contact with the stopper portion, while applying a rotational force for rotating the actuator housing, After the inclination angle of the holding plate is adjusted, the actuator housing is fixed with screws so as not to rotate with respect to the housing.

  According to this invention, since the actuator housing is tightened and fixed so that the actuator housing does not rotate with respect to the housing after adjusting the inclination angle of the holding plate while applying the rotational force to the actuator housing, the screw is tightened. After being fixed, the holding plate does not collide with the housing.

  In the invention according to claim 3, the screw is fixed by pressing the actuator housing temporarily tightened against the casing against the casing in the axial direction of the deceleration output shaft with a jig, and between the actuator housing and the housing. The present invention is characterized in that the screw is finally tightened after the actuator housing is held with respect to the casing by the frictional force.

  According to the present invention, the actuator housing is pressed against the housing with a jig and the actuator housing is held against the housing by the frictional force between the actuator housing and the housing, and then the screw is finally tightened. Since the movement of the actuator housing at the time can be restricted, the collision between the holding plate and the housing can be reliably prevented.

  According to the fourth aspect of the invention, when the rotational force is applied to the actuator housing while setting the inclination angle of the holding plate with respect to the casing, the deceleration output shaft is fixed to the casing and the actuator housing is fixed. By rotating, the drive gear is rotated with respect to the stopper portion, and the drive gear is brought into contact with the stopper portion.

  According to this invention, when the actuator housing is fixed and the drive gear is rotated, the inclination angle of the holding portion plate with respect to the housing changes. Conversely, when the holding plate is fixed to the housing and the actuator housing is rotated, the deceleration output shaft is stopped with respect to the housing, and the stopper is also stopped with respect to the housing. . For this reason, when the actuator housing rotates with respect to the housing, the motor in the actuator housing also rotates, and the drive gear can be brought into contact with the stopper portion, and the inclination angle of the holding plate is adjusted in this contacted state. Since the backlash between the drive gear and the stopper portion after the inclination angle is set, the stopper portion and thus the holding plate do not move, so that the holding plate or the concave mirror is prevented from coming into contact with the housing and being damaged. be able to.

  In the invention according to claim 5, when the reduction output shaft of the reduction gear mechanism is connected to the holding plate so that the holding plate rotates as the reduction output shaft rotates, the reduction output shaft is inserted into the hole of the holding plate. And the planar portion of the deceleration output shaft is opposed to the planar portion of the hole of the holding plate through the clearance in the rotational direction of the deceleration output shaft.

  According to the present invention, since the flat portion of the deceleration output shaft is opposed to the flat portion of the hole of the holding plate via the clearance, there is a variation based on the clearance in the rotational position of the holding plate with respect to the rotational position of the deceleration output shaft. This variation is overlapped with the variation due to the backlash of the reduction gear mechanism, resulting in a large variation in the tilt position of the holding plate as a whole, but the drive gear is in contact with the stopper by rotating the actuator housing By setting the inclination angle of the holding plate with respect to the housing while maintaining the above, the holding plate can be set to the correct inclination angle in a state in which these variations are eliminated. Therefore, it is possible to prevent the holding plate and the casing from moving in the direction of collision due to these variations after manufacturing.

  According to the sixth aspect of the present invention, when setting the inclination angle of the holding plate with respect to the housing while rotating the actuator housing and maintaining the state where the driving gear is in contact with the stopper portion, the inclined surface of the jig An inclination angle of the holding plate with respect to the housing is set by bringing the holding plate into contact with the housing.

  According to this invention, the inclination angle of the holding plate with respect to the housing can be accurately set by bringing the holding plate into contact with the inclined surface of the jig.

It is a schematic block diagram of the head-up display in 1st Embodiment of this invention. It is a perspective view of the concave mirror part of the head-up display which decomposed | disassembled and displayed each part in the said embodiment. It is a perspective view of the concave mirror part of the head-up display which assembled | attached each part in the said embodiment. 2 shows a state in which the concave mirror portion shown in FIG. 2 and FIG. 3 is incorporated in the actual head-up display housing, and shows the state seen from the direction of arrow Z4 in FIG. It is an internal block diagram. It is an actuator internal block diagram which shows the state of the reduction gear mechanism in the actuator used for the said embodiment. It is a top view which shows the state of the tooth | gear of the stopper gear which consists of a partial gear which meshes with the drive gear directly connected with the output shaft of the motor among the reduction gear mechanisms of FIG. It is a schematic diagram which shows the structure of the gear train of the reduction gear mechanism of FIG. It is a schematic diagram which shows the attachment state of the holding plate and the actuator which hold | maintained the concave mirror in the said embodiment. It is a schematic diagram which shows the state which applied the rotational force to the actuator housing from the state shown in FIG. 8, and eliminated the backlash. FIG. 9 is a schematic view showing a state in which the inclination angle of the holding plate is set from the state shown in FIG. 9, a thrust force is applied to the actuator housing with a jig to fix the actuator housing with a frictional force, and then the screw is finally tightened. FIG. It is an external view of the actuator used for 2nd Embodiment of this invention, (a) part of FIG. 11 is a front view of an actuator, (b) part of FIG. 11 is a right view of an actuator.

  A plurality of modes for carrying out the present invention will be described below with reference to the drawings. In each embodiment, parts corresponding to the matters described in the preceding embodiment may be denoted by the same reference numerals, and redundant description may be omitted. When only a part of the configuration is described in each mode, the other modes described above can be applied to the other parts of the configuration.

  Not only combinations of parts that clearly indicate that the combination is possible in each embodiment, but also the embodiments are partially combined even if they are not clearly specified unless there is a problem with the combination. It is also possible.

(First embodiment)
Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. First, it demonstrates using FIG. 1 which shows the schematic block diagram of the head-up display in one Embodiment of this invention.

  In FIG. 1, the head-up display device according to the present embodiment is mounted on a vehicle such as an automobile, and includes a housing 1, a display unit 2, a backlight unit 3, a reflecting member 4, and a concave mirror 5. It has.

  Further, the display light L generated through the display unit 2 and the backlight unit 3 and reflected through the first reflecting member 4 and the concave mirror 5 is projected onto the windshield 6 of the vehicle for display. Examples of display contents include various vehicle information and navigation information.

  The housing 1 is made of synthetic resin, for example, and the display unit 2, the backlight unit 3, the first reflecting member 4, and the concave mirror 5 are housed inside, and the display light L is applied to the side facing the windshield 6. An emission part 7 for emitting light toward the windshield 6 is formed, and the emission part 7 is covered with a translucent cover 8.

  The display unit 2 receives the light from the backlight unit 3 and forms display light L. The backlight unit 3 includes a light source composed of a light emitting diode, a plurality of light sources arranged on the substrate at intervals, a lens member that receives light from the light source and emits the light toward the display unit 2, a light source and a lens. A light source case for housing the member.

  The reflecting member 4 is made of, for example, a plane mirror, and reflects the display light L from the display unit 2 to the concave mirror 5. The concave mirror 5 reflects the display light L reflected through the reflecting member 4 toward the emitting portion 7.

  The display light L reflected in this way is transmitted through the translucent cover 8 provided in the emitting portion 7 and is irradiated onto the windshield 6. As a result, the vehicle occupant P can visually recognize the virtual image superimposed on the landscape.

  FIG. 2 is a perspective view of the concave mirror portion of the head-up display device in which each part is disassembled and displayed. In FIG. 2, the concave mirror 5 includes a concave mirror main body 51 made of a mirror and a synthetic resin holding plate 50 that supports the concave mirror main body 51, and is rotatable about a rotation shaft 10 formed on the holding plate 50. is there.

  This rotation angle is about 2 degrees in both clockwise and counterclockwise directions. By this rotation, the position of the point where the display light L is applied to the windshield 6 can be changed according to the height of the occupant's eyes, that is, the height, and the height at which the virtual image is generated can be arbitrarily adjusted. This adjustment can be arbitrarily adjusted by the occupant's intention by operating an operation switch (not shown).

  This adjustment is performed by rotating the deceleration output shaft 16a of the actuator 16 attached to the left first shaft portion 10a of the rotating shaft 10. A reduction gear mechanism connected to the reduction output shaft 16a is built in the actuator housing 16h of the actuator 16.

  An output shaft of the reduction gear mechanism, that is, a reduction output shaft 16a serving as an output shaft of the actuator protrudes from the actuator housing 16h. The motor inside the actuator 16 is a step motor. In this case, the rotation output of the step motor is decelerated by the reduction gear mechanism, and the first shaft portion 10a is rotated by a minute angle of plus or minus 2 degrees.

  Next, FIG. 3 is a perspective view of the concave mirror part of the head-up display device in which the parts are assembled. As shown in FIGS. 2 and 3, the first support portion 11 and the second support portion 14 (hereinafter also simply referred to as the support portions 11 and 14) integrated with the support body 18 forming the housing 1 of FIG. 1. ) Is formed of a metal plate bent entirely in a U-shape, and shaft holes 12 and 13 into which the rotating shaft 10 of the concave mirror 5 is inserted are formed in the support portions 11 and 14, respectively.

  The concave mirror 5 has a curved substantially flat plate shape, and on both the left and right sides, a first shaft portion 10a (FIG. 2) and a second shaft portion 10b (FIG. (Also referred to as portions 10a and 10b). Here, the second shaft portion 10b on the right side in FIG. 3 has a normal rod shape, and is inserted into the second shaft hole 13 of the second support portion 14 after the second spring 15 is mounted. ing.

  Further, the first shaft portion 10a on the left side of FIG. 2 is formed with a square hole 10c at the center, and the first shaft portion 10a is a first shaft hole provided in the first support portion 11. 12 is arranged at a position facing 12.

  Then, the decelerating output shaft 16a of the actuator 16 is inserted into the first shaft hole 12 and fitted into the hole 10c of the first shaft portion 10a, so that the concave mirror 5 rotates through the decelerating output shaft 10a. Is configured to do.

  A signal from a control circuit (not shown) communicates with the connector 16d and the wiring 16c led out from the actuator housing 16h. Thereby, the actuator 16 rotates the deceleration output shaft 16a clockwise or counterclockwise and rotates the concave mirror 5 by a minute angle in accordance with the operation of the occupant.

  As shown in FIG. 3, the support portions 11 and 14 bent in a U shape are continuously configured with a case substrate 18 integrated with the housing 1. On the left side of the case substrate 18, a lower spring locking portion 19 a that holds one end of the first spring 19 is protruded.

  As described above, the holding plate 50 that holds the concave mirror 5 is driven to decelerate by the actuator 16 in which the reduction gear mechanism is incorporated. Further, the inclination angle of the holding plate 50 with respect to the support portion 11 is controlled by the rotation of the actuator 16.

  4 shows a state in which the configuration of the concave mirror shown in FIGS. 2 and 3 and the drive mechanism thereof is incorporated in the housing 1 of the actual head-up display, and the head viewed from the direction of the arrow Z4 in FIG. It is a housing | casing internal block diagram of an up display.

  In FIG. 4, flange portions 16 f 1 and 16 f 2 which are attachment feet of the actuator 16 are screwed to the support portion 11. A holding plate 50 that holds the concave mirror 5 is provided on the back side of the support portion 11.

  In the actuator 16, a part of the actuator housing 16h protrudes to form a wiring coupling portion 16h1. The screw mounting holes provided in the flange portions 16f1 and 16f2 integrated with the actuator housing 16h have an inner diameter larger than the diameters of the screws 20 and 21, or are formed as long holes as described later.

  In FIG. 4, the actuator 16 is in a stopped state, and the concave mirror 5 is in an initial position after completion of assembly. In this state, when the concave mirror 5 and the holding plate 50 are inadvertently rotated in the arrow Y4 direction due to a backlash of the reduction gear mechanism in the actuator 16, the concave mirror 5 and the holding plate 50 are part of the housing 1c. May cause noise or breakage. Therefore, a manufacturing method is desired in which the concave mirror 5 and the holding plate 50 are not moved in the direction of the arrow Y4 due to backlash or the like from the initial position after the assembly is completed.

  FIG. 5 is an internal configuration diagram of the actuator showing the state of the reduction gear mechanism in the actuator 16. FIG. 6 is a plan view showing a state of teeth of a stopper gear serving as a driven gear that meshes with a drive gear directly connected to the output shaft of the motor in the reduction gear mechanism of FIG. FIG. 7 is a schematic diagram showing the configuration of the gear train of the reduction gear mechanism.

  In FIG. 5, the reduction gear mechanism is a driven gear (stopper) in which a plurality of second teeth mesh with a plurality of first teeth of a drive gear G1 formed of a pinion gear attached to an output shaft of a motor in an actuator housing 16h. It is also called a gear). A holding plate 50 is connected to the stopper gear G2 via other gear trains G3, G4, and G5.

  The shape of the stopper gear G2 that is the first-stage driven gear is as shown in FIG. 6, and is formed as a partial gear in which a part of the tooth is embedded in the second tooth, and the protruding stopper portion Gs is formed. Is formed. Therefore, even if the motor and the drive gear G1 rotate, when the first tooth of the drive gear G1 comes into contact with the stopper portion Gs that is a simple protrusion or a large tooth portion, the drive gear G1 is idled or locked.

  Whether to idle or lock depends on the shape of the stopper portion Gs. As a result, the gear train below the stopper gear G2 does not rotate any more in either idling or locking. Further, the reduction rotating shaft 16a serving as the output shaft of the actuator 16 is not driven any more.

  In addition, since the reduction gear mechanism is built in the actuator housing 16h, even if the first tooth of the drive gear G1 comes into contact with the stopper portion Gs and the stopper action is exerted, there is a sound leaking outside the actuator housing 16h. Since there are few, a head-up display with little noise can be obtained.

  Further, a motor made of a step motor exists on the other side of the wall 16k in FIG. 5 in the actuator housing 16h, and a drive gear G1 made of a pinion is coupled to the output shaft of the motor. The wall portion 16k and the actuator housing 16h are fixed. Further, gear shafts of gear trains G2, G3, G4, and G5 are rotatably supported on the wall portion 16k.

  In FIG. 5, the output shaft of the step motor constituting the motor has a pinion constituting the drive gear G1. The pinion drives the stopper gear G2 that is the first-stage driven gear, and the second-stage driven gear G3 meshes with the back gear G21 (FIG. 6) of the stopper gear G2, so that the second-stage driven gear is engaged. G3 is driven.

  Next, the third-stage driven gear G4 is engaged with the back gear (not shown) of the second-stage driven gear G3 to drive the third-stage driven gear G4, and the third-stage driven gear G4. The fourth-stage driven gear G5 meshes with the surface gear G41, and the fourth-stage driven gear G5 is driven. This state is also illustrated in FIG.

  The driven gear G5 in the fourth stage constitutes the output gear of the reduction gear mechanism, and a reduction output shaft 16a (FIG. 2) that forms the output shaft of the actuator 16 is provided at an eccentric position of the output gear. ing. The tip of the deceleration output shaft 16a has a square cross section.

  The motor stator of the actuator 16 is fixed to the actuator housing 16h. Therefore, when the actuator housing 16h is fixed to the housing 1 and the motor, that is, the drive gear G1 is rotated clockwise in FIG. 5, the drive gear G1 rotates until it abuts against the stopper portion Gs of the stopper gear G2.

  During this rotation, the stopper gear G2 rotates counterclockwise, the gear G3 rotates clockwise, the gear rotates counterclockwise, and the gear G5 and the deceleration output shaft 16a rotate clockwise. When the deceleration output shaft 16a is in a clockwise state and the deceleration output shaft 16a is fixed and the actuator housing 16h is not fixed to the housing 1, the actuator housing 16h is counterclockwise. That is, it rotates in the direction of arrow Y5.

  Next, when the deceleration output shaft 16a is fixed without energizing the motor and the actuator housing 16h is rotated in the direction of the arrow Y5, the gear trains G1, G2, G3, G4, and G5 are replaced with the drive gear G1. The stopper works to abut against the stopper portion Gs of the stopper gear G2 and rotates until the backlash is eliminated. Further, in order to stop the rotation of the deceleration output shaft 16a, the planar portion of the rectangular hole 10c of the shaft portion 10a of FIG. 2 that faces the planar portion of the deceleration output shaft 16a via a clearance comes into contact with this planar surface. The backlash between parts is also eliminated.

  The backlash of the flat portion of the rectangular hole 10c of the shaft portion 10a will be described in detail below. As described with reference to FIGS. 2 and 3, the concave mirror 5 is formed by projecting the first shaft portion 10 a and the second shaft portion 10 b forming the rotation shaft 10 on the left and right sides as a whole. Further, the first shaft portion 10 a on the left side of FIG. 2 has a square hole 10 c formed at the center, and the first shaft portion 10 a is a first shaft hole 12 provided in the first support portion 11. It arrange | positions in the position facing.

  And the front-end | tip part which has the square cross section of the deceleration output shaft 16a of the actuator 16 is inserted in the 1st shaft hole 12, and is fitted with the square-shaped hole 10c of the 1st shaft part 10a. Accordingly, the concave mirror 5 is configured to rotate through the first shaft portion 10 a by the rotation of the actuator 16.

  The deceleration output shaft 16a is fitted into the rectangular hole 10c of the holding plate 50 via a minute clearance C8 (FIG. 8) (it cannot be fitted without a clearance). That is, the actuator 16 and the holding plate 50 are connected in a loosely fitted state so that the holding plate 50 rotates as the deceleration output shaft 16a rotates.

  According to this, variation in the rotational position of the holding plate 50 with respect to the rotational position of the deceleration output shaft 16a of the actuator 16 occurs due to the looseness caused by the loose fitting state between the deceleration output shaft 16a of the actuator 16 and the holding plate 50. .

  This variation overlaps with the backlash of the reduction gear mechanism in the actuator 16 to cause a large variation in the inclined position of the holding plate 50 as a whole, but it is desired to assemble in a state in which these variations are eliminated. Accordingly, it is possible to avoid inadvertent movement in the direction in which the holding plate 50 and the housing 1 collide further due to variations after the assembly is completed.

  8 to 10 schematically show a state in which the tip end portion of the deceleration output shaft 16a of the actuator 16 having the above-described square cross section is inserted into the same square hole 10c. Note that the tip of the deceleration output shaft 16a and the rectangular hole 10c are shown exaggerated and larger than actual.

  2 and 3, the right second shaft portion 10 b is inserted into the second shaft hole 13 of the second support portion 14 after inserting the second spring 15 in advance. insert. Next, the first shaft portion 10 a is opposed to the first shaft hole 12.

  The left first shaft portion 10 a has a square hole 10 c at the center, and the first shaft portion 10 a is opposed to the first shaft hole 12 formed in the first support portion 11. Then, the actuator 16 is attached to the first support portion 11 in a temporarily tightened state using screws 20 and 21.

  Then, the output shaft 16 a of the actuator 16 is inserted into the rectangular hole 10 c of the first shaft portion 10 a at the left end of the concave mirror 5. The tip of the deceleration output shaft 16a of the actuator 16 is a quadrangular projection that matches the quadrangular hole 10c of the first shaft portion 10a, and both of them can be rotated together by fitting.

  Next, the actuator housing 16h is rotated in the direction of the arrow Y5 in FIG. 5 with respect to the fixed reduction output shaft 16a by setting the inclination angle θ of the holding plate 50, and the reduction gear mechanism in the actuator housing 16h. The stopper action is exhibited and the state without backlash is maintained. In this state, the inclination angle θ of the holding plate 50 with respect to the housing 1 or the support portion 11 is determined. This will be described with reference to FIGS.

  FIG. 8 is a schematic diagram showing the attachment state of the holding plate holding the concave mirror and the actuator, and FIG. 9 is a state in which the rotating force is applied to the actuator housing from the state shown in FIG. FIG. 10 is a schematic diagram showing a state in which the backlash is eliminated. FIG. 10 is a state in which the tilt angle is determined by a jig after the thrust force is applied to the actuator housing in the state shown in FIG. 9 to fix the actuator housing. It is a schematic diagram which shows the state to do.

  As shown in FIG. 8, even if the inclination angle θ of the holding plate 50 when the actuator 16 is stationary at a predetermined position (assembled state) can be set correctly, backlash of the reduction gear mechanism in the actuator 16 or the like can occur. The inclination angle of the holding plate 50 may vary, and a collision between the holding plate 50 and the housing 1 may occur. That is, in FIG. 8, the rotation due to the backlash in the counterclockwise direction Y81 causes a collision and becomes a problem.

  The backlash means that the deceleration output shaft 16a moves with respect to the actuator housing 16h until the tooth portions come into contact with each other. That is, before the backlash occurs, there is a gap between the tooth portions. This gap can be eliminated by fixing the deceleration output shaft 16a and rotating the actuator housing 16h in the direction of arrow Y5 in FIG. 5, that is, in the direction of arrow Y9 in FIG.

  For this purpose, as shown in FIG. 9, a rotational force F9 is applied to the actuator housing 16h with a jig, and the actuator housing 16h is slightly rotated with respect to the deceleration output shaft 16a as indicated by an arrow Y9. It is assumed that there is no backlash of the reduction gear mechanism in the actuator 16, that is, the holding plate 50 cannot move further in the collision direction due to backlash. Further, there is no backlash due to the clearance between the shaft portion 10a and the rectangular hole 10c.

  Next, in order to maintain this state, the actuator housing 16h is fixed. The actuator housing 16h is fixed by pressing the actuator housing 16h against the support portion 11 (a part of the housing 1) of FIG. 2 which is an actuator mounting member, and the frictional force between the actuator housing 16h and the support portion 11 By increasing For this purpose, a pressing force F10 is applied to the actuator housing 16h in a direction perpendicular to the paper surface of FIG.

  In this way, the actuator housing 16h is rotated in the direction of the arrow Y9 with respect to the deceleration output shaft 16a, so that there is no backlash of the reduction gear mechanism in the actuator 16, and the actuator 16 can move without any further rotation. After setting the actuator housing 16h so as not to rotate, the inclination angle θ of the holding plate 50 is fixed.

  In determining the inclination angle θ, as shown in FIG. 10, the side surface of the holding plate 50 is applied to the inclined surface JG1 of the jig JG while maintaining a state in which the reduction gear mechanism in the actuator 16 is not backlashed. By making contact, the inclination angle θ with respect to the support portion 11 and thus the casing 1 is determined. In this way, by bringing the side surface of the holding plate 50 into contact with the inclined surface of the jig, the inclination angle θ of the holding plate 50 with respect to the housing 1 can be accurately determined.

  As a result, the inclination angle of the holding plate 50 with respect to the support portion 11 (the casing 1) in a state where the stopper action is exhibited in the actuator 16 and the deceleration output shaft 16a cannot rotate in the collision direction due to backlash or the like. θ can be determined. Thereafter, the screws 20 and 21 of the flange portions 16f1 and 16f2 are finally tightened and fixed. Next, as shown in FIG. 3, the first spring 19 is attached between the lower spring locking portion 19 a provided on the case substrate 18 and the upper spring locking portion 23 of the holding plate 50 of the concave mirror 5.

  As a result, a force to rotate the concave mirror 5 in one direction is exerted on the concave mirror 5 by the spring force of the first spring 19, and when the concave mirror 5 is rotated in the other direction by the actuator 16, Receives elastic force. Therefore, backlash due to the gear inside the actuator 16 after completion of the assembly is suppressed by the first spring 19.

  In other words, after the assembly is completed, when the concave mirror 5 is rotated by the actuator 16 in a state where there is backlash, even if the concave mirror 5 is stopped, the concave mirror 5 is vibrated by a small angle clockwise or counterclockwise by the backlash. As a result.

  Therefore, as shown in FIG. 3, one end of the first spring 19 is locked to the upper spring locking portion 23, and the other end of the first spring 19 is locked to the lower spring locking portion 19a of the case substrate 18. Then, the vibration of the backlash after the assembly is completed is continuously suppressed by the spring force of the first spring 19.

  Further, as shown in FIG. 3, the first spring 19 is attached by moving the attachment position of the lower first spring locking portion 19a of the first spring 19 at a predetermined angle toward the outside, that is, the left side of FIG. Since it is attached at an angle, the first spring 19 performs the action of pulling the concave mirror 5 to the left side in the thrust direction S, thereby suppressing the vibration in the thrust direction S of the concave mirror 5 together with the second spring 15. Yes.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. In the following embodiments, the same components as those in the first embodiment described above are denoted by the same reference numerals, description thereof will be omitted, and different configurations and features will be described. FIG. 11 is an outline view of the actuator 16 used in the second embodiment of the present invention. FIG. 11 (a) is a front view of the actuator, and FIG. 11 (b) is a right side view of the actuator. It is.

  In FIG. 8, holes larger than the diameter of the screws (20 and 21 in FIG. 3) are formed in the flange portions 16f1 and 16f2 constituting the mounting feet of the actuator 16, and the screws are first formed in the flange portions 16f1 and 16f2. 9 is applied to the actuator housing 16h by applying a rotational force as indicated by an arrow Y9 in FIG. 9 to absorb backlash and adjusting the inclination of the holding plate 50 with a jig, and then the flange portion 16f1. , 16f2 screw was completely tightened.

  At this time, since the holes larger than the diameter of the screw were formed in the flange portions 16f1 and 16f2, the screw moved within the hole, and the backlash was absorbed and the inclination angle of the holding plate 50 could be adjusted. .

  The long holes 16f3 and 16f4 can be formed in the flange portions 16f1 and 16f2 as in the second embodiment in preparation for the case where the amount of movement of the screw in the hole for absorbing the backlash is large. desirable. According to this, when the backlash is absorbed and when the inclination of the holding plate 50 is adjusted, the screw in the temporarily tightened state is rotated during the rotation as indicated by the arrow Y9 in FIG. 9 about the deceleration output shaft 16a of the actuator housing 16h. It can be tightened after moving a long moving amount.

  The center positions of the long holes 16f3 and 16f4 exist on a circle centered on the deceleration output shaft 16a. As shown in FIG. 11B, the tip of the deceleration output shaft 16a of the actuator 16 is a quadrangular protrusion that matches the quadrangular hole 10c. Therefore, it has two plane parts 16a1 and 16a2 which oppose the front-end | tip part of the deceleration output shaft 16a, and this plane part mutually opposes the plane part in the hole 10c via clearance. The tip of the deceleration output shaft 16a and the rectangular hole 10c can be rotated together by fitting, but both ends of the flat portions 16a1 and 16a2 are processed into an arc shape.

(Other embodiments)
The present invention is not limited to the above-described embodiments, and can be modified or expanded as follows. For example, in the above-described embodiment, the reduction gear mechanism is formed of a set of spur gears, but other reduction gear mechanisms may be used.

  The inclination angle θ is set by abutting a jig having an inclined surface. However, the inclination angle θ may be set by other methods using a jig or the like for setting a gap width for preventing a collision. . The stopper portion in the reduction gear mechanism is formed by the drive gear coming into contact with the projection of the partial gear. However, any other collision stop mechanism may be used as long as it is within the actuator housing 16h.

  Furthermore, in the first embodiment, the actuator housing 16h is rotated in the direction of the arrow Y9 with respect to the deceleration output shaft 16a, so that there is no backlash of the reduction gear mechanism in the actuator 16, and the actuator 16 is not rotated any more. Otherwise, the actuator housing 16h is pressed in the thrust direction S (the axial direction of the deceleration output shaft 16a or the axial direction of the holding plate 50) to fix the actuator housing 16h with frictional force. However, the actuator housing 16h may be held and fixed with a jig or a robot hand. The motor in the actuator 16 is a step motor, but a reversible motor capable of controlling the rotational position, such as a DC servo motor, can be used.

DESCRIPTION OF SYMBOLS 1 Housing | casing 1c Part of housing | casing 1 5 Concave mirror 10a 1st axial part 10b 2nd axial part 10c Square-shaped hole 11 1st support part 16 Actuator 16a Deceleration output shaft 16h Actuator housing 16f1, 16f2 Flange part 19 First spring 20, 21 Screw 50 Holding plate G1 Drive gear G2 First stage driven gear (stopper gear)
Gs Partial gear stopper JG Jig JG1 Jig inclined surface θ Inclination angle

Claims (6)

A head-up that adjusts an inclination angle of the holding plate with respect to the casing by driving the holding plate that holds the concave mirror in the casing by using a motor and a reduction gear mechanism that are held by the actuator housing in the casing. A display manufacturing method comprising:
The reduction output shaft of the reduction gear mechanism is connected to the holding plate so that the holding plate rotates as the reduction output shaft rotates,
A rotational force for rotating the actuator housing is applied to maintain the state in which the stopper portion of the driven gear driven by the first gear in the reduction gear mechanism is in contact with the housing of the holding plate with respect to the housing A method for manufacturing a head-up display, wherein an inclination angle is set.   In order to set the inclination angle of the holding plate with respect to the housing while maintaining the state in which the driving gear is in contact with the stopper portion, the holding force is applied while applying the rotational force that rotates the actuator housing. 2. The method of manufacturing a head-up display according to claim 1, wherein after the inclination angle of the plate is adjusted, the actuator housing is fixed with screws so as not to rotate with respect to the housing.   The screw is fixed by pressing the actuator housing, which is temporarily tightened against the housing, against the housing in the axial direction of the deceleration output shaft with a jig, and a frictional force between the actuator housing and the housing. 3. The method of manufacturing a head-up display according to claim 1, wherein the screw is finally tightened after the actuator housing is held with respect to the casing.   While setting the inclination angle of the holding plate with respect to the housing, the actuator housing is rotated while the deceleration output shaft is fixed to the housing when the rotational force is applied to the actuator housing. The head-up display according to any one of claims 1 to 3, wherein the driving gear is rotated with respect to the stopper portion, and the driving gear is brought into contact with the stopper portion. Production method.   When the reduction output shaft of the reduction gear mechanism is connected to the holding plate so that the holding plate rotates as the reduction output shaft rotates, the reduction output shaft is loosened in the hole of the holding plate. The flat part of the deceleration output shaft is opposed to the flat part of the hole of the holding plate in the rotational direction of the deceleration output shaft via a clearance. The manufacturing method of the head-up display of claim | item.   The holding of the holding plate on the inclined surface of the jig is performed when the inclination angle of the holding plate with respect to the housing is set while the actuator housing is rotated and the driving gear is kept in contact with the stopper portion. The method for manufacturing a head-up display according to claim 1, wherein the inclination angle of the holding plate with respect to the housing is set by bringing a plate into contact therewith.

Images