JP5682054B2 - Head-up display - Google Patents

Description

  The present invention relates to a head-up display that reflects display light emitted from a display, irradiates the reflected light on a windshield, and allows the reflected light irradiated on the windshield to be observed in a vehicle interior. It is.

  Conventionally, a projection display unit called a head-up display (HUD) device that displays a virtual image using a predetermined projection area of a windshield as a reflection surface for improving the visibility of a driver is partly used. It is used in car models. In this head-up display device, a display element made of, for example, a liquid crystal panel and a reflection member are accommodated in a housing in which an emitting portion is formed, and display light (display image) of the display element is reflected through a reflection member (reflection unit). A display is performed by irradiating a predetermined irradiation member such as a windshield of an automobile through the emitting portion.

  The reflection unit is held through a holder member, and is provided to be rotatable about a predetermined rotation axis so that the position of the display image irradiated on the windshield as an irradiation member can be moved to adjust the position. At this time, the holder member is provided with a pair of shaft portions (supported portions) that project to the periphery along the rotation axis, and on the other hand, on the housing side, a pair of bearing portions that support the pair of shaft portions ( A support member) is provided, and the shaft member is supported by the bearing unit so that the reflecting member held through the holder member can rotate.

  Such a reflection unit is disclosed in Patent Document 1, for example. FIG. 9 is an exploded perspective view showing a display unit of a conventional head-up display. FIG. 10 is a cross-sectional view showing a display unit of a conventional head-up display. The reflection unit 5 includes a reflection member 10 and a holder member 20. Among these, the reflecting member 10 is composed of a concave mirror in which a reflecting film is formed on the surface of a base material made of a synthetic resin material by means such as vapor deposition.

  The holder member 20 is made of, for example, a black synthetic resin material, and includes a holding portion 21, a gear portion 22, a pair of first and second supported portions 23 and 24, and a pair of restricting portions 25 and 26. ing. The holding part 21 extends along the reflecting member 10 and adheres to and holds the reflecting member 10. The gear portion 22 is formed on the opposite side of the holding portion 21 to the side to which the reflecting member 10 is bonded, and is connected to an output gear (not shown) of the actuator.

  The pair of first and second supported portions 23 and 24 are provided so as to sandwich the reflecting member 10 along the rotation axis AX when the holder member 20 is rotated through the actuator (not shown). Thus, it is rotatably supported by the housing through a pair of support portions described later. Of the pair of first and second supported parts 23 and 24, the first supported part 23 is located on the opposite side of the holding part 21 from the side to which the reflecting member 10 is bonded, and is cylindrical ( It is formed in a bag shape and is open so that one of the pair of support portions can be inserted.

  The second supported portion 24 is a shaft portion having a narrow cross-section by using a protruding piece 28 that is bent from the holding portion 21 and protrudes further laterally from the outer wall surface of the extension portion 27 that extends to the side of the reflecting member 10. And can be inserted into the other of the pair of support portions.

  The pair of restricting portions 25 and 26 is formed of a flange-shaped portion having a wide cross section formed so as to sandwich the second supported portion 24 using the protruding piece 28, and the second supported portion 24 is connected to the other of the above-described portions. When inserted into the support portion, it abuts against a part of the support portion and restricts the movement of the second supported portion 24 in the direction of the rotation axis AX. In this case, the interval between the restricting portions 25 and 26 allows the second supported portion 24 to be inserted into the other supporting portion. However, when the insertion is completed, the second supported portion 24 is moved in the direction of the rotation axis AX. It is set to a size that can be prohibited.

JP 2008-185790 A

The conventional head-up display described above has the following problems to be solved.
That is, in order to constitute the reflection unit 5, in addition to the reflection member 10, it is necessary to assemble a holder member 20 that pivotally supports the reflection member 10 with respect to the housing. For this reason, the increase in the number of parts leads to an increase in parts cost and assembly man-hour, resulting in an increase in the manufacturing cost of the head-up display. Further, since the reflecting member 10 is assembled to the holder member 20 which is a separate part by the holding mechanism, an error in assembling the reflecting member 10 and an accuracy error of the reflecting surface in the entire display unit increase, and reflected light (reflected image). However, there is an inconvenience that it is perceived as display light (display image) accompanied by unevenness and ghost.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to integrally form a rotating shaft that rotatably supports a mirror member body as a reflecting member, thereby reducing the component cost. In addition, the accuracy of the reflecting surface is prevented from being impaired by the depression (SINK MARK) generated on the surface of the mirror member main body due to the integral molding, thereby reducing the accuracy of the reflecting surface. The object is to provide a head-up display capable of maintaining the quality of the display image.

In order to achieve the above-described object, the head-up display according to the present invention is characterized by the following (1) to (3).
(1) A head-up display that includes a mirror member that reflects display light emitted from a display and irradiates the reflected light toward a windshield, and allows the reflected light from the windshield to be observed in a vehicle interior. There,
The mirror member is
A mirror member body;
A reflecting surface formed on the surface of the mirror member body for reflecting the display light toward the windshield;
A cylindrical rotation shaft protruding in an extending direction of the surface from at least one of the end surfaces intersecting the surface of the mirror member body;
Have
The end surface of the mirror member main body is located on the back side of the mirror member main body facing the surface with respect to an intersection line where the surface of the mirror member main body intersects the end surface on which the rotary shaft protrudes. Protruding from the
The reflection surface is formed on the surface from the center through the ineffective reflection region rather than the base end of the rotating shaft when the mirror member body is seen through from a direction perpendicular to the surface of the mirror member body. Yes,
about.
(2) A head-up display configured as described in (1) above,
The rotation shaft has a diameter smaller than the width of the mirror member main body in the front and back direction at the end surface on which the rotation shaft is provided, and the entire rotation shaft is located inside the end surface when the rotation shaft is viewed from the protruding direction. To
about.
(3) A head-up display configured as described in (1) above,
A part of the rotating shaft is located on the back side from an intersection line where the surface of the mirror member main body and the end surface on which the rotating shaft protrudes, and the other part is the mirror member. It is located on the back surface side from the intersection line where the back surface of the main body and the end surface on which the rotating shaft protrudes,
about.

According to the head-up display configured as described in (1) above, a stepped portion is formed between the front surface of the mirror member main body and the rotating shaft at the intersection, and the mirror member main body and the rotating shaft are formed at the portion where the stepped portion is formed. Although the properties of cooling and solidification (volume shrinkage) change according to the molding conditions such as the melting temperature, injection pressure, holding pressure, injection amount, etc. of the molten resin that integrally molds, the rotating shaft is on the back side from the surface of the mirror member body Therefore, by suppressing the influence of the property change on the surface of the mirror member main body, sink marks generated on the surface side of the mirror member main body are minimized. In addition, by ensuring the effective reflection area inside the invalid reflection area as an invalid reflection area of the reflection mirror as an area where this sinking occurs, the reflection surface of the mirror member body can be maintained at a predetermined accuracy. As a result, a display image (display light) with high display quality due to the reflected light reflected by the reflecting surface can be viewed on the passenger compartment side.
Further, according to the head-up display having the structure of (2), the base end of the rotating shaft is connected to the end face of the mirror member main body within the thickness of the mirror member main body. Sinks generated on the front and back sides of the mirror member main body during cooling and solidification of the molten resin by the molding can be minimized. Also in this case, unevenness of reflected light can be effectively prevented by setting the area where the sink marks are generated as the ineffective reflection area provided around the effective reflection area. Therefore, it can be avoided that the thickness of the aluminum vapor deposition when the reflecting surface is formed becomes uneven or uneven. As a result, a display image (display light) with high display quality due to the reflected light reflected by the reflecting surface can be viewed on the passenger compartment side.
Further, according to the head-up display configured as described in (3) above, the mirror member main body and the rotation are formed at the step portion formed between the surface of the mirror member main body and the rotation shaft and between the back surface of the mirror member main body and the rotation shaft. The shaft is a mirror member, although the properties during cooling and solidification (volume shrinkage) change according to the molding conditions such as the melting temperature, injection pressure, holding pressure, injection amount, etc. of the molten resin that integrally molds the shaft with a mold. Since it is in a position retracted from the front surface of the main body to the rear surface side and protrudes from the rear surface of the mirror member main body, there are sufficiently fewer sink marks generated on the surface of the mirror member main body than the sink marks generated on the rear surface of the mirror member main body. Can be suppressed.

In order to achieve the above-described object, the head-up display according to the present invention is characterized by the following (4) to (5).
(4) A head-up display that includes a mirror member that reflects display light emitted from the display and irradiates the reflected light toward the windshield so that the reflected light from the windshield can be observed in the vehicle interior. There,
The mirror member is
A mirror member body;
A reflecting surface formed on the surface of the mirror member body for reflecting the display light toward the windshield;
From the back surface of the mirror member body facing the surface, a cylindrical rotation shaft protruding in the extending direction of the surface;
Have
The reflection surface is formed on the surface from the center rather than the base end of the rotating shaft protruding from the back surface when the mirror member body is seen through from a direction perpendicular to the surface of the mirror member body. ,
about.
(5) The head-up display configured as described in (4) above,
The rotating shaft partially protrudes from the back surface of the mirror member body, and the other portion protrudes from the end surface intersecting the surface of the mirror member body in the extending direction of the back surface.
about.

According to the head-up display configured as described in (4) above, the reflection surface is formed so as to avoid the vicinity of the corresponding portion of the base end on the surface of the mirror member body. When molded, it can be prevented from being affected by sink marks generated on the surface of the mirror member main body. Thereby, the unevenness of the reflected light reflected by the reflecting surface can be surely avoided.
Further, according to the head-up display having the configuration of (5) above, the portion where the rotation shaft protrudes from the back surface of the mirror member main body has a larger change in cross-sectional area than the other portions. Although sink marks occur due to significant changes in properties during cooling and solidification (volume shrinkage) according to molding conditions such as resin melting temperature, injection pressure, holding pressure, and injection amount, the rotation axis is the back surface of the mirror member body. Although the sink on the back surface is increased, the sink on the front surface can be suppressed to be small. Therefore, by forming a reflection surface in the effective reflection area surrounded by the ineffective reflection area where the occurrence of the sink mark is an ineffective reflection area, it is possible to irradiate the windshield with uneven reflection light. The reflected image that has passed can be viewed as a uniform display light (display image) by the driver in the passenger compartment.

  According to the present invention, the reflecting member is integrally formed with a shaft that rotatably supports the reflecting member, thereby reducing the cost of parts and preventing the occurrence of mounting errors. It is possible to maintain the quality of the display light (display image) by preventing the accuracy of the reflecting surface from being impaired by sink marks.

  The present invention has been briefly described above. Further, details of the present invention will be further clarified by reading through the modes for carrying out the invention described below with reference to the accompanying drawings.

It is a perspective view which shows the head-up display concerning the 1st Embodiment of this invention. It is a perspective view of the mirror member main body shown in FIG. It is a front view of the mirror member main body shown in FIG. It is a top view of the mirror member main body shown in FIG. It is a principal part of the mirror member main body of 2nd Embodiment of the mirror member main body in this invention, (a) is a top view of the principal part, (b) is a side view of the principal part. It is a principal part of the mirror member main body of 3rd Embodiment of the mirror member main body in this invention, (a) is a top view of the principal part, (b) is a side view of the principal part. It is a principal part of the mirror member main body of 4th Embodiment of the mirror member main body in this invention, (a) is a top view of the principal part, (b) is a side view of the principal part, (c) is the principal part. FIG. It is a principal part of the mirror member main body of 5th Embodiment of the mirror member main body in this invention, (a) is a top view of the principal part, (b) is a side view of the principal part, (c) is the principal part. FIG. It is a disassembled perspective view which shows the display unit of the conventional head-up display. It is a cross-sectional view showing a display unit of a conventional head-up display.

  Hereinafter, a head-up display according to an embodiment of the present invention will be described with reference to FIGS.

(First embodiment)
FIG. 1 is a perspective view showing a head-up display according to the present embodiment.
The head-up display of this embodiment shown in FIG. The mirror member A includes a frame 51, a mirror member main body 52, a rotating shaft 53, and a mirror driving unit 54. Of these, the frame 51 is formed of a substantially rectangular box whose front and upper sides are open, and a mirror member main body 52 is rotatably interposed between a pair of side plates 51a and 51b facing each other. Further, a shaft support hole 55 for rotatably supporting the rotary shaft 53 is formed at a position where the side plates 51a and 51b face each other. The frame 51 is composed entirely of a black synthetic resin plate or metal plate.

  As shown in FIGS. 2 to 4, the mirror member main body 52 is formed of a rectangular plate material having, for example, a spherical surface so that the front surface (surface) 56 is recessed as a whole, and this is molded by a synthetic resin. ing. The rotating shafts 53 project integrally from the left and right end surfaces of the mirror member main body 52 at positions facing each other above the center line L in the vertical height of the mirror member main body 52. Further, as shown in FIGS. 6A and 6B, the rotation shaft 53 is more than the intersection line between the surface 56 of the mirror member main body 52 and the end surface 57 on which the rotation shaft 53 projects. The mirror member body 52 protrudes from the end surface 57 so as to be located on the back surface 58 side of the mirror member main body 52 facing the front surface 56. These rotating shafts 53 are formed integrally with the mirror member main body 52 when the mirror member main body 52 is molded. These rotary shafts 53 are supported so as to be rotatable with respect to the shaft support holes 55 of the side plates 51a and 51b of the frame 51 either directly or indirectly through bearings (not shown).

  In the present embodiment, as described above, the mirror member main body 52 and the rotating shafts 53 protruding from both ends thereof are integrally formed of synthetic resin. For this reason, compared with the case where these are configured as separate parts, the parts cost and man-hours are reduced, the cost as a mirror member can be reduced, and the amount of these assembling operations is eliminated, and this assembling error is eliminated. The advantage of being able to do is obtained.

  Further, the surface (concave surface) 56 of the mirror member main body 52 is a display light (display image) passing area (effective reflection area) that reflects light from the light source (backlight) toward the windshield through the display device. A reflective surface 59 formed by vapor deposition of aluminum is provided. Note that a four-round region surrounding the reflection surface 59 on the front surface 56 of the mirror member main body 52 is an invalid reflection region 60 that is not used for reflection of a display image.

  One rotating shaft 53 is connected to a drive shaft (not shown) of the mirror drive unit 54. Although not shown, the mirror driving unit 54 includes a motor that rotates forward and backward based on a switch operation of a driver and the like, and a speed reducer that reduces (decelerates) the rotation speed of the motor. Therefore, the mirror member main body 52 integral with the rotary shaft 53 can be tilted by an angle designated by the switch operation by driving the motor. The locking pin 61 is one end face of the mirror member main body 52 and is fixed to a position below the rotation shaft 53 or is integrally formed with the mirror member main body 52.

  Each end of the vibration preventing spring (coil spring) 62 is locked between a locking pin 61 and a locking portion 51c below the side plate 51a. The vibration preventing spring 62 always pulls the mirror member body 52 in one direction by its own repulsive force (contraction force). For this reason, when the drive of the motor is stopped and the tilt angle of the mirror member main body 52 is stopped at the specified angle, the backlash between the transmission gears is absorbed, thereby the meshing state of the transmission gears. That is, the tilt angle of the mirror member main body 52 can be stably maintained.

  By the way, when the mirror member main body 52 and the rotating shaft 53 projecting from both ends of the mirror member main body 52 are integrally formed, generally, various molding conditions, for example, the shape of the mold, resin fluidity at the time of molding (the resin is deep in the mold) Depending on the cooling conditions (cooling time, etc.) and the cooling conditions (cooling time, etc.), sink marks may occur around the portion where the rotating shaft 53 continues on the surface 56 of the mirror member main body 52 after the molding step. When the rotary shaft 53 is integrally formed with the mirror member main body 52 without considering the position at which the rotary shaft 53 protrudes, this sink mark H is centered on the portion where the rotary shaft 53 continues to the surface 56 of the mirror member main body 52. As shown in FIG.

  Therefore, in the mirror member A of the present embodiment, as shown in FIG. 4, a stepped portion is formed between the front surface (front surface) 56 of the mirror member main body 52 and the rotation shaft 53 at the intersection. In the place where this stepped portion occurs, the properties of cooling and solidification (volume shrinkage) according to the molding conditions such as the melting temperature, injection pressure, holding pressure, and injection amount of the molten resin that integrally molds the mirror member main body 52 and the rotary shaft 53. However, since the rotating shaft 53 is in a position retracted to the back surface 58 side from the front surface 56 of the mirror member main body 52, sink marks H generated on the front surface 56 side of the mirror member main body 52 can be minimized.

  Further, in the mirror member A of the present embodiment, even if sink marks H are generated, a region where the sink marks H is generated is regarded as an invalid reflection area of the mirror member main body 52, and an effective reflection area inside the invalid reflection area is sufficiently set. Secured. As a result, the reflecting surface 59 of the mirror member main body 52 can be maintained with a predetermined accuracy, and as a result, a display image (display light) of high display quality by the reflected light reflected by the reflecting surface 59 is displayed on the vehicle compartment side. It can be made observable.

  As described above, in the present embodiment, the rotating shaft 53 is a mirror facing the surface 56 rather than the intersection line where the surface 56 of the mirror member main body 52 and the end surface 57 on which the rotating shaft 53 protrudes. By projecting from the end surface 57 so as to be positioned on the back surface 58 side of the member main body 52, molding conditions such as the melting temperature, injection pressure, holding pressure, and injection amount of the molten resin that integrally molds the mirror member main body 52 and the rotary shaft 53 Even if the properties of cooling and solidification (volume shrinkage) change accordingly, sink marks occurring on the surface 56 side of the mirror member main body 52 can be minimized. Further, by ensuring that the effective reflection area inside the invalid reflection area is sufficiently secured by setting the area where the sink marks are generated as the invalid reflection area, the reflection surface 59 of the mirror member main body 52 can be maintained with a predetermined accuracy. As a result, a display image (display light) of high display quality due to the reflected light reflected by the reflecting surface 59 can be viewed on the passenger compartment side.

(Second Embodiment)
Furthermore, as another embodiment of the mirror member A, as shown in FIGS. 5A and 5B, the rotating shaft 53 is connected to the front and back of the mirror member main body 52 on the end face 57 provided with the rotating shaft 53. The diameter may be smaller than the width in the direction, and the entire rotation shaft 53 may be located inside the end surface 57 when the rotation shaft 53 is viewed from the protruding direction. Specifically, the thickness Q of the mirror member body 52 is equal to or slightly larger than the outer diameter P of the rotating shaft 53 (P ≦ Q).

  In this case, the base end of the rotating shaft 53 is connected to the end face 57 of the mirror member main body 52 within the thickness of the mirror member main body 52, and thus the rotating shaft 53 is connected to the front surface 56 and the back surface 58 of the mirror member main body 52. The step is slightly retracted (that is, a step portion is formed), and the molten resin is cooled by the molding, and sink marks generated on the front surface 56 side and the rear surface 58 side of the mirror member main body 52 at the time of solidification are minimized. Can be suppressed. In this case, the thickness including the rotation shaft 53 of the mirror member A can be suppressed. Further, by setting the area where there is a possibility of sink marks as the invalid reflection area provided around the effective reflection area, unevenness of reflected light can be effectively prevented. Accordingly, it is possible to avoid uneven or uneven thickness of the aluminum vapor deposition when the reflecting surface 59 is formed. As a result, a display image (display light) of high display quality due to the reflected light reflected by the reflecting surface 59 can be observed on the vehicle compartment side.

  As described above, in the present embodiment, the rotation shaft 53 is made smaller in diameter than the width in the front and back direction of the mirror member main body 52, and when the rotation shaft 53 is viewed from the protruding direction, the entire rotation shaft 53 is By being located inside the end surface 57 of the mirror part main body 52, sink marks generated on the front surface 56 side and the rear surface 58 side of the mirror member main body 52 during the cooling and solidification of the mirror member A are minimized. Can be suppressed. Also in this case, by setting the area where the sink marks are generated as an ineffective reflection area provided around the effective reflection area, unevenness of reflected light can be effectively prevented.

(Third embodiment)
Moreover, as another embodiment of the mirror member A, it shows to Fig.6 (a), (b). In this embodiment, a part of the rotation shaft 53 is positioned on the back surface 58 side from the intersection line where the surface 56 of the mirror member main body 52 and the end surface 57 on which the rotation shaft 53 protrudes, and the rotation is performed. The other part of the shaft 53 is positioned on the back surface 58 side with respect to the intersecting line where the back surface 58 of the mirror member main body 52 and the end surface 57 on which the rotation shaft 53 protrudes.

  In this case, the change in the wall thickness between the surface 56 of the mirror member main body 52 and the rotating shaft 53 and the step portion generated between the back surface 58 of the mirror member main body 52 and the rotating shaft 53 is large. Although the properties at the time of cooling and solidification (volume shrinkage) according to molding conditions such as the melting temperature, injection pressure, holding pressure, injection amount, etc. of the molten resin that integrally molds the main body 52 and the rotating shaft 53 with a mold are greatly changed. The entire rotation shaft 53 is located at a position largely retreated to the back surface 58 side from the front surface 56 of the mirror member main body 52, and further protrudes from the back surface 58 of the mirror member main body 52. While the sink marks to be increased, the sink marks generated on the surface 56 of the mirror member main body 52 can be suppressed to be relatively small. Also in this case, by setting the area of sink marks generated on the surface 56 side of the mirror member main body 52 within the ineffective reflection area provided around the effective reflection area, the reflected light with less unevenness is directed to the windshield. Can be irradiated. Therefore, a display image (display light) with high display quality by the reflected light reflected by the reflecting surface 59 can be viewed on the passenger compartment side.

  As described above, in the present embodiment, a part of the rotating shaft 53 is formed on the back surface 58 with respect to a line of intersection between the surface 56 of the mirror member main body 52 and the end surface 57 on which the rotating shaft 53 protrudes. Rotating by positioning the other part of the rotation shaft 53 on the back surface 58 side with respect to the intersection line where the back surface 58 of the mirror member main body 52 and the end surface 57 on which the rotation shaft 53 protrudes intersects. Since the shaft 53 is in a position retracted from the front surface 56 of the mirror member main body 52 to the back surface 58 side and protrudes from the rear surface 58 of the mirror member main body 52, the mirror 53 is compared with sink marks generated on the back surface 58 of the mirror member main body 52. The sink marks generated on the surface 56 of the member main body 52 can be suppressed to be sufficiently small.

(Fourth embodiment)
FIGS. 7A, 7 </ b> B, and 7 </ b> C show other arrangement examples of the rotation shaft 53 with respect to the mirror member main body 52. Here, the rotation shaft 53 protrudes from the back surface 58 of the mirror member body 52 facing the surface of the mirror member body 52 in the extending direction of the surface. The reflection surface 59 is closer to the center than the base end of the rotating shaft 53 protruding from the back surface 58 when the mirror member body 52 is viewed from a direction perpendicular to the front surface 56 of the mirror member body 52. Is formed.

  When the rotating shaft 53 is protruded from the back surface 58, the thickness of the mirror member A greatly changes at the base end of the rotating shaft 53, so that the surface 56 of the mirror member is likely to sink. However, in the present embodiment, the reflection surface 59 is formed so as to avoid the vicinity of the corresponding portion of the base end of the rotation shaft on the surface 56 of the mirror member main body 52, so the rotation shaft 53 is integrated with the reflection surface 59. Therefore, it is possible to avoid the influence of sink marks generated on the surface 56 of the mirror member main body 52. Thereby, the unevenness of the reflected light reflected by the reflecting surface 59 can be avoided reliably.

  As described above, in the present embodiment, the rotation shaft 53 protrudes from the back surface 58 of the mirror member main body 52 facing the surface 56 in the extending direction of the surface 56, and the reflection surface 59 is made to extend to the mirror member main body 52. When the mirror member main body 52 is viewed from a direction perpendicular to the front surface 56, the mirror member main body 52 is formed closer to the center than the base end of the rotary shaft 53 protruding from the back surface 58. The surface 56 of the mirror member main body 52 can be prevented from being affected by sink marks. Thereby, unevenness of the reflected light (intensity and direction) reflected by the reflecting surface 59 formed on the surface 56 can be surely avoided.

(Fifth embodiment)
FIGS. 8A, 8 </ b> B, and 8 </ b> C show other arrangement examples of the rotation shaft 53 with respect to the mirror member main body 52. Here, a part of the rotating shaft 53 protrudes from the back surface 58 of the mirror member main body 52 and the other part extends from the end surface 57 intersecting the front surface 56 of the mirror member main body 52. It is configured to protrude in the direction.

  When a part of the rotating shaft 53 is protruded from the back surface 58, the thickness of the mirror member A greatly changes at the base end of the rotating shaft 53, so that sink marks are generated on the surface 56 of the mirror member. However, since the other part protrudes also from the end surface 57 of the mirror member main body 52 and the sink part is generated also at the end part of the rotating shaft 53 and the end surface 57, the generation of the sink mark on the surface 56 is sufficiently suppressed. be able to. Therefore, a place where the occurrence of sink marks is used as an ineffective reflection area, and the reflection surface 59 is formed in the effective reflection area surrounded by the ineffective reflection area. Can be seen

  As described above, in the present embodiment, a part of the rotation shaft 53 protrudes from the back surface 58 of the mirror member main body 52 and the other part extends from the end surface 57 intersecting the front surface 56 of the mirror member main body 52. As a result, the change in the cross-sectional area of the portion where the rotating shaft 53 protrudes from the back surface 58 of the mirror member main body 52 can be made larger than the other portions, and the melting temperature and injection pressure of the molten resin at the protruding portion can be increased. Even if sink marks occur during cooling and solidification (volumetric shrinkage) according to molding conditions such as holding pressure and injection amount, the back surface 58 protrudes from the back surface 58 of the mirror member main body 52. Although the sink marks on the surface increase, the occurrence of sink marks on the surface 56 can be suppressed. Therefore, by forming the reflection surface 59 in the effective reflection region surrounded by the ineffective reflection region, where the occurrence of sink marks is the ineffective reflection region, the uneven reflected light is transmitted through the windshield in the vehicle interior. The driver can be seen.

A Mirror member 51 Frame 52 Mirror member main body 53 Rotating shaft 54 Mirror drive part 55 Shaft support hole 56 Surface 57 End surface 58 Back surface 59 Reflecting surface 60 Invalid reflection area

Claims (5)

A head-up display that includes a mirror member that reflects display light emitted from a display and irradiates the reflected light toward a windshield, and allows the reflected light from the windshield to be observed in a vehicle interior;
The mirror member is
A mirror member body;
A reflecting surface formed on the surface of the mirror member body for reflecting the display light toward the windshield;
A cylindrical rotation shaft protruding in an extending direction of the surface from at least one of the end surfaces intersecting the surface of the mirror member body;
Have
The end surface of the mirror member main body is located on the back side of the mirror member main body facing the surface with respect to an intersection line where the surface of the mirror member main body intersects the end surface on which the rotary shaft protrudes. Protruding from the
The reflection surface is formed on the surface from the center through the ineffective reflection region rather than the base end of the rotating shaft when the mirror member body is seen through from a direction perpendicular to the surface of the mirror member body. Yes,
Head-up display, characterized in that. The rotation shaft has a diameter smaller than the width of the mirror member main body in the front and back direction at the end surface on which the rotation shaft is provided, and the entire rotation shaft is located inside the end surface when the rotation shaft is viewed from the protruding direction. To
The head-up display according to claim 1. A part of the rotating shaft is located on the back side from an intersection line where the surface of the mirror member main body and the end surface on which the rotating shaft protrudes, and the other part is the mirror member. It is located on the back surface side from the intersection line where the back surface of the main body and the end surface on which the rotating shaft protrudes,
The head-up display according to claim 1. A head-up display that includes a mirror member that reflects display light emitted from a display and irradiates the reflected light toward a windshield, and allows the reflected light from the windshield to be observed in a vehicle interior;
The mirror member is
A mirror member body;
A reflecting surface formed on the surface of the mirror member body for reflecting the display light toward the windshield;
From the back surface of the mirror member body facing the surface, a cylindrical rotation shaft protruding in the extending direction of the surface;
Have
The reflection surface is formed on the surface from the center rather than the base end of the rotating shaft protruding from the back surface when the mirror member body is seen through from a direction perpendicular to the surface of the mirror member body. ,
A head-up display. The rotating shaft partially protrudes from the back surface of the mirror member body, and the other portion protrudes from the end surface intersecting the surface of the mirror member body in the extending direction of the back surface.
The head-up display according to claim 4.

Images