VEHICLE-MOUNTED DEVICE AND DISPLAY DEVICE

A display device includes: a concave mirror which is rotatable about a rotary shaft; and a stay formed of a base portion and a pair of raised wall portions mounted on the base portion in a raised manner and supporting the rotary shaft. The pair of raised wall portions is formed in an obliquely bent manner such that distal end portions of the raised wall portions extend away from each other thus allowing the raised wall portions easily deformable with a load applied in a raised direction.

TECHNICAL FIELD

The present invention relates to a vehicle-mounted device and a display device, and more particularly to a vehicle-mounted device and a display device mounted on a vehicle.

BACKGROUND ART

Conventionally, as the vehicle-mounted device described above, there has been proposed a display device shown inFIG. 10(see Patent Literature 1, for example). As shown in the drawing, a display device100includes: a concave mirror102(rotary body) which is rotatable about a rotary shaft101; a metal-made stay103(support body) which supports the concave mirror102; and a housing (not shown in the drawing) which houses the concave mirror102; the stay103and the like.

The concave mirror102reflects a display light emitted from a display unit not shown in the drawing. The stay103includes: a base portion103A; and a pair of raised wall portions103B which is mounted on the base portion103A in a raised manner and supports the rotary shaft101.

The above-mentioned display device100is mounted in the inside of an instrumental panel of a vehicle. Accordingly, when a vehicle causes a collision accident with a pedestrian, there is a possibility that the pedestrian collides with a portion of the vehicle in the vicinity of the display device100. In this case, even when the housing is broken, the stay103made of metal exists in the inside of the housing. Accordingly, there exists a drawback that an impact generated at the time of collision cannot be efficiently absorbed.

CITATION LIST

Patent Literature

Patent Literature 1: JP 2011-131651 A

SUMMARY OF INVENTION

Technical Problem

Accordingly, it is an object of the present invention to provide a vehicle-mounted device and a display device which can efficiently absorb an impact.

Solution to Problem

In order to solve the above-mentioned issue, an one aspect of the present invention is a vehicle-mounted device mounted on a vehicle, the vehicle-mounted device including: a rotary body which is rotatable about a rotary shaft; and a support body formed of a base portion and a pair of raised wall portions raised from the base portion and supporting the rotary shaft, wherein the pair of raised wall portions is formed into a shape which allows the raised wall portions to be deformable with a load applied in a raised direction.

A first preferred aspect of the present invention is the vehicle-mounted device according to the one aspect of the present invention, wherein distal end portions of the pair of raised wall portions are formed in an obliquely bent manner toward directions away from each other.

A second preferred aspect of the present invention is the vehicle-mounted device according to the one aspect or the first preferred aspect of the present invention, wherein end portions of the pair of raised wall portions on the base portion side are formed obliquely so as to be gradually away from each other in a direction toward the distal end portions of the pair of raised wall portions.

A third preferred aspect of the present invention is the vehicle-mounted device according to any one of the one aspect to the second preferred aspect of the present invention, wherein the raised wall portion is bent in a bellows shape.

Another aspect of the present invention is a vehicle-mounted device mounted on a vehicle, the vehicle-mounted device including: a rotary body; and a support body rotatably and pivotally supporting the rotary body, wherein an impact absorbing portion which moves the rotary body in an impact direction with respect to the support body in response to applying of an impact to the vehicle is provided to at least either one of the rotary body and the support body.

A first preferred aspect of the present invention is the vehicle-mounted device according to the another aspect of the present invention, wherein the rotary body includes a body portion and a shaft portion mounted on the body portion in a projecting manner, and the impact absorbing portion is a cut-out portion formed on the shaft portion.

A second preferred aspect of the present invention is the vehicle-mounted device according to the first preferred aspect of the present invention, wherein the support body includes a pair of raised plates which is disposed in a spaced-apart manner from each other and sandwiches the body portion in a projecting direction of the shaft portion, and the cut-out portion is formed on an intermediate portion between the body portion and the raised plate.

A third preferred aspect of the present invention is a display device including the vehicle-mounted device according to any one of the one aspect to the second preferred aspect of the present invention, wherein the rotary body is formed of a reflective member which reflects a display light.

Advantageous Effects of Invention

As has been described heretofore, according to the one aspect to the seventh preferred aspect of the present invention, the pair of raised wall portions is formed into a shape which allows the raised wall portions to be deformable with a load applied in a raised direction. With such a configuration, when an impact load is applied to the raised wall portions in the raised direction, the raised wall portions are deformed so that the impact can be efficiently absorbed.

According to the first preferred aspect of the present invention, the distal end portions of the pair of raised wall portions are formed in an obliquely bent manner toward directions away from each other. With such a configuration, the pair of raised wall portions easily falls down in the directions away from each other in response to applying of an impact load from the raised direction and hence, the impact can be efficiently absorbed.

According to the second preferred aspect of the present invention, the end portions of the pair of raised wall portions on a base portion side are formed obliquely so as to be gradually away from each other in a direction toward the distal end portions of the pair of raised wall portions. With such a configuration, the pair of raised wall portions easily falls down in the directions away from each other in response to applying of an impact load from the raised direction and hence, the impact can be efficiently absorbed.

According to the third preferred aspect of the present invention, the raised wall portion is bent in a bellows shape. With such a configuration, the raised wall portion is deformed in a shrinking manner in response to applying of an impact load from the raised direction and hence, the impact can be efficiently absorbed.

According to the fourth and seventh preferred aspect of the present invention, the impact absorbing portion is provided to at least either one of the rotary body and the support body, and the impact absorbing portion moves the rotary body in an impact direction with respect to the support body in response to applying of an impact to the vehicle. That is, when an impact load is applied to the vehicle, the impact can be absorbed by moving the rotary body in the impact direction. Accordingly, for example, even when a collision accident with a pedestrian occurs, the rotary body moves and hence, the impact load can be efficiently absorbed thus alleviating the impact load applied to the pedestrian.

According to the fifth preferred aspect of the present invention, the rotary body includes the body portion and the shaft portion projecting from the body portion, and the impact absorbing portion is a cut-out portion formed on the shaft portion. That is, by forming the cut-out portion on the shaft portion, the shaft portion is broken at the cut-out portion in response to applying of an impact to the vehicle and hence, the rotary body moves in the impact direction from the support body. With such a configuration, it is possible to realize the structure where the impact absorbing portion moves the rotary body in the impact direction with respect to the support body in response to applying of an impact to the vehicle with simple working of forming the cut-out portion on the shaft portion while maintaining strength necessary for supporting the rotary body.

According to the sixth preferred aspect of the present invention, the support body includes a pair of raised plates which is disposed in a spaced-apart manner from each other and sandwiches the body portion in a projecting direction of the shaft portion, and the cut-out portion is formed on an intermediate portion between the body portion and the raised plate. With such a configuration, it is possible to realize the structure where the impact absorbing portion surely moves the rotary body in the impact direction with respect to the support body in response to applying of an impact to the vehicle with simple working of forming the cut-out portion on the shaft portion while maintaining strength necessary for supporting the rotary body.

DESCRIPTION OF EMBODIMENTS

First Embodiment

Hereinafter, a display device which forms a vehicle-mounted device of the present invention according to a first embodiment is described with reference toFIG. 1andFIG. 2. The display device of the present invention forms a head-up display mounted on a vehicle where the head-up display reflects a display light emitted from a display unit such as a liquid crystal display not shown in the drawing and projects the display light to a windshield4thus allowing a user to visually recognize a virtual image.

As shown inFIG. 1, the display device1is housed in the inside of an instrumental panel2of the vehicle on a hood3side. As shown inFIG. 2, the display device1includes: a concave mirror12(a rotary body, a reflective member) which is rotatable about a rotary shaft11; a metal-made stay13(a support body) which supports the concave mirror12; a rotating mechanism part14which rotates the rotary shaft11; and a housing15(seeFIG. 1) which houses the concave mirror12, the stay13and the rotating mechanism part14.

The concave mirror12reflects a display light emitted from the display unit such as a liquid crystal display not shown in the drawing toward the windshield4. Then, the display light is reflected on the windshield4and reaches a viewpoint of a driver, and the driver visually recognizes the display light as an enlarged virtual image. The rotary shaft11is mounted on both sides of the concave mirror12in a horizontally projecting manner respectively. Since making the concave mirror12rotatable about the rotary shafts11, the driver can adjust a position of a virtual image to be visually recognized.

The stay13is formed by bending a sheet of elongated metal plate. As shown inFIG. 2, the stay13includes: a base portion131; and a pair of raised wall portions132which is mounted on the base portion131in a raised manner and supports the rotary shafts11. The base portion131is arranged horizontally.

Bent portions134which are bent at an approximately 90° are formed between the base portion131and the pair of raised wall portions132. With such a configuration, the pair of raised wall portions132is mounted on the horizontal base portion131in a raised manner in the vertical direction. A hole portion (not shown in the drawing) which allows the rotary shaft11to pass therethrough is formed in the raised wall portion132. By allowing the rotary shafts11to pass through the hole portions not shown in the drawing, the rotary shafts11are rotatably supported.

In a state where the rotary shafts11of the concave mirror12are supported by the stay13, a lower end of the concave mirror12is spaced apart from the base portion131. Further, the pair of raised wall portions132is formed into a shape which allows the raised wall portions to be deformable with a load applied from above in the vertical direction (raised direction). To be more specific, distal end portions133of the pair of raised wall portions132spaced apart from the base portion131are formed in an obliquely bent manner toward the directions away from each other. A bending angle θ is set to a value which falls within a range from 5° to 45° with respect to the vertical direction.

The rotating mechanism part14is formed of a motor and the like, and generates a driving force for rotating the rotary shafts11. The housing15is formed of a member having low rigidity such as a resin, for example, and is configured to be easily broken when an impact load F1is applied to the housing15.

Next, a case where an impact load F1is applied to the above-mentioned display device1from above is described. Firstly, prior to the description of the present invention is made, a case where an impact load F1is applied to a conventional display device100shown inFIG. 10from above is described. In the conventional display device100, raised wall portions103B are mounted on a base portion103A in a state where the raised wall portion103B stands upright in the vertical direction from an end portion on a base portion103A side to a distal end portion thereof. Accordingly, even when an impact load F1along the vertical direction (raised direction) is applied to the raised wall portion103B, the raised wall portions103B are minimally deformed thus impeding the absorption of an impact.

To the contrary, in the display device1according to the present invention shown inFIG. 1, the distal end portion133of the raised wall portion132is formed in an obliquely bent manner. With such a configuration, when an impact load F1along the vertical direction is applied to the raised wall portions132, a component force F2which expands the distal end portion133of the raised wall portion132by pushing is generated. Accordingly, as indicated by a chain line in the drawing, the bent portions134are deformed such that the pair of raised wall portions132falls in the directions away from each other and hence, an impact can be efficiently absorbed.

Second Embodiment

Next, a second embodiment of the present invention is described. A point which makes the second embodiment different from the first embodiment lies in a shape of a raised wall portion132. In the first embodiment, the bent portions134formed between the base portion131and the pair of raised wall portions132are bent at 90°. However, in the second embodiment, bent portions134are bent at an angle larger than 90°. With such a configuration, end portions135of a pair of raised wall portions132on a base portion131side are formed obliquely such that the end portions135are gradually away from each other as the raised wall portions132extend toward distal end portions133respectively. Further, by bending portions of the end portions135on a distal end portion133side in the direction that the portions approach each other, a portion of the raised wall portion132between the end portion135and the distal end portion133is arranged to extend along the vertical direction.

Also in this case, in the same manner as the case of the first embodiment, when an impact load F1along the vertical direction is applied to the raised wall portion132, a component force F2which expands the distal end portion133of the raised wall portion132by pushing is generated. Accordingly, as indicated by a chain line in the drawing, the bent portions134are deformed such that the pair of raised wall portions132falls in the directions away from each other. Further, the end portions135of the pair of raised wall portions132on a base portion131side are formed in an obliquely bent manner in the directions away from each other and hence, the pair of raised wall portions132more easily falls in the directions away from each other and hence, an impact can be absorbed more efficiently.

In the above-mentioned second embodiment, both the distal end portion133and the end portion135are formed obliquely. However, the present invention is not limited to such a configuration. It may be adopted a configuration where only the end portion135is formed obliquely, and the distal end portion133is provided so as to stand straight up along the vertical direction in the same manner as the conventional configuration. Also in this case, the pair of raised wall portions132easily falls down in the directions away from each other due to an impact load F1and hence, the impact can be absorbed.

Third Embodiment

Next, a third embodiment of the present invention is described. A point which makes the third embodiment different from the first embodiment lies in that, in each one of a pair of raised wall portions132, a portion between a distal end portion133and an end portion135is formed in a bellows shape. With such a configuration, even when the pair of raised wall portions132does not fall in directions away from each other at the time of applying of an impact load F1, as indicated by a chain line, the raised wall portions132are easily deformed in a shrinking manner in a vertical direction and hence, an impact can be efficiently absorbed.

In the above-mentioned third embodiment, both the distal end portions133and the end portions135are formed obliquely such that the distal end portions133and the end portions135are respectively gradually away from each other as the raised wall portions132extend toward distal ends thereof respectively. However, the present invention is not limited to such a configuration. It is sufficient that the raised wall portion132is formed in a bellows shape. The distal end portions133and the end portions135may be formed so as to extend upright along the vertical direction, or may be formed obliquely so as to approach each other as the raised wall portions132extend toward distal ends thereof respectively.

In the above-mentioned first to third embodiments, the description is made with respect to the case where the concave mirror12is used as the rotary body, for example. However, the present invention is not limited to such a case. The display unit per se may be used as the rotary body, or another electronic equipment may be used as the rotary body.

In the above-mentioned embodiments, the base portion131of the stay13is arranged horizontally and the raised wall portions132are arranged vertically. However, the arrangement of these portions is not limited to such an arrangement.

Fourth Embodiment

Next, fourth embodiment of the present invention is described with reference toFIG. 5toFIG. 8. A display device1according to the fourth embodiment forms a head-up display device mounted on a vehicle, wherein a display light emitted from a display unit such as a liquid crystal display not shown in the drawing is reflected on a windshield4and is transmitted to a viewpoint of a driver thus allowing the user to visually recognize the display light as an enlarged virtual image.

As shown inFIG. 5, the display device1is housed in an instrumental panel2of a vehicle on a hood3side. As also shown inFIG. 6, the display device1includes: a display body5(rotary body); a support body6which pivotally and rotatably supports the display body5; a rotating mechanism part8which rotates the display body5; and a housing9(shown inFIG. 5) which houses the display body5, the support body6, and the rotating mechanism part8therein. In this embodiment, impact absorbing portions7which move the display body5in an impact direction with respect to the support body6is provided to the display body5.

An advancing direction of the vehicle shown inFIG. 5is indicated by an arrow Z, a vehicle width direction is indicated by a direction (an arrow X direction inFIG. 6) orthogonal to a paper surface direction inFIG. 5, and a direction orthogonal to both the arrow Z direction and the arrow X direction is indicated by an arrow Y direction. Further, in this specification, there may be a case where the arrow Z direction is referred to as a longitudinal direction, the arrow X direction is referred to as a lateral direction, and the arrow Y direction is referred to as a vertical direction. An arrow Z-X direction indicates a horizontal direction.

As shown inFIG. 6, the display body5includes: a concave mirror51(body portion) which reflects a display light emitted from a display unit such as a liquid crystal display not shown in the drawing toward a windshield4; and a pair of shaft portions52which is mounted on both sides of the concave mirror51in the lateral direction (in the arrow X direction). In the display body5, a position of a virtual image which a driver visually recognizes is adjusted by rotating the concave mirror51about the respective shaft portions52. Each shaft portion52is configured to have a length which enables the shaft portion52to penetrate a raised plate62of the support body6. In a state where the display body5is pivotally supported on the support body6, a cut-out portion7(impact absorbing portion) is formed on intermediate portions of the shaft portions52between the concave mirror51and the pair of respective raised plates62of the support body6by cutting away portions of the shaft portions52in a wedge shape. The cut-out portion7is formed only on a lower side (on a side where the base plate61of the support body6exists) of the shaft portion52. In this manner, by forming the cut-out portion7on the shaft portion52, when a vehicle causes a collision accident with a pedestrian, for example, the shaft portion52is broken at the cut-out portion7due to an impact from a hood3side and hence, the concave mirror51(display body5) is moved toward an impact direction side from the support body6.

As shown also inFIG. 7, the support body6is formed by applying bending to one sheet of elongated metal plate, and includes: a base plate61, and a pair of raised plates62which is formed by bending at predetermined positions of the base plate61. The pair of raised plates62is arranged to face each other in an opposed manner. A distance between the pair of raised plates62in an opposedly facing direction (in an arrow X direction) is set larger than a size of the concave mirror51in the arrow X direction.

As shown inFIG. 7, a circular shaft hole6awhich allows the shaft portion52of the display body5to pass therethrough is formed in the raised plate62. The shaft hole6ais formed at a position away from a lower end of the raised plate62by a predetermined distance such that a lower end of the concave mirror51is positioned in a spaced-apart manner from the base plate61. By making the shaft portions52of the display body5pass through the shaft holes6a, the concave mirror51is rotatably supported on the support body6in a state where the lower end of the concave mirror51is spaced apart from the base plate61.

As shown inFIG. 5, the housing9is made of a synthetic resin which is easily damaged when an impact is applied. An opening portion (not shown in the drawing) through which a display light is radiated toward a front glass is formed in the housing9at a position where the housing9faces the windshield4in an opposed manner. The opening portion is closed by a light transmissive cover.

Next, the manner of operation of the display device1having the above-mentioned configuration when an impact load F1in an impact direction (for example, an impact load generated by a collision accident with a pedestrian) is applied to the display device1is described with reference toFIG. 8. In the display device1of the present invention shown inFIG. 5, for example, when a vehicle causes a collision accident with a pedestrian, an impact load F1is applied to a portion of the vehicle in the vicinity of the display device1due to an impact from a hood3side, the housing9is broken and the impact load F1is applied to the shaft portions52of the display body5. As a result, the shaft portions52are broken at cut-out portions7so that a concave mirror51moves in an impact direction from the support body6. That is, when the impact load F1is applied to the vehicle, the display body5is moved in the impact direction so that an impact is absorbed. Accordingly, for example, even when a vehicle causes a collision accident with a pedestrian, the concave mirror51is moved and hence, the impact load F1can be efficiently absorbed thus alleviating the impact load F1applied to the pedestrian.

In the above-mentioned embodiment, the cut-out portion7which forms the impact absorbing portion7is formed on a lower side of the shaft portion52. However, the present invention is not limited to such a configuration. The cut-out portion7may be formed over the whole circumference of the shaft portion52. In the above-mentioned embodiment, the cut-out portion7is used as the impact absorbing portion7. However, the present invention is not limited to such a configuration. The impact absorbing portion7may be formed such that a diameter size of the impact absorbing portion7is set smaller than diameter sizes of portions of the shaft portion52other than the impact absorbing portion7. That is, the shaft portion52may be formed such that the rigidity of a portion of the shaft portion52(the impact absorbing portion) becomes lower than the rigidity of other portions of the shaft portion52so as to enable the movement of the display body5in an impact direction with respect to the support body6when an impact is applied to the vehicle.

In the above-mentioned embodiments, the impact absorbing portion7is formed on the display body5. However, the present invention is not limited to such a configuration. The impact absorbing portion7may be formed on the pair of raised plates62of the support body6. In this case, as shown inFIG. 9, a shaft hole6a′ which forms an impact absorbing portion may be formed into a gourd shape (an elliptical shape with a center portion narrowed similar to a shape of a gourd). Further, in the above-mentioned embodiment, the shaft hole6a,6a′ is formed in the raised plate62in a penetrating manner. However, the present invention is not limited to such a configuration. The shaft hole6a,6a′ may be formed of a recessed portion formed on the raised plate62. That is, the shaft hole6a,6a′ may be formed such that the rigidity of a portion (an impact absorbing portion) of the shaft hole6a,6a′ is set lower than the rigidity of other portions of the shaft hole6a,6a′ so as to enable the movement of the display body5in an impact direction with respect to the support body6when an impact is applied to the vehicle.

In the above-mentioned fifth embodiment, the description is made with respect to the case where the concave mirror51is exemplified as the body portion. However, the present invention is not limited to such a case. A display unit per se may be used as the body portion, or another electronic equipment may be used as the body portion.

In the above-mentioned embodiments, the description is made with respect to the case where the impact direction is a direction that an impact is applied from a hood3side. However, the present invention is not limited to such a case. It is sufficient that the impact direction is a direction which intersects with a projecting direction (arrow X direction) of the shaft portion52of the support body6.

The above-mentioned embodiments merely describe the typical configurations of the present invention, and the present invention is not limited to the above-mentioned embodiments. That is, various modifications can be carried out without departing from the gist of the present invention.

REFERENCE SIGNS LIST