Reflector structure and saddle type vehicle

Abstract

[Problem] To improve radar wave reflection performance using a small amount of space. [Solution] A reflector structure 7 is arranged in the front of a saddle-type vehicle 1 so as to reflect radar waves. The reflector structure 7 comprises a plurality of reflectors 31, 32, each having three reflective surfaces 35, 38 perpendicular to one another. All of the plurality of reflectors 31, 32 are open toward the front of the saddle-type vehicle 1 or toward an inclined forward direction with respect to the saddle-type vehicle 1.

Description

Technical Field

[0001] The present invention relates to a reflector structure and a saddle-ride type vehicle including the reflector structure. Background Art

[0002] In recent years, efforts to consider vulnerable groups among traffic participants and provide them with pathways to sustainable transportation systems have been increasing. To this end, research and development efforts to further improve traffic safety and convenience through developments related to preventive safety technologies are attracting attention. In particular, developments related to saddle-type vehicles that incorporate reflector structures that reflect radar waves emitted from surrounding vehicles have attracted significant attention as preventive safety technologies.

[0003] For example, Patent Document 1 discloses a saddle-ride type vehicle provided with a reflector structure composed of a plurality of reflectors each including three reflecting surfaces perpendicular to each other.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent No. 6669223 Summary of the Invention

[0007] The task to be accomplished by the present invention

[0008] The reflector structure of Patent Document 1 includes a reflector (hereinafter referred to as a "retroreflector") that opens toward the rear of the saddle-ride type vehicle (see Patent Document 1). Figure 2 When such a reflector structure is placed in the front of a saddle-ride vehicle, radar waves incident on the retroreflector are blocked by components arranged behind the retroreflector, and the retroreflector cannot reflect the radar waves over a wide area. Therefore, even if the reflector structure occupies a large space, it cannot achieve radar wave reflection performance corresponding to such a large space.

[0009] In view of the above background, an object of the present invention is to provide a reflector structure capable of improving radar wave reflection performance in a compact space and a saddle-ride type vehicle including the reflector structure. Therefore, the present invention aims to contribute to the development of a sustainable transportation system.

[0010] Means of completing the task

[0011] To achieve such an object, one aspect of the present invention provides a reflector structure (7, 43, 63), which is arranged in the front of a saddle-type vehicle (1, 41, 61) to reflect radar waves, and the reflector structure includes a plurality of reflectors (31, 32, 51-53, 71-74), and the plurality of reflectors include three reflecting surfaces (35, 38, 55-57, 81-84) perpendicular to each other, wherein the plurality of reflectors are all opened or obliquely opened toward the front of the saddle-type vehicle.

[0012] According to this aspect, radar waves incident on the multiple reflectors are prevented from being blocked by components arranged behind the reflectors. Therefore, all reflectors can reflect the radar waves over a wide area. This improves radar wave reflection performance while occupying a smaller space. This will contribute to the development of sustainable transportation systems.

[0013] In the above aspect, preferably, the multiple reflectors include: a left reflector (31, 51), which is arranged to the left side of the transverse center line (X) of the saddle-ride type vehicle and is obliquely opened toward the left front of the saddle-ride type vehicle; and a right reflector (32, 52), which is arranged to the right side of the transverse center line of the saddle-ride type vehicle and is obliquely opened toward the right front of the saddle-ride type vehicle.

[0014] According to this aspect, radar waves obliquely incident from the left and right front parts of the saddle-ride type vehicle can be reflected over a wide range, which further improves the reflection performance of radar waves.

[0015] In the above aspect, preferably, the left reflector (31) and the right reflector (32) are integrally provided.

[0016] According to this aspect, the reflector structure can be miniaturized, which allows the space occupied by the reflector structure to be further reduced.

[0017] In the above aspect, preferably, the left reflector (51) and the right reflector (52) are spaced apart from each other.

[0018] According to this aspect, the installation directions of the left reflector and the right reflector can be freely set.

[0019] In the above aspect, preferably, the plurality of reflectors further include a central reflector (53) that is arranged between the left reflector and the right reflector and opens toward the front of the saddle-ride type vehicle.

[0020] According to this aspect, not only radar waves incident obliquely from the left and right front parts of the saddle-ride type vehicle but also radar waves incident from the front part of the saddle-ride type vehicle can be reflected over a wide range, which further improves the radar wave reflection performance.

[0021] In the above aspect, preferably, each of the plurality of reflectors includes a focusing point (C1 to C3) of the three reflecting surfaces, and the focusing point of the central reflector is shifted forward relative to the focusing points of the left and right reflectors.

[0022] According to this aspect, the central reflector, the left reflector, and the right reflector can be installed in a small space while suppressing interference among the central reflector, the left reflector, and the right reflector.

[0023] In the above aspect, preferably, the multiple reflectors include: a first left reflector (71), which is arranged to the left side of the transverse centerline of the saddle-ride type vehicle and opens toward the front of the saddle-ride type vehicle; a second left reflector (72), which is arranged behind the first left reflector and opens obliquely toward the left front of the saddle-ride type vehicle; a first right reflector (73), which is arranged to the right side of the transverse centerline of the saddle-ride type vehicle and opens toward the front of the saddle-ride type vehicle; and a second right reflector (74), which is arranged behind the first right reflector and opens obliquely toward the right front of the saddle-ride type vehicle.

[0024] According to this aspect, radar waves incident from the front, obliquely incident from the left front, and obliquely incident from the right front of the saddle-ride type vehicle can be reflected over a wide range, which further improves the radar wave reflection performance.

[0025] In the above aspect, preferably, each of the multiple reflectors includes a gathering point (E1~E4) of the three reflecting surfaces, and the gathering point of the second left reflector is shifted to the left relative to the gathering point of the first left reflector, and the gathering point of the second right reflector is shifted to the right relative to the gathering point of the first right reflector.

[0026] According to this aspect, the first left reflector and the second left reflector can be installed in a smaller space while suppressing interference between the first left reflector and the second left reflector. In addition, the first right reflector and the second right reflector can be installed in a smaller space while suppressing interference between the first right reflector and the second right reflector.

[0027] In the above aspect, preferably, the plurality of reflectors are arranged at the same height.

[0028] According to this aspect, the reflection performance of radar waves can be improved particularly at a predetermined height, thereby making it easier for surrounding vehicles to recognize the saddle-riding type vehicle.

[0029] In the above aspect, preferably, the plurality of reflectors are arranged symmetrically with respect to a transverse center line of the saddle-ride type vehicle.

[0030] According to this aspect, the radar wave incident from the left front portion of the saddle-ride type vehicle and the radar wave incident from the right front portion of the saddle-ride type vehicle can be reflected in a balanced manner.

[0031] In the above aspect, preferably, in a plan view, an angle between central axes ( B1 - B2 , D1 - D3 , F1 - F4 ) of the plurality of reflectors and a front-rear direction of the saddle-ride type vehicle is within 45 degrees.

[0032] According to this aspect, the radar waves emitted from the oncoming vehicle can be effectively reflected by the plurality of reflectors, which increases the possibility that the oncoming vehicle can recognize the saddle-riding type vehicle.

[0033] In the above aspect, preferably, central axes of the plurality of reflectors extend horizontally.

[0034] According to this aspect, the radar waves horizontally emitted from the surrounding vehicles can be effectively reflected by the plurality of reflectors, which increases the possibility that the surrounding vehicles can recognize the saddle-ride type vehicle.

[0035] One aspect of the present invention is a saddle-ride type vehicle (1, 41), comprising a reflector structure (7, 43), the saddle-ride type vehicle comprising: a vehicle body frame (3); a vehicle body cover (6), the vehicle body cover covering the vehicle body frame; a headlight (25), the headlight being arranged on the front surface of the vehicle body cover; and a windshield (26), the windshield being arranged higher than the headlight and attached to the front surface of the vehicle body cover, wherein the reflector structure is arranged higher than the headlight and a front portion of the reflector structure is covered by the windshield.

[0036] According to this aspect, the reflector structure can be arranged at a position that does not obstruct the rider's field of view. In addition, since the reflector structure is covered by the windshield, it is possible to suppress deterioration of the appearance caused by installing the reflector structure.

[0037] One aspect of the present invention is a saddle-riding vehicle (61), which includes a reflector structure (63), and the saddle-riding vehicle includes: a body frame (3); a body cover (6), which covers the body frame; a headlight (25), which is arranged on the front surface of the body cover; and a front fender (17), which is arranged at the front lower part of the body frame and covers the upper part of the front wheel (16), wherein the reflector structure is arranged on the left and right sides of the body cover, higher than the front fender, and lower than the upper end of the headlight.

[0038] According to this aspect, the reflector structure can be arranged at a position that does not obstruct the rider's field of view. In addition, because the reflector structure is arranged higher than the front fender, interference between the front fender and the reflector structure can be prevented when the front fender shifts relative to the reflector structure in response to the turning of the front wheel.

[0039] Effects of the Invention

[0040] Therefore, according to the above aspect, it is possible to provide a reflector structure capable of improving the reflection performance of radar waves in a small space, and a saddle-ride type vehicle including the reflector structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] [ Figure 1 ] A perspective view showing a motorcycle according to a first embodiment of the present invention

[0042] [ Figure 2 ] A perspective view showing the front portion of a motorcycle according to a first embodiment of the present invention

[0043] [ Figure 3 ] A plan view showing the front portion of a motorcycle according to a first embodiment of the present invention

[0044] [ Figure 4 ] A perspective view showing a reflector structure according to a first embodiment of the present invention

[0045] [ Figure 5 ] A plan view showing a reflector structure according to a first embodiment of the present invention

[0046] [ Figure 6 ] Graph showing experimental results of measuring the horizontal RCS characteristics of a reflector

[0047] [ Figure 7 ] A perspective view showing the front portion of a motorcycle according to a second embodiment of the present invention

[0048] [ Figure 8 ] A perspective view showing a reflector structure according to a second embodiment of the present invention

[0049] [ Figure 9 ] A plan view showing a reflector structure according to a second embodiment of the present invention

[0050] [ Figure 10 ] A front view showing the front portion of a motorcycle according to a third embodiment of the present invention

[0051] [ Figure 11 ] A plan view showing a reflector structure according to a third embodiment of the present invention

[0052] [ Figure 12 ] A perspective view showing a reflector structure according to another embodiment of the present invention DETAILED DESCRIPTION

[0053] (First embodiment)

[0054] Below, refer to Figures 1 to 6 A motorcycle 1 (an example of a saddle-ride type vehicle) according to a first embodiment of the present invention will be described. Hereinafter, terms indicating directions, such as front, rear, up, down, left, and right, will be used based on the direction as seen from the perspective of a rider of the motorcycle 1. Arrows Fr, appropriately indicated in each figure, indicate the front of the motorcycle 1. A single-dot chain line X, appropriately appended to each figure, indicates the transverse centerline of the motorcycle 1 in plan view (hereinafter referred to as "transverse centerline X").

[0055] <Motorized two-wheeled vehicle 1>

[0056] refer to Figure 1 The two-wheeled motor vehicle 1 is a scooter type. The two-wheeled motor vehicle 1 is mainly composed of a body frame 3 ( Figure 1 The vehicle body frame 3 is a vehicle body frame having a steering device 4 supported by the front portion thereof, a swingable power unit 5 supported by the rear portion thereof, a vehicle body cover 6 covering the vehicle body frame 3, and a reflector structure 7 provided on the front surface of the vehicle body cover 6.

[0057] <Body frame 3>

[0058] The vehicle body frame 3 includes a head pipe 11, a main frame 12 extending rearward and downward from the head pipe 11, and a seat rail (not shown) connected to the rear end of the main frame 12. A rider seat 13 is supported by the seat rail.

[0059] <Steering device 4>

[0060] The steering system 4 includes left and right front forks 14 and handlebars 15 fixed to the upper ends of the left and right front forks 14. The left and right front forks 14 are supported by the head pipe 11 of the vehicle body frame 3 so as to be able to swing left and right. Front wheels 16 are mounted to the lower ends of the left and right front forks 14. Front fenders 17 are mounted to the left and right front forks 14 so as to cover the upper portions of the front wheels 16. The front fenders 17 are arranged at the front lower portion of the vehicle body frame 3.

[0061] <Power Unit 5>

[0062] The power unit 5 is supported by the rear portion of the main frame 12 of the vehicle body frame 3 so as to be able to swing freely up and down. A rear wheel 19 is mounted on the rear end of the power unit 5. The power unit 5 includes an internal combustion engine and a transmission that transmits the driving force of the internal combustion engine to the rear wheel 19. The power unit 5 may include an electric motor instead of the internal combustion engine.

[0063] <Body cover 6>

[0064] The vehicle body cover 6 includes a front cover 21 that covers the front portion of the vehicle body frame 3 , a rear cover 22 that covers the rear portion of the vehicle body frame 3 , and a lower cover 23 that connects the front cover 21 and the rear cover 22 .

[0065] refer to Figure 2 and Figure 3 , the headlight 25 is arranged on the front surface of the front cover 21. A windshield 26 ( Figure 2 The windshield 26 is arranged higher than the headlights 25. The windshield 26 is made of a transparent resin. A recess 27 is provided on the front surface of the front cover 21. The recess 27 is arranged higher than the headlights 25.

[0066] <Reflector Structure 7>

[0067] refer to Figure 1 The reflector structure 7 is arranged in the front portion of the motorcycle 1 to reflect millimeter waves (an example of radar waves) emitted from surrounding vehicles. The reflector structure 7 is mounted to the front cover 21 or the vehicle body frame 3 via a bracket (not shown). In other words, the reflector structure 7 is mounted to a component other than the steering device 4. This prevents the reflector structure 7 from shifting in response to the steering of the front wheel 16.

[0068] refer to Figure 2 and Figure 3 The reflector structure 7 is arranged higher than and behind the headlight 25. The reflector structure 7 is accommodated in a recess 27 provided on the front surface of the front cover 21. The front of the reflector structure 7 is covered by the lower portion of the windshield 26.

[0069] The reflector structure 7 includes a plurality of reflectors 31 and 32. Each of the plurality of reflectors 31 and 32 is made of a corner cube reflector that reflects electromagnetic waves back toward their incident direction by retroreflection. The plurality of reflectors 31 and 32 are made of metal. In another embodiment, the plurality of reflectors 31 and 32 can be made of a resin material and a metal film covering the resin material.

[0070] The plurality of reflectors 31 and 32 include a left reflector 31 and a right reflector 32. The left reflector 31 is arranged on the left side of the transverse centerline X and is obliquely opened toward the left front of the motorcycle 1. The right reflector 32 is arranged on the right side of the transverse centerline X and is obliquely opened toward the right front of the motorcycle 1. In other words, all of the plurality of reflectors 31 and 32 are obliquely opened toward the front of the motorcycle 1.

[0071] The left reflector 31 and the right reflector 32 are arranged symmetrically with respect to the transverse center line X. The left reflector 31 and the right reflector 32 are arranged at the same height. The left reflector 31 and the right reflector 32 have the same shape. The left reflector 31 and the right reflector 32 are provided integrally.

[0072] refer to Figure 4 and Figure 5 The left reflector 31 includes three left reflective plates 34. The three left reflective plates 34 are flat and arranged perpendicular to each other. A left reflective surface 35 is formed on the inner surface of each of the three left reflective plates 34. In other words, the left reflector 31 includes three left reflective surfaces 35. The three left reflective surfaces 35 are arranged perpendicular to each other and converge at a convergence point A1. Each of the left reflective surfaces 35 is formed in a pentagonal shape.

[0073] The central axis B1 of the left reflector 31 extends horizontally and obliquely from the focusing point A1 toward the left front. The central axis B1 of the left reflector 31 is a set of points whose shortest distances to the three left reflective surfaces 35 are equal. The angles between the central axis B1 of the left reflector 31 and the three left reflective surfaces 35 are all equal. When viewed from above, the angle θ1 between the central axis B1 of the left reflector 31 and the front-to-back direction of the motorcycle 1 is within 45 degrees. When viewed from the direction of the central axis B1, the reflection area of the left reflector 31 (the area formed by the three left reflective surfaces 35) is formed into a regular hexagon.

[0074] The right reflector 32 includes three right reflective plates 37. The three right reflective plates 37 are flat and arranged perpendicular to each other. A right reflective surface 38 is formed on the inner surface of each of the three right reflective plates 37. In other words, the right reflector 32 includes three right reflective surfaces 38. The three right reflective surfaces 38 are arranged perpendicular to each other and converge at a convergence point A2. Each of the right reflective surfaces 38 is formed in a pentagonal shape.

[0075] The central axis B2 of the right reflector 32 extends horizontally and obliquely from the gathering point A2 toward the right front. The central axis B2 of the right reflector 32 is a collection of points whose shortest distances to the three right reflective surfaces 38 are equal. The angles between the central axis B2 of the right reflector 32 and the three right reflective surfaces 38 are all equal. When viewed from above, the angle θ2 between the central axis B2 of the right reflector 32 and the front-to-back direction of the motorcycle 1 is within 45 degrees. When viewed from the direction of the central axis B2, the reflection area of the right reflector 32 (the area formed by the three right reflective surfaces 38) forms a regular hexagon.

[0076] The outer surface of one of the left reflective plates 34 of the left reflector 31 and the outer surface of one of the right reflective plates 37 of the right reflector 32 are joined and fixed to each other. According to this, the left reflector 31 and the right reflector 32 are integrated.

[0077] <Experiment>

[0078] An experiment was conducted on a reflector having the same shape as the multiple reflectors 31 and 32 (hereinafter referred to as "the reflector according to the present embodiment") to measure the horizontal radar cross-section characteristics (RCS characteristics) in an anechoic chamber for millimeter waves. In this experiment, while the reflector according to the present embodiment rotates in the horizontal direction, millimeter waves are emitted from a horn antenna to the reflector according to the present embodiment, and the millimeter waves reflected by the reflector according to the present embodiment are received by the horn antenna. In addition, the millimeter waves received by the horn antenna are analyzed using a network analyzer to calculate the horizontal RCS characteristics of the reflector according to the present embodiment. The results of this experiment are shown in FIG. Figure 6 shown.

[0079] like Figure 6 As shown, the reflector according to the present embodiment has a relatively high RCS characteristic within any lateral range of approximately 40 degrees from 0 degrees. Therefore, it is proven that the multiple reflectors 31 and 32 can effectively reflect millimeter waves emitted from surrounding vehicles within any lateral range of approximately 40 degrees from the central axes B1 and B2.

[0080] <Effects of the First Embodiment>

[0081] refer to Figure 3 The central axis B1 of the left reflector 31 extends horizontally and obliquely from the focusing point A1 toward the left front. As described above, the left reflector 31 can effectively reflect millimeter waves emitted from surrounding vehicles within a lateral range of approximately 40 degrees from the central axis B1. Accordingly, the left reflector 31 can effectively reflect millimeter waves emitted from surrounding vehicles within a range of approximately 80 degrees to the left front of the motorcycle 1.

[0082] The central axis B2 of the right reflector 32 extends horizontally and obliquely from the focusing point A2 toward the right front. As described above, the right reflector 32 can effectively reflect millimeter waves emitted from surrounding vehicles within any lateral range of approximately 40 degrees from the central axis B2. Accordingly, the right reflector 32 can effectively reflect millimeter waves emitted from surrounding vehicles within a range of approximately 80 degrees to the right front of the motorcycle 1.

[0083] Therefore, the reflector structure 7 can effectively reflect the millimeter waves emitted by surrounding vehicles within a range of approximately 80 degrees each to the left and right front of the motorcycle 1 (i.e., a large range of approximately 160 degrees in total). This can increase the possibility of surrounding vehicles recognizing the motorcycle 1.

[0084] (Second embodiment)

[0085] Below, refer to Figures 7 to 9 A motorcycle 41 (an example of a saddle-type vehicle) according to a second embodiment of the present invention will be described. Descriptions that overlap with those in the first embodiment will be omitted. Components other than the reflector structure 43 of the motorcycle 41 according to the second embodiment are the same as those in the first embodiment, and therefore descriptions thereof will be omitted.

[0086] <Reflector Structure 43>

[0087] The reflector structure 43 includes a plurality of reflectors 51-53. The plurality of reflectors 51-53 include a left reflector 51, a right reflector 52, and a central reflector 53. The left reflector 51 is arranged to the left of the transverse centerline X and is obliquely opened toward the left front portion of the motorcycle 41. The right reflector 52 is arranged to the right of the transverse centerline X and is obliquely opened toward the right front portion of the motorcycle 41. The central reflector 53 is arranged between the left reflector 51 and the right reflector 52 on the transverse centerline X and is opened toward the front of the motorcycle 41. In other words, all of the plurality of reflectors 51-53 are opened or obliquely opened toward the front of the motorcycle 41.

[0088] The plurality of reflectors 51 to 53 are spaced apart from each other. The reflectors 51 to 53 are arranged at the same height. The reflectors 51 to 53 have the same shape. The left reflector 51 and the right reflector 52 are arranged symmetrically with respect to the transverse center line X.

[0089] The left reflector 51 includes three left reflective surfaces 55. The three left reflective surfaces 55 are arranged perpendicular to each other and converge at a convergence point C1. The central axis D1 of the left reflector 51 extends horizontally and obliquely from the convergence point C1 toward the left front. An angle θ3 between the central axis D1 of the left reflector 51 and the front-to-rear direction of the motorcycle 41 is within 45 degrees (e.g., 40 degrees).

[0090] The right reflector 52 includes three right reflective surfaces 56. The three right reflective surfaces 56 are arranged perpendicular to each other and converge at a convergence point C2. The central axis D2 of the right reflector 52 extends horizontally and obliquely from the convergence point C2 toward the right front. An angle θ4 between the central axis D2 of the right reflector 52 and the front-to-rear direction of the motorcycle 41 is within 45 degrees (e.g., 40 degrees).

[0091] The central reflector 53 is arranged in a reversed position relative to the left reflector 51 and the right reflector 52. The central reflector 53 includes three central reflective surfaces 57. The three central reflective surfaces 57 are arranged perpendicular to each other and converge at a convergence point C3. The convergence point C3 of the central reflector 53 is shifted forward relative to the convergence points C1 and C2 of the left reflector 51 and the right reflector 52. The central axis D3 of the central reflector 53 extends horizontally from the convergence point C3 along the front-to-back direction of the motorcycle 41. In other words, the angle between the central axis D3 of the central reflector 53 and the front-to-back direction of the motorcycle 41 is 0 degrees. When viewed from above, the central axis D3 of the central reflector 53 coincides with the transverse centerline X.

[0092] <Effects of the Second Embodiment>

[0093] The plurality of reflectors 51 to 53 include a left reflector 51, a right reflector 52, and a central reflector 53 that opens toward the front of the motorcycle 41. Thus, not only millimeter waves obliquely incident from the left and right front portions of the motorcycle 41 but also millimeter waves incident from the front portion of the motorcycle 41 can be reflected over a wide range.

[0094] (Third embodiment)

[0095] Below, refer to Figure 10 and Figure 11 Next, a motorcycle 61 (an example of a saddle-riding type vehicle) according to a third embodiment of the present invention will be described. Descriptions that overlap with those in the first embodiment will be omitted. Since components of the motorcycle 61 according to the third embodiment, excluding the reflector structure 63, are similar to those in the first embodiment, descriptions thereof will be omitted.

[0096] <Reflector Structure 63>

[0097] The reflector structure 63 is arranged higher than the front fender 17. The height of the reflector structure 63 matches the height of the lower portion of the headlight 25. The reflector structure 63 is arranged lower than the upper end of the headlight 25.

[0098] The reflector structure 63 includes a plurality of reflectors 71 to 74. The plurality of reflectors 71 to 74 include a first left reflector 71, a second left reflector 72, a first right reflector 73, and a second right reflector 74. The first left reflector 71 is arranged to the left of the transverse centerline X and is open toward the front of the motorcycle 61. The second left reflector 72 is arranged behind the first left reflector 71 and is obliquely open toward the left front of the motorcycle 61. The first right reflector 73 is arranged to the right of the transverse centerline X and is open toward the front of the motorcycle 61. The second right reflector 74 is arranged behind the first right reflector 73 and is obliquely open toward the right front of the motorcycle 61. In other words, all of the plurality of reflectors 71 to 74 are open or obliquely open toward the front of the motorcycle 61.

[0099] The plurality of reflectors 71-74 are spaced apart from one another. The reflectors 71-74 are arranged at the same height. The reflectors 71-74 have the same shape. The first left reflector 71 and the first right reflector 73 are arranged symmetrically with respect to the transverse centerline X, and the second left reflector 72 and the second right reflector 74 are arranged symmetrically with respect to the transverse centerline X.

[0100] The first left reflector 71 and the second left reflector 72 are housed in a left recess 76 provided on the left side of the front cover 21. The first right reflector 73 and the second right reflector 74 are housed in a right recess 77 provided on the right side of the front cover 21. In other words, the reflector structure 63 is provided on both the left and right sides of the front cover 21. The reflector structure 63 may be exposed to the outside or may be covered by a resin member (not shown).

[0101] The first left reflector 71 includes three first left reflective surfaces 81. The three first left reflective surfaces 81 are arranged perpendicular to each other and converge at a convergence point E1. The central axis F1 of the first left reflector 71 extends horizontally from the convergence point E1 along the front-to-rear direction of the motorcycle 61. In other words, the angle between the central axis F1 of the first left reflector 71 and the front-to-rear direction of the motorcycle 61 is 0 degrees.

[0102] The second left reflector 72 is arranged in a reverse position relative to the first left reflector 71. The second left reflector 72 includes three second left reflective surfaces 82. The three second left reflective surfaces 82 are arranged perpendicular to each other and converge at a convergence point E2. The convergence point E2 of the second left reflector 72 is shifted to the left relative to the convergence point E1 of the first left reflector 71. The central axis F2 of the second left reflector 72 extends horizontally and obliquely toward the left front from the convergence point E2. The angle θ5 between the central axis F2 of the second left reflector 72 and the front-to-rear direction of the motorcycle 61 is set to within 45 degrees (for example, 40 degrees).

[0103] The first right reflector 73 includes three first right reflective surfaces 83. The three first right reflective surfaces 83 are arranged perpendicular to each other and converge at a convergence point E3. The central axis F3 of the first right reflector 73 extends horizontally from the convergence point E3 along the front-to-back direction of the motorcycle 61. In other words, the angle between the central axis F3 of the first right reflector 73 and the front-to-back direction of the motorcycle 61 is 0 degrees.

[0104] The second right reflector 74 is arranged in a reverse position relative to the first right reflector 73. The second right reflector 74 includes three second right reflective surfaces 84. The three second right reflective surfaces 84 are arranged perpendicular to each other and converge at a convergence point E4. The convergence point E4 of the second right reflector 74 is shifted to the right relative to the convergence point E3 of the first right reflector 73. The central axis F4 of the second right reflector 74 extends horizontally and obliquely toward the right front from the convergence point E4. The angle θ6 between the central axis F4 of the second right reflector 74 and the front-to-back direction of the motorcycle 61 is set to within 45 degrees (e.g., 40 degrees).

[0105] <Effects of the Third Embodiment>

[0106] The multiple reflectors 71-74 include a first left reflector 71 that opens toward the front of the motorcycle 61, a second left reflector 72 that opens obliquely toward the left front of the motorcycle 61, a first right reflector 73 that opens toward the front of the motorcycle 61, and a second right reflector 74 that opens obliquely toward the right front of the motorcycle 61. This allows millimeter waves incident from the front of the motorcycle 61, obliquely incident from the left front, and obliquely incident from the right front to be reflected over a wide range. This further improves millimeter wave reflection performance.

[0107] <Modification>

[0108] Hereinafter, only modifications common to the first to third embodiments will be described with reference to the first embodiment.

[0109] In the first embodiment, the outer surface of one of the left reflective plates 34 of the left reflector 31 and the outer surface of one of the right reflective plates 37 of the right reflector 32 are joined and fixed to each other. Figure 12 As shown, one of the left reflective plates 34 of the left reflector 31 and one of the right reflective plates 37 of the right reflector 32 can be formed by a single common reflective plate 39. In other words, the left reflector 31 and the right reflector 32 can share the single common reflective plate 39. Accordingly, the area between the left reflector 31 and the right reflector 32 that does not reflect millimeter waves can be minimized.

[0110] In the first embodiment, when viewed in the direction of the central axes B1-B2, the reflective regions of the reflectors 31 and 32 form a regular hexagon. In another embodiment, when viewed in the direction of the central axes B1-B2, the reflective regions of the reflectors 31 and 32 may have a shape other than a regular hexagon (e.g., an equilateral triangle or a nine-sided triangle).

[0111] In the first embodiment, each reflecting surface 35, 38 of the reflectors 31, 32 is formed as a pentagon. In another embodiment, each reflecting surface 35, 38 of the reflectors 31, 32 may have a shape other than a pentagon (eg, an isosceles right triangle or a square).

[0112] In the first embodiment described above, the reflector structure 7 is arranged only on the front portion of the motorcycle 1. In another embodiment, a reflector structure (not shown) may be arranged not only in the front portion of the motorcycle 1 but also in the rear portion of the motorcycle 1. In such a case, preferably, the reflector of the reflector structure arranged in the rear portion of the motorcycle 1 opens or opens obliquely toward the rear of the motorcycle 1.

[0113] In the above embodiment, the scooter-type motorcycle 1 is an example of a saddle-type vehicle. In another embodiment, a motorcycle other than a scooter (e.g., a sports-type, off-road-type, or naked-type motorcycle) may be an example of a saddle-type vehicle, and a vehicle other than the motorcycle 1 (e.g., a three-wheeled motor vehicle) may be an example of a saddle-type vehicle.

[0114] The description of the specific embodiment has been completed above, but the present invention is not limited to the above-described embodiment or modified examples, and can be implemented in a wide variety of modified forms.

[0115] Reference Signs List

[0116] (First embodiment)

[0117] 1: Motorized two-wheeled vehicle (example of a saddle-type vehicle)

[0118] 3: Body frame

[0119] 6: Car body cover

[0120] 7: Reflector structure

[0121] 16: Front wheel

[0122] 17: Front fender

[0123] 25: Headlights

[0124] 26: Windshield

[0125] 31: Left reflector

[0126] 32: Right reflector

[0127] 35: Left reflective surface

[0128] 38: Right reflective surface

[0129] A1: Gathering Point

[0130] A2: Gathering Point

[0131] B1: Central axis

[0132] B2: Central axis

[0133] X: horizontal center line

[0134] (Second embodiment)

[0135] 41: Motorized two-wheeled vehicle (example of a saddle-type vehicle)

[0136] 43: Reflector structure

[0137] 51: Left reflector

[0138] 52: Right reflector

[0139] 53: Central reflector

[0140] 55: Left reflective surface

[0141] 56: Right reflective surface

[0142] 57: Central reflective surface

[0143] C1: Gathering Point

[0144] C2: Gathering Point

[0145] C3: Gathering Point

[0146] D1: Central axis

[0147] D2: Central axis

[0148] D3: Central axis

[0149] (Third embodiment)

[0150] 61: Motorized two-wheeled vehicle (example of a saddle-type vehicle)

[0151] 63: Reflector structure

[0152] 71: First left reflector

[0153] 72: Second left reflector

[0154] 73: First right reflector

[0155] 74: Second right reflector

[0156] 81: First left reflective surface

[0157] 82: Second left reflective surface

[0158] 83: First right reflective surface

[0159] 84: Second right reflective surface

[0160] E1: Gathering Point

[0161] E2: Gathering Point

[0162] E3: Gathering Point

[0163] E4: Gathering Point

[0164] F1: Central axis

[0165] F2: Center axis

[0166] F3: Center axis

[0167] F4: Center axis

Claims

1. A reflector structure provided in a front portion of a saddle-ride type vehicle to reflect radar waves, the reflector structure comprising a plurality of reflectors including three reflecting surfaces perpendicular to each other, in, All of the plurality of reflectors are opened or obliquely opened toward the front of the saddle-ride type vehicle.

2. The reflector structure according to claim 1, wherein: The plurality of reflectors include: a left reflector arranged to the left of a transverse center line of the saddle-ride type vehicle and opening obliquely toward a left front portion of the saddle-ride type vehicle; and A right reflector is arranged to the right of the transverse center line of the saddle-ride type vehicle and is obliquely opened toward a right front portion of the saddle-ride type vehicle.

3. The reflector structure according to claim 2, wherein: The left reflector and the right reflector are integrally provided.

4. The reflector structure according to claim 2, wherein: The left reflector and the right reflector are spaced apart from each other.

5. The reflector structure according to claim 4, wherein: The plurality of reflectors further include a central reflector that is disposed between the left reflector and the right reflector and opens toward the front of the saddle-ride type vehicle.

6. The reflector structure according to claim 5, wherein: Each reflector of the plurality of reflectors comprises a gathering point of the three reflective surfaces, and The focusing point of the central reflector is shifted forward relative to the focusing points of the left reflector and the right reflector.

7. The reflector structure according to claim 1, wherein: The plurality of reflectors include: a first left reflector arranged to the left of a transverse centerline of the saddle-ride type vehicle and opening toward the front of the saddle-ride type vehicle; a second left reflector disposed behind the first left reflector and opening obliquely toward the left front portion of the saddle-ride type vehicle; a first right reflector arranged to the right of the transverse centerline of the saddle-ride type vehicle and opening toward the front of the saddle-ride type vehicle; and A second right reflector is arranged behind the first right reflector and is obliquely opened toward a right front portion of the saddle-ride type vehicle.

8. The reflector structure according to claim 7, wherein: Each reflector of the plurality of reflectors comprises a gathering point of the three reflective surfaces, and The focusing point of the second left reflector is shifted to the left relative to the focusing point of the first left reflector, and the focusing point of the second right reflector is shifted to the right relative to the focusing point of the first right reflector.

9. The reflector structure according to any one of claims 1 to 8, wherein: The plurality of reflectors are arranged at the same height.

10. The reflector structure according to any one of claims 1 to 8, wherein The plurality of reflectors are arranged symmetrically with respect to a transverse center line of the saddle-ride type vehicle.

11. The reflector structure according to any one of claims 1 to 8, wherein: In a plan view, an angle between a central axis of the plurality of reflectors and a front-rear direction of the saddle-ride type vehicle is within 45 degrees.

12. The reflector structure according to any one of claims 1 to 8, wherein: Central axes of the plurality of reflectors extend horizontally.

13. A saddle-ride type vehicle, comprising the reflector structure according to any one of claims 1 to 6, the saddle-ride type vehicle comprising: body frame; a vehicle body cover, the vehicle body cover covering the vehicle body frame; a headlight disposed on a front surface of the vehicle body cover; as well as a windshield arranged higher than the headlights and attached to the front surface of the vehicle body cover, The reflector structure is arranged higher than the headlight, and the front portion of the reflector structure is covered by the windshield.

14. A saddle-ride type vehicle, comprising the reflector structure according to any one of claims 1, 7 to 8, the saddle-ride type vehicle comprising: body frame; a vehicle body cover, the vehicle body cover covering the vehicle body frame; a headlight disposed on a front surface of the vehicle body cover; as well as a front fender arranged at the front lower portion of the vehicle body frame and covering the upper portion of the front wheel, Wherein, the reflector structure is arranged on the left and right sides of the vehicle body cover, higher than the front fender and lower than the upper end of the headlight.

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