JP2011121510A - Rear lamp of motorcycle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a miniaturized rear lamp, while securing visibility. <P>SOLUTION: This rear lamp 40 of a motorcycle is arranged in a rear part of a vehicle, and is provided for performing the tail lamp function of turning on by switch operation and the stop lamp function of turning on in braking by a common light source 50, and is characterized in that the light from the light source 50 is refracted by a lens 75, and this lens 75 is formed by applying a lens cut different between an upper part 55 and a lower part 53 so that any one of the upper part 55 and the lower part 53 is visible lighter than the other. Since the cut is different, any one of the upper part 55 and the lower part 53 is visible lighter than the other. By dividing lightness-darkness, the rear lamp 40 can be made conspicuous, and high visibility can be provided. The common light source 50 is used for the tail lamp function and the stop lamp function. The rear lamp can be miniaturized more than when separating these light sources 50. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a rear lamp of a motorcycle having a tail lamp function and a stop lamp function.

  The rear lamp of the motorcycle has a tail lamp function that allows the following vehicle to recognize the presence of the motorcycle, and a stop lamp function that indicates that the driver has applied the brake (for example, see Patent Document 1 (FIG. 1). See 2).).

As shown in FIG. 2 of Patent Document 1, the rear lamp (1) (the numbers in parentheses indicate the reference numerals described in Patent Document 1. The same shall apply hereinafter) includes a tail lamp (2T) provided on the upper portion and a tail lamp. A stop lamp (2S) provided in the lower part separately from (2T) and an outer lens (3) that refracts light from these tail lamp (2T) and stop lamp (2S). The outer lens (3) was subjected to fish-eye lens cuts (5S, 5T), and the lens cut in the tail lamp area and the lens cut in the stop lamp area were configured with different lens cuts.
However, when only the tail lamp area or the stop lamp area is viewed, there is no idea of making the lens cut different within the area.

By the way, according to this conventional rear lamp (1), the tail lamp (2T) and the stop lamp (2S) are provided separately, and two substrates for supporting these lamps (2T, 2S) are also required. There is room for improvement in miniaturization.
However, as a light source that has both a tail lamp function and a stop lamp function, there is no idea of making the lens cut different as described above. Even if it was done, the device to raise the attention to other vehicles was desired.
In other words, even when the rear lamp is downsized, consideration is required that can draw attention to the rear lamp.

Japanese Patent No. 4023777

  An object of the present invention is to provide a rear lamp capable of drawing attention to the lamp while reducing the size of the rear lamp.

The invention according to claim 1 is provided in the rear part of the vehicle, and the rear lamp of the motorcycle is configured such that a tail lamp function that is lit by a switch operation and a stop lamp function that is lit when braking is performed by a common light source.
The light from the light source is refracted by a lens, and this lens has different lens cuts at the upper and lower parts so that either the upper part or the lower part looks brighter than the other. To do.

  The invention according to claim 2 is characterized in that the lens cut applied to the upper part is a fish-eye cut and the lens cut applied to the lower part is a Fresnel cut.

  According to a third aspect of the present invention, the rear lamp includes a lens and a clear cover that covers the lens, and the lens is provided perpendicular to the axis of the light source.

  The invention according to claim 4 is characterized in that the light source is a light emitting diode.

  In the invention according to claim 5, the fish-eye cut is formed on the outer surface of the lens and centered on the axis of the light source, and the Fresnel cut is centered on the inner surface of the lens and on the axis of the light source. It is formed.

  The invention according to claim 6 is characterized in that the lens has a substantially semicircular shape convex upward in a front view.

  The invention according to claim 7 is characterized in that the lens having a substantially semicircular shape is subjected to Fresnel cut along a linear lower side and fish-eye cut to the remaining part.

In the invention according to claim 1, a common light source is used for the tail lamp function and the stop lamp function. Compared with the case where these light sources are separately provided, the rear lamp can be reduced in size.
In addition, the lens has different lens cuts at the upper part and the lower part, and either the upper part or the lower part appears brighter than the other, so that the rear lamp can be brightened or darkened. It is possible to attract attention from other vehicles to the rear lamp, and to make the rear lamp stand out, so that high visibility can be obtained.
From the above, it is possible to attract attention to the rear lamp and thus to ensure visibility while reducing the size of the rear lamp.

  In the invention which concerns on Claim 2, the fisheye cut is given to the upper part and the Fresnel cut is given to the lower part. When the light passes through the fish-eye cut, it becomes diffuse light. Further, when the light passes through the Fresnel cut, it becomes straight light. Straight light looks strong and bright against diffuse light. As a result, the lower part of the lens can be seen brighter.

  In the invention according to claim 3, the lens is covered with the clear cover. By covering the lens with a clear cover, it is possible to prevent dust from entering the lens. If dust adheres to the lens, the dust may disturb the light and change the orientation, but according to the present invention, there is no concern.

  In the invention which concerns on Claim 4, LED is used for a light source. LEDs are bright and small. Therefore, the rear lamp can be further downsized by using the LED as the light source.

  In the invention according to claim 5, the fish-eye cut has a lens cut on the outer surface. By applying the fish-eye cut to the outer surface, the light emitted from the light source can be diffused by the fish-eye cut after being diffused by the thickness of the lens. That is, light passing through the fish-eye cut can be diffused more than when the lens cut is applied to the inner surface.

  In addition, the Fresnel cut has a lens cut on the inner surface. There is no concern that the light emitted from the light source will diffuse within the thickness of the lens. That is, compared with the case where the lens cut is made on the outer surface, the Fresnel cut is made on the inner surface, so that the light can travel straighter.

  In the invention according to claim 6, the substantially semicircular lens has a visual effect because the dimensions in the vehicle width direction of the upper part and the lower part are extremely different from those of a horizontally long rectangular lens that has been widely used conventionally. It can be easily demonstrated. Also, since the roundness is emphasized, a soft visual impression is given.

  In the invention according to claim 7, the Fresnel cut surface is brighter than the fisheye cut surface. Since this bright Fresnel cut surface is disposed along the longest lower side, it is possible to create a strip-like bright surface extending laterally, and to further improve visibility from the rear.

1 is a side view of a motorcycle equipped with a rear lamp according to Embodiment 1 of the present invention. FIG. 2 is a view taken in the direction of arrow 2 in FIG. 1. 2 is a cross-sectional view of a rear lamp according to Embodiment 1. FIG. FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. FIG. 5 is a sectional view taken along line 5-5 of FIG. It is a figure explaining refraction of light in the upper part. It is a figure explaining refraction of light in the lower part. It is a figure explaining the relationship between an upper part and a lower part. It is a figure explaining the meter unit containing the switch of a rear lamp. It is a figure explaining the attachment structure of a meter unit. FIG. 6 is a diagram for explaining a rear lamp according to a second embodiment. FIG. 6 is a diagram illustrating light refraction according to a second embodiment. It is a figure explaining the 1st field-the 3rd field.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.

First, Embodiment 1 of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the motorcycle 10 rotates to a vehicle body frame 11, a front fork 13 that is steerably attached to a head pipe 12 provided at the tip of the vehicle body frame 11, and a lower end of the front fork 13. The front wheel 14 that can be freely attached, the front fender 15 that is attached to the front fork 13 and blocks mud and stones that the front wheel 14 jumps up, the headlight 16 that is attached to the front portion of the head pipe 12 and illuminates the front of the vehicle body, and the head A meter unit 17 provided at the upper part of the light 16 and indicated by a broken line, a steering handle 18 provided behind the meter unit 17 for steering the vehicle body, and a back attached to the steering handle 18 for checking the rear. Mirror 21 and fuel are stored on body frame 11 A fuel tank 22, a seat 25 mounted on a seat rail 24 extending rearward from the body frame 11, an engine 26 mounted on the body frame 11, and a swing arm 28 at the rear of the body frame 11. The rear wheel 29 includes a rear cushion 31 that is passed from the swing arm 28 to the seat rail 24 and attenuates the vertical movement of the rear wheel 29, and a rear lamp 40 that is attached to the rear portion of the seat rail 24.

An intake pipe 41 is connected to the engine 26. The intake pipe 41 is purified by an air cleaner disposed below the seat 25, and supplies an air-fuel mixture mixed with fuel by the carburetor 43 to the engine 26.
Further, exhaust pipes 44 and 44 are extended from the engine 26, and a muffler 45 is connected to the exhaust pipes 44 and 44.

The vehicle body frame 11 includes a head pipe 12 that constitutes a front end, a main frame 47 that extends rearward from the head pipe 12 and extends rearward, and then extends obliquely downward, and rearward from the main frame 47. The seat rail 24 extends to the rear and the down frame 48 extends obliquely downward and rearward from the front end of the main frame 47.
The rear lamp 40 according to the present invention will be described in detail in the following figures.

  As shown in FIG. 2, when the rear lamp 40 is viewed from the front, a plurality (15 in this example) of light sources 50 are arranged. These light sources 50 have a tail lamp function that is turned on by a switch operation and a stop lamp function that is turned on during braking.

The light emitted from the plurality of light sources 50 is refracted by the lens 75 covered with the clear lens 51. The light source 50, the lens 75, and the clear lens 51 are provided in this order from the rear surface to the front surface.
The lens 75 is divided into two regions, a lower portion 53 and an upper portion 55, with different lens cuts made at the top and bottom.

The light source 50 can be a light emitting diode (hereinafter referred to as LED). Since the LED has a long life, when the LED is used for the light source 50, the life of the rear lamp 40 can be extended. Also, the LED is bright and small. Therefore, when the LED is used for the light source 50, the rear lamp can be further downsized.
The mounting structure of the rear lamp 40 will be described with reference to the next figure.

  As shown in FIG. 3, the rear lamp 40 includes a stay 61 supported by a seat rail (FIG. 1, reference numeral 24) and a lower bolt that is attached to a hole 62 formed in the stay 61 and supports a lower bolt 63. A support member 64; a base member 68 in which a lower bolt 63 sandwiching the lower bolt support member 64 using a washer 65 and a nut 66 is embedded; and a housing 72 supported by the base member 68 via a screw 69; A substrate 74 attached to the housing 72 via a screw 73 and supporting the light source 50; a lens 75 connected to the end of the housing 72 so as to cover the substrate 74 and refracting light from the light source 50; Electricity is sent to the light source 50 and the clear cover 51 that covers the lens 75 and is attached to the base member 68 via the sealing material 76 at the end. A tube 78 that bundling a plurality of harnesses 77 because consists connector 79. which is connected to the distal end of the harness 77.

In addition to the lower bolt 63, an upper bolt 82 indicated by a broken line is embedded in the base member 68. The upper bolt 82 is supported by an upper bolt support member 83, and the upper bolt support member 83 is sandwiched between a washer 84, a nut 85, and a base member 68.
That is, the base member 68 is attached to the stay 61 via the lower bolt 63 and the upper bolt 82.

  The lens 75 is covered with a clear cover 51. Covering the lens 75 with the clear cover 51 can prevent dust from entering the lens. If dust adheres to the lens, the dust may disturb the light and change the orientation, but according to the present invention, there is no concern.

In addition, the lens 75 is provided perpendicular to the axis 87 of the light source 50. Since it is provided perpendicular to the axis 87 of the light source 50, the lens may be cut perpendicularly to the lens 75. That is, processing is easier than when the lens 75 is tilted, and the processing time of the lens 75 can be shortened.
Details of the lens cut applied to the lens 75 will be described below with reference to the drawings.

  As shown in FIG. 4, at the upper portion 55 of the lens 75 (see also FIG. 2), a fish-eye cut 89 is applied to the outer surface, and prism cuts 92, 92 are applied to the inner surface.

  Two upper bolts 82 and 82 are embedded on the left and right. Three bolts of the upper bolts 82 and 82 and the lower bolt 63 are embedded in the base member 68 and attached to the stay 61.

  As shown in FIG. 5, a Fresnel cut 95 is applied to the inner surface of the lower portion 53 of the lens 75 (see also FIG. 2). A prism cut 96 is applied to a portion of the outer surface that overlaps the axis 87 of the light source 50, and a flute cut 97 is applied to a portion between the prism cuts 96 and 96.

  As shown in FIG. 6, in the upper portion 55, the axis 87 overlaps the center O <b> 1 of the fisheye cut 89. Light emitted from the light source 50 enters the lens 75 while diffusing, and proceeds while being slightly diffused in the lens 75 by the prism cut 92 (see also the reference numeral 92 indicated by a concentric circle in the upper portion 55 in FIG. 2). ). The light that has traveled through the lens 75 is diffused by the fish-eye cut 89 (see also the reference numeral 89 shown in the upper portion 55 in FIG. 2).

  In order to diffuse the light emitted from the light source 50, a fish-eye cut 89 is provided on the outer surface of the lens 75. By applying the fisheye cut 89 to the outer surface, the light emitted from the light source 50 can be diffused by the thickness of the lens 75 and further diffused by the fisheye cut 89. That is, the light passing through the fish-eye cut 89 can be more diffused than when the lens cut is applied to the inner surface.

  As shown in FIG. 7A, in the lower portion 53, the axis 87 overlaps the center O2 of the Fresnel cut 95. The light emitted from the light source 50 enters the lens 75 while being diffused, and is caused to travel straight through the lens 75 by the Fresnel cut 95 (see also the reference numeral 89 indicated by a concentric circle in the lower portion 53 in FIG. 2). The light that travels straight through the lens 75 is diffused by the prism cut 96.

  As shown in FIG. 5B, a part of the light emitted from the light source 50 in the lower portion 53 enters the lens 75 while diffusing, and is moved straight through the lens 75 by the Fresnel cut 95. The light that travels straight through the lens 75 is slightly diffused by the flute cut 97.

(A) and (b) can be summarized as follows.
In the lower part 53 where light from the light source 50 is desired to travel straight, a Fresnel cut 95 is applied to the inner surface of the lens 75. There is no concern that the light emitted from the light source 50 will diffuse within the thickness of the lens 75. That is, compared with the case where the lens cut is applied to the outer surface, the Fresnel cut 95 is applied to the inner surface, so that the light can travel further straight.

  In addition, the lens 75 is provided perpendicular to the axis 87 of the light source 50. By being provided perpendicular to the axis 87 of the light source 50, the light that passes through the Fresnel cut 95 out of the light emitted from the light source 50 is directly advanced in the axial direction of the light source 50. Visibility can be enhanced by causing light to travel straight in the axial direction of the light source 50.

A lens cut such as a prism cut 96 or a flute cut 97 is made on the outer surface of the lower portion 53. By cutting these lenses 96 and 97 on the outer surface, a more characteristic appearance can be obtained and the aesthetics are enhanced.
The summary of FIGS. 6 and 7 will be described with reference to FIG.

As shown in FIG. 8, the light sources 50 in the lower portion 53 are arranged in a straight line in the axle direction as indicated by an imaginary line 52.
The light sources 50 in the upper part 55 are arranged so as to exhibit a convex semicircular shape as indicated by an imaginary line 54.

  In the upper part 55, a fish-eye cut is applied to the outer surface (front side of the drawing) of the lens 75 covered with the clear lens 51. In the lower part 53, the inner surface (the back side of the drawing) of the lens 75 is Fresnel cut. When the light passes through the fish-eye cut, it becomes diffuse light. Further, when the light passes through the Fresnel cut, it becomes straight light. Straight light looks strong and bright against diffuse light. As a result, the lower portion 53 of the lens 75 can be made brighter.

In addition, a common light source 50 is used for the tail lamp function and the stop lamp function. Compared with the case where these light sources 50 are separated, the rear lamp 40 can be downsized.
In addition, the lens 75 has different lens cuts at the upper portion 55 and the lower portion 53, and either the upper portion 55 or the lower portion 53 appears brighter than the other, thereby making the rear lamp 40 lighter or darker. Can do. Attention to the rear lamp 40 from other vehicles can be aroused to make the rear lamp 40 stand out, and high visibility can be obtained.
From the above, it is possible to attract attention to the rear lamp 40 and to ensure visibility while reducing the size of the rear lamp 40.

  The substantially semicircular lens 75 can easily exhibit a visual effect because the dimension of the upper portion 55 and the lower portion 53 in the vehicle width direction is changed as compared with a horizontally long rectangular lens that has been widely used conventionally. . Also, since the roundness is emphasized, a soft visual impression is given.

The Fresnel cut surface (lower 53) is brighter than the fisheye cut surface (upper 55). Since this bright Fresnel cut surface is disposed along the longest lower side, it is possible to create a strip-like bright surface extending laterally, and to further improve visibility from the rear.
The tail lamp function of the rear lamp 40 according to the present invention is turned on by a switch operation. The meter unit in which such a switch is arranged will be described with reference to the next figure.

  As shown in FIG. 9, the meter unit 17 includes a switch 102 for switching on and off the rear lamp (FIG. 1, reference numeral 40), a speedometer 103 with a digital display, and a tachometer 104 with an analog display of the number of revolutions. A gasoline meter 105 that displays the remaining amount of fuel in an analog manner is provided.

In the meter unit 17, when the switch 102 is turned on, the backlights of the analog display tachometer 104 and the gasoline meter 105 are turned on in addition to the rear lamp.
On the other hand, the digital display speedometer 103 is always lit regardless of whether the switch 102 is on or off. The visibility of the digital display speedometer 103 is enhanced by always turning on the backlight.
How to install such a meter unit 17 will be described with reference to the next figure.

As shown in FIG. 10, the meter unit 17 is attached using nuts 109 and 109 after passing bolts 106 and 106 embedded in the meter unit 17 through attachment holes 108 and 108 of the stay 107.
The stay 107 is attached by being inserted into the top bridge 13 a of the front fork 13.
Another embodiment of the rear lamp (FIG. 2, reference numeral 40) will be described in detail in the following figure.

  As shown in FIG. 11, the rear lamp 110 has a plurality of different lens cuts on the inner surface of the upper portion 55 having a fisheye cut 89 on the outer surface. That is, prism cuts 92 were applied to both ends of the inner surface, and Fresnel cuts 111 were applied to portions sandwiched between the prism cuts 92.

  Of the lens 112, a region having a fisheye cut 89 on the outer surface and a Fresnel cut 111 on the inner surface is a first region 114, a region having a fisheye cut 89 on the outer surface and a prism cut 92 on the inner surface is a second region 115.

That is, in Example 2, the upper portion 55 is configured by the first region 114 and the second region 115 having different lens cuts on the inner surface. The refraction of the light in the second region 115 has been described with reference to FIG.
The refraction of light in the first region 114 will be described in detail with reference to the next figure.

  As shown in FIG. 12, in the first region 114, the axis 87 overlaps the center O <b> 3 of the fisheye cut 89. The light emitted from the light source 50 enters the lens 112 while diffusing and is caused to travel straight through the lens 75 by the Fresnel cut 111. The light that travels straight through the lens 75 is diffused by the fish-eye cut 89.

  Returning to FIG. 10, when comparing the first region 114 and the second region 115, the light from the light source 50 is emitted from the light source 50 rather than the first region 114 in the second region 115 because the light is diffused by the prism cut 92. Light is diffused.

That is, when the rear lamp is viewed from the front, the first region 114 having a small diffusion is slightly brighter in the first region 114 and the second region 115. Even when light is diffused using the fish-eye cut 89 on the outer surface, the appearance can be made different by changing the lens cut on the inner surface. Appearance improves by combining light with different appearances.
In addition to the first region 114 and the second region 115, the lens 112 includes a third region composed of a lower portion (FIG. 2, reference numeral 53). These first to third regions will be described in detail with reference to the next figure.

As shown in FIG. 13, the substantially semicircular lens 112 convex upward in front view is divided into a first region 114, a second region 115, and a third region 116 by a combination of inner and outer lens cuts. It has been.
A first region 114 is formed at the top of the upper part 55 having a substantially semicircular shape, and the remaining part of the upper part is a second region.

  A region where the inner surface is Fresnel cut 95 and the outer surface is prism cut 96 or the inner surface is Fresnel cut 95 and the outer surface is flute cut 97 is a third region 116.

Even when the lens is cut in this way, the light becomes diffused light after passing through the fish-eye cut 89. Further, when the light passes through the Fresnel cut 95, it becomes straight light. Straight light looks strong and bright against diffuse light. As a result, the lower portion 53 of the lens 112 can be made brighter. The effect of the present invention can be obtained.
That is, different types of lens cuts can be made on the inner surface of the upper portion 55.

  In addition, although the rear lamp concerning this invention demonstrated using LED in embodiment, a valve | bulb is applicable and is not restricted to LED.

  The rear lamp of the present invention is suitable for a motorcycle.

  DESCRIPTION OF SYMBOLS 10 ... Motorcycle, 40 ... Rear lamp, 50 ... Light source, 51 ... Clear cover, 53 ... Lower part, 55 ... Upper part, 75 ... Lens, 87 ... Axis, 89 ... Fish-eye cut, 95 ... Fresnel cut, 102 ... Switch.

Claims (7)

A rear lamp (40) for a motorcycle, which is provided at the rear of the vehicle and is configured to perform a tail lamp function that is turned on by operating the switch (102) and a stop lamp function that is turned on during braking by a common light source (50). In
The light from the light source (50) is refracted by a lens (75), and this lens (75) has an upper part (55) or a lower part (53) so that either the upper part (55) or the lower part (53) appears brighter than the other ( 55) The rear lamp of the motorcycle, wherein different lens cuts are made in the lower part (53).   The lens cut applied to the upper part (55) is a fish-eye cut (89), and the lens cut applied to the lower part (53) is a Fresnel cut (95). Item 2. A rear lamp for a motorcycle according to item 1. The rear lamp (40) includes the lens (75) and a clear cover (51) covering the lens (75).
The rear lamp of the motorcycle according to claim 1 or 2, wherein the lens (75) is provided perpendicular to the axis (87) of the light source (50).   The rear lamp of the motorcycle according to claim 1, 2 or 3, wherein the light source (50) is a light emitting diode.   The fish-eye cut (89) is formed on the outer surface of the lens (75) and centered on the axis (87) of the light source (50), and the Fresnel cut (95) is formed on the lens (75). The rear lamp of the motorcycle according to any one of claims 1 to 4, wherein the rear lamp is formed so as to be centered on an inner surface of the light source (50) and on an axis (87) of the light source (50).   The rear lamp of the motorcycle according to any one of claims 1 to 5, wherein the lens (75) has a substantially semicircular shape convex upward in a front view.   The lens (75) having a substantially semicircular shape is characterized in that the Fresnel cut (95) is applied along a linear lower side and the fisheye cut (89) is applied to the remaining part. The rear lamp of the motorcycle according to claim 6.

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