WO2008026627A1

WO2008026627A1 - Portable electric light for bicycle

Info

Publication number: WO2008026627A1
Application number: PCT/JP2007/066736
Authority: WO
Inventors: Hiroshi Kurihara; Yukinobu Sako; Junya Kusumoto
Original assignee: Panasonic Corporation
Priority date: 2006-08-30
Filing date: 2007-08-29
Publication date: 2008-03-06
Also published as: JP2008059852A

Abstract

A portable electric light for a bicycle is provided with a main body case having an opening at least on a front surface; a front base, which stores a light emitting section and is connected to the main body case from the front side; a battery unit stored in the main body case; and a diffusion lens for projecting light by spreading the transmitted light in prescribed directions. The diffusion lens can be freely attached to and removed from the front base, and can be attached to the front base in a discretionary direction in the optical axis direction.

Description

Specification

Bicycle portable light

Technical field

TECHNICAL FIELD [0001] The present invention relates to a portable electric light for a bicycle mainly intended to be used by attaching a battery to a handle portion of a bicycle using a high power LED as a light source.

Background art

[0002] As disclosed in Patent Document 1, this type of conventional portable electric lamp includes a reflecting mirror disposed in an outer cylinder and a condenser lens, and the condenser lens is disposed on the front surface of the outer cylinder. A structure that is detachably attached is known. The purpose of making the condenser lens detachable is to adjust the condensing state. In other words, the shape of the irradiation is circular, and it is necessary to attach a condensing lens when you want to illuminate far away with a small circle, and when you want to illuminate a wide area near you, remove the condensing lens to make the irradiation circle Use it with a lot of scattered light.

[0003] LEDs have characteristics such as long life and resistance to vibration. In recent years, high-power LEDs have been developed, and the brightness has become much brighter. A high-power LED is an LED with an output of 1W or more. LEDs are also increasing in portable electric lights for bicycles. However, the brightness level is lower than that of bean balls. Considering the case of a portable electric light for bicycles, it is desirable that the illumination is wide and bright, but what is necessary is that the brightness spreads in the horizontal direction. In other words, bicycle lights require elliptical illumination. The problem here arises when the bike handle is tilted and tilted upward! In this case, the elliptical irradiation is inclined, which hinders bicycle driving.

[0004] Patent Document 2 shows a bicycle portable light equipped with an LED for detecting and displaying a battery voltage. Power that needs to be considered for rain and other waterproofing when it comes to portable electric lights for bicycles Patent Document 2 shows a structure in which LEDs are directly exposed on the surface.

Patent Document 1: Japanese Utility Model Publication No. 63-106001

Patent Document 2: Japanese Utility Model Publication No. 7-8901

[0005] In a conventional portable electric light attached to the handle of a bicycle, although the illumination range is wide in a diffused state, the entire range becomes ugly because it is simply circular. Ming In order to reduce the light concentration, only a small area can be illuminated, so the horizontal illuminance necessary for a bicycle headlamp cannot be secured! /, And! / /

Disclosure of the invention

[0006] In view of the above-described conventional problems, the present invention provides a portable portable light for a bicycle that can secure the illuminance in the horizontal direction necessary as a headlight for a bicycle not only in a light-collected state but also in a diffused state. The purpose is to do.

[0007] In order to solve the above-described problem, a bicycle portable light according to the present invention includes a main body case having an opening at least on the front surface, a front base in which a light emitting unit is housed and connected to the main body case from the front side, A battery unit housed in the main body case, and a diffuser lens that emits light so that the transmitted light spreads in a predetermined direction, the diffuser lens being detachable from the base, and A bicycle portable electric light that can be attached to the front base in an arbitrary direction around an optical axis.

[0008] Also, the bicycle portable light according to the present invention includes a main body case having at least an opening on the front surface, a front base in which a light emitting unit is stored and connected to the main body case from the front side, and a main body case. A bicycle unit that is attached to the front base so as to be rotatable about an optical axis, and a diffuser lens that emits light so that transmitted light spreads in a predetermined direction. It is a portable electric light.

Brief Description of Drawings

FIG. 1 is a cross-sectional view of a portable electric lamp for a bicycle according to an embodiment of the present invention.

[FIG. 2] (A) is a perspective view of a main body case of the bicycle portable light according to the embodiment, (B) is a cross-sectional view of a diffuser lens of the bicycle portable light, and (C) of the bicycle portable light. FIG. 3 is a perspective view showing the periphery of a front-base lens in an exploded manner for each part.

FIG. 3 is an exploded perspective view showing the parts around the high-power LED and heat sink of the bicycle portable light.

FIG. 4 is a perspective view showing the battery periphery of the battery unit of the portable electric light for bicycle in an exploded manner for each part.

FIG. 5 is an exploded perspective view showing parts around the switch of the battery unit of the portable electric light for bicycles. [Fig. 6] Fig. 6 is a perspective view showing the battery lid of the bicycle portable lamp exploded for each part.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

FIG. 1 is a cross-sectional view showing an embodiment of a bicycle portable lamp according to the present invention. Fig. 2 (A) is a perspective view of the main body case of the bicycle portable light according to this embodiment, Fig. 2 (B) is a cross-sectional view of the diffuser lens of the bicycle portable light, and Fig. 2 (C) is the same. Fig. 3 is an exploded perspective view showing the periphery of the front base lens of the bicycle portable light for each component, and Fig. 3 is an exploded perspective view showing the components around the high-power LED and the heat sink of the bicycle portable light. Fig. 4 is a perspective view showing the battery periphery of the battery unit of the bicycle portable light exploded in parts, and Fig. 5 shows the switch periphery of the battery unit of the bicycle portable light divided into parts. FIG. 6 is an exploded perspective view showing the battery lid of the bicycle portable light for each part.

[0012] First, the structure of the main body portion and the front portion of the bicycle portable light according to the present embodiment will be described with reference to FIGS. The bicycle portable light has a main body case 1 and a metal front base 2. The front base 2 is formed in a cylindrical shape as a whole. The main body case 1 is formed in a cylindrical shape, and the left end in FIG. 2 (A) is the opening end la on the front side, and the right end in FIG. 2 (A) is the rear side. The open end of the lc. A screw lb made of a female screw is formed on the inner peripheral surface of the front opening end la, and a screw Id made of a female screw is formed on the inner peripheral surface of the rear opening end lc.

As shown in FIG. 2C, the front base 2 has a cylindrical base body 2d. The right end of FIG. 2 (C) is a force S that is the rear end of the base body 2d, and a screw 2a that is an external thread is formed on the outer peripheral surface of the right end. The screw 2a is configured to be able to be screwed to the screw lb at the front opening end la of the main body case 1. A screw 2b made of an internal thread is formed on the inner peripheral surface of the rear end portion of the base body 2d.

[0014] An O-ring 3 as a seal member is attached to a fastening portion between the main body case 1 and the front base 2. That is, the O-ring 3 is sandwiched between the main body case 1 and the front base 2. Thereby, the fastening part of the main body case 1 and the front base 2 has a waterproof structure. A transparent lens 4 is accommodated in the front base 2. Lens 4 has a bottomed cylindrical shape. The cylindrical portion 4d of the lens 4 is adapted to be along the inner surface of the front base 2.

[0016] On the inner surface of the cylindrical portion 4d of the lens 4, a rib 4a extending along the axial direction and a protrusion 4b disposed adjacent to the rib 4a are provided. The protrusion 4b is disposed on the extended line of the rib 4a with a predetermined interval between the protrusion 4b and the rib 4a. A reflecting mirror 5 is disposed inside the lens 4, and the reflecting mirror 5 is fixed to the lens 4 by fitting its flange portion 5 a between the rib 4 a and the protrusion 4 b of the lens 4. Yes.

[0017] A groove 4c is formed on the outer peripheral surface of the cylindrical portion 4d of the lens 4, and an O-ring 6 as a seal member is attached to the groove 4c. The O-ring 6 is sandwiched between the lens 4 and the front base 2. This provides a waterproof structure between the lens 4 and the front base 2.

The LED 8 as a light emitting unit is a high output type having an output of 1 W or more, and a heat radiating member 7 for radiating the heat of the LED 8 is provided on the back side of the LED 8. The heat radiating member 7 has a cylindrical main body portion 7d and a wall portion 7a provided at a substantially central position of the main body portion 7d. The wall portion 7a divides the space in the main body portion 7d into the front and rear. It has been. The front end surface of the main body portion 7d is in contact with the rear end surface of the cylindrical portion 4d of the lens 4.

In the center of the wall portion 7a, a convex portion 7b that can contact the back surface of the LED 8 is provided. Further, a screw 7c made of an external thread is provided on the outer peripheral surface of the main body 7d. The heat radiating member 7 is supported by the front base 2 by screwing the screws 7c of the main body 7d to the screws 2b formed inside the front base 2. The lens 4 is firmly held on the front base 2 by screwing of the heat radiating member 7. In addition, since the heat dissipating member 7 and the front base 2 are screw-fastened, it is possible to increase the contact area by uneven contact with the screw S, which allows the heat of the high-power LED 8 to be transferred to the front base 2. Can communicate efficiently. The LED 8 faces the central hole 5b that is the optical center of the reflecting mirror 5.

[0020] A terminal plate 9 and a substrate 12 are fixed to the heat dissipating member 7. The terminal plate 9 has a disk-shaped main body portion and has a shape in which the outer peripheral portion and the central portion of the main body portion protrude in the front-rear direction. The central tube 9d protruding at the center has an inner hole 9a that opens to the rear surface side. An anode spring 10 is press-fitted into the inner hole 9a, and the anode spring 10 is inserted into the inner hole 9a. It is locked by the formed claw 9b. A claw 9c is provided on the outer surface of the central cylinder 9d, and a cathode spring 11 is fitted to the central cylinder 9d by the claw 9c. The terminal board 9 and the substrate 12 on which the LED 8 is mounted are coupled to each other by two screws 13 so as to sandwich the wall portion 7a of the heat radiating member 7 from both sides.

The anode spring 10 and the cathode spring 11 are provided with extension portions 10a and 11a, respectively, and these extension portions 10a and 11a are connected to the substrate 12 and can be electrically connected to the LED 8. It has become. Further, the electrical connection portion of the anode spring 10 is positioned at the center, and the cathode spring 11 is positioned around the anode spring 10.

[0022] A diffuser lens 28 is attached to the front base 2. As shown in FIGS. 2 (B) and 2 (C), the diffuser lens 28 is formed in a circular shape in plan view, and notches are formed at both left and right end portions. The diffuser lens 28 has claw portions 28a and convex portions 28b at the notches. The claw portion 28a has a shape extending in the optical axis direction from the notch portion and projecting radially outward from the tip end portion. The convex portion 28b is provided outside the claw portion 28a.

[0023] In the example shown in the drawing, a notch and a claw 28a are provided on the left and right of the lens surface of the diffuser lens 28, and a force S showing a configuration having a pair of claw 28a, is not limited to this. Absent. For example, one or more notches and claw portions 28a may be provided. However, when the number of the claw portions 28a is one, it is preferable to form the claw portion 28a so as to have a certain length in the circumferential direction to stably hold the diffuser lens 28.

On the other hand, the front base 2 is provided with a stopper 2e and a support portion 2f at the front end of the base body 2d. The stopper 2e is a portion protruding radially inward from the base body 2d and is formed in an annular shape. The lens 4 is in contact with the rear surface of the stagger 2e. On the other hand, the support portion 2f is a portion that protrudes further inward in the radial direction from the front side portion on the inner peripheral surface of the stopper 2e, and is formed in an annular shape. For this reason, a gap 2c is formed between the lens 4 in contact with the stopper 2e and the support portion 2f. Since this gap 2c is formed over the entire circumference of the front base 2, it has an annular shape.

[0025] The diffuser lens 28 is attached to the support 2f from the front side of the support 2f. That is, by pressing the convex portion 28b, the claw portion 28a is bent radially inward, and in this state, the front The force S can be attached to the support portion 2f from the front side by inserting it into the front opening of the case 2. The claw portion 28a of the diffuser lens 28 is inserted into the gap 2c between the support portion 2f and the end face of the lens 4. In this state, the diffuser lens 28 sandwiches the support portion 2f in the front-rear direction by the main body portion 28d and the claw portion 28a. Further, since the convex portion 28b is press-fitted into the support portion 2f, the diffuser lens 28 does not rotate by receiving vibration or the like. Further, the diffuser lens 28 can be easily detached from the front base 2 by pressing the convex portion 28b and causing the claw portion 28a to be inward. In other words, the diffuser lens 28 is detachably fitted to the front base 2.

[0026] Convex streaks 28c are provided on the back side of the diffuser lens 28. The convex streaks 28c are formed so as to continuously extend in a predetermined direction, and a plurality of convex streaks 28c are provided. By providing a plurality of convex stripes 28c on the lens surface, the transmitted light can be spread in one direction. That is, the diffuser lens 28 has an elliptical irradiation shape. As described above, the diffuser lens 28 can be attached to and detached from the front base 2 by the claw portion 28a, and can be rotated around the optical axis after being attached. Therefore, the force S can be applied to the irradiation shape of the ellipse in an arbitrary direction by attaching the diffuser lens 28 to the front base 2 in an arbitrary direction, or by rotating it after the attachment. Therefore, in this portable electric light for bicycles, for example, irradiation with a wide elliptical shape can be made horizontally, or irradiation with a wide elliptical shape can be changed vertically.

Next, the battery unit positioned in the main body case 1 will be described with reference to FIGS. 1, 4, and 5. FIG. The battery unit is housed in the main body case 1 and includes a battery 14, a battery case 17, and an insulating plate 18. The battery case 17 is provided with an anode terminal 15 and a cathode terminal 16. The electrical contact portion of the anode terminal 15 is disposed at the central portion on the front surface of the battery case 17. The electrical contact portion of the cathode terminal 16 is disposed around the anode terminal. The insulating plate 18 is bonded and fixed to the battery case 17 so as to hold the anode terminal 15 and the cathode terminal 16.

[0028] Each of the anode terminal 15 and the cathode terminal 16 includes an extending portion extending in the outer peripheral direction from the electrical contact portion, and includes electric wires 15a and 16a extending from the extending portion in the rear surface direction. ing. [0029] A rechargeable battery is used as the battery 14 of the power supply, and the electric wire 14a is an electric wire serving as an anode and a negative electrode of the battery.

[0030] The battery unit includes a first substrate cover 19, a control substrate 21, a second substrate cover 20, and the like. The first substrate cover 19 is disposed on the rear surface of the battery 14. The first board cover 19 supports a control board 21 on which control circuits such as a switch 23 and a battery remaining amount display LED 22 are mounted. The LED 22 is a remaining battery level indicator that is lit when the voltage drops.

[0031] The first substrate cover 19 includes a leg portion 19b extending in the front-rear direction, and a claw 19a is formed on a side surface of the leg portion 19b. On the other hand, the second substrate cover 20 is formed in a bottomed cylindrical shape and has side portions 20c extending in the front-rear direction. A hole 20a is formed in the side portion 20c. The control board 21 is held between the first board cover 19 and the second board cover 20 with the claws 19a of the first board cover 19 fitted in the holes 20a of the second board cover 20. The electric wire 14a of the battery 14 and the electric wires 15a and 16a from the anode terminal 15 and the cathode terminal 16 are all electrically connected to the control board 21.

[0032] The switch 23 and the battery remaining amount display LED 22 are disposed at a substantially central position of the control board 21, and are positioned within a range of a central hole 20b formed in the bottom 20d of the second board cover 20. It is location. That is, when viewed from the rear side, the switch 23 and the LED 22 are within the range of the central hole 20b.

[0033] Next, the configuration of the rear opening lc side of the main body case 1 will be described with reference to FIGS. 1 and 6. FIG. A bottomed cylindrical battery lid 24 is attached to the rear end of the main body case 1. Specifically, the body 24e of the battery cover 24 is provided with a screw 24a made of an external screw, and the battery cover 24 is attached to the body case 1 by screwing the screw 24a with the screw Id of the body case 1. It is attached. The O-ring 3 is attached to the end (rear end) of the screw fastening part between the battery cover 24 and the body case 1. As a result, a waterproof structure is formed at the connection between the main body case 1 and the battery cover 24.

[0034] The battery lid 24 has a hole 24b opened at the center of the bottom surface 24d located at the rear end.

[0035] Between the second substrate cover 20 and the battery lid 24, a switch rubber presser 25 and a switch rubber 27 which is an elastic cover are sandwiched. The switch rubber retainer 25 having a substantially disc shape is provided with a plurality of small convex portions 25a on its outer peripheral surface, and these convex portions 25a are formed on the body of the battery lid 24. It fits into a groove 24c provided on the inner surface of the portion 24e. As a result, the switch rubber retainer 25 is locked. Further, the switch rubber presser 25 presses the flange portion 27a of the switch rubber 27 against the bottom surface 24d of the battery lid 24, so that a waterproof structure for the hole 24b of the battery lid 24 is formed.

[0036] A pin portion 26a of a switch pin 26 is inserted into a central hole 25b of the switch rubber presser 25, and a tip end of the pin portion 26a is connected to the switch 23. The switch pin 26 has a flange 26b for retaining. The flange 26b is in contact with the central portion of the front surface of the switch rubber 27. Accordingly, the switch pin 26 can be advanced by pressing the switch rubber 27.

Here, if the switch rubber 27 is made of a transparent or translucent elastic material, the light emission of the battery remaining amount display LED 22 can be confirmed from the outside. The battery remaining amount display LED 22 is for notifying the remaining amount of the battery, and lights up when the battery voltage falls below a predetermined value, and can prompt the user to replace or charge the battery.

[0038] The switch rubber presser 25 is provided with a cylindrical portion 25c that is a holding portion of the switch pin 26, and a guide cylinder 25d that is arranged concentrically with the cylindrical portion 25c. The cylinder portion 25c has the hole 25b so as to be positioned at the center of the switch rubber presser 25. A switch rubber 27 is attached to the guide tube 25d from the rear side.

[0039] The outer diameter of the cylinder portion 25c is sufficiently smaller than the inner diameter of the guide cylinder 25d. Therefore, a space is formed between the tube portion 25c and the guide tube 25d, and this space penetrates in the thickness direction of the switch rubber presser 25. The tube portion 25c and the guide tube 25d are connected by three ribs 25e. When viewed from the rear side, the LED 22 is within this space and the range of the hole 24b of the battery cover 24. For this reason, the light of the LED 22 passes through the space between the rib 25e and the rib 25e. In other words, the switch rubber presser 25 for supporting the switch pin 26 in addition to the transparent switch rubber 27 is disposed between the bottom surface 24d of the battery cover 24 and the control board 21. LED22 can be faced from the outside by forming a space while holding

[0040] With the configuration as described above, since heat can be radiated by the heat radiating member, a large current can be passed through the LED, and illuminance can be ensured. Force, even bicycle Since the diffuser lens can be rotated even when the illumination is inclined, the diffuser lens can be rotated according to the inclination of various bicycle handles. The spread direction of irradiation can be easily corrected in the horizontal direction. For this reason, it is possible to visually recognize the left and right of the front, and it is possible to drive the bicycle safely.

[0041] In addition, the diffuser lens can be detachably attached to the front surface of the front base, and the diffuser lens can be rotated after installation! Even when the irradiation is slanted, the spreading direction of irradiation can be easily corrected to the horizontal direction by rotating the diffuser lens according to the tilt of the handle.

[0042] In addition, the portable electric light for bicycles needs to be protected against rain and the like, and in particular, electrical components such as LEDs need to be waterproofed. In this embodiment, an LED for displaying the remaining battery level is provided in the vicinity of the switch, and the inertial strength bar is made of a transparent material or a translucent material so that the LED light can be seen from the outside. The LED is not exposed. For this reason, it is possible to check the remaining battery level while ensuring waterproofness. Furthermore, the LED light spreads through the elastic cover and can be seen more greatly.

[0043] In order to make full use of the performance of high-power LEDs, it is necessary to increase the output by flowing current to the maximum, and measures to dissipate heat are necessary. And if the heat dissipating member for heat dissipation is increased, the cost and the shape will increase if the cost increases, making it unsuitable as a portable light. However, in this embodiment, as a heat dissipation measure for high-power LEDs, the front base is made of a metallic material, and the front base and the heat dissipation member are screw-fitted, so even a smaller heat dissipation member can be used for the entire front base. Can dissipate heat. In addition, the contact area of the screw increases and the contact area increases and heat is effectively dissipated, so the output of the high-power LED can be increased, and it is cheaper and smaller in shape! Can be realized.

In the present embodiment, the force shown in the example in which the diffuser lens 28 is configured to be detachable is not limited to this. That is, the diffuser lens 28 may be configured not to be detached from the front base 2 and may be configured to be attached to the front base 2 so as to rotate around the optical axis. [Outline of Embodiment]

Here, an outline of the present embodiment will be described below.

(1) In the present embodiment, it is possible to easily remove the diffuser lens from the front base and attach it to the front base again. At this time, it is possible to change the direction of the diffuser lens according to the shape of the bicycle handle and reattach it. That is, the diffuser lens can be attached to the front base in any direction around the optical axis. Therefore, even if the bicycle portable light is attached to a tilted part of the handle, it is possible to reduce the irradiation range with respect to the optical axis by re-attaching the diffuser lens in the direction corresponding to the inclination of the attachment part. The spreading direction can be adjusted horizontally.

[0047] (2) The diffuser lens is rotatable around the optical axis while being attached to the front base. In this aspect, since the diffuser lens is rotatable with respect to the front base, the direction of the diffuser lens can be changed with the diffuser lens mounted on the front base. Therefore, it is possible to easily adjust the direction in which the irradiation range expands with respect to the optical axis so that it extends horizontally.

[0048] (3) The front base includes a cylindrical base main body portion and an annular support portion provided radially inward of the base main body portion, and the diffuser lens includes a peripheral edge of a lens surface. The claw portion is configured to be engageable with the support portion. In this aspect, since the support portion of the front base is configured in an annular shape and the claw portion is engaged with the support portion, the posture of the diffuser lens is changed to an arbitrary direction around the optical axis. Can be held in a state

Yes

[0049] (4) The light emitting unit is an LED.

[0050] (5) The heat dissipation member is accommodated in the front base in a state in contact with the front base. In this aspect, the heat of the light emitting part can be transferred from the heat dissipation member to the front base to be dissipated.

[0051] (6) The heat radiating member is screwed to the front base. In this aspect, since the contact area between the heat dissipation member and the front base can be increased, the heat transfer efficiency from the heat dissipation member to the front base can be improved. As a result, it is possible to improve the heat dissipation characteristics of the front base without increasing the size of the heat dissipation member. [0052] (7) The front base includes a cylindrical base main body portion and a stagger that protrudes radially inward from the base main body portion, and a bottomed cylindrical shape between the strobe and the heat radiating member. The lens is held. In this aspect, the lens can be firmly held by screw-fitting the heat radiating member to the front base.

[0053] (8) The main body case also has an opening on the rear surface, and has a battery lid that has an opening and is coupled to a rear end portion of the main body case, and a switch that is housed in the main body case. And an elastic cover capable of closing the opening of the battery lid and operating the switch by an operation through the opening. In this aspect, the switch can be operated by pressing the elastic cover.

[0054] (9) A battery remaining amount display portion housed in the main body case is provided, and the elastic cover is made of a transparent or translucent material. In this aspect, the remaining battery level can be known from the outside.

(10) A seal member is interposed between the battery lid and the main body case. In this aspect, the waterproof function between the battery lid and the main body case can be improved.

[0056] (11) A guide tube is disposed between the switch and the elastic cover, and a switch pin is formed so that a space is formed between the inner surface of the guide tube and the inner peripheral surface of the guide tube. The holding part is provided. In this aspect, the battery remaining amount display portion can be confirmed through the space between the inner peripheral surface of the guide tube and the switch pin holding portion.

[0057] (12) A main body case having an opening at least on the front surface, a light emitting unit is housed, a front base is connected to the main body case from the front side, and a battery unit is housed in the main body case. A light-diffusing lens that emits light so that the light spreads in a predetermined direction, and the light-diffusing lens is a portable electric light for a bicycle that is attached to the front base so as to be rotatable about an optical axis. In this aspect, since the diffuser lens is rotatable with respect to the front base, it is possible to change the direction of the diffuser lens with the diffuser lens mounted on the front base. Therefore, even if it is attached to a tilted part of the bicycle portable light power S and steering wheel, by rotating the diffuser lens around the optical axis according to the inclination of the attachment site, the optical axis It is possible to easily adjust the direction in which the irradiation range is widened to a horizontal force S. Industrial applicability

The bicycle portable light according to the present invention is useful as a headlight for a bicycle because the light spreads in the front horizontal direction when attached to the bicycle.

Claims

The scope of the claims

[1] a body case having an opening at least on the front surface;

A light emitting unit is housed and a front base connected to the main body case from the front side; a battery unit housed in the main body case;

A diffuser lens that emits light so that the transmitted light spreads in a predetermined direction, and the diffuser lens is detachable from the front base and has an arbitrary axis around the optical axis with respect to the front base. Bicycle portable light that can be mounted in any orientation.

2. The bicycle portable light according to claim 1, wherein the diffuser lens is rotatable around an optical axis while being attached to the front base.

[3] The front base has a cylindrical base main body portion and an annular support portion provided radially inward of the base main body portion,

The bicycle portable electric light according to claim 2, wherein the diffuser lens has a claw portion at a peripheral portion of a lens surface, and the claw portion is configured to be engageable with the support portion.

4. The bicycle portable light according to claim 1, wherein the light emitting unit is an LED.

[5] The portable electric light for a bicycle according to claim 4, wherein the front base stores the heat radiating member in contact with the front base.

6. The portable electric lamp for a vehicle according to claim 5, wherein the heat dissipating member is screwed to the front base.

7. The front base includes a cylindrical base body portion, and a bottomed cylindrical lens that is protruded radially inward from the base body portion between the stocker and the heat dissipation member. A portable light for bicycles as described in 1.

[8] The main body case has an opening on the rear surface,

A battery lid having an opening and coupled to a rear end of the main body case;

A switch housed in the body case;

The bicycle portable electric light according to claim 1, further comprising an elastic cover that closes an opening of the battery lid and can operate the switch by an operation through the opening.

[9] A battery remaining amount display portion housed in the main body case is provided. The portable electric lamp for a vehicle according to claim 8, wherein the elastic cover is made of a transparent or translucent material.

10. The bicycle portable light according to claim 8, wherein a seal member is interposed between the battery lid and the main body case.

[11] A guide tube is disposed between the switch and the elastic cover,

10. The bicycle portable light according to claim 9, wherein a switch pin holding portion is provided inside the guide tube so that a space is formed between the guide tube and an inner peripheral surface of the guide tube.

[12] a body case having an opening at least on the front surface;

And a diffuser lens that emits light so that the transmitted light spreads in a predetermined direction. The diffuser lens is attached to the front base so as to be rotatable about an optical axis.