CN113844575B

CN113844575B - Bicycle tail lamp capable of adaptively adjusting projection angle

Info

Publication number: CN113844575B
Application number: CN202111129684.1A
Authority: CN
Inventors: 王奕潼; 王鲲鹏; 谷曙媚
Original assignee: Shangdi Experimental Primary School Haidian District Beijing
Current assignee: Shangdi Experimental Primary School Haidian District Beijing
Priority date: 2021-09-26
Filing date: 2021-09-26
Publication date: 2022-10-14
Anticipated expiration: 2041-09-26
Also published as: CN113844575A

Abstract

The invention relates to a bicycle taillight capable of adaptively adjusting a projection angle, which comprises a control switch and a taillight, wherein the control switch is in signal connection with the taillight and is used for sending a switch signal to the taillight; the tail lamp comprises a left projection steering lamp, a right projection steering lamp, a power supply and a control circuit, wherein the power supply and the control circuit are simultaneously electrically connected with the left projection steering lamp and the right projection steering lamp and are used for receiving a switch signal sent by the control switch and controlling the left projection steering lamp and the right projection steering lamp to be turned on or off according to the switch signal; the left projection steering lamp and the right projection steering lamp respectively comprise a projection lamp and a posture adjusting device, the projection lamps are installed on the posture adjusting devices, and the posture adjusting devices can adjust the light-emitting angles of the projection lamps according to the inclination angles of the bicycles. The bicycle tail lamp provided by the invention adopts the posture adjusting device, so that the light emitting angle of the projection lamp can be adjusted according to the inclination angle of the bicycle, and the warning effect is prevented from being influenced by the large change of the projection pattern when the bicycle turns.

Description

Bicycle tail lamp capable of adaptively adjusting projection angle

Technical Field

The invention relates to the technical field of bicycles, in particular to a bicycle tail lamp capable of adaptively adjusting a projection angle.

Background

As an environment-friendly, healthy and convenient trip mode, the bicycle plays a prominent role in daily commuting, body-building exercise and other aspects, and the riding safety problem is more and more concerned by people. The bicycle tail lamp, especially the tail lamp that can self-luminous is as the safety part on the car, can have and effectively remind the rear to come the car, protects the safety of riding people.

At present, the tail lamp capable of automatically emitting light mainly comprises two types, namely, the tail lamp is manually controlled to be turned on or off in a button mode through a manual mode; and the other is automatic, and measuring devices such as an acceleration sensor, a brightness sensor and the like are added on the basis of manual operation, so that the brightness and the flicker form of the tail lamp are automatically adjusted.

In addition, in order to further increase the warning performance of the tail lamp, a tail lamp which adopts a projection mode to expand the irradiation range is also provided, mainly, a fixed projection device is simply added on the tail lamp to project a preset pattern on the ground, but the projection angle of the preset pattern cannot be adaptively adjusted according to the riding state, and particularly, when a vehicle turns, the pattern and the warning range on the ground are greatly changed, so that the warning effect of the tail lamp is influenced.

Therefore, in order to avoid the large change of the projection pattern, it is urgently needed to provide a bicycle tail lamp capable of adaptively adjusting the projection angle.

Disclosure of Invention

Technical problem to be solved

In view of the above disadvantages and shortcomings of the prior art, the present invention provides a bicycle tail light capable of adaptively adjusting a projection angle, which solves the technical problem that the existing bicycle tail light cannot adaptively adjust the projection angle according to a riding state.

(II) technical scheme

In order to achieve the purpose, the invention adopts the main technical scheme that:

the embodiment of the invention provides a bicycle taillight capable of adaptively adjusting a projection angle, which comprises a control switch and a taillight, wherein the control switch is in signal connection with the taillight and is used for sending a switch signal to the taillight;

the tail lamp comprises a left projection steering lamp, a right projection steering lamp, a power supply and a control circuit, wherein the power supply and the control circuit are simultaneously electrically connected with the left projection steering lamp and the right projection steering lamp and are used for receiving a switch signal sent by the control switch and controlling the left projection steering lamp and the right projection steering lamp to be turned on or off according to the switch signal;

the left projection steering lamp and the right projection steering lamp respectively comprise a projection lamp and a posture adjusting device, the projection lamps are installed on the posture adjusting devices, and the posture adjusting devices can adjust the light emitting angles of the projection lamps according to the inclination angles of the bicycles;

the posture adjusting device comprises a projection lamp bracket provided with a projection lamp, a projection lamp bracket angle adjusting mechanism and a fan-shaped protective cover;

the projection lamp holder and the projection lamp holder angle adjusting mechanism are both positioned in the protective cover, one end of the projection lamp holder is installed on the inner wall of the protective cover through the projection lamp holder angle adjusting mechanism, the other end of the projection lamp holder faces the arc-shaped area of the protective cover, and the projection lamp holder angle adjusting mechanism is used for adjusting the included angle between the projection lamp holder and the ground;

the projection lamp holder angle adjusting mechanism comprises a gravity swing rod suspended in the protective cover, the upper end of the gravity swing rod is rotatably connected with the top wall of the protective cover, the projection lamp holder is fixedly arranged on the gravity swing rod, and the included angle between the projection lamp holder and the gravity swing rod ranges from 30 degrees to 60 degrees.

Optionally, the posture adjusting device further comprises two limiting components, wherein the two limiting components are respectively positioned at the upper side and the lower side of the projection lamp holder and fixedly arranged on the inner wall of the arc-shaped area of the protective cover to limit the rotation of the projection lamp holder;

the arc-shaped area of the protective cover between the two limiting parts is a light-transmitting part made of transparent materials.

Optionally, the projection lamp comprises:

the light source comprises red and yellow LED lamps;

the lens group comprises a plurality of lenses and is used for receiving and collimating light rays;

the projection film is a transmission type fixed image layer, and is prefabricated with a specified pattern, wherein the pattern is a left arrow and a right arrow;

the projection lens comprises a plurality of lenses with diopter.

Optionally, the tail light further comprises a brake light and a brake sensing module electrically connected with the power supply and the control circuit;

the brake sensing module is used for measuring the acceleration of the bicycle in real time and sending the acceleration to the power supply and the control circuit, and the power supply and the control circuit select whether to send a first control instruction to the brake lamp according to the received acceleration:

if the value of the acceleration of the bicycle opposite to the movement direction of the bicycle is larger than a set threshold value, a first control instruction is sent to the brake lamp, and the brake lamp is controlled to increase the brightness and last for a first preset time period;

wherein the first preset time period is 2-3 seconds.

Optionally, the control switch comprises a cylindrical housing, a power button, a left turn button, a right turn button, an LED indicator light, and a battery, wherein the power button is electrically connected to the battery for controlling the battery to supply power to power consumption components of the control switch;

the battery is located the inside of casing, power button, left turn button, right turn button, LED pilot lamp set up the surface of casing, the bottom of casing is provided with the buckle, can with casing fixed mounting is on the handlebar of bicycle.

Optionally, the control switch further includes a first bluetooth communication module electrically connected to the left-turn button, the right-turn button and the battery, the tail light further includes a second bluetooth communication module electrically connected to the power supply and the control circuit, and the first bluetooth communication module is connected to the second bluetooth communication module for transmitting the switch signal.

(III) advantageous effects

The invention has the beneficial effects that: according to the bicycle tail lamp capable of adaptively adjusting the projection angle, the posture adjusting device and the projection lamp are adopted, the projection lamp is installed on the posture adjusting device, the posture adjusting device can adjust the light emitting angle of the projection lamp according to the inclination angle of a bicycle, compared with the prior art, the bicycle tail lamp capable of adaptively adjusting the projection angle can enable the included angle between the projection lamp and the ground to be kept unchanged, and the phenomenon that the warning effect is influenced due to the fact that the projection pattern is greatly changed when a bicycle turns is avoided.

Drawings

FIG. 1 is a perspective view of a bicycle tail light for adaptively adjusting a projection angle according to an embodiment 1 of the present invention, wherein the bicycle tail light is mounted on a bicycle;

FIG. 2 is a schematic diagram of the control switch of FIG. 1;

FIG. 3 is a schematic structural view of the tail light of FIG. 1;

FIG. 4 is a schematic diagram of the right projection turn signal lamp of FIG. 3;

FIG. 5 is a schematic light path diagram of a projection lamp of the bicycle tail lamp in accordance with the present invention;

FIG. 6 is a functional block diagram of the embodiment 1 of the bicycle taillight of the present invention;

FIG. 7 is a schematic structural diagram of a right projection turn signal for a bicycle tail lamp in accordance with an embodiment 2 of the present invention;

FIG. 8 is a functional block diagram of embodiment 2 of the bicycle taillight of the present invention.

[ description of reference ]

1: a control switch; 2: a tail light; 3: a housing; 4: a power button; 5: a left turn button; 6: a right turn button; 7: an LED indicator light; 8: a power source; 9: a first Bluetooth communication module; 10: buckling; 11: a brake light; 12 left projection turn light; 13: a right projection turn light; 14: a projection lamp holder; 15: a limiting component; 16: a protective cover; 17: rotating the motor; 18: a gravity swing link; 19: a light source; 20: a lens group; 21: a slide; 22: a projection lens; 23: a light-transmitting portion.

Detailed Description

For the purpose of better explaining the present invention and to facilitate understanding, the present invention will be described in detail by way of specific embodiments with reference to the accompanying drawings.

Example 1:

referring to fig. 1 and 6, the present invention provides a bicycle tail lamp for adaptively adjusting a projection angle, which includes a control switch 1 located on a handlebar of a bicycle and a tail lamp 2 located below a saddle of the bicycle. The control switch 1 is in signal connection with the tail light 2 for sending a switch signal to the tail light 2.

As shown in fig. 3, the tail lamp 2 includes a stop lamp 11, a left projection turn lamp 12, a right projection turn lamp 13, and a power supply and control circuit. The power supply and control circuit is simultaneously electrically connected with the brake lamp 11, the left projection steering lamp 12 and the right projection steering lamp 13 and is used for receiving the switch signal sent by the control switch 1 and controlling the on-off of the brake lamp 11, the left projection steering lamp 12 and the right projection steering lamp 13 according to the switch signal.

The left projection turn light 12 and the right projection turn light 13 each include a projection light and an attitude adjusting device. The projection lamp is installed on the posture adjusting device, and the posture adjusting device can adjust the light-emitting angle of the projection lamp according to the inclination angle of the bicycle, so that a relatively stable projection warning effect is formed.

Furthermore, the tail lamp 2 further comprises a brake sensing module electrically connected with the power supply and the control circuit. The brake sensing module is used for measuring the acceleration of the bicycle in real time and sending the acceleration to the power supply and the control circuit, and the power supply and the control circuit select whether to send a first control instruction to the brake lamp 11 according to the received acceleration:

if the value of the acceleration of the bicycle opposite to the movement direction of the bicycle is larger than the set threshold value, a first control instruction is sent to the brake lamp 11, and the brake lamp 11 is controlled to increase the brightness and last for a first preset time period. Wherein the first preset time period is 2-3 seconds.

Specifically, the stop lamp 11, which is located in the middle of the tail lamp 2, includes an LED lamp array and a transparent cover. The LED lamp array is used for giving out light and reminding, and the transparent lampshade is used for protecting the LED lamp array. After the tail lamp 2 is started, the LED lamp array is in a luminous normally-on state, and surrounding passing vehicles are continuously reminded. When the power supply and the control circuit detect that the bicycle brakes, the first control signal is sent to the brake lamp 11, the LED lamp array obviously increases the brightness and lasts for 2-3 seconds, the warning effect is highlighted, and surrounding vehicles are reminded of avoiding. Preferably, the brake sensing module is an acceleration sensor.

In this embodiment, the power supply in the power supply and control circuit is a rechargeable battery, and a charging interface such as USB is reserved.

Referring to fig. 2, the control switch 1 can be installed at the handle bar of the bicycle near both ends to facilitate manual control by the rider. The control switch 1 includes a cylindrical housing 3, a power button 4, a left turn button 5, a right turn button 6, an LED indicator light 7, and a battery 8. The battery 8 is positioned inside the shell 3, and the power button 4, the left turn button 5, the right turn button 6 and the LED indicator light 7 are arranged on the outer surface of the shell 3. The power button 4 is electrically connected to the battery 8 for controlling the battery 8 to supply power to the electric components of the control switch 1. The left turn button 5 is used to send a left turn signal to the tail light 2, and the right turn button 6 is used to send a right turn signal to the tail light 2.

When the power button 4 is triggered for the first time, the control switch 1 sends a starting signal to a power supply and control circuit, the power supply in the power supply and control circuit supplies power to electric components in the tail lamp 2, the brake lamp 11 is turned on, the left projection steering lamp 12 and the right projection steering lamp 13 are in standby, and meanwhile, the LED indicator lamp 7 on the control switch 1 is turned on; when the left turn button 5 is triggered, the control switch 1 sends a left turn control signal to the power supply and the control circuit, so as to control the left turn projection lamp 12 to be turned on and continue for a second preset time period; when the right turn button 6 is triggered, the control switch 1 sends a right turn control signal to the power supply and the control circuit, and then controls the right turn projection lamp 13 to be turned on and continue for a second preset time period; when the power button 4 is triggered again, the control switch 1 sends a closing signal to the power supply and control circuit, the power supply in the power supply and control circuit stops supplying power to the electric components in the tail lamp 2, and the LED indicator light 7 on the control switch 1 is turned off. In addition, the bottom of the housing 3 is provided with a buckle 10, and the buckle 10 can be fixed on the handle bar of the bicycle by adopting a screw fixing mode. Preferably, the second predetermined period of time is 3-5 seconds.

Further, the control switch 1 further comprises a first bluetooth communication module 9 electrically connected with the left turn button 5, the right turn button 6 and the battery 8, the tail lamp 2 further comprises a second bluetooth communication module electrically connected with the power supply and the control circuit, and the first bluetooth communication module 9 is connected with the second bluetooth communication module and used for transmitting the switch signal. The bicycle tail lamp provided by the invention adopts a Bluetooth connection mode, so that the trouble of installing and wiring in a traditional mode is reduced.

As shown in fig. 4, the right-turn projection lamp 13 includes an attitude adjusting device and a projection lamp. The attitude adjusting device comprises a projection lamp holder 14 for mounting the projection lamp, a projection lamp holder angle adjusting mechanism and a fan-shaped protective cover 16. The projection lamp holder 14 and the projection lamp holder angle adjusting mechanism are both located in the protective cover 16, one end of the projection lamp holder 14 is mounted on the inner wall of the protective cover 16 through the projection lamp holder angle adjusting mechanism, and the other end of the projection lamp holder 14 faces the arc-shaped area of the protective cover 16. The protective cover 16 is used for protecting the projection lamp, the projection lamp holder 14 and the projection lamp holder angle adjusting mechanism, the projection lamp holder 14 is used for fixedly supporting the projection lamp, and the projection lamp holder angle adjusting mechanism is used for adjusting an included angle between the projection lamp holder 14 and the ground. It should be noted that the structure and the operation principle of the left-turn projection lamp 12 and the right-turn projection lamp 13 are the same, and are not described herein again.

In this embodiment, the projection lamp holder angle adjusting mechanism includes a rotation motor 17 and an inclination sensing module. The rotating motor 17 and the inclination sensing module are both electrically connected with the power supply and the control circuit, the body of the rotating motor 17 is fixedly installed on the inner wall of the protective cover 16, and the rotating shaft of the rotating motor 17 is fixedly connected with the projection lamp holder 14. Preferably, the tilt sensing module is an angle sensor.

The inclination sensing module is used for measuring the angle of a bicycle body relative to the ground, sending an inclination angle signal to the power supply and the control circuit, calculating a rotation amplitude control signal of the rotating motor 17 by the power supply and the control circuit according to the received inclination angle signal, sending the rotation amplitude control signal to the rotating motor 17, rotating the projection lamp bracket 14 by the rotating motor 17 according to the received rotation amplitude control signal, and realizing the self-adaptive adjustment of the projection angle of the projection lamp.

The working process of the left and right projection steering lamps of the embodiment is as follows: before the user turns, a left-turn button 5 or a right-turn button 6 on the control switch 1 is triggered, in a second preset time period (for example, 3-5 seconds), a power supply and a control circuit acquire an inclination angle signal measured by an inclination sensing module, the inclination angle is an included angle between a bicycle body and the ground (90 degrees during normal driving), the control circuit calculates a difference value between the inclination angle and 90 degrees, the difference value is used as an angle needing to be adjusted by a rotating motor 17, and then a projection lamp holder 14 and a projection lamp are rotated, so that the included angle between the projection lamp and the ground is kept unchanged, and the influence of the inclination of the bicycle body on a projection pattern is overcome.

Further, the posture adjusting device further comprises two limiting parts 15, wherein the two limiting parts 15 are respectively located on the upper side and the lower side of the projection lamp holder 14 and fixedly arranged on the inner wall of the arc-shaped area of the protective cover 16 to limit the rotation of the projection lamp holder 14 and prevent the rotating motor 17 from driving to damage the projection lamp. The stop member 15 is preferably a flap. In addition, the arc-shaped region of the protective cover 16 between the two position-limiting members 15 is a light-transmitting portion 23 made of a transparent material, and the light of the projection lamp is projected to the ground through the light-transmitting portion 23.

As shown in fig. 5, the projection lamp is used for receiving a steering lamp control signal sent by the power supply and the control circuit, and projecting a designated pattern (such as an arrow) to the ground to remind surrounding passing vehicles and bicycles that the passing vehicles and the bicycles will turn and pay attention to avoiding. The projection lamp comprises a light source 19, a lens group 20, a projection film 21 and a projection lens 22. Wherein, the light source 19 adopts LED lamp, and in order to realize the multi-color projection effect, the light source can select red, two kinds of yellow LED lamps. In the projection process, the red LED lamp and the yellow LED lamp are alternately lighted, so that the color of the projected pattern is changed. The lens assembly 20 includes a plurality of lenses for collecting and collimating light. The slide 21 is a transmissive fixed image layer, on which a predetermined pattern is pre-formed, the pattern is a left arrow and a right arrow, and a projection pattern is formed by the effects of light transmission, blocking and the like. The projection lens 22 includes a plurality of lenses having diopter to finally form a projection, and the projection lens 22 may be any one of a plano-concave lens, a plano-convex lens, a convex-concave lens, a concave-convex lens, a biconcave lens, and a biconvex lens.

The bicycle taillight of this embodiment is owing to adopt the slope condition that the slope response module can effective perception bicycle automobile body to and the projection angle of rotating motor 17 automatic adjustment projection lamp, compares with prior art, and it can make the contained angle on projection lamp and ground keep unchangeable, shows profile and warning effect through effective reinforcing such as projection pattern color change simultaneously.

Example 2:

referring to fig. 7 and 8, in the present embodiment, the projection lamp holder angle adjusting mechanism of the bicycle tail lamp is different from that of embodiment 1 in that the projection lamp holder angle adjusting mechanism of the present embodiment includes a gravity swing link 18 suspended in a protective cover 16, and does not include a rotation motor 17 and an inclination sensing module.

Specifically, the upper end of the gravity swing rod 18 is rotatably connected with the top wall of the protective cover 16 through a rotating shaft, the projection lamp holder 14 is fixedly installed on the gravity swing rod 18, and the included angle between the projection lamp holder 14 and the gravity swing rod 18 ranges from 30 degrees to 60 degrees.

The gravity swing rod 18 is perpendicular to the ground all the time under the action of gravity, and can only freely rotate along a single direction, so that the gravity self-stabilizing effect is achieved, no matter how the bicycle body of the bicycle inclines, the included angle between the projection direction of the projection lamp on the projection lamp bracket 14 and the ground is kept unchanged, the projection pattern cannot be influenced, and the rear coming vehicle is effectively warned.

In addition, the limiting member 15 of the present embodiment is made of an elastic soft material, and is used to limit the rotation of the projection lamp holder 14, so as to prevent the projection lamp holder 14 from excessively swinging and colliding with the protective cover 16, which damages the projection lamp.

In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; either as communication within the two elements or as an interactive relationship of the two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless expressly stated or limited otherwise, a first feature is "on" or "under" a second feature, and the first and second features may be in direct contact, or the first and second features may be in indirect contact via an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lower level than the second feature.

In the description herein, the description of the terms "one embodiment," "some embodiments," "an embodiment," "an example," "a specific example" or "some examples" or the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are illustrative and not restrictive, and that those skilled in the art may make changes, modifications, substitutions and alterations to the above embodiments without departing from the scope of the present invention.

Claims

1. The utility model provides a bicycle tail lamp of self-adaptation adjustment projection angle which characterized in that: the bicycle tail lamp comprises a control switch (1) and a tail lamp (2), wherein the control switch (1) is in signal connection with the tail lamp (2) and is used for sending a switch signal to the tail lamp (2);

the tail lamp (2) comprises a left projection steering lamp (12), a right projection steering lamp (13) and a power supply and control circuit, the power supply and control circuit is simultaneously electrically connected with the left projection steering lamp (12) and the right projection steering lamp (13) and is used for receiving a switch signal sent by the control switch (1) and controlling the turning-on and turning-off of the left projection steering lamp (12) and the right projection steering lamp (13) according to the switch signal;

the left projection steering lamp (12) and the right projection steering lamp (13) respectively comprise a projection lamp and a posture adjusting device, the projection lamps are mounted on the posture adjusting devices, and the posture adjusting devices can adjust the light emitting angles of the projection lamps according to the inclination angles of the bicycles;

the posture adjusting device comprises a projection lamp holder (14) provided with the projection lamp, a projection lamp holder angle adjusting mechanism and a fan-shaped protective cover (16);

the projection lamp holder (14) and the projection lamp holder angle adjusting mechanism are both positioned in the protective cover (16), one end of the projection lamp holder (14) is installed on the inner wall of the protective cover (16) through the projection lamp holder angle adjusting mechanism, the other end of the projection lamp holder (14) faces the arc-shaped area of the protective cover (16), and the projection lamp holder angle adjusting mechanism is used for adjusting an included angle between the projection lamp holder (14) and the ground;

the projection lamp holder angle adjusting mechanism comprises a gravity swing rod (18) suspended in the protective cover (16), the upper end of the gravity swing rod (18) is rotatably connected with the top wall of the protective cover (16), the projection lamp holder (14) is fixedly installed on the gravity swing rod (18), and the included angle range of the projection lamp holder (14) and the gravity swing rod (18) is 30-60 degrees.

2. The bicycle rear light of claim 1, characterized in that: the posture adjusting device further comprises two limiting components (15), wherein the two limiting components (15) are respectively positioned on the upper side and the lower side of the projection lamp holder (14), are fixedly arranged on the inner wall of the arc-shaped area of the protective cover (16) and are used for limiting the rotation of the projection lamp holder (14);

the arc-shaped area of the protective cover (16) between the two limiting parts (15) is a light-transmitting part (23) made of transparent materials.

3. The bicycle rear light of claim 1 or 2, characterized in that: the projection lamp includes:

the light source (19) comprises red and yellow LED lamps;

the lens group (20) comprises a plurality of lenses and is used for receiving and collimating light;

the slide (21), is the fixed image layer of the penetrating type, there is appointed pattern on it in advance, the pattern is left, right arrow;

and a projection lens (22) including a plurality of lenses having diopter.

4. The bicycle rear light of claim 1 or 2, characterized in that: the tail lamp (2) also comprises a brake lamp (11) and a brake sensing module which are electrically connected with the power supply and the control circuit;

the brake sensing module is used for measuring the acceleration of the bicycle in real time and sending the acceleration to the power supply and the control circuit, and the power supply and the control circuit select whether to send a first control instruction to the brake lamp (11) according to the received acceleration:

if the value of the acceleration of the bicycle opposite to the movement direction of the bicycle is larger than a set threshold value, a first control instruction is sent to the brake lamp (11), and the brake lamp (11) is controlled to increase the brightness and continue for a first preset time period;

wherein the first preset time period is 2-3 seconds.

5. The bicycle rear light of claim 1 or 2, characterized in that: the control switch (1) comprises a cylindrical shell (3), a power supply button (4), a left-turning button (5), a right-turning button (6), an LED indicator lamp (7) and a battery (8), wherein the power supply button (4) is electrically connected with the battery (8) and used for controlling the battery (8) to supply power to power utilization parts of the control switch (1);

battery (8) are located the inside of casing (3), power button (4), turn left button (5), turn right button (6), LED pilot lamp (7) set up the surface of casing (3), the bottom of casing (3) is provided with buckle (10), can with casing (3) fixed mounting is on the handlebar of bicycle.

6. The bicycle taillight of claim 5, wherein: control switch (1) still include with turn left button (5), turn right button (6) and battery (8) electricity first bluetooth communication module (9) of being connected, tail lamp (2) still include with the second bluetooth communication module that power and control circuit electricity are connected, first bluetooth communication module (9) with second bluetooth communication module connects for the transmission switching signal.