CN101629676B - flashlight - Google Patents

Abstract

The invention relates to a flashlight, which comprises a barrel and a light source device accommodated in the barrel, and the barrel includes a first end portion provided with a light outlet. The flashlight also has a zoom system accommodated in the barrel and located between the light source device and the light outlet. The zoom system includes a first lens, a first electrostrictive ring, a second lens and a second electrostrictive ring from the light outlet to the light source device, and the first lens is fixed on the cylinder near the light outlet. , the first electrostrictive ring and the second electrostrictive ring clamp the second lens. The first electrostrictive ring and the second electrostrictive ring can expand and contract axially as the voltage applied thereon rises and falls, thereby changing the distance between the first lens and the second lens. In the flashlight provided by the present invention, a zoom system is added between the light source device and the light outlet to change the light output angle of the light spot generated by the light source device, so that the flashlight can adjust the size and brightness of the light spot area.

Description

flashlight

technical field

The invention relates to a flashlight.

Background technique

In the process of using the flashlight, we often need close-range irradiation in certain environments, such as reading books or playing cards. At this time, we need a large and soft light spot, while in some other environments, we need long-distance irradiation. , such as when transmitting signals or long-distance inspections, a small and concentrated light spot is required at this time. However, the current flashlights usually use a rotating cylinder or front cover to separate or overlap the focus of the illuminant and the parabolic circular table lamp cup, so that the size of the light spot changes slightly, and it is difficult to generate a small and bright light spot with a large area and light. A well-proportioned light spot cannot meet the needs of various environments.

Therefore, it is necessary to provide a flashlight with a zoom function to meet the needs of flashlights in different environments.

Contents of the invention

In view of this, it is necessary to provide a flashlight with a zoom function.

A flashlight, which includes a barrel, a light source device accommodated in the barrel, the barrel includes a first end with a light outlet. The flashlight also has a zoom system accommodated in the barrel and located between the light source device and the light outlet. The zoom system includes a first lens, a first electrostrictive ring, a second lens and a second electrostrictive ring from the light outlet to the light source device, and the first lens is fixed on the cylinder near the light outlet. , the first electrostrictive ring and the second electrostrictive ring clamp the second lens. The first electrostrictive ring and the second electrostrictive ring can expand and contract axially as the voltage applied thereon rises and falls, thereby changing the distance between the first lens and the second lens.

Compared with the prior art, the flashlight adds a zoom system between the light source device and the light outlet, so that the light spot generated by the light source device can change its light output angle. Therefore, the flashlight can adjust the size and brightness of its light spot area.

Description of drawings

Fig. 1 is a schematic structural diagram of a flashlight provided by an embodiment of the present invention.

FIG. 2 is a schematic circuit diagram of a voltage dividing circuit of the flashlight shown in FIG. 1 .

FIG. 3 is a schematic circuit diagram of the voltage dividing circuit in the flashlight of FIG. 1 when it is electrically connected to the power supply, the first electrostrictive ring, and the second electrostrictive ring.

Detailed ways

The embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

Please refer to FIG. 1 , a flashlight 100 provided by an embodiment of the present invention includes a front cover 10 , a flat mirror 20 , a barrel 30 and a rear cover 40 sequentially along its axial direction.

The front cover 10 is used to fix the plane mirror 20 on the barrel 30 . The front cover 10 has a circular opening 11, and the end of the front cover 10 away from the barrel 30 extends an annular flange 12 along the direction perpendicular to the circular opening 11, the diameter of the annular flange 12 is smaller than that of the plane mirror 20 diameter.

The plane mirror 20 is used to protect the components in the barrel 30 and transmit light. One end of the mirror 20 abuts against the annular flange 12 , and the other end is placed on the barrel 30 .

The barrel 30 has a first end 31 and a second end 32 , the first end 31 is connected to the front cover 10 , and the second end 32 is connected to the rear cover 40 . The first end portion 31 is provided with a light outlet 311 , and the light can be emitted from the light outlet 311 . In this embodiment, the first end portion 31 is connected to the front cover 10 by screwing, and the second end portion 32 is also connected to the rear cover 40 by screwing.

The barrel 30 accommodates a zoom system 33, a light source device 34 and a power supply 35 sequentially from the first end 31 to the second end 32. The outer surface of the barrel 30 is also provided with a switch button 36 and a Focus button 37 .

The zoom system 33 includes a first lens 331 , a first electrostrictive ring 332 , a second lens 333 , a second electrostrictive ring 334 and a mirror holder 335 . Wherein, the first lens 331 is a single-sided convex lens coaxial with the light outlet 311, the first lens 331 is fixed on the cylinder body 30 near the light outlet 311, and has a plane 3311 and a convex surface 3312, wherein the plane 3311 is close to the plane mirror 20. The second lens 333 is a biconvex lens clamped by the first electrostrictive ring 332 and the second electrostrictive ring 334 . Both the first electrostrictive ring 332 and the second electrostrictive ring 334 are made of an electric field responsive polymer material, which can expand and contract along its axial direction as the voltage rises and falls. In this embodiment, the electric field responsive polymer material is "artificial muscle", such as copper vinyl phosphate. The two end surfaces of the mirror base 335 are respectively extended with a first annular flange 3351 and a second annular flange 3352 along the direction of its central axis, and the first annular flange 3351 and the second annular flange 3352 are connected to The sidewall of the mirror base 335 forms a receiving groove 3353 for accommodating the first electrostrictive ring 332 , the second lens 333 and the second electrostrictive ring 334 .

The light source device 34 includes a lamp holder 341 , a parabolic circular truncated lamp cup 342 , and a luminous body 343 . The lamp holder 341 is fixed on the cylinder body 30, the parabolic conical lamp cup 342 is placed on the lamp holder 341 with its opening facing the light outlet 311, and the illuminant 343 is fixed on the lamp holder 341 and extend into the parabolic circular truncated lamp cup 342. It can be understood that the light emitted by the illuminant 343 is reflected and converged by the parabolic conical lamp cup 342 to form a light spot and shoot to the zoom system 33 .

The power source 35 is located between the light source device 34 and the rear cover 40 , and is used to drive the light source device 34 to emit light and drive the zoom system 33 to zoom.

The switch button 36 is used to control the on and off of the power supply 35 and the light source device 34 .

The focusing button 37 is used to adjust the voltage distributed on the first electrostrictive ring 332 and the second electrostrictive ring 334 . Please refer to FIG. 2. In this embodiment, the focusing button 37 is embedded in the barrel 30 and is provided with a voltage divider circuit 200, which includes a sliding resistor R1, a fixed resistor R2, an interface a, a Interface b and an interface c. The sliding resistor R1 has a sliding piece P. The sliding resistor R1 is connected in series with the fixed resistor R2 and is located between the interface a and the interface b, and the interface c is located between the sliding resistor R1 and the fixed resistor R2. Please refer to Fig. 3, wherein the interface a and interface b are connected to the positive and negative poles of the power supply 35 respectively, the first electrostrictive ring 332 is connected between the interface a and the interface c, and the second electrostrictive ring 334 is connected between interface c and interface b. As can be seen from Fig. 3, the sum of the voltages loaded on the first electrostrictive ring 332 and the second electrostrictive ring 334 is constant, but the partial voltage on each electrostrictive ring is adjusted by the slide plate P . In this embodiment, the slide P is adjusted by the focusing button 37 . Therefore, when the focus adjustment button 37 is adjusted to move the sliding piece P to increase the working resistance of the sliding resistor R1, that is, when the voltage loaded on the first electrostrictive ring 332 increases, the first electrostrictive ring 332 increases. The ring 332 expands along its axial direction, and the voltage applied to the second electrostrictive ring 334 decreases correspondingly, and the second electrostrictive ring 334 shrinks along its axial direction, so that the clamped on the first The second lens 333 between the electrostrictive ring 332 and the second electrostrictive ring 334 moves axially to change the distance between the second lens 333 and the first lens 331 to realize zooming. It can be understood that the circuits of the first electrostrictive ring 332 and the second electrostrictive ring 334 are not limited thereto, as long as the adjustment of the first electrostrictive ring 332 and the second electrostrictive ring 334 can be realized. The voltage, and the circuit that makes the sum of the two voltages constant can be used in the present invention.

Compared with the prior art, the flashlight adds a zoom system between the light source device and the light outlet, so that the light spot generated by the light source device can change its light output angle. Therefore, the flashlight can adjust the size and brightness of its light spot area.

It can be understood that those skilled in the art can make various other corresponding changes and deformations according to the technical concept of the present invention, and all these changes and deformations should belong to the protection scope of the claims of the present invention.

Claims (6)

1. A flashlight, which comprises a barrel and a light source device accommodated in the barrel, the barrel includes a first end portion provided with a light outlet, it is characterized in that the flashlight also has a The barrel is also a zoom system located between the light source device and the light outlet. The zoom system includes a first lens, a first electrostrictive ring, a second lens and a second electrostrictive ring in sequence from the light outlet to the light source device. The first electrostrictive ring, the first lens is fixed on the cylinder near the light outlet, the first electrostrictive ring and the second electrostrictive ring clamp the second lens, the first electrostrictive ring and the second electrostrictive ring The second electrostrictive ring can expand and contract axially as the voltage applied thereon rises and falls, thereby changing the distance between the first lens and the second lens, and both the first electrostrictive ring and the second electrostrictive ring are Made of electric field responsive polymer material. 2. The flashlight according to claim 1, wherein the electric field responsive polymer material is copper vinyl phosphoric acid. 3. The flashlight according to claim 1, wherein the zoom system further comprises a mirror base, and the two end faces of the mirror base are respectively extended with a first annular flange and a second flange along the direction of its central axis. An annular flange, the first annular flange and the second annular flange and the side wall of the mirror base form an accommodating groove for accommodating the first electrostrictive ring, the second lens and the second electrostrictive ring. Stretch ring. 4. The flashlight according to claim 1, wherein the light source device comprises a lamp holder fixed on the barrel, a parabolic circular truncated lamp cup with an opening facing the light outlet, and the parabolic circular truncated lamp cup Bearing on the lamp holder, a luminous body fixed on the lamp holder and protruding into the parabolic circular truncated lamp cup. 5. The flashlight according to claim 1, further comprising a front cover connected to the first end and a plane mirror clamped between the front cover and the barrel, the plane mirror Used to protect the components in the barrel and allow light to pass through, the front cover has a circular opening coaxial with the light outlet, and the end of the front cover away from the barrel extends along the direction perpendicular to the circular opening. An annular flange, the diameter of which is smaller than the diameter of the plane mirror. 6. The flashlight according to claim 1, characterized in that, the outer surface of the cylinder is also provided with a switch button and a focus button, the switch button is used to turn on and off the light source device, so The focusing button is used to control the voltage distributed to the first electrostrictive ring and the second electrostrictive ring.

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