JPWO2017090072A1 - Portable lighting fixtures - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable luminaire capable of adjusting the focus of light, wherein a disassembly / separation mechanism and a focus adjustment mechanism are independent, and the focus can be adjusted without changing the overall shape. A type lighting apparatus is provided. SOLUTION: A light irradiation unit, a light source holding unit, a power source holding unit, and a light source unit. A screw thread is cut on an inner peripheral surface of the light source holding unit, and a corresponding screw thread is provided. By rotating the power supply holding part that is provided on the outer peripheral surface of the light source part and screwed to the base part, the light source part is rotated inside the light source holding part while rotating (extending) in the longitudinal (axial) direction. In this configuration, the focus can be adjusted without retreating (reducing) and changing the overall shape. [Selection] Figure 2

Description

  The present invention relates to a portable lighting device that can adjust the focal point of light to be irradiated by adjusting the distance between the LED 76 of the light source unit 70 and a lens fitted in the irradiation port, and in particular. A screw thread 34 is provided on the inner peripheral surface (inner wall) of the light source holding portion, and a corresponding screw thread 74 is provided on the outer peripheral surface (outer wall) of the light source portion and screwed to engage and connect. By keeping the length of the portable lighting fixture constant, without changing the overall length, without loosening the threaded fastening of each part, the LED 76 that is the light source and the lens fitted to the irradiation port It is related with the portable lighting fixture which can adjust the focus of the light to irradiate by advancing (extension | stretching) and retreating (retraction | decompression) inside the light source holding | maintenance part.

  Portable lighting fixtures have been used for a long time under the names of flashlights, flashlights, etc., and in recent years the distance between the light source and the lens or reflector can be varied to adjust the focus of the emitted light. Various constructions of portable lighting fixtures have been developed.

  In order to make the distance between the lens fitted to the tip of the lighting fixture and the light source made of LED or the like variable, the head portion (the light irradiation unit 20 and the light source holding unit 30) is moved to the cylindrical gripping unit (power holding unit). Part 30 and bottom 50) are screwed and fastened and rotated to extend the head part from the cylindrical gripping part, or the head part is slidably attached to the cylindrical gripping part. A structure that adjusts the focal point of the irradiated light by changing the distance between the light source and the lens by moving forward and backward is employed.

  In any of the above-described focus adjustment methods, the head portion is extended from the cylindrical gripping portion, and the overall length of the luminaire before and after the focus adjustment is changed. There was a problem.

  In addition, in the structure in which the head portion and the cylinder gripping portion are released and the focus is adjusted while rotating and extracting the head portion (disassembly step), if the head portion and the cylinder are excessively rotated, There has been a problem in that the screw thread groove of the gripping part is completely removed and the head part falls off. For this reason, the power is turned off while the focus is in focus (the head part is extended), and the head part is lost due to loosening of screwing with the cylinder gripping part due to vibration during transportation or carrying. There was also a problem that would end up.

  In the structure where the head part is slidably fitted and attached so that the head part does not fall out of the cylindrical gripping part, the problem of the head part coming off and missing is solved, but in order to adjust the focus Since it is necessary to extend the head part from the cylinder gripping part, the packing fitted between the head part and the cylinder gripping part is worn out, and it is waterproof by repeated rotation and sliding.・ There was also a problem that the dustproof performance was significantly reduced.

  The thread groove used for screwing is configured by a thread groove close to a single thread that can generate sufficient pressure to be firmly screwed and fastened. A single screw is suitable for screw fastening because the pitch and lead are equal and the fastening force is large. However, since it moves only one pitch per rotation, the head part is rotated forward and backward to adjust the focal point. Had the problem of having to repeat the rotational movement. On the other hand, if a four-thread screw is used, it is possible to move the distance four times in one rotation, so that the focus can be easily adjusted. However, there is a problem that the screw fastening force of the core is reduced. It was.

  In order to improve the focus adjustment ease and waterproof / dustproof function of the portable lighting device, it is necessary to adjust the focus with a small rotational movement without advancing (extending) the head portion. Therefore, the internal structure (the distance between the light source and the lens) can be changed by turning the head part and the cylinder gripping part without making the disassembly / separation mechanism (operation) and the turning movement for focus adjustment interlock. Therefore, it is required to develop a structure that can change the focal point of the irradiation light.

  Therefore, it is a portable lighting fixture that can adjust the focal point of the irradiated light, without changing the overall shape (outer shape) of the lighting fixture before and after the focus adjustment (head part) It is possible to maintain the waterproof and dustproof function for a long period of time, and to disassemble and separate the head part and the cylindrical gripping part and the focus adjustment mechanism. In addition, there has been a demand for the development of a portable lighting device that can easily adjust the focus of light with a small amount of rotation.

Special table 2012-515424 gazette

  In order to solve the above-described problems, an object of the present invention is a portable lighting device capable of adjusting the focus by changing the distance between the position of light emitted from the light source and the lens mounted on the irradiation port. A screwing mechanism provided on the inner peripheral surface (inner wall) of the light source holding unit 30 with the disassembly / separation mechanism of the head portion and the cylinder gripping part and the screwing rotation mechanism for adjusting the focal point being made independent. By screwing the screw thread 34 and the screw thread 74 of the light source unit 70 and rotating the light source holding unit 30, the light source unit 70 is advanced (stretched) and retracted (retracted) inside the light source holding unit 30. An object of the present invention is to provide a portable lighting fixture that can adjust the focus of light without changing the outer shape of the lighting fixture itself.

  To achieve the above object, a portable lighting device according to the present invention includes a light source unit (70) including an LED, a light irradiation unit (20) including an irradiation port (25) fitted with a lens, and the light. A light source holding part (30) attached to the base of the irradiation part (20), a light source unit (60) stored in the light source holding part (30), and a power source for supplying power to the light source unit (60) ( 110), a power supply holding part (40) having a cylindrical shape that stores the power supply (110) and is rotatably fitted to the light source holding part (30), and a bottom part (50). The light source unit (60) includes a light source unit (70) that emits irradiation light and a base unit (80) to which the power supply holding unit (40) is fixedly connected. 70) is provided with one or a plurality of convex fitting projections (72), and the base portion (80) is one or a plurality of concave shapes corresponding to the fitting projections (72). The fitting recess (82) is cut and The fitting convex part (72) is adapted to move forward (extend) / retreat (retract) in the light source holding part (30) in response to the rotation of the base part (80). The light source holding portion (30) is configured to be slidably fitted into the fitting recess (82), and the threaded screw thread (34) is cut on the inner peripheral surface (inner wall), and the light source The part (70) has an outer peripheral surface (outer wall) with a screw thread (74) having a shape corresponding to the screw thread (34), and the entire length of the portable lighting device is reduced. While keeping constant, the light source unit (70) rotates in response to the rotation of the power supply holding unit (40) and moves back and forth between the irradiation port (25) inside the light source holding unit (30). Then, the light source unit (60) is connected to the screw thread (34) of the light source holding part (30) and the above-mentioned light source unit (60) so that the distance between the light source and the lens can be changed and the focal point of the irradiated light can be appropriately changed. Screw the thread (74) of the light source (70) Stores movably to the light source holding unit (30) is configured such that the power supply holding section (40) and fixedly connected to said base portion (80).

  The light source holding part (30) has a configuration in which a ring-shaped stopper (100) is provided between the irradiation port and the light source unit in order to prevent the light source unit (60) from falling off.

  The light source of the light source unit (70) is configured by LEDs.

Since the portable lighting fixture according to the present invention has the configuration as described in detail above, it has the following effects.
1. A screw thread 74 is provided on the outer peripheral surface (outer wall) of the light source unit 70 fitted to the base unit 80, and the light source unit is formed by the screw thread 34 provided on the inner peripheral surface of the corresponding light source holding unit 30. By screwing and rotating 70, only the light source unit 70 can be advanced (stretched) or retracted (retracted) inside the light source holding unit 30. Since only the light source unit 70 is rotated inside the light source holding unit 30 to move back and forth, the light source holding unit 30 and the power source holding unit 40 can be disassembled / separated without changing the external shape of the portable lighting fixture. This is a structure capable of adjusting the focal point of the irradiated light without performing the above.

2. By providing the stopper 100 at a substantially distal end portion of the light source holding unit 30, it is possible to prevent the lens 27 from being damaged due to excessive extension (advance) of the light source unit 70. Further, by extending the light source part 70 to the position where it contacts the stopper 100 as much as possible, when the power supply holding part 40 is screwed and fastened to the base part 80, it becomes a stopper for preventing the base part 80 from rotating. Therefore, the power supply holding unit 40 and the base unit 80 can be firmly coupled.
3. Since the light source of the light source unit 70 is made of an LED, it has low power consumption, a long life, and has an impact resistance, and can be used for a long period of time.

The front view of the portable lighting fixture which concerns on this invention A-A 'sectional view of a portable lighting fixture according to the present invention The expanded sectional view of the portable lighting fixture concerning this invention The exploded front view of the state which light source unit 60 of the portable lighting fixture concerning the present invention retracted (decompression) The exploded front view of the state which light source unit 60 of the portable lighting fixture concerning the present invention advanced (stretched) The disassembled perspective view of the light source part 70 of the portable lighting fixture which concerns on this invention The disassembled perspective view of the base part 80 of the portable lighting fixture which concerns on this invention

Hereinafter, the portable lighting fixture concerning this invention is demonstrated in detail based on the Example shown on drawing.
The portable lighting device 10 according to the present invention includes a light irradiation unit 20, a light source holding unit 30, a power source holding unit 40, a bottom 50, a light source unit 60, and a power source 110.
The light irradiation unit 20 includes an irradiation port 25, a light source holding unit screwing groove 26, and a lens 27.
The light source holding unit 30 includes a stopper screwing groove 32, a screwing thread 34, and a light irradiation part screwing groove 36.
The power holding unit 40 includes a bottom screwing groove 42 and a base part screwing groove 46.
The bottom portion 50 includes a base screwing groove 52 of a power supply holding portion and a power switch 54.
The light source unit 60 includes a light source unit 70 and a base unit 80.
The light source unit 70 includes a fitting convex portion 72, a screw thread 74, and an LED 76.
The base portion 80 includes a fitting recess 82 and a front end screwing groove 86 of the power holding portion.
The stopper 100 has a configuration in which a stopper outer peripheral threading groove 102 is provided.

  FIG. 1 is a front view of a portable lighting device according to the present invention, and the overall shape is changed in a state in which a light irradiation unit 20, a light source holding unit 30, a power supply holding unit 40, and a bottom 50 are assembled. It is possible to adjust the focus of the light without causing it.

  FIG. 2 is a cross-sectional view of the portable lighting device according to the present invention, taken along the line A-A ′, showing the internal structure of the portable lighting device. The light source portion 70 is retracted (retracted), and the fitting convex portion 72 is completely fitted in the fitting concave portion 82 of the base portion 80.

  FIG. 3 is an enlarged cross-sectional view of the portable lighting fixture A-A ′ and indicates the light source unit 60 in more detail. As in FIG. 2, the light source unit 70 is shown in a completely retracted (degenerated) state.

  FIG. 4 shows only the light source unit 60, and shows a state where the light source part 70 is retracted (retracted) and the fitting convex part 72 is completely fitted in the fitting concave part 82 of the base part 80. .

  FIG. 5 shows a state in which the light source unit 60 rotates and the fitting convex portion 72 of the light source unit 70 moves forward (extends) from the fitting concave portion 82 of the base portion 80 and comes out.

  FIG. 6 is an exploded perspective view showing a state in which the thread 74 is cut on the outer peripheral surface of the light source unit 70. The screw thread 74 is screwed in correspondence with the screw thread 34 provided on the inner peripheral surface (inner wall) of the light source holding part 30, and the light source part 70 is advanced (stretched) / retracted (retracted) by rotation. The configuration is shown.

  FIG. 7 is an exploded perspective view of the base portion 80. A fitting concave portion 82 is provided in the upper portion of the hollow cylindrical base portion 80, and the fitting convex portion 72 is fitted in the fitting concave portion 82. FIG. The structure which matches is shown.

  In the portable lighting device 10, the light irradiation unit 20 at the tip and the light source holding unit 30 are engaged to form the upper half (head portion) of the lighting device, and the power holding unit 40 and the bottom 50 are engaged to form the lower half. (Chassis gripping part) is formed, and the upper half (head part) and the lower half (housing gripping part) are firmly screwed through the base 80 of the light source unit 60 built in the light source holding part 30. To form a portable lighting fixture.

  The light irradiation unit 20 is a distal end portion of a portable lighting device including an irradiation port 25, a light source holding unit screwing groove 26, and a lens 27. An irradiation port 25, which is a wide-diameter opening, is provided at the tip of the light irradiation unit 20, and is configured to transmit light by transmitting and reflecting light from the light source unit 70.

  The irradiation port 25 is a wide-diameter opening provided at the tip of the light irradiation unit 20, and illuminates the object by irradiating light from the LED 76 of the light source unit 70 onto a lens fitted to the irradiation port 25. It is a configuration that makes it possible.

  The light source holding part screwing groove 26 is a spiral groove provided at the base of the light irradiation part 20 and has a shape corresponding to the light irradiation part screwing groove 36 of the light source holding part 30. 20 and the light source holding part 30 are screwed and fastened.

  The lens 27 is a lens that fits into the irradiation port 25 that is an opening provided at the tip of the light irradiation unit 20, and refracts or converges the light from the LED 76 of the light source unit 70. The lens 27 is fixedly attached to the light irradiation unit 20, and the focus of the light to be irradiated can be adjusted by moving the light source unit 70 closer to or away from the light source unit 70.

  In this embodiment, the light source holding part 30 is formed of a cylindrical body, and is provided with a stopper screwing groove 32, a screw thread 34, and a light irradiation part screwing groove 36 provided on the inner peripheral surface (inner wall) thereof. It has been. The light irradiation part 20 is screwed and fastened to the tip part, and the base part 80 of the light source unit 60 built in the light source holding part 30 and the power supply holding part 40 are screwed and fastened to form a portable lighting fixture.

  The stopper screwing groove 32 is a spiral groove provided on the inner peripheral surface (inner wall) at the substantially distal end of the light source holding unit 30, and the stopper outer peripheral screwing groove 102 provided on the outer peripheral surface (outer wall) of the stopper 100. It is the structure which screws together corresponding to.

  The screw thread 34 is a spiral groove provided from approximately half the inner peripheral surface (inner wall) of the light source holding unit 30 toward the tip, and is a screw provided on the outer peripheral surface (outer wall) of the light source unit 70. It is configured to be screwed corresponding to the combined thread 74. When the power supply holding unit 40 is fixed and the light source holding unit 30 is rotated in the counterclockwise direction, the light source unit 70 moves forward (extends) inside the light source holding unit 30 by the above screwing screw structure. In accordance with the rotation of the power supply holding unit 40, the light source unit 70 is configured to advance (extend) until it contacts the stopper 100. On the contrary, even if the light source holding unit 30 is fixed and the power supply holding unit 40 is rotated in the clockwise direction, the light source unit 70 similarly moves forward (extends). The light source unit 70 is configured to retreat (degenerate) by rotating each unit in the direction opposite to the rotation.

  The light irradiation part screwing groove 36 is a spiral groove provided on the inner peripheral surface (inner wall) at the tip of the light source holding part 30, and has a shape corresponding to the light source holding part screwing groove 26 of the light irradiation part 20. The light source holding unit 30 and the light irradiation unit 20 are screwed and fastened.

  The power supply holding part 40 includes a bottom screwing groove 42 and a base part screwing groove 46, and a storage battery serving as a power source such as a rechargeable battery or a dry battery is provided inside. A bottom screwing groove 42 is provided at the tip of the power supply holding unit 40, and a base part screwing groove 46 is provided at the base.

  The bottom screwing groove 42 is a spiral groove provided on the inner peripheral surface (inner wall) of the base of the power holding unit 40, and the base screwing groove 52 of the power holding unit provided on the outer peripheral surface of the tip of the bottom 50. And the power supply holding unit 40 and the bottom 50 are firmly screwed and fastened.

  The base screwing groove 46 is a spiral groove provided on the inner peripheral surface (inner wall) at the tip of the power holding unit 40, and is provided on the outer peripheral surface of the convex portion protruding from the base of the base unit 80. The power supply holding portion is configured to be screwed in correspondence with the front end screw groove 86, and the power supply holding portion 40 and the base portion 80 are firmly screwed together.

  The bottom part 50 includes a base screwing groove 52 of a power supply holding part provided at the tip part and a power switch 54 provided at the base part. A switch mechanism for turning ON / OFF the power supplied from the power supply provided in the power supply holding unit 40 is provided. The power supply is controlled by an energization / shut-off mechanism used in conventional flashlights.

  The base screwing groove 52 of the power supply holding part is a spiral groove provided on the outer peripheral surface of the tip of the bottom part 50, and is screwed corresponding to the bottom screwing groove 42 provided in the power supply holding part 40, In this configuration, the bottom 50 and the power supply holding unit 40 are firmly screwed together.

  The power switch 54 is a switch that controls supply of electric power provided at the base of the bottom 50. Although the push button switch is used in this embodiment, the present invention is not limited to the embodiment shown in the drawing, and a conventional switch mechanism such as a rotary type or a slide type can be employed.

  The light source unit 60 includes a light source unit 70 and a base unit 80, and is a mechanism that controls the function of adjusting the focus of light according to the present invention. The light source unit 60 is firmly connected to the power supply holding unit 40 by the front end screwing groove 86 of the power supply holding unit provided at the base of the base unit 80 and the base unit screwing groove 46 provided at the front end of the power supply holding unit 40. Fasten with screws.

  The light source unit 70 includes a fitting convex portion 72, a screw thread 74, and an LED 76. Light that is diffused and converged by a lens by moving forward (stretching) and retreating (retracting) inside the light source holding unit 30. It is the structure which adjusts the focus. Two elongate fitting projections 72 are erected symmetrically from the periphery of the bottom of the light source unit 70 in the base direction, and the fitting projections 72 are fitted into fitting recesses 82 provided in the base portion 80. To do. Further, a screw thread 74 is provided on the outer peripheral surface of the light source unit 70 and is configured to be screwed with a screw thread 34 provided on the inner peripheral surface (inner wall) of the corresponding light source holding unit 30. The light source part 70 is not configured to be screwed with the power supply holding part, but is fitted to the base part 80 via the fitting convex part 72 and the fitting concave part 82. In addition, the light source unit 70 is screwed with the light source holding unit 30 as described above, but only the grooves are engaged with each other, and is screwed to firmly fix any member. Instead, the light source holding unit 30 or the power supply holding unit 40 is configured to advance (extend) or retract (retract) in the longitudinal (axial) direction in response to the rotation of the light source holding unit 30 or the power supply holding unit 40.

  The fitting convex part 72 is an elongated rectangular bar-like protrusion provided at the base of the light source part 70 and has a shape corresponding to the fitting concave part 82 of the base part 80, and the light source part 70 is completely retracted (degenerated). ), The entire fitting projection 72 is fitted into the fitting recess 82. When the light source unit 70 rotates and starts moving forward (stretching), the fitting convex portion 72 slides in the axial (vertical) direction from the fitting concave portion 82 and is gradually pulled out from the fully fitted state in the concave portion. In a state where the light source unit 70 is completely advanced (stretched), the light source unit 70 is formed to have a length that does not come off the recess. The fitting convex part 72 should just be able to be slid back and forth in the vertical direction while rotating the light source part 70 according to the axial movement distance of the light source holding part 30 or the base part 80, In the present embodiment, it is formed of two rod-shaped protrusions, but it is also possible to form one or more plural convex portions.

  The screw thread 74 is a spiral groove cut on the outer peripheral surface (outer wall) of the light source unit 70, and is connected to the helical screw thread 34 provided on the inner peripheral surface (inner wall) of the light source holding unit 30. Screw together in the corresponding state. In this structure, the light source holder 70 is moved forward (stretched) inside the light source holder 30 by rotating the light source holder 30 counterclockwise with the power source holder 40 firmly screwed to the base 80 fixed. Further, the light source unit 70 can be retracted (reduced) by rotating the light source holding unit 30 clockwise. The light source unit 70 advanced by the screw thread 74 (and the screw thread 34) stops moving forward when the tip abuts against the stopper 100. When the light source unit 70 is moved backward, the backward movement is stopped when the bottom of the light source unit 70 contacts the tip of the base unit 80.

  The screw thread 74 (and the screw thread 34) is used only for the operation of moving the light source unit 70 forward and backward. Since it is not the screwing for screwing and fastening each part firmly like other screwing parts, it is possible to use a multi-threaded screw. Since the screw generally used is a single thread and is a single spiral in one pitch, the member can be moved in the axial direction only by one pitch per rotation. Portable lighting fixtures that are disassembled and assembled by human hands without the use of tools cannot easily increase the coupling pressure. Threads (4 thread etc.) are not suitable. On the other hand, since the spiral groove of the thread 74 and the threaded thread 34 that is not used for engagement can be a four-thread screw or the like, it is four times longer in one rotation than a single thread. Can be moved in the axial direction. Since it can be moved forward and backward greatly with a slight rotation, it is possible to easily and quickly adjust the focus of light.

  LED76 is a light-emitting body used as the light source of the portable lighting fixture which concerns on this invention. Although this embodiment is equipped with only one LED, it is possible to equip a plurality of LED light emitting elements, and it is also possible to employ other light sources instead of LEDs. It is not limited to equipment.

  The base portion 80 includes a fitting concave portion 82 and a front end screwing groove 86 of the power supply holding portion, and is configured to rotate together with the power supply holding portion 40 by being firmly screwed to the power supply holding portion 40. . When the power supply holding unit 40 is screwed into the base unit 80 in a state where the light source unit 60 and the light source holding unit 30 are assembled, the base unit 80 is held by the frictional resistance of each unit. The leading end screwing groove 86 of the power supply holding part of the part 80 and the base part screwing groove 46 of the power supply holding part 40 start screwing. When the screwing pressure exceeds the screwing pressure of the screw thread 74 and the screw screw thread 34, the base 80 starts to rotate in the tightening direction (right rotation) together with the power supply holding unit 40. At that time, the light source unit 70 starts moving forward, and after the tip of the light source unit 70 comes into contact with the stopper 100 and stops, the power supply holding unit 40 is screwed into the base unit 80 with further pressure, whereby the base unit 80 The power supply holding unit 40 is firmly screwed to the main body.

  When the power supply holding unit 40 is removed from the base unit 80, the light source unit 70 is retracted (retracted) to a position where the base of the light source unit 70 contacts the tip of the base unit 80, and the rotation of the light source unit 70 is completely sealed. Thereafter, the power supply holding unit 40 can be disassembled and detached from the base unit 80 by further applying pressure and rotating the power supply holding unit counterclockwise.

  The stopper 100 is composed of an annular ring body, and has a configuration in which a stopper outer peripheral threading groove 102 is provided on the outer peripheral surface. The stopper 100 is formed so as to be screwed and fastened to an inner peripheral surface (inner wall) at a substantially distal end of the light source holding unit 30, and the stopper 100 moves forward (extends) while rotating from the light source unit 60. It is provided to stop the light source unit 70 from advancing (extending) when the tip abuts against the bottom of the stopper 100. By stopping the advancement (extension) of the light source unit 70, damage to the lens 27 due to excessive advancement is prevented, and the base unit 80 and the power supply holding unit 40 are firmly screwed and fastened as described above. It is possible.

  The stopper outer peripheral threading groove 102 is a spiral groove cut on the outer peripheral surface of the stopper 100, and is formed in the stopper threading groove 32 provided on the inner peripheral surface (inner wall) of the substantially distal end portion of the light source holding unit 30. It is configured to be screwed correspondingly. It is a member for stopping the light source part 70 which tries to move forward with the pressure of helical rotation.

  The power supply 110 is a power supply member that emits light from an LED built in the power supply holding unit. In this embodiment, a rechargeable secondary battery is mounted. However, various conventional portable small batteries such as a primary battery such as a dry battery can be used according to the size and application.

  The portable lighting fixture according to the present invention has a structure in which the light source unit 70 of the light source unit 60 is advanced (stretched) / retracted (retracted) in the axial direction as the light source holding unit 30 rotates to adjust the focus of light. Therefore, the configuration of the exterior of the lighting fixture is not changed before and after the focus adjustment. Therefore, since the length of the lighting fixture can be kept constant at all times, it is not bulky when stored in and taken out from a case or a bag, and can be handled smoothly. Further, since the focus is adjusted only by the rotation of the internal member, the power can be turned off and stored and carried with the focus kept at the adjusted position.

  Since the portable lighting fixture according to the present invention has a structure in which a solid screw fastening of each part used for the assembly work of the main body and a mechanism for adjusting the focus are provided independently, the head portion is adjusted by the focus adjustment operation. Can be prevented from falling out and missing. The mechanism that adjusts the focal point by separating the distance between the light source and the lens by using the disassembling operation to rotate the head part and remove it from the cylinder gripping part has caused excessive rotation. This is a solution to the problem that the head part falls off after passing.

  Since the portable lighting fixture having the structure according to the present invention can adjust the focus of light without moving the head portion (the light source holding unit 30 and the light irradiation unit 20) back and forth, The packing provided in the slight clearance of the fitting part of the cylinder gripping part is configured not to be exposed to the wear of the longitudinal motion. For this reason, the head portion does not slide back and forth, and only rotational movement is always performed at a fixed position, so that the burden on the sealing material can be greatly reduced. This makes it possible to significantly extend the service life of the sealing material compared to conventional portable lighting fixtures that can be adjusted in focus, and to prevent wear and deterioration, making it waterproof and dustproof. It is possible to provide a portable lighting device with high height.

  Since the screwing part for assembly and the screwing part for focus adjustment are provided as separate mechanisms, it is possible to employ a multi-thread screw that is not suitable for assembling and joining members to the focus adjustment mechanism. . By using a multi-threaded screw such as a four-threaded screw, it is possible to move a distance four times that of a normal screw by one rotation. Since the focus can be adjusted four times as fast as a normal screw, quick and easy focus adjustment can be realized. In addition, since the distance of the rotational movement for focus adjustment can be shortened, the wear of the sealing material such as packing can be further reduced. In this embodiment, it is possible to move forward (stretch) and retreat (degenerate) by a length of about 1 cm by half rotation (180 degrees).

DESCRIPTION OF SYMBOLS 10 Portable lighting fixture 20 Light irradiation part 25 Light emission port 26 Light source holding part screwing groove 27 Lens 30 Light source holding part 32 Stopper screwing groove 34 Screw thread 36 Light irradiation part screwing groove 40 Power supply holding part 42 Bottom screwing Groove 46 Base part threading groove 50 Bottom part 52 Power source holding part base threading groove 54 Power switch 60 Light source unit 70 Light source part 72 Fitting convex part 74 Thread 76 LED
80 Base portion 82 Fitting recess 86 Power supply holding portion distal end screwing groove 100 Stopper 102 Stopper outer peripheral screwing groove 110 Power supply

Claims (3)

A light source part (70) provided with an LED, a light irradiation part (20) provided with an irradiation port (25) fitted with a lens, and a light source holding part (30) attached to the base of the light irradiation part (20) A light source unit (60) stored in the light source holding unit (30), a power source (110) for supplying power to the light source unit (60), and storing the power source (110) to hold the light source In the portable lighting fixture consisting of a cylindrical power supply holding part (40) that is rotatably fitted to the part (30), and a bottom part (50),
The light source unit (60) includes a light source part (70) that emits irradiation light and a base part (80) to which the power supply holding part (40) is fixedly connected, and the light source part (70) is one or more. A convex fitting convex portion (72) made up of, and the base portion (80) is one or a plurality of concave fitting concave portions (82 corresponding to the fitting convex portion (72). ), And the fitting so that the light source part (70) moves forward (extends) and retreats (retracts) within the light source holding part (30) in response to the rotation of the base part (80). In the configuration in which the convex portion (72) is slidably fitted into the fitting concave portion (82),
The light source holding part (30) has a screw thread (34) cut on the inner peripheral surface (inner wall), and the light source part (70) has the screw thread on the outer peripheral surface (outer wall). (34) has a thread (74) with a shape that engages with the thread,
While keeping the entire length of the portable lighting fixture constant, the light source part (70) rotates in response to the rotation of the power supply holding part (40), while inside the light source holding part (30). The light source unit (60) is moved back and forth between the irradiation port (25), and the light source unit (60) can be changed appropriately by changing the distance between the light source and the lens. ) Screw thread (34) and the light source part (70) thread (74) are screwed together and movably stored in the light source holding part (30), and the power supply holding part ( 40) A portable lighting device, wherein 40) is fixedly connected to the base portion (80).   The light source holding part (30) is characterized in that a ring-shaped stopper (100) is provided between the irradiation port and the light source unit in order to prevent the light source unit (60) from falling off. The portable lighting fixture according to 1. The portable light fixture according to claim 1, wherein the light source of the light source unit (70) is an LED.

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