CN215569863U

CN215569863U - Rotary focusing type lighting device

Info

Publication number: CN215569863U
Application number: CN202120297320.3U
Authority: CN
Inventors: 李清忠; 陈文好; 许杰; 林良通
Original assignee: Led Lenser Corp Ltd
Current assignee: Led Lenser Corp Ltd
Priority date: 2020-12-31
Filing date: 2021-02-02
Publication date: 2022-01-18
Anticipated expiration: 2031-02-02

Abstract

The present disclosure describes a rotary focus illumination device comprising a light emitting assembly secured to a barrel; a light reflecting cup; the reflecting cup seat is provided with a guide hole so as to accommodate the guide post fixed in the cylinder body, the reflecting cup is fixedly arranged in the reflecting cup seat, and the guide post extends along the front-back direction; the middle section is sleeved on the cylinder body and is rotationally connected with the cylinder body; the adjusting ring is sleeved on the cylinder and is rotationally connected with the cylinder; a guide mechanism is arranged in the inner wall of the focusing ring and the outer wall of the reflector cup seat, the guide mechanism is used for driving the reflector cup seat to move along the guide post when the middle section rotates, and a limiting mechanism used for limiting the forward movement and the backward movement of the focusing ring relative to the cylinder body is arranged between the cylinder body and the focusing ring; a clamping structure is arranged between the focusing ring and the middle section, and when the middle section rotates relative to the barrel body through the clamping structure, the focusing ring and the middle section rotate together; or the focusing ring and the middle section are fixedly connected or integrally formed, so that when the middle section rotates relative to the cylinder body, the adjusting ring and the middle section rotate together.

Description

Rotary focusing type lighting device

Technical Field

The present disclosure relates to the field of optical devices, and more particularly to lighting devices.

Background

Optical devices, such as lighting devices, lenses, etc., typically require focal length adjustment. For lighting devices, such as flashlights, headlights, searchlights, spot lights, etc., it can be applied to emergency lighting, outdoor exploration, decoration, etc., and generally realizes a floodlight or spotlight effect by adjusting a distance between a reflective lens and a luminous body.

In the existing focusing device, there are two ways to adjust the focal length, including a push-pull type structure and a rotary type structure. Wherein, push-pull type structure is through allowing the user to stretch focusing device by hand and come to remove the luminous body for the reflection of light lens, and it can not in time exhaust, can not realize the waterproof performance of higher level. The existing rotary focusing device realizes the movement of a luminous body relative to a reflective lens through a thread structure.

For example, CN205640751U discloses a rotary stepless optical focusing system, which includes a focusing ring in threaded connection with a battery compartment, a lamp holder assembly including a light emitter is fixed to the battery compartment, and the focusing ring moves in an axial direction relative to the lamp holder assembly by the rotation of the focusing ring on the battery compartment, and thereby drives a total reflection focusing lens to move relative to the light emitter, so as to realize a light focusing or floodlighting effect. The focusing ring and the battery bin are sealed by the aid of the silica gel damping adjusting collar ring to generate a sealing position which moves axially relative to each other, so that dustproof and waterproof performances are enhanced.

However, the inventor of the present application has recognized that, in the focusing system described above, due to the axial movement of the focusing ring relative to the battery compartment during focusing, the internal pressure changes during focusing and affects the sealing performance, and the waterproof performance achieved is not sufficient for underwater use.

SUMMERY OF THE UTILITY MODEL

To at least partially overcome the above-mentioned problems of the prior art, the present disclosure provides a rotary focus lighting fixture in which the housing (middle segment) at the focus fixture does not move axially relative to the barrel during focusing, enhancing sealing.

According to an aspect of the embodiment of the present disclosure, a rotary focusing type lighting device is provided, which includes a front cover and a barrel, wherein a control circuit and a power supply are arranged in the barrel, and the rotary focusing type lighting device further includes:

a light emitting assembly fixed to the barrel;

a light reflecting cup;

the reflecting cup seat is provided with a guide hole for accommodating a guide post fixed in the cylinder body, the reflecting cup is fixedly arranged in the reflecting cup seat, and the guide post extends along the front-back direction;

the middle section is sleeved on the barrel and is rotationally connected with the barrel;

the focusing ring is sleeved on the barrel and is rotationally connected with the barrel;

a guide mechanism is arranged in the inner wall of the focusing ring and the outer wall of the reflector cup seat, the guide mechanism is used for driving the reflector cup seat to move along the guide post when the middle section rotates, and a limiting mechanism used for limiting the forward movement and the backward movement of the focusing ring relative to the cylinder body is arranged between the cylinder body and the focusing ring;

a clamping structure is arranged between the focusing ring and the middle section, and when the middle section rotates relative to the barrel body through the clamping structure, the focusing ring and the middle section rotate together; or the focusing ring and the middle section are fixedly connected or integrally formed, so that when the middle section rotates relative to the cylinder body, the adjusting ring and the middle section rotate together.

In some embodiments, the middle section, the barrel and the front cover cooperate with each other to enclose the focusing ring, the reflective cup holder and the reflective cup.

In some embodiments, the middle section is limited to move forwards or backwards relative to the barrel by the cooperation of the focusing ring and the barrel.

In some embodiments, the limiting mechanism comprises a first flange circumferentially disposed on the barrel, and a second flange circumferentially disposed on the focus ring, forward movement of the focus ring relative to the barrel being limited by the first flange and the second flange, a rear end of the second flange abutting against the barrel to limit rearward movement of the focus ring relative to the barrel;

in some embodiments, the restraining mechanism includes a plurality of second flanges circumferentially distributed on the focus ring, a gap being present between the plurality of second flanges;

in some embodiments, the second flange includes a connecting arm and a first protrusion protruding inward, one end of the connecting arm is connected to the focus ring, the other end of the connecting arm is connected to the first protrusion, the focus ring is limited from moving forward relative to the barrel by the cooperation of the first protrusion and the first flange, and a rear end of the first protrusion abuts against the barrel to limit the focus ring from moving backward relative to the barrel.

In some embodiments, the middle section is limited from moving forward or backward relative to the barrel by cooperation of the middle section with the second flange and the barrel;

in some embodiments, the second flange further comprises a second protrusion protruding outward, the second protrusion being provided at the other end of the connecting arm; the middle section is limited to move forwards or backwards relative to the barrel through the matching of the second lug and the barrel;

in some embodiments, the front end surface of the outer side surface of the second projection expands outward from front to back.

In some embodiments, the snap structure includes a tab disposed on the focus ring and a notch disposed on the middle section.

In some embodiments, the barrel is provided with a heat sink surrounding the light emitting device, and the first flange and the guiding post are disposed on the heat sink.

In some embodiments, a waterproof ring is arranged between the middle section and the barrel.

In some embodiments, the guiding mechanism includes a guiding protrusion disposed on the focusing ring, and a guiding groove disposed on the reflector holder, and the reflector holder is driven to move along the guiding post by the cooperation of the guiding groove and the guiding protrusion when the middle segment rotates.

In some embodiments, the front cover is provided with a glass cover.

The rotary focusing type illuminating device has the advantages that the reflecting cup and the reflecting cup seat move relative to the luminous body during focusing, so that focusing is realized, and meanwhile, the middle section does not move relative to the axial direction of the barrel, so that the sealing performance is enhanced.

Drawings

Fig. 1 illustrates an exploded view of a lighting device according to some embodiments of the present disclosure;

FIG. 2 shows a cross-sectional view of the lighting assembly of FIG. 1 with the reflector cup holder in a flood position;

FIG. 3 shows a cross-sectional view of the lighting device of FIG. 1 with the reflector cup holder in a spot position;

FIG. 4 illustrates an isolated perspective view of a heat sink of a lighting device according to some embodiments of the present disclosure;

FIG. 5 illustrates a perspective view of a heat sink and focus ring of a lighting device according to some embodiments of the present disclosure;

FIG. 6 illustrates a perspective view of a heat sink, focus ring, and reflector cup holder of a lighting device according to some embodiments of the present disclosure;

fig. 7 shows an enlarged view of region a in fig. 2.

Detailed Description

The following provides a more detailed description of the rotary focusing illumination apparatus of the present disclosure with reference to the drawings and the detailed description. Advantages and features of the present invention will become apparent from the following detailed description and claims. It is noted that the drawings are in greatly simplified form and that non-precision ratios are used for convenience and clarity only to aid in the description of the embodiments of the utility model.

Referring now to fig. 1-3, a rotary focus illumination device 100 according to some embodiments of the present disclosure is described, including a barrel 110 and a front cover 111, a glass cover 113 secured to the front cover 111; and a light emitting assembly 120 and a focusing assembly 130. Optionally, the barrel 110 is provided with a rear cover 112. It should be understood that although in some embodiments of the present disclosure, the front cover 111 is provided with a glass cover 113 to allow light to shine through the front cover 111, in other embodiments, other transparent materials may be provided on the front cover 111 to allow light to pass through, such as transparent plastic or other similar structures, or openings may be provided on the front cover 111 to allow light to pass directly.

The barrel 110 may be in the form of a cylinder, prism, or any other regular or irregular shape and defines an accommodation space to accommodate the power source 114, the control circuit 115, and the like. The power source 114 may be implemented as a dry cell battery or a rechargeable battery including any one of a nickel metal hydride battery, a lithium ion battery, a lithium polymer battery, etc., preferably as a cylindrical lithium battery, such as 18650 lithium battery. The control circuit 115 is connected to the light emitting assembly 120, the power supply 114, etc., and may be implemented in the form of a PCB and used to control, for example, switching, blinking, adjusting brightness, temperature measurement, current limiting, charging, etc., of the light emitting assembly 120.

A button 116 may also be provided in the wall of the barrel 110. The control circuit 115 may be connected to the button 116 to enable or disable certain functions based on the difference in actions performed by the user on the button 116, such as single click, double click, long press, short press, etc. actions on the button 116.

Light emitting assembly 120 is fixedly attached to one end of barrel 110 and includes a light emitter 121, a light emitter cover 122, and a heat sink 123 disposed around light emitter 121 and light emitter cover 122. The light emitter 121 may be implemented as any one of an LED lamp, an incandescent lamp, a tungsten halogen lamp, preferably as an LED lamp, e.g. a white LED lamp. A light cover 122 is disposed around the light 121 for fixing the light 121.

Referring to FIG. 4, an isolated view of the heat sink 123 is shown. The heat sink 123 is disposed around the light 121 and the light cover 122, and serves to conduct heat generated during the operation of the light 121 to an external space. Preferably, the heat sink 123 is provided with a post 1231 therein, and the light emitter 121 is positioned on the top of the post 1231 and contacts therewith to conduct heat to the heat sink 123. A through hole 1232 is provided in the bottom surface of the heat sink 123. The shape of the through hole 1232 may be implemented in any suitable shape including, but not limited to, circular, oblong, oval, rectangular, trapezoidal, polygonal, or any other regular or irregular shape to pass through a cable or the like. The top surface of the heat sink 123 may be circumferentially provided with a first flange 1233. The first flange 1233 preferably extends inwardly and/or outwardly in a radial direction (i.e., perpendicular to the Y-Y direction in fig. 2). The first flanges 1233 are preferably evenly spaced apart. For example, in the embodiment shown in fig. 4, a total of three first flanges 1233 are provided, spaced 120 ° apart from one another. As shown in fig. 7, the first flange 1233 extends inwardly and outwardly in a radial direction, wherein an inner portion of the first flange 1233 abuts and secures the light cover 122. In the embodiment according to the present disclosure, the heat sink 123 does not move during the focusing process, and does not affect the magnitude of the current supplied to the reflector 121.

The focusing assembly 130 includes a middle segment 131, a focusing ring 132, a reflective cup holder 133, a reflective cup 134, and a guide post 135.

Guide post 135 is secured within rotary focus lighting fixture 100, and may be secured to heat sink 123, for example, and preferably to first flange 1233 of heat sink 123, as shown in FIG. 4. By way of example, the guide posts 135 may be implemented as three guide posts, i.e., one guide post 135 is disposed on each first flange 1233, with the guide posts 135 spaced apart from each other (e.g., evenly spaced apart by 120 °). It should be understood that the guide posts 135 may also be implemented in other numbers, such as one, two, or more than three guide posts, and that the guide posts 135 may be evenly or unevenly spaced from one another. The guide post 135 is shown as extending in an axial direction (i.e., the Y-Y direction in fig. 2), however it may also be configured to extend at an angle to the axial direction. It should be understood that the guide posts 135 may be fixed to other components or locations of the rotationally focused illumination device 100 and their cross-sectional shapes may vary and are not limited to the particular number, orientations, mounting locations, and cross-sectional shapes shown in the figures.

The middle segment 131 is implemented in a cylindrical form and is sleeved on the cylinder 110. For example, the barrel 110 is provided with a recess 117 at an end near the light emitting assembly 120 such that the middle segment 131 covers the recess 117. And optionally the cartridge may also be provided with a first circumferential groove 118 for receiving a waterproof ring, such as an O-ring, to preferably achieve a water tight seal. The waterproof ring is pressed into the first circumferential groove 118 by the middle section 131, thereby sealing the radial gap between the middle section 131 and the barrel 110 to prevent external water or other substances from entering the interior of the rotary focus illuminator 100. The front cover 111 is connected to the middle section 131 via a screw thread, and similarly a second circumferential groove and a watertight ring accommodated therein may also preferably be provided between the front cover 111 and the middle section 131 for sealing.

In addition, the middle section 131, the barrel 110, the front cover 111 and the glass cover 113 are mutually matched to wrap the focusing ring 132, the reflective cup holder 133 and the reflective cup 134, so that the focusing ring 132, the reflective holder 133 and the reflective cup 134 are isolated from the outside to improve the sealing performance of the lighting device.

Referring to fig. 5 and 6, fig. 5 shows focus ring 312 and heat sink 123, and fig. 6 shows focus ring 132, heat sink 123, and reflector cup holder 133. A guide mechanism is provided between the reflective cup holder 133 and the focus adjustment ring 132 to drive the reflective cup holder 133 to move along the guide post 135 when the middle segment 131 rotates.

An embodiment in which a guide protrusion 1321 is provided in an inner wall of the focus ring 132 and a guide groove 1331 is provided in an outer wall of the reflector holder 133 is described in detail below with reference to fig. 5 and 6. It should be appreciated that the guide protrusions 1321 may alternatively be provided in the outer wall of the reflector cup holder 133 and the guide grooves 1331 may alternatively be provided in the inner wall of the focus ring 132.

The focus ring 132 is fixed to the inside of the middle link 131, and a guide protrusion 1321 is provided in the inner wall of the focus ring 132. The reflector cup 134 is fixedly installed in the reflector cup holder 133. A guide groove 1331 is formed in an outer wall of the reflector holder 133, and a guide hole (not shown) is formed at the bottom to receive the guide post 135. For example, in the embodiment shown in the drawings, the bottom of the reflector holder 133 is provided with three guide holes, each of which is disposed between the guide grooves 1331 and uniformly spaced apart from each other. It should be understood that similar to the guide posts 135, the guide holes 135 may also be implemented in other numbers, such as one, two, or more than three guide holes, and the guide holes may be evenly or unevenly spaced from one another.

The shape of the guide hole preferably conforms to the cross-sectional shape of the guide post 135. The guide protrusions 1321 are matched with the guide grooves 1331 to drive the reflector holder 133 to move along the guide posts 135 when the focus ring 312 rotates, thereby driving the reflector 134 fixed in the reflector holder 133 to move. The guide protrusion 1321 may be provided in a bar shape having a shape similar to the guide groove 1331, or may be provided as a cylindrical protrusion, as long as the sliding of the guide protrusion 1321 in the guide groove 1331 can be achieved.

And a limiting mechanism for limiting the forward movement and the backward movement of the focus adjusting ring 132 relative to the cylinder body 110 is arranged between the cylinder body and the focus adjusting ring 132, the limiting mechanism comprises a first flange 1233 and a second flange 1322, the first flange 1233 is circumferentially arranged on the cylinder body 110, the second flange 1322 is circumferentially arranged on the focus adjusting ring 132, the forward movement of the focus adjusting ring 132 relative to the cylinder body 110 is limited by the first flange 1233 and the second flange 1322, and the rear end part of the second flange 1322 is abutted to the cylinder body 110 to limit the backward movement of the focus adjusting ring 132 relative to the cylinder body 110.

It should be understood that the limiting mechanism for limiting the forward and backward movement of the focus ring 132 relative to the barrel may be other structures besides the first flange 1233 and the second flange 1322, such as an annular protrusion provided on the focus ring 132, and an annular groove (the annular protrusion and the annular groove are not shown in the figures) provided on the barrel and matching with the annular protrusion, and the focus ring 132 is rotated relative to the barrel by the matching of the annular protrusion and the annular groove, and the forward and backward movement of the focus ring 132 relative to the barrel is also limited.

In some embodiments, the limiting mechanism includes a plurality of second flanges 1322, the plurality of second flanges 1322 being circumferentially distributed on focus ring 132, the plurality of second flanges 1322 having gaps therebetween;

in some embodiments, the second flange 1322 includes a connecting arm and a first protrusion protruding inward, one end of the connecting arm is connected to the focus ring, the other end of the connecting arm is connected to the first protrusion, the focus ring 132 is limited from moving forward relative to the barrel 110 by the cooperation of the first protrusion and the first flange 1233, and a rear end of the first protrusion abuts against the barrel 110 to limit the focus ring 132 from moving backward relative to the barrel 110.

In some embodiments, the middle segment 131 is restricted from moving forward or backward relative to the barrel 110 by the cooperation of the middle segment 131 with the second flange 1322 and the barrel 110;

in some embodiments, the second flange 1322 further includes a second projection protruding outward, the second projection being provided at the other end of the connecting arm; the middle joint 131 is limited to move forwards or backwards relative to the cylinder body 110 through the matching of the second bump and the cylinder body 110;

In some embodiments, as shown in fig. 7, the adjusting ring 132 cannot move forward or backward relative to the cylinder 110 because the focusing ring 132 abuts against the heat dissipating seat 123 of the cylinder 110 in front and abuts against the cylinder 110 in rear, and the adjusting ring 132 cannot move left or right only relative to the cylinder 110 because the adjusting ring 132 is rotatably sleeved on the cylinder 110. Alternatively, a part of the middle segment is in front contact with the second flange 1322 of the focus ring 132 and in rear contact with the barrel, and since the focus ring 132 is already restricted by the barrel 110 and cannot move forward or backward relative to the barrel 110, the middle segment 131 cannot move forward or backward relative to the barrel 110 as well. Of course, in some embodiments, since the middle segment 131 is fixedly connected to or integrally formed with the focus ring 132, when the middle segment 131 rotates, the focus ring 132 rotates.

The focus ring 132 may also be provided with a tab 1324, and correspondingly, the middle section 131 may be provided with a notch therein that matches the tab 1324, such that the tab 1324 may be inserted therein. Therefore, when the user rotates the middle link 131, the focusing ring 132 is rotated by the rotation of the middle link 131. Furthermore, the middle segment 131 may be integrally formed with the focus ring 132. Of course, in some embodiments, the middle segment 131 and the focusing ring 132 may be a separate structure.

In other embodiments according to the present disclosure, the focus ring 132 is provided with a notch rather than a tab. Accordingly, a tab is provided in the middle section 131 that matches the notch so that the tab can be inserted into the notch. Also, when the user rotates the middle link 131, the focusing ring 132 is rotated by the rotation of the middle link 131.

The focus ring 132, when rotated, drives the reflector cup holder 133 along the guide post 135 between a spot position (shown in FIG. 3) and a flood position (shown in FIG. 2). Wherein, in some embodiments, in the spot position, the reflector cup 133 abuts the glass cover 113, and in the flood position, the reflector cup 133 abuts the heat sink 123. For example, in the example shown in the drawings, when the middle section 131 is rotated clockwise, the middle section 131 rotates the focus ring 132 fixed in the middle section 131, and the focus ring 132 moves the reflector cup holder 133 and the reflector cup 134 toward the heat sink 123 to switch from the focus position to the flood position. When the middle segment 131 is rotated counterclockwise, the focus ring 132 moves the reflector cup holder 133 and the reflector cup 134 toward the cover glass 113 to shift from the flood position to the spot position. Of course, it should be understood that the transition from the flood position to the spot position when the middle section 131 is rotated clockwise may also be achieved by arranging the orientations of the guide grooves 1331 and the guide protrusions 1321.

In other embodiments according to the present disclosure, the guide groove 1331 is configured in a corrugated shape, e.g., a sinusoidal shape, and the guide protrusion 1321 is configured as a cylindrical protrusion. In this manner, the transition of the reflector cup holder 133 and the reflector cup 134 from the focus position to the flood position may be achieved by rotating the middle segment 131 in one direction (e.g., clockwise), and after reaching the flood position and upon continued rotation, the reflector cup holder 133 and the reflector cup 134 transition from the flood position to the focus position.

According to the rotary focusing type lighting device 100 disclosed by the disclosure, when the focal length is adjusted, the middle section 131 only rotates and cannot axially move relative to the cylinder 110, and only the reflective cup seat 133 and the reflective cup 134 inside the middle section 131 slide to realize zooming, so that a good waterproof and dustproof effect can be achieved, and the zooming function can be realized underwater.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

The terms "plurality" and "a plurality" in the present disclosure and appended claims refer to two or more than two unless otherwise specified.

It will be apparent to those skilled in the art that various modifications and variations can be made in the disclosed rotary focus illumination apparatus without departing from the spirit or scope of the utility model. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. The utility model provides a rotatory focusing formula lighting device, includes protecgulum and barrel, be equipped with control circuit and power in the barrel, its characterized in that, rotatory focusing formula lighting device still includes:

a light emitting assembly secured to the barrel;

a light reflecting cup;

the focusing ring is sleeved on the barrel body and is rotationally connected with the barrel body;

2. A rotary focus lighting fixture as recited in claim 1, wherein said middle section, said barrel, and said bezel cooperate to enclose said focus ring, said reflector cup holder, and said reflector cup.

3. A rotary focus illumination device as claimed in claim 2, wherein the focus ring and the barrel cooperate to limit forward or backward movement of the middle segment relative to the barrel.

4. A rotary focus illumination apparatus according to claim 3, wherein the limiting mechanism comprises a first flange circumferentially disposed on the barrel, and a second flange circumferentially disposed on the focus ring, forward movement of the focus ring relative to the barrel being limited by the first and second flanges, a rear end of the second flange abutting the barrel to limit rearward movement of the focus ring relative to the barrel.

5. The rotationally focused illumination device of claim 4, wherein the limiting mechanism comprises a plurality of second flanges circumferentially distributed on the focus ring, the plurality of second flanges having gaps therebetween.

6. The rotary focus illumination apparatus of claim 4, wherein the second flange comprises a connecting arm and a first protrusion protruding inwardly, one end of the connecting arm is connected to the focus ring, the other end of the connecting arm is connected to the first protrusion, the focus ring is restricted from moving forward relative to the barrel by the engagement of the first protrusion with the first flange, and a rear end of the first protrusion abuts against the barrel to restrict the focus ring from moving backward relative to the barrel.

7. The rotationally focusing illumination device of claim 4, wherein the middle section is limited from moving forward or backward relative to the barrel by engagement of the middle section with the second flange and the barrel.

8. The rotationally focusing illumination device of claim 5, wherein the second flange further comprises a second protrusion protruding outward, the second protrusion being disposed at the other end of the connecting arm; the middle section is limited to move forwards or backwards relative to the cylinder body through the matching of the second lug and the cylinder body.

9. The rotationally focusing illumination device of claim 8, wherein a front end surface of the outer side surface of the second protrusion expands outward from front to back.

10. The rotationally focused lighting device of claim 1, wherein the snap features comprise tabs provided on the focus ring and notches provided on the middle section.

11. The rotary focusing illumination device of claim 4, wherein the barrel is provided with a heat sink surrounding the light emitting assembly, and the first flange and the guide post are disposed on the heat sink.

12. The rotary focus illumination device of claim 1, wherein a waterproof ring is disposed between the middle section and the barrel.

13. The rotary focusing illumination device as claimed in claim 1, wherein the guiding mechanism comprises a guiding protrusion disposed on the focusing ring and a guiding groove disposed on the reflector holder, and the reflector holder is moved along the guiding post by the guiding groove and the guiding protrusion when the middle segment rotates.

14. A rotary focus lighting fixture as recited in claim 1, wherein said front cover is provided with a glass cover.