An optical focusing device

Abstract

The present invention discloses an optical focusing device, belonging to the field of optical equipment, comprising a housing, an adjustment handle, and an optical lens holder; the housing is provided with a notch penetrating a side wall of the housing; a light shielding plate facing the notch is mounted on the inner side wall of the housing, with a gap space between the light shielding plate and the inner side wall of the housing; guide rails are provided on the light shielding plate and on the inner side wall of the housing opposite to the light shielding plate, the guide rails being parallel to the notch; sliders are mounted on opposite sides of the optical lens holder, and the sliders are provided with guide rail slots adapted to the guide rails; a connecting member is provided in the gap space, the connecting member being fixedly connected to the slider sliding on the light shielding plate; the adjustment handle is rotatably connected to the connecting member, and the adjustment handle is further provided with a locking protrusion, which rotates to abut against the notch to lock the adjustment handle. The present invention has a simple structure and a reasonable design, and can effectively prevent light leakage and reduce jamming.

Description

Technical Field

[0001] The present invention relates to the field of optical equipment, and in particular to an optical focusing device. Background Art

[0002] Optical focusing in lamps primarily achieves focusing by varying the distance between the light source and the lens to create different light spot sizes. Traditional optical focusing devices typically feature a long, rectangular hole in the lamp housing. A thumbscrew passes through the hole and connects to an optical bracket within the housing. The thumbscrew is then pushed back and forth to adjust the distance between the light source and the lens, achieving focusing. Finally, the thumbscrew is tightened to fix the dimming distance.

[0003] Because the traditional optical focusing device has a long hole at the location where the optical focusing device slides, the problem of light leakage must be dealt with at the location where the long hole is provided, which will complicate the structure of the optical focusing device and is not easy to manufacture; moreover, during the sliding process of the optical bracket, all the force points are at the location of the hand screws, and the smoothness of the sliding of the optical bracket is greatly affected by the pushing force of the hand screws. When the pushing force is large, it is easy to cause the optical bracket to get stuck; and the tightness of the sliding of the optical bracket cannot be adjusted. At the same time, after the position adjustment of the optical bracket is completed, the hand screws need to be turned several times to fix it to the desired position, which is very troublesome. Summary of the Invention

[0004] In view of the problems in the prior art that the opening for focusing on the lamp is prone to light leakage and the optical bracket is difficult to fix, the purpose of the present invention is to provide an optical focusing device.

[0005] To achieve the above object, the technical solution of the present invention is:

[0006] An optical focusing device comprises a shell, an adjustment handle located outside the shell and an optical lens holder located inside the shell; the shell is provided with a notch running through the side wall of the shell, a light shielding plate opposite to the notch is installed on the inner wall of the shell, and a gap space is provided between the light shielding plate and the inner side wall of the shell; guide rails are provided on the light shielding plate and on the inner side wall of the shell opposite to the light shielding plate, the guide rails are parallel to the notch, sliders are installed on the opposite sides of the optical lens holder, and guide rail slots adapted to the guide rails are provided on the slider; a connecting piece is provided in the gap space, the connecting piece is fixedly connected to the slider sliding on the light shielding plate, the adjustment handle is rotatably connected to the connecting piece, and a locking protrusion is also provided on the adjustment handle, and the locking protrusion is rotated to abut against the notch to lock the adjustment handle.

[0007] Preferably, the locking protrusion is non-circular, the minimum diameter of the locking protrusion is smaller than the width of the notch, and the maximum diameter of the locking protrusion is larger than the width of the notch.

[0008] Preferably, the locking protrusion is a disc cam.

[0009] Preferably, a threaded hole is provided on the connecting member, a screw is installed on the threaded hole, and a screw through-hole adapted to the screw is provided on the adjusting handle.

[0010] Preferably, the threaded hole is an inner hole of a lock nut, and the lock nut is fixed on the connecting piece.

[0011] Preferably, a stud is provided on the housing, a through hole is provided on the slider, and the slider is mounted on the housing via a nut matched with the stud.

[0012] Preferably, the slider includes a left slider and a right slider, the connecting member is connected to the right slider, and the right slider includes an upper pressure block and a lower support block; the side wall of the upper pressure block and the side wall of the lower support block are both provided with half slots, and the two half slots constitute the guide rail slot.

[0013] Preferably, the dimension of the through hole on the upper pressing block in a direction parallel to the guide rail is adapted to the diameter of the stud, and the dimension in a direction perpendicular to the guide rail is larger than the diameter of the stud.

[0014] Preferably, two guide rail slots adapted to the guide rail are provided on the side wall of the left sliding block.

[0015] Preferably, the shell includes an upper shell and a lower shell, and a cutout is provided on the lower edge of one side of the upper shell, and the cutout and the upper edge of the lower shell form the notch.

[0016] By adopting the above technical solution, due to the setting of the sunshade, the light entering through the slot on the shell can be effectively blocked, reducing the impact of the light on the optical lens, and the structure of the sunshade is convenient for processing and manufacturing; the sunshade and the inner side wall of the shell carry the guide rail, and the optical lens holder slides on the guide rail using a slider, which fully ensures the smooth movement of the optical lens holder and avoids jamming; and due to the setting of the locking protrusion on the adjustment handle, the adjustment handle does not need to be rotated multiple times to be tightened on the slot, thereby facilitating the locking of the optical lens holder and facilitating use and operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2Schematic diagram of the structure of the optical lens holder in the present invention;

[0019] Figure 3 is a cross-sectional view of the adjustment handle of the present invention;

[0020] Figure 4 It is a structural schematic diagram of the left slider in the present invention;

[0021] Figure 5 Schematic diagram of the structure of the lower support block in the present invention;

[0022] Figure 6 It is a structural schematic diagram of the upper pressing block in the present invention.

[0023] In the figure: 1-shell, 100-upper shell, 200-lower shell, 2-adjusting handle, 21-locking protrusion, 3-optical lens bracket, 4-slot, 5-light shielding plate, 6-gap space, 7-guide rail, 8-slider, 81-left slider, 82-right slider, 821-upper pressure block, 822-lower support block, 9-guide rail slot, 10-connector, 11-threaded hole, 12-screw hole, 13-through hole, 14-locking nut, 15-stud. DETAILED DESCRIPTION

[0024] The following is a further description of specific embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is intended to facilitate understanding of the present invention and does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0025] Example 1

[0026] like Figure 1 As shown, an optical focusing device includes a housing 1, an adjustment handle 2 located outside the housing 1, and an optical lens holder 3 located within the housing 1. The housing 1 forms an enclosed space when in use, but to facilitate the removal and assembly of the optical lens holder 3 within the housing, in this embodiment, the housing 1 has two open ends, each of which is sealed by end caps, which are mounted on the housing 1 using screws or socket-and-spigot joints. The cross-section of the housing 1 (perpendicular to the two open ends) can be either rectangular or circular, which does not affect its use. However, in this embodiment, the cross-section of the housing 1 is preferably rectangular, with rounded corners.

[0027] The housing 1 is provided with a slot 4 extending through the side wall of the housing 1. The slot 4 is generally in the shape of an elongated strip, with the length of the slot 4 being parallel to the direction formed by the two open ports. Simultaneously, a light shielding plate 5 is mounted on the inner wall of the housing 1, facing the slot 4. The light shielding plate 5 is L-shaped overall, with one portion perpendicularly connected to the inner wall of the housing 1 and the other portion parallel to the inner wall of the housing 1. The portion parallel to the inner wall of the housing 1 serves as a light shield, while the portion perpendicular to the inner wall of the housing 1 serves as a connection and installation. A gap 6 is formed between the portion of the light shielding plate 5 parallel to the inner wall of the housing 1 and the inner wall of the housing 1. During manufacturing, the light shielding plate 5 is fixed to the inner wall of the housing 1 using screws or snaps, or the light shielding plate 5 is integrally formed on the housing 1. In this embodiment, the light shielding plate 5 is preferably integrally formed on the housing 1.

[0028] Guide rails 7 are provided on both the light shielding plate 5 and the inner sidewall of the housing 1 opposite the light shielding plate 5. The length of the guide rails 7 is parallel to the length of the slot 4. In this embodiment, the guide rails 7 are integrally formed on the light shielding plate 5 and the housing 1. Sliders 8 are mounted on opposite sides (left and right) of the optical lens holder 3. Sliders 8 are provided with guide rail slots 9 that mate with the guide rails 7. The guide rail slots 9 are polished to effectively reduce friction. The optical lens holder 3 slides relative to the housing 1 along the length of the guide rails 7 via the slides 8.

[0029] like Figure 2 As shown, in this embodiment, a stud 15 is provided on the housing 1, and a through hole 13 is correspondingly provided on the slider 8. The slider 8 is sleeved on the stud 15 through the through hole 13 thereon, and the slider 8 is mounted on the housing 1 through a nut adapted to the stud 15. Usually, the circumferential diameter of the nut is larger than the size of the through hole 13 to prevent the nut from falling into the through hole 13 and thus failing to press and fix the slider 8.

[0030] A connecting member 10 is provided in the above-mentioned gap space 6, and the connecting member 10 is fixedly connected to the slider 8 sliding on the sunshade 5. The connecting member 10 is fixed to the slider 8 by screws or a snap-on structure, or the connecting member 10 is integrally formed on the slider 8. In this embodiment, the two are preferably integrally formed to reduce the number of parts.

[0031] The aforementioned adjustment handle 2 is rotatably connected to the connecting member 10. Specifically, in this embodiment, a threaded hole 11 is provided on the side of the connecting member 10 facing the notch 4. The adjustment handle 2 is provided with a screw through-hole 12. A screw passes through the screw through-hole 12 on the adjustment handle 2 and is fixed to the threaded hole 11 on the connecting member 10. This arrangement allows the adjustment handle 2 to rotate relative to the connecting member 10 with the screw as the axis, and to push the connecting member 10 to move through the screw. In order to maintain the overall aesthetics of the adjustment handle 2 and not affect hand operation, the aforementioned screw through-hole 12 is set as a countersunk hole, and the screw is a hexagon socket screw. In order to prevent the screw from falling off, in this embodiment, the aforementioned threaded hole 11 is set as the inner hole of a locknut 14, and the locknut 14 is fixed to the connecting member 10.

[0032] Of course, as an alternative, in another embodiment, the screw is replaced by a shaft, the shaft is fixed to the connecting member 10, and an axial hole adapted to the shaft is provided on the adjusting handle 2, which can also realize the rotation of the adjusting handle 2 relative to the connecting member 10.

[0033] In order to fix the position of the optical lens holder 3 after sliding, Figure 3 As shown, in this embodiment, a locking protrusion 21 is further provided on the adjustment handle 2, and the locking protrusion 21 is rotated to abut against the side wall of the notch 4 to lock the adjustment handle 2;

[0034] Specifically, the locking protrusion 21 is non-circular, and its minimum diameter is smaller than the width of the slot 4, while its maximum diameter is larger than the width of the slot 4. This arrangement ensures that, in one position, the locking protrusion 21 does not contact the sidewalls of the slot 4, ensuring that the adjustment handle 2 can move smoothly within the slot 4. In another position (changed by the rotation of the adjustment handle 2), the locking protrusion 21 contacts and abuts the sidewalls of the slot 4, thereby preventing the adjustment handle 2 from further moving within the slot 4 through the friction between the two. In this embodiment, the locking protrusion 21 is configured as a disc cam.

[0035] When in use, the optical lens holder 3 equipped with the slider 8 is slid along the guide rail 7 into the housing 1, and then the open ports at both ends of the housing 1 are closed; the adjusting handle 2 is connected to the connecting piece 10 by screws; when the position of the optical lens holder 3 needs to be adjusted (i.e. when focusing is required), it is only necessary to push the adjusting handle 2, and the connecting piece 10 drives the slider 8 to move. At this time, since both sides of the optical lens holder 3 slide on the guide rail 7, the problem of the adjusting handle 2 moving and getting stuck will not occur; after focusing is completed, it is only necessary to rotate the adjusting handle 2 to another position, and the outer contour edge of the locking protrusion 21 abuts against the notch 4, and the adjusting handle 2 is locked by friction to achieve the purpose of fixing the focal length.

[0036] In order to reduce weight and cost, in this embodiment, the housing 1, sunshade 5, connector 10, slider 8, and guide rail 7 are all made of plastic, thereby facilitating the implementation of components that are integrally molded with each other.

[0037] Example 2

[0038] The difference between it and embodiment 1 is that: Figure 5 and Figure 6 As shown, the slider 8 comprises a left slider 81 and a right slider 82. The right slider 82 slides along the guide rail 7 on the light shield 5. The right slider 82 further comprises an upper pressing block 821 and a lower supporting block 822. The lower edge of the side wall of the upper pressing block 821 and the upper edge of the side wall of the lower supporting block 822 are both provided with a semi-slot, which together form the guide rail slot 9. Both the upper pressing block 821 and the lower supporting block 822 are provided with a through hole 13 for the stud 15 to pass through. The connector 10 is integrally formed with the lower supporting block 822. The through hole 13 in the upper pressing block 821 is dimensioned to match the diameter of the stud 15 in a direction parallel to the guide rail 7 and to be larger than the diameter of the stud 15 in a direction perpendicular to the guide rail 7. This ensures that the position of the upper pressing block 821 is adjustable in a direction perpendicular to the guide rail 7, thereby ensuring the tightness between the right slider 82 and the guide rail 7, and thus ensuring that the sliding force of the optical lens holder 3 meets the needs of different users.

[0039] At the same time, in this embodiment, the size of the through hole 13 on the lower support block 822 in the direction parallel to the guide rail 7 is adapted to the diameter of the stud 15, and the through hole 13 on the lower support block 822 extends outward in the direction perpendicular to the guide rail 7 and penetrates the side wall of the lower support block 822 to form a notch. The setting of the notch facilitates the installation of the lower support block 81.

[0040] Example 3

[0041] The difference between it and the second embodiment is that: Figure 4 As shown, two guide rail slots 9 are provided on the side wall of the left slider 81 to match the guide rail 7. The two guide rail slots 9 are parallel to each other and can be matched with the guide rail 7 provided on the inner wall of the housing 1 at two different positions, one above the other. This arrangement can meet the need for dual guide rails 7 in certain situations or the need for the guide rails 7 on the left and right sides to have different heights.

[0042] In this embodiment, the through hole 13 on the left slider 81 and the through hole 13 on the lower support block 822 have the same structural form, and both form a notch on the left slider 81 to facilitate installation.

[0043] Example 4

[0044] The difference between this embodiment and the first embodiment is that: in this embodiment, the housing 1 includes an upper housing 100 and a lower housing 200, and the upper housing 100 and the lower housing 200 are connected to form a whole via an end cap; the aforementioned guide rail 7 and light shield 5 are both provided on the upper housing 100; at the same time, a cutout is provided on the lower edge of one side of the upper housing 100, and the cutout and the upper edge of the lower housing 200 form the aforementioned notch 4. That is, due to the provision of the cutout, the upper housing 100 and the lower housing 200 cannot be completely closed after being connected, but an opening is formed on one side, which is the aforementioned notch 4. This provision can reduce the steps and processes for providing the notch 4 on the housing 1, and only requires shortening the side of the upper housing 100 with the cutout. In other words, the cutout does not have to be actually machined; it is merely an external manifestation of a shorter side of the upper housing 100.

[0045] In this embodiment, in order to further facilitate the disassembly and assembly of structural components inside the shell 1, such as the optical lens holder 3, a hollow structure can also be provided on the top of the upper shell 100. The hollow structure divides the upper shell 100 into two independent left and right parts, which are connected by a closing plate, and the closing plate is installed between the above-mentioned two parts through a slot structure; accordingly, the two parts separated by the hollow structure and the closing plate are still connected into a whole through the above-mentioned end cover.

[0046] Similarly, a hollow structure is also provided in the middle of the lower shell 200, which also divides the lower shell 200 into two independent left and right structures. After the left and right parts of the lower shell 200 are fixed by the end covers, an open structure is formed in the middle. This open structure is used to install the shell 1 as a whole on other components.

[0047] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It is apparent to those skilled in the art that various changes, modifications, substitutions, and variations to these embodiments may be made without departing from the principles and spirit of the present invention, and these changes and modifications still fall within the scope of protection of the present invention.

Claims

1. An optical focusing device, characterized in that: The optical lens holder comprises a shell, an adjustment handle located outside the shell, and an optical lens holder located inside the shell; the shell is provided with a notch running through a side wall of the shell, a light shielding plate facing the notch is mounted on the inner wall of the shell, and a gap space is provided between the light shielding plate and the inner wall of the shell; guide rails are provided on the light shielding plate and on the inner wall of the shell opposite to the light shielding plate, the guide rails are parallel to the notch, sliders are mounted on opposite sides of the optical lens holder, and guide rail slots adapted to the guide rails are provided on the sliders; a connecting piece is provided in the gap space, the connecting piece is fixedly connected to the slider sliding on the light shielding plate, the adjustment handle is rotatably connected to the connecting piece, and a locking protrusion is further provided on the adjustment handle, and the locking protrusion is rotated to abut against the notch to lock the adjustment handle; The housing is provided with a stud, the slider is provided with a through hole, and the slider is mounted on the housing via a nut adapted to the stud; The slider includes a left slider and a right slider, the connecting member is connected to the right slider, and the right slider includes an upper pressing block and a lower supporting block; the side walls of the upper pressing block and the side walls of the lower supporting block are both provided with half-slots, and the two half-slots constitute the guide rail slot; The through hole on the upper pressing block has a size in a direction parallel to the guide rail that matches the diameter of the stud, and a size in a direction perpendicular to the guide rail that is larger than the diameter of the stud; Two guide rail slots adapted to the guide rail are provided on the side wall of the left sliding block.

2. The optical focusing device according to claim 1, wherein: The locking protrusion is non-circular, the minimum diameter of the locking protrusion is smaller than the width of the notch, and the maximum diameter of the locking protrusion is larger than the width of the notch.

3. The optical focusing device according to claim 2, wherein: The locking protrusion is a disc cam.

4. The optical focusing device according to claim 1, wherein: The connecting piece is provided with a threaded hole, a screw is installed on the threaded hole, and the adjusting handle is provided with a screw through-hole adapted to the screw.

5. The optical focusing device according to claim 4, wherein: The threaded hole is the inner hole of the anti-loosening nut, and the anti-loosening nut is fixed on the connecting piece.

6. The optical focusing device according to claim 1, wherein: The shell comprises an upper shell and a lower shell. A cutout is provided on the lower edge of one side of the upper shell. The cutout and the upper edge of the lower shell form the notch.

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