WO2024174165A1 - Dimming device and dimming system - Google Patents

Abstract

A dimming device (100), relating to the technical field of automobile lighting. The dimming device (100) is used for adjusting a module to be dimmed (300), and comprises a housing (110), a double-threaded screw (120) and a micro-motion component (130). The double-threaded screw (120) is separately provided with a first threaded section (121) and a second threaded section (122), and the thread pitch of the first threaded section (121) is different from the thread pitch of the second threaded section (122). The double-threaded screw (120) is in threaded connection with first internal threads on the housing (110) by means of the first threaded section (121), and the dual-threaded screw (120) is in threaded connection with second internal threads on the micro-motion component (130) by means of the second threaded section (122). A first micro-motion ball head (131) is provided at the end part of the micro-motion component (130) away from the double-threaded screw (120), the first micro-motion ball head (131) being configured to be connected to said module (300). The dimming device (100) uses the differential screw driving generated by the thread pitches of the two different threaded sections of the double-threaded screw (120) to precisely adjust the position of the micro-motion component (130) with respect to the housing (110), and has high adjustment precision, a simple manufacturing process and a low cost.

Description

A dimming device and a dimming system Technical Field

The present disclosure relates to the field of automobile lighting technology, and in particular to a dimming device and a dimming system.

Background Art

As the eyes of a car, the headlights not only affect the appearance of the car, but are also closely related to driving safety at night or in bad weather conditions. In recent years, multi-module headlights have been used more and more widely. In order to align the light shapes produced by multiple modules, the modules need to be dimmed.

Existing dimming mechanisms usually use a dimming screw and a fixing buckle thread to achieve dimming. During the dimming process, one end of the dimming bracket is fixed to the fixing buckle, and the other end is fixed to the lamp housing through a ball head connector. The dimming screw is rotated, and the fixing buckle moves on the screw to drive the entire dimming bracket to rotate, thereby achieving dimming of the headlight module. However, through thread dimming, the dimming accuracy is limited by the thread pitch, resulting in low dimming accuracy. To achieve high-precision dimming, the thread pitch must be small, but a small thread pitch means higher processing difficulty and processing cost.

Summary of the invention

The purpose of the present disclosure is to provide a dimming device and a dimming system, which can precisely adjust the automobile headlamp module and have the advantages of high adjustment accuracy, simple manufacturing process and low cost.

The embodiments of the present disclosure are implemented as follows:

A dimming device is used to adjust a module to be dimmed, comprising a shell, a double-threaded screw and a micro-motion component, the double-threaded screw is respectively provided with a first thread segment and a second thread segment, the pitch of the first thread segment is different from the pitch of the second thread segment, the double-threaded screw is threadedly connected to a first threaded hole on the shell through the first thread segment, the double-threaded screw is threadedly connected to a second threaded hole on the micro-motion component through the second thread segment, a first micro-motion ball head is provided at the end of the micro-motion component away from the double-threaded screw, and the first micro-motion ball head is configured to be connected to the module to be dimmed.

Optionally, as an implementable manner, the thread pitch of the first thread segment is greater than the thread pitch of the second thread segment, and the first thread segment and the second thread segment have the same rotation direction.

Optionally, as an implementable method, a mounting groove extending toward the interior of the shell is provided on the first surface of the shell, and a first positioning boss is provided around the side wall of the double-threaded screw. The first positioning boss is located between the first thread segment and the second thread segment, and cooperates with the mounting groove and the first positioning boss is accommodated in the mounting groove.

Optionally, as an implementable manner, the first threaded hole is arranged on a second surface of the shell opposite to the first surface and extends toward the inside of the shell to communicate with the mounting groove.

Optionally, as an implementable manner, the micro-motion component further includes a micro-motion rod, and the first micro-motion ball head is arranged on The second threaded hole is located at the end of the micro-motion rod and is located at the end surface of the micro-motion rod away from the first micro-motion ball head.

Optionally, as an implementable manner, a second positioning boss is disposed around the side wall of the micro-motion rod, the second positioning boss cooperates with the mounting groove and the second positioning boss is accommodated in the mounting groove.

Optionally, as an implementable manner, a third positioning boss is further arranged around the side wall of the micro-motion rod, the third positioning boss is located between the second positioning boss and the first micro-motion ball head, and the orthographic projection of the third positioning boss on the second positioning boss is located inside the second positioning boss.

Optionally, as an implementable manner, a fastening hole is provided on the side wall of the shell, and the fastening hole is connected to the mounting groove. The dimming device also includes a fastening screw, which is threadedly connected to the fastening hole and abuts against the first positioning boss.

Optionally, as an implementable manner, the mounting groove and the second positioning boss are both in the shape of a polygonal column, and the inner wall of the mounting groove is adapted to the outer wall of the second positioning boss.

Optionally, as an implementable manner, the first positioning boss is cylindrical, and the outer wall of the first positioning boss is tangent to the inner wall of the mounting groove.

Optionally, as an implementable manner, two opposite end faces of the double-threaded screw are respectively provided with adjustment grooves, and the adjustment grooves are configured to be adaptable to a tightening tool.

A dimming system comprises any one of the dimming devices described above.

Optionally, as an implementable method, it also includes a dimming bracket and a fulcrum screw fixed on the dimming bracket, the fulcrum screw is provided with a third thread segment, and the other opposite end is provided with a second micro-motion ball head, the fulcrum screw is threadedly connected to the dimming module through the third thread segment, and is connected to the dimming bracket through the second micro-motion ball head; the housing of the dimming device is fixedly connected to the dimming bracket.

Optionally, as an implementable method, a limiting boss is arranged around one end of the shell away from the micro-motion component of the dimming device, and at least two clamping feet are provided at the end close to the micro-motion component. The clamping feet are inclined toward the limiting boss, and the clamping feet are configured to move toward the shell after being compressed and to recover after the pressure is released.

Optionally, as an implementable manner, a first through hole is provided on the dimming bracket, the shell and the first through hole are both polygonal columnar, and the outer wall of the shell cooperates with the first through hole.

Optionally, as an implementable manner, an anti-rotation rib is provided on the outer wall of the shell, a second through hole is provided on the dimming bracket, and an anti-rotation groove cooperating with the anti-rotation rib is provided on the inner wall of the second through hole.

Optionally, as an implementable manner, the dimming device includes two, and the fulcrum screw and the two dimming devices are distributed in a triangle on the dimming bracket.

Optionally, as an implementable manner, a third through hole is provided on the dimming bracket, and the dimming module passes through the third through hole.

The beneficial effects of the embodiments of the present disclosure include:

The dimming device provided in the embodiment of the present disclosure is used to adjust the module to be dimmed, including a housing, a double-threaded screw and The micro-motion component, the double-threaded screw is respectively provided with a first thread segment and a second thread segment, the thread pitch of the first thread segment is different from the thread pitch of the second thread segment, the double-threaded screw is threadedly connected to the first threaded hole on the shell through the first thread segment, and the double-threaded screw is threadedly connected to the second threaded hole on the micro-motion component through the second thread segment, and the end of the micro-motion component away from the double-threaded screw is provided with a first micro-motion ball head, and the first micro-motion ball head is configured to be connected to the module to be dimmed. The above-mentioned dimming device uses the differential screw transmission generated by the thread pitch difference between the first thread segment and the second thread segment on the double-threaded screw to achieve precise adjustment of the position between the micro-motion component and the shell, and then achieves precise adjustment of the module to be dimmed, with high adjustment accuracy, simple manufacturing process and low cost.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

FIG1 is a schematic diagram of a structure of a dimming device provided in an embodiment of the present disclosure;

FIG2 is a cross-sectional view of a dimming device provided in an embodiment of the present disclosure;

FIG3 is a schematic diagram of the structure of a double-threaded screw in a dimming device provided in an embodiment of the present disclosure;

FIG4 is a schematic diagram of the structure of a micro-movement component in a dimming device provided in an embodiment of the present disclosure;

FIG5 is a second structural schematic diagram of the dimming device provided in an embodiment of the present disclosure;

FIG6 is a schematic diagram of the structure of a dimming system provided in an embodiment of the present disclosure;

FIG. 7 is a cross-sectional view of a dimming system provided in an embodiment of the present disclosure.

Icon: 100-dimming device; 110-housing; 111-first surface; 112-second surface; 113-installing groove; 114-limiting boss; 115-clamping foot; 120-double-threaded screw; 121-first thread; 122-second thread; 123-first positioning boss; 124-adjusting groove; 130-micro-motion component; 131-first micro-motion ball head; 132-micro-motion rod; 133-second positioning boss; 134-third positioning boss; 140-fastening screw; 200-dimming system; 210-dimming bracket; 211-third through hole; 220-fulcrum screw; 221-second micro-motion ball head; 230-ball head nut; 300-module to be dimmed.

DETAILED DESCRIPTION

In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. The components of the embodiments of the present disclosure described and shown in the drawings here can be arranged and designed in various different configurations.

Therefore, the following detailed description of the embodiments of the present disclosure provided in the accompanying drawings is not intended to limit the scope of the claimed The present disclosure does not represent the scope of the present disclosure, but only represents selected embodiments of the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present disclosure.

It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition and explanation in the subsequent drawings.

In the description of the present disclosure, it should be noted that the orientation or positional relationship indicated by the terms "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use, and is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

In the description of the present disclosure, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

Please refer to Figures 1 to 3. This embodiment provides a dimming device 100 for adjusting a module to be dimmed, including a shell 110, a double-threaded screw 120 and a micro-motion component 130. The double-threaded screw 120 is respectively provided with a first thread segment 121 and a second thread segment 122. The thread pitch of the first thread segment 121 is different from the thread pitch of the second thread segment 122. The double-threaded screw 120 is threadedly connected to the first threaded hole on the shell 110 through the first thread segment 121, and the double-threaded screw 120 is threadedly connected to the second threaded hole on the micro-motion component 130 through the second thread segment 122. A first micro-motion ball head 131 is provided at the end of the micro-motion component 130 away from the double-threaded screw 120, and the first micro-motion ball head 131 is configured to be connected to the module 300 to be dimmed.

The two sections of the double-threaded screw 120 of the dimming device 100 are threadedly connected to the shell 110 and the micro-motion component 130 respectively; please refer to Figures 6 and 7, the dimming device 100 is fixed to the mounting bracket 210 through the shell 110, and then connected to the module 300 to be dimmed through the first micro-motion ball head 131 on the micro-motion component 130. The double-threaded screw 120 is rotated to adjust the relative position of the shell 110 and the micro-motion component 130, so as to adjust the position of the module 300 to be dimmed.

For example, the housing 110 and the micro-movement component 130 are both made of plastic, and in order to ensure strength, polyoxymethylene or a mixture of polyoxymethylene and glass fiber is used. The double-threaded screw 120 is made of metal, such as cold-pressed carbon steel wire (SWRCH22A).

The dimming device 100 comprises a housing 110, a double-threaded screw 120 and a micro-movement component 130. The double-threaded screw 120 is threadedly connected to the housing 110 and the micro-movement component 130 respectively. The differential screw transmission generated by the different thread pitches of the thread segments 121 and 122 can realize the precise adjustment of the position between the micro-motion component 130 and the housing 110, with high adjustment accuracy, simple manufacturing process and low cost.

Optionally, in one implementable manner of the embodiment of the present disclosure, the thread pitch of the first thread segment 121 is greater than the thread pitch of the second thread segment 122 , and the first thread segment 121 and the second thread segment 122 have the same rotation direction.

The differential screw transmission generated by the difference in thread pitch between the first thread segment 121 and the second thread segment 122 is used to achieve precise adjustment of the dimming module 300; the double-threaded screw 120 is connected to the micro-movement component 130 through the second thread segment 122, and the micro-movement component 130 is connected to the dimming module 300. The thread pitch of the second thread segment 122 is set to be smaller than the thread pitch of the first thread segment 121, which can further improve the adjustment accuracy of the dimming device 100. The first thread segment 121 and the second thread segment 122 have the same rotation direction, so that the relative position between the housing 110 and the micro-movement component 130 can be adjusted by rotating the double-threaded screw 120, which is simple and convenient to operate.

Optionally, in one achievable manner of the embodiment of the present disclosure, a mounting groove 113 extending toward the inside of the housing 110 is provided on the first surface 111 of the housing 110, and a first positioning boss 123 is provided around the side wall of the double-threaded screw 120, the first positioning boss 123 is located between the first thread segment 121 and the second thread segment 122, and cooperates with the mounting groove 113, and the first positioning boss 123 can be accommodated in the mounting groove 113, preferably, the size of the first positioning boss 123 is slightly smaller than the size of the mounting groove 113, so as to cooperate with the mounting groove 113 to guide the installation of the double-threaded screw 120. It should be understood that the mounting groove 113 should not hinder the rotation of the first positioning boss 123, so as to avoid the inability to rotate the double-threaded screw 120.

Optionally, in one implementable manner of the embodiment of the present disclosure, the first threaded hole is disposed on the second surface 112 of the shell 110 , the second surface 112 is opposite to the first surface 111 , and the first threaded hole extends into the shell 110 and communicates with the mounting groove 113 .

The first threaded hole is matched and connected with the first threaded section 121 of the double-threaded screw 120, one end of the first threaded hole is located on the second surface 112 of the housing 110, the second surface 112 is arranged opposite to the first surface 111, and the first threaded hole extends into the housing 110 so that the other end of the first threaded hole is connected to the mounting groove 113, so as to facilitate the rotation of the double-threaded screw 120 through the first threaded hole outside the housing 110. At the same time, the first threaded section 121 of the double-threaded screw 120 can extend out of the housing 110 and will not interfere with the housing 110, and the adjustable range of the position of the dimming module 300 can be increased by increasing the length of the first threaded section 121.

Please refer to Figures 1, 2, 4 and 6. Optionally, in one achievable manner of the embodiment of the present disclosure, the fine-motion component 130 further includes a fine-motion rod 132, a first fine-motion ball head 131 is disposed at the end of the fine-motion rod 132, and the second threaded hole is located at the end surface of the fine-motion rod 132 away from the first fine-motion ball head 131 and extends toward the inside of the fine-motion rod 132. The first fine-motion ball head 131 and the second threaded hole are respectively located at opposite ends of the fine-motion rod 132, respectively realizing connection with the dimming module 300 to be dimmed and the double-threaded screw 120 (i.e., the dimming bracket 210), so as to facilitate adjustment of the position of the dimming module 300 to be dimmed.

Optionally, in an achievable manner of the embodiment of the present disclosure, a second positioning boss 133 is disposed around the side wall of the micro-motion rod 132, and the second positioning boss 133 cooperates with the mounting groove 113. The micro-motion component 130 extends into the mounting groove 113. The second positioning boss 133 is threadedly connected with the double-threaded screw 120 , and can be accommodated in the installation groove 113 to cooperate with the installation groove 113 to guide the movement of the micro-motion component 130 .

Optionally, in one implementable manner of the embodiment of the present disclosure, the inner wall of the mounting groove 113 and the outer wall of the second positioning boss 133 are adapted to each other, both are polygonal columns, the first positioning boss 123 is cylindrical, and the outer wall of the first positioning boss 123 is tangent to the inner wall of the mounting groove 113 .

The mounting groove 113 and the second positioning boss 133 are limited to a polygonal column, and the first positioning boss 123 is limited to a cylindrical shape, so that the micro-motion component 130 can only move axially along the mounting groove 113 in the mounting groove 113, and the double-threaded screw 120 can also be rotated in the mounting groove 113 and play a guiding role when installed in the mounting groove 113.

Optionally, in one implementable manner of the embodiment of the present disclosure, a third positioning boss 134 is further arranged around the side wall of the micro-motion rod 132 , and the third positioning boss 134 is located between the second positioning boss 133 and the first micro-motion ball head 131 , and the orthographic projection of the third positioning boss 134 on the second positioning boss 133 is located within the second positioning boss 133 .

The size of the third positioning boss 134 is smaller than that of the second positioning boss 133 to ensure that the third positioning boss 134 can smoothly extend into the interior of the mounting groove 113. The surface of the third positioning boss 134 away from the second positioning boss 133 is the reference plane. When installing the micro-motion component 130, the reference plane is detected to be flush with the end face of the shell 110 to confirm whether the micro-motion component 130 is installed in place.

Please refer to Figures 2 and 5. Optionally, in one achievable method of the embodiment of the present disclosure, a side wall of the shell 110 is provided with a fastening hole, the fastening hole is connected to the mounting groove 113, and the dimming device 100 also includes a fastening screw 140, which is threadedly connected to the fastening hole and abuts against the first positioning boss 123.

The fastening screw 140 limits the movement of the double-threaded screw 120 to prevent the double-threaded screw 120 from rotating when the dimming module 300 is vibrated after dimming is completed. For example, the fastening screw 140 is a self-tapping screw.

Please refer to Figure 3. Optionally, in one achievable method of the embodiment of the present disclosure, two opposite end faces of the double-threaded screw 120 are respectively provided with adjustment grooves 124, and the adjustment grooves 124 are configured to be compatible with a tightening tool to facilitate the use of the tightening tool to install it or rotate it when dimming.

For example, the adjustment slot 124 is in a straight or cross shape to fit most tightening tools on the market.

The installation steps of the components of the above-mentioned dimming device 100 are as follows: first, install the double-threaded screw 120 from the mounting groove 113 of the shell 110, and screw the first thread segment 121 into the first threaded hole connected to the mounting groove 113 through the adjustment groove 124 close to the second thread segment 122; then, extend the second positioning boss 133 of the micro-motion component 130 into the mounting groove 113, and screw the second thread segment 122 into the second threaded hole of the micro-motion component 130 through the adjustment groove 124 close to the first thread segment 121; finally, adjust the double-threaded screw 120 through the adjustment groove 124 close to the first thread segment 121 so that the upper surface of the third positioning boss 134 of the micro-motion component 130 is flush with the first surface 111 of the shell 110.

Referring to FIG. 6 , the embodiment of the present disclosure further discloses a dimming system 200 , which includes any one of the dimming devices 100 described above.

The dimming system 200 includes the same structure and beneficial effects as the dimming device 100 in the above embodiment. The structure and beneficial effects of the dimming device 100 have been described in detail in the above embodiment, and will not be repeated here.

Please refer to Figure 7. Optionally, in an achievable method of the embodiment of the present disclosure, it also includes a dimming bracket 210 and a fulcrum screw 220 fixed on the dimming bracket 210, the fulcrum screw 220 is provided with a third thread segment, and the other opposite end is provided with a second micro-motion ball head 221, the fulcrum screw 220 is connected to the dimming module 300 through the third thread segment, and is connected to the dimming bracket 210 through the second micro-motion ball head 221; the housing 110 of the dimming device 100 is fixedly connected to the dimming bracket 210.

For example, the second fine-motion ball head 221 is connected to the dimming bracket 210 via a ball head nut 230 , a third threaded hole is provided on the dimming module 300 , and the third threaded section is threadedly connected to the third threaded hole.

By setting the dimming device 100 and the fulcrum screw 220, the connection between the dimming bracket 210 and the module 300 to be dimmed is achieved, and the dimming device 100 and the fulcrum screw 220 respectively have a first micro-motion ball head 131 and a second micro-motion ball head 221, so that under the rotation adjustment of the dimming device 100, the module 300 to be dimmed can be rotated with the line connecting the fulcrum screw 220 and another dimming device 100 as the rotation axis to achieve dimming. It should be noted that at least two dimming devices 100 are installed on the dimming module 300.

Please refer to Figures 5 and 7. Optionally, in one achievable method of the embodiment of the present disclosure, a limiting boss 114 is arranged around one end of the shell 110 away from the micro-motion component 130 of the dimming device 100, and at least two clamping feet 115 are arranged at one end close to the micro-motion component 130. The clamping feet 115 are inclined toward the limiting boss 114, and the clamping feet 115 are configured to move toward the shell 110 after being subjected to force, and can recover after the external force disappears.

At least two clamping feet 115 are arranged around the housing 110, and the first end of the clamping foot 115 is connected to the end of the housing 110, and the second end opposite to the first end extends toward the limiting boss 114 and tilts outward to separate from the side wall of the housing 110. The clamping foot 115 will be elastically deformed and store energy when subjected to force. Under the drive of external force, the second end of the clamping foot 115 moves toward the housing 110, and the clamping foot 115 recovers after the external force disappears. The clamping foot 115 cooperates with the limiting boss 114 to clamp the housing 110 of the dimming device 100 onto the dimming bracket 210.

Optionally, in one implementable manner of the embodiment of the present disclosure, a first through hole is provided on the dimming bracket 210, the shell 110 and the first through hole are both polygonal columnar, and the outer wall of the shell 110 cooperates with the first through hole.

The size of the outer wall of the shell 110 is equal to or slightly smaller than the size of the first through hole to ensure that the shell 110 can be smoothly installed in the first through hole; the shell 110 and the first through hole are both polygonal columns to prevent the shell 110 from rotating in the first through hole.

Optionally, in one implementable manner of the embodiment of the present disclosure, an anti-rotation rib is provided on the outer wall of the shell 110, a second through hole is provided on the dimming bracket 210, and an anti-rotation groove cooperating with the anti-rotation rib is provided on the inner wall of the second through hole.

The size of the outer wall of the housing 110 is equal to or slightly smaller than the size of the second through hole to ensure that the housing 110 can be smoothly installed in the second through hole. The extension direction of the anti-rotation rib and the anti-rotation groove are parallel to the axis of the housing 110. When installing, The anti-rotation rib body can be aligned with the anti-rotation groove and inserted into the second through hole; the anti-rotation rib body can be limited by the anti-rotation groove to prevent the housing 110 from rotating in the second through hole.

Optionally, in one implementable manner of the embodiment of the present disclosure, the dimming device 100 includes two, and the fulcrum screw 220 and the two dimming devices 100 are distributed in a triangular shape on the dimming bracket 210. When one of the dimming devices 100 is dimmed, the line connecting the fulcrum screw 220 and the other dimming device 100 is used as the rotation axis, so that the dimming module 300 to be dimmed can rotate about the rotation axis to achieve dimming of the dimming module 300 in the up and down and left and right directions.

Optionally, in one implementable manner of the embodiment of the present disclosure, a third through hole 211 is provided on the dimming bracket 210, and the dimming module 300 passes through the third through hole 211 to prevent the dimming module 300 from interfering with the dimming bracket 210 when being installed in the above-mentioned dimming system 200.

The dimming method of the dimming system 200 is as follows: first, the fulcrum screw 220 is installed on the dimming bracket 210 through the ball nut 230, and the dimming device 100 is installed in the mounting hole (the first through hole or the second through hole) of the dimming bracket 210; the installation is completed when the clamping foot 115 of the dimming device 100 completely passes through the mounting hole. At this time, the clamping foot 115 and the limiting boss 114 clamp the mounting hole, so that the dimming device 100 cannot move axially. Since there is an anti-rotation structure between the housing 110 of the dimming device 100 and the mounting hole, the dimming device 100 cannot rotate axially. Then, the dimming module 300 is connected to the first fine-motion ball head 131 of the fine-motion component 130 through the ball head nut 230, and at the same time, the dimming module 300 is connected to the fulcrum screw 220; finally, the adjustment slot 124 close to the first threaded segment 121 is adjusted to make the dimming module 300 reach the desired optical position, and the fastening screw 140 is screwed in to resist the first positioning boss 123 to prevent the double-threaded screw 120 from rotating when the dimming module 300 is vibrated.

The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Industrial Applicability

The dimming device and dimming system disclosed herein realize precise adjustment of the position between the micro-motion component and the housing through differential screw transmission generated by the thread pitches of two groups of different thread segments of a double-threaded screw. The dimming accuracy is high, the manufacturing process is simple and the cost is low.

Claims (18)

A dimming device for adjusting a module to be dimmed, characterized in that it includes a shell, a double-threaded screw and a micro-motion component, the double-threaded screw is respectively provided with a first thread segment and a second thread segment, the thread pitch of the first thread segment is different from the thread pitch of the second thread segment, the double-threaded screw is threadedly connected to the first threaded hole on the shell through the first thread segment, the double-threaded screw is threadedly connected to the second threaded hole on the micro-motion component through the second thread segment, the end of the micro-motion component away from the double-threaded screw is provided with a first micro-motion ball head, and the first micro-motion ball head is configured to be connected to the module to be dimmed. The dimming device according to claim 1 is characterized in that the thread pitch of the first thread segment is greater than the thread pitch of the second thread segment, and the first thread segment and the second thread segment have the same rotation direction. The dimming device according to claim 1 or 2 is characterized in that a mounting groove extending toward the interior of the shell is provided on the first surface of the shell, a first positioning boss is provided around the side wall of the double-threaded screw, the first positioning boss is located between the first thread segment and the second thread segment, and cooperates with the mounting groove and the first positioning boss is accommodated in the mounting groove. The dimming device according to claim 3 is characterized in that the first threaded hole is arranged on a second surface of the housing opposite to the first surface and extends into the interior of the housing to communicate with the mounting groove. The dimming device according to claim 3 is characterized in that the fine-motion component also includes a fine-motion rod, the first fine-motion ball head is arranged at the end of the fine-motion rod, and the second threaded hole is located on the end surface of the fine-motion rod away from the first fine-motion ball head and extends toward the inside of the fine-motion rod. The dimming device according to claim 5 is characterized in that a second positioning boss is arranged around the side wall of the micro-movement rod, the second positioning boss cooperates with the mounting groove and the second positioning boss is accommodated in the mounting groove. The dimming device according to claim 6 is characterized in that a third positioning boss is also arranged around the side wall of the micro-motion rod, the third positioning boss is located between the second positioning boss and the first micro-motion ball head, and the orthographic projection of the third positioning boss on the second positioning boss is located inside the second positioning boss. The dimming device according to claim 3 is characterized in that a fastening hole is provided on the side wall of the shell, the fastening hole is connected to the mounting groove, and the dimming device also includes a fastening screw, which is threadedly connected to the fastening hole and abuts against the first positioning boss. The dimming device according to claim 3 is characterized in that the mounting groove and the second positioning boss are both polygonal columnar, and the inner wall of the mounting groove is adapted to the outer wall of the second positioning boss. The dimming device according to claim 9, characterized in that the first positioning boss is cylindrical, and the outer wall of the first positioning boss is tangent to the inner wall of the mounting groove. The dimming device according to any one of claims 1 to 10, characterized in that the double thread Two opposite end surfaces of the screw are respectively provided with adjustment grooves, and the adjustment grooves are configured to be compatible with a tightening tool. A dimming system, characterized by comprising the dimming device according to any one of claims 1 to 11. The dimming system according to claim 12 is characterized in that it also includes a dimming bracket and a fulcrum screw fixed on the dimming bracket, the fulcrum screw is provided with a third thread segment, and the other end opposite to it is provided with a second micro-motion ball head, the fulcrum screw is threadedly connected to the dimming module through the third thread segment, and is connected to the dimming bracket through the second micro-motion ball head; The housing of the dimming device is fixedly connected to the dimming bracket. The dimming system according to claim 13 is characterized in that a limiting boss is arranged around one end of the shell away from the micro-movement component of the dimming device, and at least two clamping feet are arranged at one end close to the micro-movement component, and the clamping feet are inclined toward the limiting boss, and the clamping feet are configured to move toward the shell after being compressed and can recover after the pressure is released. The dimming system according to claim 13 is characterized in that a first through hole is provided on the dimming bracket, the shell and the first through hole are both polygonal columns, and the outer wall of the shell cooperates with the first through hole. The dimming system according to claim 13 is characterized in that an anti-rotation rib is provided on the outer wall of the shell, a second through hole is provided on the dimming bracket, and an anti-rotation groove cooperating with the anti-rotation rib is provided on the inner wall of the second through hole. The dimming system according to claim 13 is characterized in that the dimming devices include two, and the fulcrum screw and the two dimming devices are distributed in a triangular shape on the dimming bracket. The dimming system according to claim 13 is characterized in that a third through hole is provided on the dimming bracket, and the module to be dimmed passes through the third through hole.