A multi-stage brightness adjustment LED bulb lamp

Abstract

The application relates to the technical field of ball bubble lamps, in particular to a multi-stage brightness-adjustable LED ball bubble lamp, which comprises a base, a lamp holder fixedly installed at the upper end of the base, and multiple groups of lamp beads densely arranged at the bottom of the base; a brightness-adjusting assembly is arranged at the upper end of the base and comprises an adjusting groove, a first power-on plate, a second power-on plate, an adjusting block, a butt joint groove, a fixed plate, a rotating sleeve, a first butt joint plate, a first power-on strip, a first contact, a first limiting groove, a first limiting strip, a wire, a second butt joint plate, a second power-on strip, a second contact, a second limiting groove, a second limiting strip, a pointing mark and a contrast mark; the beneficial effect is that the second power-on plate arranged in the multi-stage brightness-adjustable LED ball bubble lamp is electrically connected with different numbers of lamp beads, so that the brightness of the first butt joint plate and the second butt joint plate is different when the first butt joint plate cooperates with the second butt joint plate to connect the different first power-on plate and the second power-on plate in series, and the effect of multi-stage brightness adjustment is achieved.

Description

Technical Field

[0001] This invention relates to the field of LED bulbs, and in particular to an LED bulb with multi-level brightness adjustment. Background Technology

[0002] Traditional incandescent lamps (tungsten filament lamps) are energy-intensive and have a short lifespan. Given the global scarcity of resources, their production has been gradually banned by governments worldwide. The replacement product is the LED bulb, which uses the familiar spherical shape of a light bulb and LED chips as its internal light source. It possesses all the advantages of LED lighting: energy saving, environmental friendliness, and long lifespan.

[0003] Currently, existing LED bulbs typically connect the upper lamp head to the lamp holder, emitting light through LED beads mounted on the base at the bottom of the lamp head. However, existing LED bulbs lack brightness adjustment functionality, making it impossible to provide suitable lighting for spaces of different sizes. This results in excessive brightness in smaller spaces and insufficient brightness in larger spaces. Therefore, we propose a multi-level brightness adjustable LED bulb to solve this problem. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-level brightness adjustable LED bulb to solve the problem mentioned in the background art that existing LED bulbs do not have a brightness adjustment function and cannot provide suitable lighting for spaces of different sizes.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a multi-level brightness adjustable LED bulb, comprising:

[0006] The base has a lamp holder fixedly installed at the top and multiple sets of LED beads densely distributed at the bottom.

[0007] The brightness adjustment component is located at the upper end of the base and includes an adjustment slot, a first power board, a second power board, an adjustment block, a docking slot, a fixing plate, a rotating sleeve, a first docking plate, a first power strip, a first contact, a first limiting slot, a first limiting strip, wiring, a second docking plate, a second power strip, a second contact, a second limiting slot, a second limiting strip, a pointer, and a reference pointer.

[0008] The locking linkage component is located inside the brightness adjustment component and includes a movable cavity, a spring, a locking block, a locking groove, a shifting groove, and a connecting rod.

[0009] Preferably, the adjustment groove is located at the upper end of the base, and the adjustment groove is configured as an annular groove. The upper end and the outer side of the adjustment groove penetrate the base. Multiple sets of first power plates are arranged in an annular shape at equal intervals inside the upper end of the adjustment groove. The upper end of each first power plate is fixedly connected to the lamp holder, and the upper end of each first power plate is electrically connected to the lamp holder.

[0010] Preferably, the bottom of the adjustment groove is provided with multiple sets of second power boards arranged in a ring at equal intervals. The bottom of each second power board is fixedly connected to the side wall of the adjustment groove, and the bottom of each second power board is electrically connected to a different number of LED beads.

[0011] Preferably, an adjusting ring is movably arranged inside the adjusting groove. The adjusting ring is configured as a T-shaped annular structure. The inner diameter of the adjusting ring is adapted to the adjusting groove, and the outer diameter of the adjusting ring is larger than the outer diameter of the lamp head. Multiple sets of auxiliary grooves are arranged in an annular pattern at equal intervals on the outer side of the adjusting ring.

[0012] Preferably, the docking groove is located inside the adjusting ring, and the adjusting ring passes through the inner side of the docking groove. The docking groove is set as a vertical rectangular groove. A fixing plate is set in the middle of the docking groove. The side walls of the docking groove are fixedly connected to both sides of the fixing plate. A rotating sleeve is movably sleeved on the outer side of the fixing plate. The rotating sleeve is set as a ring structure made of nylon material. The size of the rotating sleeve is adapted to the fixing plate.

[0013] Preferably, a first mating plate is fixedly connected to the upper inner side of the rotating sleeve. The first mating plate is configured as a vertical plate structure, and its width is adapted to the mating groove. A first energizing strip is fixedly connected to the upper end of the first mating plate. The first energizing strip is made of metal, and multiple sets of first contacts are equidistantly arranged on the upper end of the first energizing strip. The upper ends of the first contacts are all in contact with the first energizing plate. A first limiting groove is provided on both sides of the first mating plate. The first limiting groove is configured as a vertical strip groove, and its size is adapted to the mating groove. A first limiting strip is provided on both sides of the first mating plate corresponding to the first limiting groove. The first limiting strip is located inside the first limiting groove. A wiring is provided in the middle of the first mating plate. The upper end of the wiring is fixedly connected to the first energizing strip, and the bottom of the wiring passes through the first mating plate and extends to the outside.

[0014] Preferably, a second mating plate is fixedly connected to the bottom outer side of the rotating sleeve. The dimensions of the second mating plate are the same as those of the first mating plate. A second energizing strip is fixedly connected to the bottom of the second mating plate. Multiple sets of second contacts are equidistantly arranged at the bottom of the second energizing strip. The bottom of each second contact is in contact with the corresponding second energizing plate. A second limiting groove is provided on both sides of the second mating plate. The second limiting groove is set as a vertical strip groove. The dimensions of the second limiting groove are adapted to the mating groove. A second limiting strip is fixedly connected to both sides of the second mating plate corresponding to the second limiting groove. The second limiting strip is located inside the second limiting groove.

[0015] Preferably, the pointer is located outside the adjustment ring, and the adjustment ring is fixedly connected to the inside of the pointer. Multiple sets of reference marks are equidistantly arranged at the upper end of the base corresponding to the second power board. The reference marks are set as inclined strip structures of different colors. The base is fixedly connected to the inside of each reference mark, and each reference mark is aligned with the second power board.

[0016] Preferably, the movable cavity is located inside the adjusting ring. The movable cavity is a vertical rectangular cavity, and the bottom of the movable cavity passes through the adjusting ring. A spring is fixedly installed inside the movable cavity, and a locking block is fixedly connected to the bottom of the spring. The locking block is a rectangular block structure with a triangular bottom and rounded corners at the triangular end. A locking groove is provided on the upper end of the base corresponding to the locking block. The locking grooves are all internal grooves with a triangular cross-section. The upper end of each locking groove passes through the base. Multiple sets of locking grooves are provided corresponding to the second power board. The locking grooves are all aligned with the second power board. The bottom of each locking block passes through the movable cavity and extends into the corresponding locking groove.

[0017] Preferably, the upper end of the movable cavity is provided with a sliding groove, which is a vertical L-shaped groove. The inner side of the upper end of the sliding groove is connected to the docking groove. A connecting rod is provided inside the sliding groove. The connecting rod is an L-shaped rod structure. The bottom vertical rod of the connecting rod passes through the sliding groove and extends into the movable cavity. The bottom vertical rod of the connecting rod is located in the middle of the movable cavity and is fixedly connected to the upper end of the locking block. The upper horizontal rod of the connecting rod passes through the sliding groove and extends into the docking groove. The inner end of the upper horizontal rod of the sliding groove is fixedly connected to the outer side of the second docking plate.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] This invention proposes a multi-level brightness adjustable LED bulb with a second energizing plate electrically connecting different numbers of LED beads. This allows for varying brightness levels when different first and second energizing plates are connected in series, achieving multi-level brightness adjustment. This avoids the inability to provide suitable lighting in spaces of different sizes. Furthermore, the adjustable ring and fixing plate allow for the series connection of different first and second energizing plates for easy adjustment. The locking block and locking groove securely lock the adjustable ring, preventing movement after adjustment. The connecting rod facilitates the movement of the second energizing plate, enabling the retraction of the second energizing strip and protecting the second contacts from wear and tear after prolonged use. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a schematic cross-sectional view of the structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the adjusting groove structure of the present invention;

[0024] Figure 4 for Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0025] Figure 5 This is a schematic cross-sectional view of the adjusting ring of the present invention.

[0026] Figure 6 This is a schematic diagram of the first docking plate structure of the present invention.

[0027] Figure 7 This is a partial cross-sectional view of the side of the present invention.

[0028] In the diagram: Base 1, Lamp head 2, Brightness adjustment assembly 3, Adjustment groove 301, First power board 302, Second power board 303, Adjustment ring 304, Connecting groove 305, Fixing plate 306, Rotating sleeve 307, First connecting plate 308, First power strip 309, First contact 310, First limiting groove 311, First limiting strip 312, Wiring 313, Second connecting plate 314, Second power strip 315, Second contact 316, Second limiting groove 317, Second limiting strip 318, Indicator 319, Reference mark 320, Locking linkage assembly 4, Movable cavity 41, Spring 42, Locking block 43, Locking groove 44, Moving groove 45, Connecting rod 46, Lamp bead 5 Detailed Implementation

[0029] To more clearly illustrate the overall concept of the present invention, a detailed description will be provided below with reference to the accompanying drawings and examples.

[0030] It should be noted that many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0031] Furthermore, in the description of this invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0032] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral unit; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. However, specifying a direct connection indicates that the two connected entities do not establish a connection relationship through an intermediate structure, but are simply connected to form a whole through a connecting structure. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0033] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0034] Example 1

[0035] Please see Figures 1 to 7 This invention provides a technical solution: a multi-level brightness adjustable LED bulb, comprising: a base 1, with a lamp head 2 fixedly installed on the upper end of the base 1, and multiple sets of LED beads 5 densely distributed on the bottom of the base 1; a brightness adjustment component 3, located on the upper end of the base 1, the brightness adjustment component 3 including an adjustment groove 301, a first power board 302, a second power board 303, an adjustment block 304, a docking groove 305, a fixing plate 306, a rotating sleeve 307, a first docking plate 308, and a first power strip. 309, First contact 310, First limiting groove 311, First limiting strip 312, Wiring 313, Second docking plate 314, Second energizing strip 315, Second contact 316, Second limiting groove 317, Second limiting strip 318, Indicator 319, Reference mark 320; Locking linkage component 4, the locking linkage component 4 is located inside the brightness adjustment component 3, the locking linkage component 4 includes a movable cavity 41, a spring 42, a locking block 43, a locking groove 44, a shifting groove 45, and a connecting rod 46.

[0036] Example 2

[0037] Based on Embodiment 2, the adjustment groove 301 is located at the upper end of the base 1. The adjustment groove 301 is configured as an annular groove, and the upper end and outer side of the adjustment groove 301 penetrate the base 1. Multiple sets of first power plates 302 are arranged in an annular shape at equal intervals inside the upper end of the adjustment groove 301. The upper end of each first power plate 302 is fixedly connected to the lamp holder 2, and the upper end of each first power plate 302 is electrically connected to the lamp holder 2. Multiple sets of second power plates 303 are arranged in an annular shape at equal intervals at the bottom of the adjustment groove 301. The bottom of each second power plate 303 is fixedly connected to the side wall of the adjustment groove 301, and the bottom of each second power plate 303 is electrically connected to a different number of lamp beads 5. An adjustment ring 304 is movably arranged inside the adjustment groove 301. The adjustment ring 304 is configured as an annular structure with a T-shaped cross section. The inner diameter of the adjustment ring 304 is adapted to the adjustment groove 301, and the outer diameter of the adjustment ring 304 is larger than the outer diameter of the lamp holder 2. Multiple sets of auxiliary grooves are arranged in an annular shape at equal intervals on the outer side of the adjustment ring 304.

[0038] By connecting different numbers of LED beads 5 through the second power board 303, the first power board 302 can achieve the effect of adjusting the brightness when connected in series with the second power board 303, and the auxiliary slot can facilitate the rotation of the adjustment ring 304.

[0039] Example 3

[0040] Based on Embodiment 2, the mating groove 305 is located inside the adjusting ring 304, and the adjusting ring 304 penetrates the inner side of the mating groove 305. The mating groove 305 is configured as a vertical rectangular groove, and a fixing plate 306 is provided in the middle of the mating groove 305. The fixing plate 306 is fixedly connected to the sidewalls of the mating groove 305 on both sides. A rotating sleeve 307 is movably sleeved on the outer side of the fixing plate 306. The rotating sleeve 307 is a ring-shaped structure made of nylon, and its size is adapted to the fixing plate 306. A first mating plate 308 is fixedly connected to the upper inner side of the rotating sleeve 307. The first mating plate 308 is configured as a vertical plate-shaped structure, and its width is equal to that of the mating groove. The first mating plate 308 is fixedly connected to a first energizing strip 309, which is made of metal. Multiple sets of first contacts 310 are equidistantly arranged on the upper end of the first energizing strip 309, and the upper ends of the first contacts 310 are all in contact with the first energizing plate 302. First limiting grooves 311 are provided on both sides of the first mating plate 308. The first limiting grooves 311 are all vertical strip-shaped grooves, and their dimensions are adapted to the mating groove 305. First limiting strips 312 are provided on both sides of the first mating plate 308 corresponding to the first limiting grooves 311. The first limiting strips 312 are located inside the first limiting grooves 311. A wiring 313 is provided inside the middle of a mating plate 308. The upper end of the wiring 313 is fixedly connected to a first energizing strip 309. The bottom of the wiring 313 passes through the first mating plate 308 and extends to the outside. A second mating plate 314 is fixedly connected to the bottom of the outer side of a rotating sleeve 307. The dimensions of the second mating plate 314 are the same as those of the first mating plate 308. A second energizing strip 315 is fixedly connected to the bottom of the second mating plate 314. Multiple sets of second contacts 316 are equidistantly arranged at the bottom of the second energizing strip 315. The bottom of each second contact 316 is in contact with the corresponding second energizing plate 303. Second limiting grooves 317 are provided on both sides of the second mating plate 314. All 17 are set as vertical strip grooves. The dimensions of the second limiting groove 317 are adapted to the docking groove 305. The second docking plate 314 has a second limiting strip 318 fixedly connected to both sides of the second limiting groove 317. The second limiting strip 318 is located inside the second limiting groove 317. The indicator 319 is located outside the adjusting ring 304. The adjusting ring 304 is fixedly connected to the inside of the indicator 319. Multiple sets of reference marks 320 are equidistantly arranged on the upper end of the base 1 corresponding to the second power plate 303. The reference marks 320 are set as inclined strip structures of different colors. The base 1 is fixedly connected to the inside of the reference marks 320. The reference marks 320 are aligned with the second power plate 303.

[0041] The rotating sleeve 307, which is movably sleeved on the outside of the fixed plate 306, can easily drive the first docking plate 308 to move. The first limiting groove 311 and the first limiting strip 312 can easily limit the first docking plate 308 to prevent it from deviating when moving. The directional mark 319, together with the reference mark 320, can help the user understand the brightness adjustment status.

[0042] Example 4

[0043] Based on Embodiment 3, the movable cavity 41 is located inside the adjusting ring 304. The movable cavity 41 is a vertical rectangular cavity, and the bottom of the movable cavity 41 passes through the adjusting ring 304. A spring 42 is fixedly installed inside the movable cavity 41, and a locking block 43 is fixedly connected to the bottom of the spring 42. The locking block 43 is a rectangular block structure with a triangular bottom, and the triangular end of the bottom of the locking block 43 is rounded. A locking groove 44 is provided on the upper end of the base 1 corresponding to the locking block 43. The locking grooves 44 are all internal grooves with a triangular cross-section. The upper end of the locking grooves 44 passes through the base 1. Multiple sets of locking grooves 44 are provided corresponding to the second energized plate 303. The locking grooves 44 are all connected to the second energized plate 303. Alignment: The bottom of the locking block 43 penetrates the movable cavity 41 and extends into the corresponding locking groove 44. The upper end of the movable cavity 41 is provided with a sliding groove 45, which is a vertical L-shaped groove. The inner side of the upper end of the sliding groove 45 is connected to the docking groove 305. The sliding groove 45 is provided with a connecting rod 46, which is an L-shaped rod structure. The bottom vertical rod of the connecting rod 46 penetrates the sliding groove 45 and extends into the movable cavity 41. The bottom vertical rod of the connecting rod 46 is located in the middle of the movable cavity 41 and is fixedly connected to the upper end of the locking block 43. The upper horizontal rod of the connecting rod 46 penetrates the sliding groove 45 and extends into the docking groove 305. The inner end of the upper horizontal rod of the sliding groove 45 is fixedly connected to the outer side of the second docking plate 314.

[0044] The locking block 43, in conjunction with the locking groove 44, can easily lock the adjusting ring 304, preventing it from moving after the brightness is adjusted. The locking block 43, in conjunction with the connecting rod 46, can easily drive the second docking plate 314.

[0045] During adjustment, the adjusting ring 304 is first rotated, causing the locking block 43 to rotate. The locking block 43 rubs against the locking groove 44 through its triangular bottom, causing it to return to the movable cavity 41 and thus no longer locking the adjusting ring 304. Simultaneously, the locking block 43 pushes the connecting rod 46 upward, which in turn moves the second docking plate 314 upward, preventing the second contact 316 from contacting the second energized plate 303. At the same time, the second docking plate 314 causes the rotating sleeve 307 to rotate outside the fixed plate 306, which in turn moves the first docking plate 308, preventing the first contact 310 from contacting the first energized plate 302 during rotation. Friction between the circuit board 303 and the first contact 310 and the first energized board 302 can cause poor contact during later use. When the circuit is rotated to the desired position and the bottom of the indicator 319 is aligned with the reference indicator 320, the spring 42 pushes the locking block 43 into the locking groove 44 through its own elasticity, locking the adjusting ring 304. At the same time, the locking block 43 drives the second docking plate 314 to move downward through the connecting rod 46, so that the second contact 316 contacts the second energized board 303. Meanwhile, the second docking plate 314 drives the first docking plate 308 to move upward through the rotating sleeve 307, so that the first contact 310 contacts the first energized board 302, achieving the effect of connecting the lamp head 2 and the lamp bead 5 in series, so that the brightness of the lamp bead 5 after it is lit can be adjusted.

[0046] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention (including the claims) is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in the details for the sake of brevity.

[0047] This invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A multi-level brightness adjustable LED bulb, characterized in that, include: The base has a lamp holder fixedly installed at the top and multiple sets of LED beads densely distributed at the bottom. The brightness adjustment component is located at the upper end of the base and includes an adjustment slot, a first power board, a second power board, an adjustment block, a docking slot, a fixing plate, a rotating sleeve, a first docking plate, a first power strip, a first contact, a first limiting slot, a first limiting strip, wiring, a second docking plate, a second power strip, a second contact, a second limiting slot, a second limiting strip, a pointer, and a reference pointer. The locking linkage component is located inside the brightness adjustment component and includes a movable cavity, a spring, a locking block, a locking groove, a shifting groove, and a connecting rod. The adjustment groove is located at the upper end of the base. The adjustment groove is set as an annular groove. The upper end and the outer side of the adjustment groove both penetrate the base. Multiple sets of first power plates are arranged in an annular shape at equal intervals inside the upper end of the adjustment groove. The upper end of each first power plate is fixedly connected to the lamp holder and electrically connected to the lamp holder. The bottom of the adjustment groove is provided with multiple sets of second power boards arranged in a ring at equal intervals. The bottom of each second power board is fixedly connected to the side wall of the adjustment groove, and the bottom of each second power board is electrically connected to a different number of LED beads. An adjusting ring is movably arranged inside the adjusting groove. The adjusting ring is a ring structure with a T-shaped cross section. The inner diameter of the adjusting ring is adapted to the adjusting groove, and the outer diameter of the adjusting ring is larger than the outer diameter of the lamp head. Multiple sets of auxiliary grooves are arranged in a ring at equal intervals on the outer side of the adjusting ring. The docking groove is located inside the adjusting ring, and the adjusting ring passes through the inner side of the docking groove. The docking groove is set as a vertical rectangular groove. A fixing plate is set in the middle of the docking groove. The side walls of the docking groove are fixedly connected to both sides of the fixing plate. A rotating sleeve is movably sleeved on the outer side of the fixing plate. The rotating sleeve is set as a ring structure made of nylon material. The size of the rotating sleeve is adapted to the fixing plate. The upper inner side of the rotating sleeve is fixedly connected to a first mating plate. The first mating plate is configured as a vertical plate structure. The width of the first mating plate is adapted to the mating groove. A first energizing strip is fixedly connected to the upper end of the first mating plate. The first energizing strip is made of metal. Multiple sets of first contacts are equidistantly arranged on the upper end of the first energizing strip. The upper ends of the first contacts are all in contact with the first energizing plate. A first limiting groove is provided on both sides of the first mating plate. The first limiting groove is configured as a vertical strip groove. The size of the first limiting groove is adapted to the mating groove. A first limiting strip is provided on both sides of the first mating plate corresponding to the first limiting groove. The first limiting strip is located inside the first limiting groove. A wiring is provided in the middle of the first mating plate. The upper end of the wiring is fixedly connected to the first energizing strip. The bottom of the wiring passes through the first mating plate and extends to the outside. The outer bottom of the rotating sleeve is fixedly connected to a second mating plate. The dimensions of the second mating plate are the same as those of the first mating plate. A second energizing strip is fixedly connected to the bottom of the second mating plate. Multiple sets of second contacts are equidistantly arranged at the bottom of the second energizing strip. The bottom of each second contact is in contact with the corresponding second energizing plate. A second limiting groove is provided on both sides of the second mating plate. The second limiting groove is set as a vertical strip groove. The dimensions of the second limiting groove are adapted to the mating groove. A second limiting strip is fixedly connected to both sides of the second mating plate corresponding to the second limiting groove. The second limiting strip is located inside the second limiting groove. The pointer is located outside the adjustment ring, and the adjustment ring is fixedly connected to the inside of the pointer. Multiple sets of reference marks are equidistantly arranged at the upper end of the base corresponding to the second power board. The reference marks are set as inclined strip structures of different colors. The base is fixedly connected to the inside of each reference mark, and the reference marks are all aligned with the second power board. The movable cavity is located inside the adjusting ring. The movable cavity is a vertical rectangular cavity. The bottom of the movable cavity passes through the adjusting ring. A spring is fixedly installed inside the movable cavity. A locking block is fixedly connected to the bottom of the spring. The locking block is a rectangular block structure with a triangular bottom. The triangular end of the locking block is rounded. A locking groove is provided on the upper end of the base corresponding to the locking block. The locking groove is a triangular groove. The upper end of the locking groove passes through the base. Multiple sets of locking grooves are provided corresponding to the second power board. The locking grooves are aligned with the second power board. The bottom of the locking block passes through the movable cavity and extends into the corresponding locking groove. The upper end of the movable cavity is provided with a sliding groove, which is a vertical L-shaped groove. The inner side of the upper end of the sliding groove is connected to the docking groove. The sliding groove is provided with a connecting rod, which is an L-shaped rod structure. The bottom vertical rod of the connecting rod passes through the sliding groove and extends into the movable cavity. The bottom vertical rod is located in the middle of the movable cavity and is fixedly connected to the upper end of the locking block. The upper horizontal rod of the connecting rod passes through the sliding groove and extends into the docking groove. The inner end of the upper horizontal rod of the sliding groove is fixedly connected to the outer side of the second docking plate.

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