Light-condensing LED (light-emitting diode) patch lamp bead

Abstract

The invention discloses a condensation LED patch lamp bead, and belongs to the technical field of LED patch lamp beads, the condensation LED patch lamp bead comprises a PCB, an LED lamp bead, a support, a lens and a sliding part, the sliding part freely slides in a sliding opening, and the sliding part is provided with a plurality of substrate assembling openings; the glass substrates are installed in the substrate assembling openings, and fluorescent powder glue of different colors is stored in inner cavities of the multiple glass substrates so that the LED lamp beads can emit light of different colors; and the color matching unit is arranged on the bracket and is used for driving the sliding part to slide in the sliding opening, so that the plurality of glass substrates alternately move to correspond to the LED lamp beads. According to the LED lamp bead, the sliding part slides in the sliding opening, so that the multiple pieces of glass basically and alternately move to the light transmitting opening, fluorescent powder glue of different colors is matched, the light of the LED lamp bead shows different colors after penetrating through the fluorescent powder glue, and then the use requirement that in actual use, the light color of a single LED lamp bead can be changed is met.

Description

Technical Field

[0001] The invention belongs to the technical field of LED patch lamp beads, and in particular relates to a focusing LED patch lamp bead. Background Art

[0002] SMD LED, also known as SMD LED, is a simple lamp. Its luminous principle is to pass current through compound semiconductors. Through the combination of electrons and holes, the excess energy will be released in the form of light to achieve the luminous effect.

[0003] When existing SMD LEDs need to emit different colors of light, they are typically coated with phosphor glue. Different colors of phosphor glue can produce different light colors. Phosphor glue is a material made of a mixture of phosphor particles and silica gel and is widely used in LED packaging. Its luminescence principle is as follows: When the LED emits blue light, the phosphor absorbs some of the blue light and, through energy conversion, converts it into other colors (such as yellow or green). Ultimately, this converted light mixes with the remaining blue light to form white light or other colors. The luminescence characteristics of different phosphor glue colors: The color of the phosphor glue depends on the type and composition of the phosphor. Different phosphors have different excitation and emission spectra, resulting in different light colors: Yellow phosphors absorb blue light and emit yellow light and are commonly used in white light LEDs. Green phosphors absorb blue light and emit green light and are used to create green LEDs. Red phosphors absorb blue light and emit red light and are commonly used to create red LEDs or to improve the color rendering index of white light. Multicolor phosphors: By mixing different phosphors, more complex colors can be emitted, such as purple, orange, etc. For example, in white light LEDs, common phosphors convert blue light into yellow light, and the yellow light and blue light mix to form white light.

[0004] However, currently a single LED lamp bead can only be coated with one type of phosphor glue, which makes it impossible to meet the usage requirements when the light color needs to be changed. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a focusing LED chip lamp bead.

[0006] The technical solution adopted to solve the above technical problems is: a focusing LED chip lamp bead, including an LED lamp bead soldered on a PCB board, and also including:

[0007] A bracket is fixed to the PCB board through pins, the LED lamp bead is located between the bracket and the PCB board, the bracket is provided with a light-transmitting opening for the LED lamp bead to pass freely, and the side wall of the bracket is provided with a sliding opening;

[0008] A lens mounted on the surface of the bracket, wherein the optical center of the lens is aligned with the optical center of the LED lamp bead;

[0009] A sliding portion is mounted in the sliding opening, the sliding portion slides freely in the sliding opening, and the sliding portion is provided with a plurality of substrate assembly openings;

[0010] A glass substrate is installed in the substrate assembly port, wherein the inner cavities of the multiple glass substrates respectively store phosphor glue of different colors, so that the LED lamp beads emit light of different colors;

[0011] A color adjustment unit is provided on the bracket, and is used for driving the sliding portion to slide in the sliding opening, so that the plurality of glass substrates are alternately moved to correspond to the LED lamp beads.

[0012] Through the above technical solution, the sliding part slides in the sliding opening, so that multiple glasses are basically moved to the light-transmitting opening alternately. Combined with different colors of fluorescent glue, the light of the LED lamp bead presents different colors after passing through the fluorescent glue, thereby meeting the actual use requirement that a single LED lamp bead can change the color of the light.

[0013] Furthermore, a plurality of elastic sheets are fixedly connected to the outer wall of the bracket, and an installation space for the lens to be clamped and installed is formed between the plurality of elastic sheets.

[0014] Through the above technical solution, the elastic sheet generates a clamping force on the lens, so that the lens can be firmly mounted on the bracket.

[0015] Furthermore, the color adjustment unit includes a micro motor installed on the PCB board, the motor shaft of the micro motor penetrates the PCB board and the bracket, a gear is installed at the end of the motor shaft of the micro motor, the sliding part is provided with a clearance groove for the gear to pass freely, and a rack part is provided on the inner wall of one side of the clearance groove, and the rack part is engaged with the gear.

[0016] Through the above technical solution, the motor shaft of the micro motor rotates, driving the gear to rotate. When the gear rotates, the gear and the rack part engage, thereby driving the sliding part to slide in the sliding opening, so as to achieve alternating coordination between different colors of phosphor glue and LED lamp beads.

[0017] Furthermore, a shielding portion is provided at one end of the sliding portion, and the bracket is provided with a driving unit, which imparts movement to the sliding portion so that the shielding portion has potential energy to move toward the light-transmitting port, and the gear is provided with a clutch unit, which is used to disconnect the gear from the motor shaft of the micromotor when the glass substrate is heated to a threshold value, so that the driving unit drives the shielding portion to move to the light-transmitting port.

[0018] Through the above technical solution, LED lamp beads may generate a lot of heat when used for a long time. When the fluorescent glue is subjected to a large amount of heat, a colloid decomposition phenomenon will occur. Therefore, through the setting of the clutch unit and the drive unit, when the glass substrate is heated to a threshold value, the clutch unit will cause the gear to be disconnected from the motor shaft of the micro motor, that is, the gear can rotate freely on the motor shaft of the micro motor. At this time, when the sliding part is driven by the driving force of the drive unit, the sliding part can slide in the sliding opening, thereby allowing the shielding part to move to the light-transmitting opening to block the light of the LED lamp beads, thereby reminding the staff that the heat of the LED lamp beads is large and will affect the fluorescent glue.

[0019] Furthermore, the clutch unit includes a short shaft coaxially fixed to the end of the motor shaft of the micro motor, the end face of the gear is provided with an accommodating cavity for the free passage of the short shaft, the inner diameter of the accommodating cavity is larger than the outer diameter of the short shaft, and the short shaft is provided with an interlocking component for making the gear and the motor shaft of the micro motor rotate synchronously.

[0020] Through the above technical solution, when the interlocking assembly is in action, the gear can rotate freely on the short shaft, so that the resistance to the horizontal movement of the sliding part in the sliding opening disappears.

[0021] Furthermore, the interlocking assembly includes a fixing ring fixedly sleeved on the periphery of the short shaft, and a plurality of memory metal rods are arranged in an axial array along the periphery of the fixing ring. The wall surface of the accommodating cavity is provided with a slot for the memory metal rod to engage with. When the memory metal rod is heated to a threshold value, it will deform toward the radial inner side of the short shaft, so that the memory metal rod is out of the state of being engaged with the slot.

[0022] Through the above technical solution, when the heat reaches a threshold, the memory metal rod will be deformed and bent toward the radial inner side of the short shaft, so that the memory metal rod will be disengaged from the engagement state with the slot. At this time, when the motor shaft of the micromotor rotates, it will not drive the gear to rotate. In other words, since the gear and the rack part are in a meshing state, when the motor shaft of the micromotor rotates, the resistance of the meshing of the rack part and the gear is greater than the surface friction between the short shaft and the gear, so the motor shaft of the micromotor will not continue to drive the gear to rotate.

[0023] Furthermore, a mounting groove is provided at the end of the gear, a cover plate is mounted in the mounting groove, the cover plate is freely rotatable in the mounting groove, and the cover plate is detachably connected to the end of the short shaft.

[0024] Through the above technical solution, by setting the cover plate, the axial movement of the gear along the short shaft can be limited to prevent the gear from being separated from the short shaft.

[0025] Furthermore, the driving unit includes a first ear block fixedly connected to the bottom of the sliding portion, a strip-shaped through groove is opened on the outer wall of the bracket for the first ear block to pass freely, a second ear block is fixedly connected to the outer wall of the bracket, and an elastic member is provided between the first ear block and the second ear block, and the elastic member gives the first ear block potential energy to move in a direction away from the second ear block.

[0026] Through the above technical solution, the elastic part generates an elastic resistance force on the first ear block, so that the sliding part can move toward the light-transmitting opening, and then the shielding part can move to the light-transmitting opening to block the light emitted by the LED lamp bead.

[0027] Furthermore, the elastic member is a spring provided between the first ear block and the second ear block, and two ends of the spring in the direction of elastic force elastically press against the first ear block and the second ear block respectively.

[0028] Through the above technical solution, the spring generates an elastic resisting force on the first ear block, so that the first ear block can generate potential energy to drive the sliding part to move.

[0029] Furthermore, a guide column is horizontally fixed to the outer wall of the second ear block, the guide column slidably penetrates the first ear block, and the spring sleeve is wrapped around the periphery of the guide column.

[0030] Through the above technical solution, due to the provision of the guide column, the spring will not bend outward when it is elastically deformed.

[0031] The beneficial effects of the present invention are as follows:

[0032] 1. In the present invention, the sliding portion slides within the sliding opening, so that the multiple glasses are basically moved alternately to the light-transmitting opening. In combination with phosphor glue of different colors, the light of the LED lamp beads presents different colors after passing through the phosphor glue, thereby meeting the actual use requirement that a single LED lamp bead can change the color of light;

[0033] 2. In the present invention, LED lamp beads may generate a lot of heat when used for a long time. When the phosphor glue is subjected to a large amount of heat, the colloid decomposition phenomenon will occur. Therefore, through the arrangement of the clutch unit and the drive unit, when the glass substrate is heated to a threshold value, the clutch unit will cause the gear to be disconnected from the motor shaft of the micro motor, that is, the gear can rotate freely on the motor shaft of the micro motor. At this time, when the sliding part is driven by the driving force of the drive unit, the sliding part can slide within the sliding opening, thereby allowing the shielding part to move to the light-transmitting opening to block the light of the LED lamp beads, thereby reminding the staff that the heat of the LED lamp beads is large and will affect the phosphor glue;

[0034] 3. In the present invention, when the memory metal rod is heated to a threshold value, it will deform and bend toward the radial inner side of the short shaft, so that the memory metal rod is disengaged from the engagement state with the slot. At this time, when the motor shaft of the micromotor rotates, it will not drive the gear to rotate. In other words, since the gear and the rack are in meshing state, when the motor shaft of the micromotor rotates, the resistance of the meshing of the rack and the gear is greater than the surface friction between the short shaft and the gear, so the motor shaft of the micromotor will not continue to drive the gear to rotate. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the overall structure of a concentrated LED patch lamp bead in an embodiment of the present invention;

[0036] Figure 2 yes Figure 1 Schematic diagram of the position relationship of the first perspective;

[0037] Figure 3 yes Figure 1 Schematic diagram of the positional relationship of the second perspective;

[0038] Figure 4 This is a schematic diagram of the positional relationship between the lens and the bracket after assembly in the present invention;

[0039] Figure 5 yes Figure 4 A schematic diagram of the positional relationship from another perspective;

[0040] Figure 6 It is a schematic structural diagram of the bracket in the present invention;

[0041] Figure 7 yes Figure 6 A schematic diagram of the positional relationship from another perspective;

[0042] Figure 8 This is a schematic diagram of the positional relationship between the sliding portion and the micro motor after assembly in the present invention;

[0043] Figure 9 yes Figure 8 A schematic diagram of the positional relationship from another perspective;

[0044] Figure 10 This is a schematic diagram of the positional relationship between the micro motor and the gear after assembly in the present invention;

[0045] Figure 11 yes Figure 10 Schematic diagram of the exploded structure;

[0046] Figure 12 yes Figure 11 A magnified schematic diagram of the local structure at point A;

[0047] Figure 13It is a structural schematic diagram of the sliding portion of the present invention;

[0048] Figure 14 It is a schematic structural diagram of the glass substrate after being cut open in the present invention.

[0049] Figure numerals: 1, PCB board; 2, sliding port; 3, pin; 4, elastic sheet; 5, lens; 6, bracket; 7, micro motor; 8, sliding part; 9, LED lamp bead; 10, strip-shaped through groove; 11, guide column; 12, first ear block; 13, spring; 14, second ear block; 15, light-transmitting port; 16, glass substrate; 17, air-avoiding groove; 18, rack part; 19, gear; 20, cover plate; 21, short shaft; 22, memory metal rod; 23, fixing ring; 24, slot; 25, accommodating cavity; 26, substrate assembly port; 27, mounting slot. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0051] like Figures 1-14 As shown, this embodiment provides: a focusing LED chip lamp bead, including an LED lamp bead 9 welded on a PCB board 1, the chip-type LED lamp bead 9 in this embodiment is a medium-to-large size model, a bracket 6 is fixedly mounted on the PCB board 1 by welding a plurality of pins 3, the bracket 6 is mounted on the PCB board 1 in a suspended state, the LED lamp bead 9 is located between the bracket 6 and the PCB board 1, and the LED is located below the bracket 6, and the bracket 6 is provided with a light-transmitting opening 15 for the LED lamp bead 9 to pass freely, a sliding opening 2 is provided on the side wall of the bracket 6, and the sliding opening 2 passes through the outer walls of both sides of the bracket 6, a plurality of elastic sheets 4 are fixedly connected to the surface of the bracket 6 in an array along the axial direction of the light-transmitting opening 15, an installation space is enclosed between the plurality of elastic sheets 4, a lens 5 is installed in the installation space, and the optical center of the lens 5 is aligned with the optical center of the LED lamp bead 9;

[0052] The sliding portion 8 is mounted in the sliding opening 2 and is free to slide in the sliding opening 2. The sliding portion 8 is provided with a plurality of substrate assembly openings 26. Figure 8As shown, the left side of the sliding portion 8 is a shielding portion, and a glass substrate 16 is fixedly mounted in the substrate assembly opening 26. The lower surface of the glass substrate 16 is in contact with the upper surface of the LED lamp bead 9, thereby preventing the glass substrate 16 and the LED lamp bead 9 from generating water vapor on the opposite sides thereof and affecting the light. The inner cavity of the glass substrate 16 stores phosphor glue, which is solidified or semi-solidified. The color of the phosphor glue in each glass substrate 16 is different. In this embodiment, the number of glass substrates 16 is set to two, but of course it can also be set to other numbers. There is no specific limitation here. The light emitted by the LED lamp bead 9 will produce a corresponding color after passing through the phosphor glue. Therefore, the color of the light of the LED lamp bead 9 can be adjusted by replacing different phosphor glues.

[0053] A micro motor 7 is mounted at the bottom of the PCB board 1. The motor shaft of the micro motor 7 penetrates the PCB board 1 and the bracket 6. A short shaft 21 is coaxially fixed to the end of the motor shaft of the micro motor 7. A gear 19 is mounted on the periphery of the short shaft 21. The gear 19 is coaxially provided with a receiving cavity 25 for the short shaft 21 to pass freely. In addition, a blind hole-shaped mounting groove 27 is provided on the upper end face of the gear 19. A through hole is provided on the bottom wall of the mounting groove 27 for the short shaft 21 to pass freely. In addition, a locking device is mounted in the mounting groove 27. A cover plate 20 is installed, and the cover plate 20 can rotate freely in the installation groove 27. A screw is installed on the end surface of the cover plate 20. The screw passes through the cover plate 20 and is threadedly connected to the short shaft 21, thereby detachably connecting the cover plate 20 and the short shaft 21. The limit of the cover plate 20 prevents the gear 19 from being separated from the short shaft 21. The sliding portion 8 is provided with an escape groove 17 for the gear 19 to pass freely. A rack portion 18 is provided on the inner wall of one side of the escape groove 17, and the rack portion 18 is engaged with the gear 19;

[0054] A fixing ring 23 is fixedly sleeved on the periphery of the short shaft 21. The fixing ring 23 is located in the accommodating cavity 25. A plurality of memory metal rods 22 are arranged in an axial array along the periphery of the fixing ring 23. A card slot 24 for the memory metal rod 22 to engage with the wall of the accommodating cavity 25 is provided. When the memory metal rod 22 is heated to a threshold value, it will deform radially inwardly of the short shaft 21, causing the memory metal rod 22 to break away from the engagement with the card slot 24. When the memory metal rod 22 is heated to a threshold value, it will deform. The memory metal rod 22 is bent toward the radial inner side of the short shaft 21, so that the memory metal rod 22 is out of engagement with the slot 24. At this time, when the motor shaft of the micro motor 7 rotates, it will not drive the gear 19 to rotate. In other words, since the gear 19 is in meshing state with the rack portion 18, when the motor shaft of the micro motor 7 rotates, the meshing resistance of the rack portion 18 and the gear 19 is greater than the surface friction between the short shaft 21 and the gear 19. Therefore, the motor shaft of the micro motor 7 will not continue to drive the gear 19 to rotate.

[0055] A first ear block 12 is fixed to the bottom of the sliding portion 8, and a strip-shaped through groove 10 is opened on the outer wall of the bracket 6 for the first ear block 12 to pass freely. A second ear block 14 is fixed to the outer wall of the bracket 6, and a guide column 11 is horizontally fixed to the outer wall of the second ear block 14. The guide column 11 slidably penetrates the first ear block 12, and a spring 13 is provided between the first ear block 12 and the second ear block 14. The spring 13 is wrapped around the periphery of the guide column 11, and the two ends of the spring 13 in the elastic force direction elastically press against the first ear block 12 and the second ear block 14 respectively. The spring 13 generates an elastic pressing force on the first ear block 12, so that the first ear block 12 can generate potential energy to drive the sliding portion 8 to move. In addition, due to the arrangement of the guide column 11, the spring 13 will not bend toward its outside when it is elastically deformed, that is, it will not bend toward the radial outside of the guide column 11.

[0056] The working principle of this embodiment is as follows:

[0057] When it is necessary to replace the fluorescent powder glue of different colors, the micro motor 7 is first started, and the motor shaft of the micro motor 7 rotates. Through the engagement of the memory metal rod 22 and the card slot 24, the motor shaft drives the gear 19 to rotate. When the gear 19 rotates, the meshing transmission effect between the gear 19 and the rack part 18 is used to drive the sliding part 8 to slide in the sliding opening 2. During the sliding process, the spring 13 will produce corresponding extension or contraction deformation, so that the spring 13 accumulates elastic potential energy. After the sliding part 8 slides into place, one of the glass substrates 16 will move to the light transmission opening 15. In this way, the fluorescent powder glue in the inner cavity of the glass substrate 16 cooperates with the light of the LED lamp bead 9 to emit light of the corresponding color, so that the use demand of different color lights can be met without replacing the LED lamp bead 9. In addition, after the light passes through the lens 5, a focusing effect will be produced, making the light more concentrated. In addition, the micro motor 7 can be automatically controlled by the existing technology so that it rotates according to the preset time to achieve the management of light of different colors.

[0058] In addition, since the LED lamp bead 9 generates a large amount of heat during long-term use, the fluorescent powder glue will decompose when subjected to a large amount of heat. Therefore, when the heat is large, the memory metal rod 22 is deformed by the heat, and then bends and deforms towards the radial inner side of the short shaft 21, and the memory metal rod 22 is disengaged from the clamping state with the clamping groove 24. In this way, the gear 19 can rotate freely on the short shaft 21, and the elastic potential energy accumulated by the spring 13 will be released. Since the gear 19 can engage and drive the gear part 18 at this time, the first lug 12 is driven by the elastic resistance of the spring 13, and the sliding part 8 is moved towards the light transmission port 15, so that the shielding part on the sliding part 8 moves to the light transmission port 15 to shield the light of the LED lamp bead 9. In this way, the staff can be prompted that the heat of the LED lamp bead 9 is large and will affect the fluorescent powder glue. In the embodiment, the material of the memory metal rod 22 can be selected by those skilled in the art according to the specific situation, and will not be repeated here.

[0059] When the heat decreases, the memory metal rod 22 bends and deforms in the opposite direction, and then the micro motor 7 is started. With the rotation of the motor shaft and the short shaft 21, the memory metal rod 22 is finally clamped into the clamping groove 24, so that the short shaft 21 can drive the gear 19 to rotate when rotating. When the gear 19 rotates, the gear 19 and the gear part 18 on the sliding part 8 are engaged and driven, and then the sliding part 8 is reversely slid in the sliding port 2 to reset, that is, the shielding part is away from the light transmission port 15. The staff can start the micro motor 7 according to the use requirement, so that the micro motor 7 can drive the sliding part 8 to slide to the appropriate position, so that the glass substrate 16 moves to the light transmission port 15, and then the fluorescent powder glue in the inner cavity of the glass substrate 16 cooperates with the light emitted by the LED lamp bead 9 to emit light of corresponding color.

[0060] The above is only a preferred embodiment of the present application, and is not used to limit the protection scope of the present application.

Claims

1. A focusing LED chip lamp bead, comprising an LED lamp bead (9) welded on a PCB board (1), characterized in that: Also includes: A bracket (6) is fixedly connected to the PCB board (1) via a pin (3); the LED lamp bead (9) is located between the bracket (6) and the PCB board (1); the bracket (6) is provided with a light-transmitting opening (15) for the LED lamp bead (9) to pass freely; and a sliding opening (2) is provided on a side wall of the bracket (6); A lens (5) is mounted on the surface of the bracket (6), wherein the optical center of the lens (5) is aligned with the optical center of the LED lamp bead (9); A sliding portion (8) is snap-fitted and installed in the sliding opening (2), the sliding portion (8) slides freely in the sliding opening (2), and the sliding portion (8) is provided with a plurality of substrate assembly openings (26); A glass substrate (16) is installed in the substrate assembly port (26), wherein the inner cavities of the plurality of glass substrates (16) respectively store fluorescent powder glue of different colors, so that the LED lamp beads (9) emit light of different colors; A color adjustment unit is provided on the bracket (6), and is used to drive the sliding portion (8) to slide in the sliding opening (2), so that the plurality of glass substrates (16) are alternately moved to correspond to the LED lamp beads (9).

2. A spotlight LED chip lamp bead according to claim 1, characterized in that: A plurality of elastic sheets (4) are fixedly connected to the outer wall of the bracket (6), and an installation space for the lens (5) to be snap-fitted and installed is formed between the plurality of elastic sheets (4).

3. The spotlight LED chip lamp bead according to claim 1, characterized in that: The color adjustment unit comprises a micro motor (7) mounted on the PCB board (1), the motor shaft of the micro motor (7) penetrates the PCB board (1) and the bracket (6), a gear (19) is mounted on the end of the motor shaft of the micro motor (7), the sliding portion (8) is provided with a free groove (17) for the gear (19) to pass freely, a rack portion (18) is provided on the inner wall of one side of the free groove (17), and the rack portion (18) is engaged with the gear (19).

4. The spotlight LED chip lamp bead according to claim 3, characterized in that: A shielding portion is provided at one end of the sliding portion (8), the bracket (6) is provided with a driving unit, the driving unit imparting movement to the sliding portion (8) so that the shielding portion has potential energy to move toward the light-transmitting opening (15), and the gear (19) is provided with a clutch unit, the clutch unit being used to disconnect the gear (19) from the motor shaft of the micro-motor (7) when the glass substrate (16) is heated to a threshold value, so that the driving unit drives the shielding portion to move toward the light-transmitting opening (15).

5. The spotlight LED chip lamp bead according to claim 4, characterized in that: The clutch unit comprises a short shaft (21) coaxially fixed to the end of the motor shaft of the micro motor (7); an accommodating cavity (25) for the free passage of the short shaft (21) is provided on the end face of the gear (19); the inner diameter of the accommodating cavity (25) is larger than the outer diameter of the short shaft (21); and the short shaft (21) is provided with an interlocking assembly for causing the gear (19) and the motor shaft of the micro motor (7) to rotate synchronously.

6. The spotlight LED chip lamp bead according to claim 5, characterized in that: The interlocking assembly comprises a fixing ring (23) fixedly sleeved on the periphery of the short shaft (21); a plurality of memory metal rods (22) are arranged in an axial array along the periphery of the fixing ring (23); a wall surface of the accommodating cavity (25) is provided with a card slot (24) for the memory metal rods (22) to engage; when the memory metal rods (22) are heated to a threshold value, they will deform radially inward of the short shaft (21), so that the memory metal rods (22) are out of the state of being engaged with the card slot (24).

7. The spotlight LED chip lamp bead according to claim 6, characterized in that: The end of the gear (19) is provided with a mounting groove (27), a cover plate (20) is mounted in the mounting groove (27), the cover plate (20) is freely rotatable in the mounting groove (27), and the cover plate (20) is detachably connected to the end of the short shaft (21).

8. The spotlight LED chip lamp bead according to claim 4, characterized in that: The driving unit comprises a first ear block (12) fixedly connected to the bottom of the sliding portion (8); an outer wall of the bracket (6) is provided with a strip-shaped through slot (10) for the first ear block (12) to freely pass through; a second ear block (14) is fixedly connected to the outer wall of the bracket (6); an elastic member is provided between the first ear block (12) and the second ear block (14); the elastic member imparts potential energy to the first ear block (12) to move in a direction away from the second ear block (14).

9. The focusing LED chip lamp bead according to claim 8, characterized in that: The elastic member is a spring (13) provided between the first ear block (12) and the second ear block (14), and both ends of the spring (13) in the elastic force direction elastically press against the first ear block (12) and the second ear block (14) respectively.

10. The spotlight LED chip lamp bead according to claim 9, characterized in that: A guide column (11) is fixedly connected horizontally to the outer wall of the second ear block (14), the guide column (11) slidably penetrates the first ear block (12), and the spring (13) is wrapped around the periphery of the guide column (11).

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