Anti-creeping spring lamp holder

Abstract

The utility model discloses an anti-creeping spring lamp holder, which relates to the lighting field, the anti-creeping spring lamp holder comprises a shell and a pin, the shell wraps one end of a circuit board, the pin is fixedly installed with the shell and the circuit board, the middle part of the shell is provided with a top block installation hole, and the top block installation hole is provided with a top block. A conduction top block is movably installed on the top block installation hole, one end of the conduction top block is located on the outer side of the shell, and the other end of the conduction top block is located on the inner side of the shell. The on-off control assembly of the anti-creeping spring lamp holder is located in the lamp tube and does not occupy extra installation space. In the installation process, due to the fact that contact parts outside the lamp tube are all made of insulating materials, the lamp tube cannot generate electric leakage due to conduction when the lamp tube is installed, the lamp tube cannot be conducted before correct installation is completed, and the possibility of electric leakage of the lamp tube is further eradicated.

Description

Technical Field

[0001] This utility model relates to the field of lighting, specifically to a leakage-proof spring lamp holder as a component of a lighting device. Background Technology

[0002] Leakage current refers to a small current that flows in a circuit or device through a path it shouldn't, caused by factors such as material properties, manufacturing processes, or external conditions. This leakage current can affect the normal operation of the circuit, leading to decreased equipment performance or malfunction. In the lighting industry, eliminating leakage current is a requirement for the design of double-ended lamps. Although leakage current is small, it poses a significant threat to the safety of installation and operation personnel.

[0003] In existing technologies, leakage current issues in lamps are addressed by installing a leakage current detection chip inside the lamp tube and controlling its on / off state externally via a plug or a DIP switch. For example, the "Safety Lamp Holder and Fixture Against Electric Shock" disclosed in patent CN204901685U requires pressing a second pressing component to power on the lamp tube; however, this second pressing component is located outside the lamp tube, damaging its structure. This has a significant negative impact on the transportation, storage, and production of the lamp tube. Utility Model Content

[0004] The purpose of this invention is to provide a leakage-proof spring lamp holder. The leakage-proof structure of this lamp holder is located inside the lamp tube, and the lamp tube's conductivity is achieved through the movement of the internal structure. A further purpose of this invention is to ensure that all externally accessible parts of the lamp tube are made of insulating material, avoiding the risk of electric shock to people due to lamp tube leakage. Another purpose of this invention is to completely control the lamp tube's on / off state during installation through the physical structure within the lamp holder, improving the stability, operability, and safety of the control.

[0005] This utility model achieves the above-mentioned technical objectives through the following technical means.

[0006] A leakage-proof spring lamp holder includes a housing and pins. The housing covers one end of a circuit board, and the pins are fixedly installed with the housing and the circuit board. A top block mounting hole is provided in the middle of the housing, and a conductive top block is movably installed on the top block mounting hole. One end of the conductive top block is located on the outside of the housing, and the other end is located on the inside of the housing.

[0007] Furthermore, the central part of the conductive top block is a hollow concentric cylindrical structure.

[0008] The outer side of the conductive top block has a protrusion that mates with the mounting hole of the top block.

[0009] Furthermore, the interlayer position of the concentric cylindrical structure of the conductive top block is a spring slot, and a spring is provided in the spring slot. One end of the spring cooperates with the inner wall of the conductive top block, and the other end of the spring cooperates with the bottom of the mounting hole of the top block.

[0010] Furthermore, the end of the conductive top block located on the inner side of the outer shell cooperates with the top plate, and a connector is provided between the top plate and the conductive top block for fixed connection.

[0011] Furthermore, the top plate has parallel connecting copper plates at both ends, and the distance between the ends of the connecting copper plates gradually narrows.

[0012] Furthermore, the circuit board is provided with a plug-in base, and the two ends of the plug-in base are provided with pins perpendicular to the circuit board. The pins are located on the outer side of the two connecting copper plates, and the distance between the inner surfaces of the two pins is slightly smaller than the distance between the outer surfaces of the two connecting copper plates.

[0013] Furthermore, the pins are electrically connected to the circuit board, and the plug base is an insulating device.

[0014] Furthermore, one end of the pin extends out of the housing, and the other end of the pin is electrically connected to the circuit board. The protruding portion of the pin located outside the housing is fitted with a pin housing.

[0015] The pin housing is hollow and its length is greater than the protruding portion of the pin.

[0016] Preferably, the top plate is made of a conductive material, and the connector, the conductive top block, and the outer shell are made of an insulating material.

[0017] Furthermore, the pin housing is fixedly installed with the housing, and the pin housing is made of insulating material.

[0018] This utility model has the following beneficial effects:

[0019] Compared to similar technologies, the on / off control component of this anti-leakage spring lamp holder is located inside the lamp tube, without occupying additional installation space. Furthermore, as the installation process proceeds, the on / off control component inside the lamp holder gradually approaches, establishing a circuit connection between the lamp tube and the lamp holder once the lamp tube is properly installed. During installation, because all accessible parts of the lamp tube are made of insulating material, the lamp tube will not leak electricity due to conductivity during installation, and it will not conduct electricity until it is correctly installed, further eliminating the possibility of lamp tube leakage. Attached Figure Description

[0020] Figure 1 This is a front sectional view of the lamp holder mounting position of this utility model.

[0021] Figure 2 This is a side view of the present invention.

[0022] In the diagram, 1-conducting top block, 2-top plate, 3-connector, 4-pin, 5-plug base, 6-connecting copper sheet, 7-shell, 8-pin, 9-pin shell, 10-spring slot, 11-spring, 12-circuit board, 13-top block mounting hole. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but the scope of protection of the present invention is not limited thereto.

[0024] Example 1:

[0025] Electrical safety of lighting fixtures, especially during the installation and replacement of lamps, is a key aspect that needs to be considered in product design. Traditional lamp installation methods may pose a risk of electric shock during operation, especially if the power supply is not completely disconnected or if the operation is not performed correctly. To improve the safety of lamp installation, this embodiment proposes a leakage-proof spring lamp holder structure, designed to minimize the possibility of electric shock to operators during lamp installation and removal. This design focuses on achieving power-off protection during installation through the internal physical structure of the lamp.

[0026] This utility model discloses a leakage-proof spring lamp holder, including a housing 7 and pins 8. The housing 7 covers one end of a circuit board 12, and the pins 8 are fixedly installed with the housing 7 and the circuit board 12. A top block mounting hole 13 is provided in the middle of the housing 7, and a conductive top block 1 is movably installed on the top block mounting hole 13. One end of the conductive top block 1 is located on the outside of the housing 7, and the other end is located on the inside of the housing 7.

[0027] The leakage protection design of this anti-leakage spring lamp holder lies in its safe conduction mechanism, which ensures that the circuit remains safely disconnected during specific stages of lamp installation. The leakage protection design of the lamp holder mainly includes components such as the housing 7, pins 8, conducting top block 1, top plate 2, connector 3, pins 4, plug base 5, connecting copper sheet 6, spring 11, and pin housing 9.

[0028] The outer casing 7, as the peripheral structural component of the lamp holder, is made of insulating material. Its main functions are to provide structural support, protect the internal circuit board 12, and form the outermost layer of insulation protection for the lamp holder. The outer casing 7 covers one end of the circuit board 12, forming the internal structural space of the lamp holder. A top block mounting hole 13 is recessed on the outer casing 7 for mounting the conductive top block 1 and guiding the movement of the conductive top block 1.

[0029] Pin 8 is the interface connecting the circuit board 12 in the lamp tube to the external circuit system. It is inserted into the housing 7 and connected to the circuit board 12 via electrical circuitry. To improve safety, the portion of pin 8 extending out of the housing 7 is covered by a pin housing 9. Pin housing 9 is also made of insulating material and is longer than the exposed metal portion of pin 8, thus forming an additional insulating layer on the outside of the lamp holder, reducing the risk of accidental contact with live pins. Simultaneously, to ensure proper connection between pin 8 and the live and neutral wires, pin housing 9 is a hollow sleeve design, allowing the terminal of the lamp holder to extend through the opening in pin housing 9 and contact pin 8, thus establishing conductivity. The pin housing 9 is fixedly connected to the housing 7, preventing the exposure of the lamp tube and internal conductors in the lamp holder, further reducing the risk of leakage.

[0030] The conductive top block 1 is a crucial component of this invention for controlling the continuity of the internal circuitry of the lamp tube during installation. The conductive top block 1 is made of insulating material and has a hollow concentric cylindrical structure on its inner side. The interlayer between the concentric cylinders is a spring slot 10. A spring 11 is placed in the spring slot 10, with one end of the spring 11 contacting the inner wall of the end of the conductive top block 1, and the other end abutting against the bottom inner wall of the top block mounting hole 13.

[0031] When the lamp tube is not installed or is just beginning to be installed, the conductive top block 1 remains in an outward-extending state. Even if brief, accidental pressure is applied to the conductive top block 1, it will pop out after being temporarily pressed into the housing 7 and remain in the extended state. In this state, the circuit connection between the conductive top block 1 and the circuit board 12 is broken, and the lamp tube circuit is in an open state. Even if the external power supply of the lamp is connected, because there is no direct contact between the connecting copper plate 6 and the pin 4, the circuit board 12 inside the lamp tube is disconnected, and the surface of the lamp tube will not be electrified, providing a safety guarantee for the installation operation.

[0032] The protruding portion of the conductive top block 1 extends outward from both sides from its end, with protrusions that can mate with the shape of the top block mounting hole 13 in the housing 7. This restricts the rotation or movement of the conductive top block 1 except for movement along the axial direction of the top block mounting hole 13. The protrusions cooperate with the inner wall of the top block mounting hole 13, serving as a motion guide. The inner portion of the conductive top block 1 is fixedly connected to the top plate 2, and the linear movement of the top plate 2 driven by the conductive top block 1 physically controls the circuit connection status between the circuit board 12 and the external live and neutral wires.

[0033] The top plate 2 is located inside the outer casing 7 and mates with the inner end of the conductive top block 1. The top plate 2 is made of conductive material and serves as the main support and connection part for the internal electrical connection path of the lamp holder. The top plate 2 is fixedly connected to the conductive top block 1 via a connector 3. The connector 3 is made of insulating material and its function is to fix the top plate 2 to the conductive top block 1 and ensure that the top plate 2 and the conductive top block 1 can move synchronously. Two parallel connecting copper plates 6 are mounted at both ends of the top plate 2. The connecting copper plates 6 are conductive components with gradually narrowing ends, forming a guiding structure for easy insertion. This also prevents the connecting copper plates 6 from contacting the pins 4 prematurely, thus avoiding premature connection of the internal circuitry of the lamp tube, if the conductive top block 1 is not fully pressed into the top block mounting hole 13.

[0034] A connector base 5 is fixedly mounted on the circuit board 12. The connector base 5 is made of insulating material, and pins 4 are fixedly mounted at both ends of the connector base 5, connecting and securing the pins 4 to the circuit board 12. The pins 4 are conductive components, connected to the circuit board 12, and serve as contacts for the circuit board 12 to connect to the external live and neutral wires. The pins 4 are located on the outer side of the two connecting copper plates 6. Furthermore, the distance between the inner surfaces of the two pins 4 is set to be slightly smaller than the distance between the outer surfaces of the two connecting copper plates 6. This ensures that after the lamp is fully installed, the conductive top block 1 is fully pressed into the top block mounting hole 13. The connecting copper plates 6 can make firm contact with the pins 4, forming a stable circuit.

[0035] The connector base 5 provides structural support and fixation for the pins 4. Therefore, the connector base 5 needs to be made of insulating material, such as rubber or plastic, to ensure that the circuit board 12 will only be conductive when there is a connection between the two pins 4. It also provides a structure for insertion with the connecting copper plate 6, while ensuring electrical insulation between the pins 4 and other components on the circuit board.

[0036] During the initial stage of lamp installation or before the lamp is fully installed, the conductive top block 1 remains protruding outward because no external pressure is applied to it. At this time, the internal circuit of the lamp holder is disconnected. Therefore, even if the external power supply to the lamp is connected, the lamp's circuit remains disconnected. During installation, all accessible parts of the lamp that the installer can reach are in a safe, non-energized state. This provides necessary safety for installers when inserting the lamp and reduces the risk of electric leakage.

[0037] Once the lamp tube is correctly and fully installed, the lamp tube mounting base presses the conductive top block 1 into the top block mounting hole 13, pushing the conductive top block 1 to move inward into the lamp holder. As the conductive top block 1 moves, the top plate 2 is displaced by the conductive top block 1, causing the connecting copper piece 6 to move inward, ultimately enabling the connecting copper piece 6 to reliably contact the pin 4 on the plug-in base 5.

[0038] At this point, a stable circuit connection is formed between pin 4 and connecting copper plate 6, and circuit board 12 is conductive. The lamp tube's circuit is connected, providing the necessary electrical path for the lamp tube's normal operation. Keeping the push block 1 pressed in maintains the connection between connecting copper plate 6 and pin 4.

[0039] During lamp removal, as the lamp is removed from the lamp holder, the further the lamp holder is from the lamp head, the longer the portion of the conductive top block 1 that was pressed in increases as the pressure of the spring 11 is released, thus resetting. This resetting motion of the conductive top block 1 directly pulls the connecting copper piece 6 away from the two pins 4, breaking the circuit between the connecting copper piece 6 and the pins 4, putting the circuit board 12 in an open-circuit state, and disconnecting the lamp circuit again. Even during lamp removal, the external power supply to the lamp remains connected. Because the circuit is physically disconnected, the metal contacts of the lamp will not be energized, ensuring safety during lamp removal.

[0040] Example 2:

[0041] This embodiment has a similar lamp holder structure to that of Embodiment 1, and is further described based on Embodiment 1.

[0042] Electrical safety of lighting fixtures, especially during the installation and replacement of lamps, is a key aspect that needs to be considered in product design. Traditional lamp installation methods may pose a risk of electric shock during operation, especially if the power supply is not completely disconnected or if the operation is not performed correctly. To improve the safety of lamp installation, this embodiment proposes a leakage-proof spring lamp holder structure, designed to minimize the possibility of electric shock to operators during lamp installation and removal. This design focuses on achieving power-off protection during installation through the internal physical structure of the lamp.

[0043] This utility model discloses a leakage-proof spring lamp holder, including a housing 7 and pins 8. The housing 7 covers one end of a circuit board 12, and the pins 8 are fixedly installed with the housing 7 and the circuit board 12. A top block mounting hole 13 is provided in the middle of the housing 7, and a conductive top block 1 is movably installed on the top block mounting hole 13. One end of the conductive top block 1 is located on the outside of the housing 7, and the other end is located on the inside of the housing 7.

[0044] The leakage protection design of this anti-leakage spring lamp holder lies in its safe conduction mechanism, which ensures that the circuit remains safely disconnected during specific stages of lamp installation. The leakage protection design of the lamp holder mainly includes components such as the housing 7, pins 8, conducting top block 1, top plate 2, connector 3, pins 4, plug base 5, connecting copper sheet 6, spring 11, and pin housing 9.

[0045] The outer casing 7, as the peripheral structural component of the lamp holder, is made of insulating material. Its main functions are to provide structural support, protect the internal circuit board 12, and form the outermost layer of insulation protection for the lamp holder. The outer casing 7 covers one end of the circuit board 12, forming the internal structural space of the lamp holder. A top block mounting hole 13 is recessed on the outer casing 7 for mounting the conductive top block 1 and guiding the movement of the conductive top block 1.

[0046] Pin 8 is the interface connecting the circuit board 12 in the lamp tube to the external circuit system. It is inserted into the housing 7 and connected to the circuit board 12 via electrical circuitry. To improve safety, the portion of pin 8 extending out of the housing 7 is covered by a pin housing 9. Pin housing 9 is also made of insulating material and is longer than the exposed metal portion of pin 8, thus forming an additional insulating layer on the outside of the lamp holder, reducing the risk of accidental contact with live pins. Simultaneously, to ensure proper connection between pin 8 and the live and neutral wires, pin housing 9 is a hollow sleeve design, allowing the terminal of the lamp holder to extend through the opening in pin housing 9 and contact pin 8, thus establishing conductivity. The pin housing 9 is fixedly connected to the housing 7, preventing the exposure of the lamp tube and internal conductors in the lamp holder, further reducing the risk of leakage.

[0047] The conductive top block 1 is a crucial component of this invention for controlling the continuity of the internal circuitry of the lamp tube during installation. The conductive top block 1 is made of insulating material and has a hollow concentric cylindrical structure on its inner side. The interlayer between the concentric cylinders is a spring slot 10. A spring 11 is placed in the spring slot 10, with one end of the spring 11 contacting the inner wall of the end of the conductive top block 1, and the other end abutting against the bottom inner wall of the top block mounting hole 13.

[0048] When the lamp tube is not installed or is just beginning to be installed, the conductive top block 1 remains in an outward-extending state. Even if brief, accidental pressure is applied to the conductive top block 1, it will pop out after being temporarily pressed into the housing 7 and remain in the extended state. In this state, the circuit connection between the conductive top block 1 and the circuit board 12 is broken, and the lamp tube circuit is in an open state. Even if the external power supply of the lamp is connected, because there is no direct contact between the connecting copper plate 6 and the pin 4, the circuit board 12 inside the lamp tube is disconnected, and the surface of the lamp tube will not be electrified, providing a safety guarantee for the installation operation.

[0049] The protruding portion of the conductive top block 1 extends outward from both sides from its end, with protrusions that can mate with the shape of the top block mounting hole 13 in the housing 7. This restricts the rotation or movement of the conductive top block 1 except for movement along the axial direction of the top block mounting hole 13. The protrusions cooperate with the inner wall of the top block mounting hole 13, serving as a motion guide. The inner portion of the conductive top block 1 is fixedly connected to the top plate 2, and the linear movement of the top plate 2 driven by the conductive top block 1 physically controls the circuit connection status between the circuit board 12 and the external live and neutral wires.

[0050] The top plate 2 is located inside the outer casing 7 and mates with the inner end of the conductive top block 1. The top plate 2 is made of conductive material and serves as the main support and connection part for the internal electrical connection path of the lamp holder. The top plate 2 is fixedly connected to the conductive top block 1 via a connector 3. The connector 3 is made of insulating material and its function is to fix the top plate 2 to the conductive top block 1 and ensure that the top plate 2 and the conductive top block 1 can move synchronously. Two parallel connecting copper plates 6 are mounted at both ends of the top plate 2. The connecting copper plates 6 are conductive components with gradually narrowing ends, forming a guiding structure for easy insertion. This also prevents the connecting copper plates 6 from contacting the pins 4 prematurely, thus avoiding premature connection of the internal circuitry of the lamp tube, if the conductive top block 1 is not fully pressed into the top block mounting hole 13.

[0051] A connector base 5 is fixedly mounted on the circuit board 12. The connector base 5 is made of insulating material, and pins 4 are fixedly mounted at both ends of the connector base 5, connecting and securing the pins 4 to the circuit board 12. The pins 4 are conductive components, connected to the circuit board 12, and serve as contacts for the circuit board 12 to connect to the external live and neutral wires. The pins 4 are located on the outer side of the two connecting copper plates 6. Furthermore, the distance between the inner surfaces of the two pins 4 is set to be slightly smaller than the distance between the outer surfaces of the two connecting copper plates 6. This ensures that after the lamp is fully installed, the conductive top block 1 is fully pressed into the top block mounting hole 13. The connecting copper plates 6 can make firm contact with the pins 4, forming a stable circuit.

[0052] The connector base 5 provides structural support and fixation for the pins 4. Therefore, the connector base 5 needs to be made of insulating material, such as rubber or plastic, to ensure that the circuit board 12 will only be conductive when there is a connection between the two pins 4. It also provides a structure for insertion with the connecting copper plate 6, while ensuring electrical insulation between the pins 4 and other components on the circuit board.

[0053] During the initial stage of lamp installation or before the lamp is fully installed, the conductive top block 1 remains protruding outward because no external pressure is applied to it. At this time, the internal circuit of the lamp holder is disconnected. Therefore, even if the external power supply to the lamp is connected, the lamp's circuit remains disconnected. During installation, all accessible parts of the lamp that the installer can reach are in a safe, non-energized state. This provides necessary safety for installers when inserting the lamp and reduces the risk of electric leakage.

[0054] Once the lamp tube is correctly and fully installed, the lamp tube mounting base presses the conductive top block 1 into the top block mounting hole 13, pushing the conductive top block 1 to move inward into the lamp holder. As the conductive top block 1 moves, the top plate 2 is displaced by the conductive top block 1, causing the connecting copper piece 6 to move inward, ultimately enabling the connecting copper piece 6 to reliably contact the pin 4 on the plug-in base 5.

[0055] At this point, a stable circuit connection is formed between pin 4 and connecting copper plate 6, and circuit board 12 is conductive. The lamp tube's circuit is connected, providing the necessary electrical path for the lamp tube's normal operation. Keeping the push block 1 pressed in maintains the connection between connecting copper plate 6 and pin 4.

[0056] During lamp removal, as the lamp is removed from the lamp holder, the further the lamp holder is from the lamp head, the longer the portion of the conductive top block 1 that was pressed in increases as the pressure of the spring 11 is released, thus resetting. This resetting motion of the conductive top block 1 directly pulls the connecting copper piece 6 away from the two pins 4, breaking the circuit between the connecting copper piece 6 and the pins 4, putting the circuit board 12 in an open-circuit state, and disconnecting the lamp circuit again. Even during lamp removal, the external power supply to the lamp remains connected. Because the circuit is physically disconnected, the metal contacts of the lamp will not be energized, ensuring safety during lamp removal.

[0057] In terms of material selection, this embodiment has carefully considered the choice of component materials to meet electrical safety and functional requirements. For components requiring insulation, such as the housing 7, conductive top block 1, connector 3, plug-in base 5, and pin housing 9, engineering plastics or other insulating materials with excellent insulation properties are selected. These insulating components play a crucial role in electrical isolation and safety protection within the lamp holder structure. For components requiring conductivity, such as the top plate 2, connecting copper sheet 6, pin 4, and pin 8, metallic materials with excellent conductivity, such as copper or copper alloys, are selected to ensure efficient and low-loss current transmission within the lamp holder and to ensure the reliability of electrical connections. The spring 11 is made of an elastic metallic material, such as spring steel, to ensure that it maintains stable elasticity and mechanical properties during long-term use.

[0058] Compared with existing technologies that require external safety components, the leakage-proof spring lamp holder described in this embodiment integrates the safety interlocking mechanism inside the lamp holder. Through the coordinated action of the movable conductive top block 1 and the spring 11, the circuit is automatically switched on and off using a purely mechanical structure during the installation and removal of the lamp tube, which effectively reduces the risk of leakage and improves the reliability of the leakage-proof device.

Claims

1. An electrically leakage-proof spring lamp cap, characterized by, It includes a shell (7) and a pin (8), the shell (7) covers one end of the circuit board (12), the pin (8) is fixedly installed with the shell (7) and the circuit board (12), the middle part of the shell (7) is provided with a top block mounting hole (13), the movable installation of the top block mounting hole (13) is provided with a lead-through top block (1), one end of the lead-through top block (1) is located outside the shell (7), and the other end is located inside the shell (7).

2. An electrically safe spring lamp holder according to claim 1, wherein The middle part of the lead-through top block (1) is a hollow concentric cylindrical structure; The outer side of the lead-through top block (1) is provided with a protruding part matched with the top block mounting hole (13).

3. An electrically safe spring lamp holder according to claim 2, wherein The spring slot (10) is provided with a spring (11), one end of the spring (11) is matched with the inner wall of the lead-through top block (1), and the other end of the spring (11) is matched with the bottom of the top block mounting hole (13).

4. A spring leakproof lamp cap as claimed in claim 1 or 2 or 3, wherein, The end of the lead-through top block (1) located in the inside part of the shell (7) is matched with a top plate (2), and a connecting piece (3) is fixedly connected between the lead-through top block (1) and the top plate (2).

5. An electrically safe spring lamp holder according to claim 4, wherein The two ends of the top plate (2) are provided with connecting copper sheets (6), and the distance between the ends of the connecting copper sheets (6) gradually narrows.

6. An electrically safe spring lamp holder according to claim 5, wherein The circuit board (12) is provided with a plug-in base (5), and the two ends of the plug-in base (5) are provided with pins (4) perpendicular to the circuit board (12), the pins (4) are located outside the two connecting copper sheets (6), and the distance between the inner surfaces of the two pins (4) is slightly smaller than the distance between the outer surfaces of the two connecting copper sheets (6).

7. An electrically safe spring lamp holder according to claim 6, wherein The pins (4) are conductively connected with the circuit board (12), and the plug-in base (5) is an insulating device.

8. An electrically safe spring lamp cap as claimed in claim 1 or 2 or 3 or 5 or 6 or 7 wherein, One end of the pin (8) extends from the shell (7), the other end of the pin (8) is conductively connected with the circuit board (12), and the extending part of the pin (8) located outside the shell (7) is sleeved with a pin shell (9). The pin shell (9) is hollow and has a length greater than the extending part of the pin (8).

9. An electrically safe spring lamp holder according to claim 5 or 6 or 7, characterised in that, The top plate (2) is made of conductive material, and the connecting piece (3), the lead-through top block (1) and the shell (7) are made of insulating material.

10. An electrically safe spring lamp holder according to claim 8, wherein The pin shell (9) is fixedly installed with the shell (7), and the pin shell (9) is made of insulating material.

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