A coupler

Abstract

This application relates to the field of power equipment technology and provides a coupler including a base, an upper coupling seat, a lower coupling seat, a connector seat, a circuit board, and contact plates. The connector seat is mounted on one side of the base, and the circuit board is mounted on the base and electrically connected to the connector seat. The upper coupling seat is mounted inside the base and has a cross-connection frame with a contact groove. The circuit board has several contact plates. The lower coupling seat is externally connected to a lighting fixture and plugged into the upper coupling seat. The lower coupling seat has a contact ring inserted into the contact groove and makes contact with the several contact plates. This application provides stable electrical connections. Furthermore, a lighting fixture is also provided.

Description

Technical Field

[0001] This application relates to the field of power equipment technology, and in particular to a coupler. Background Technology

[0002] Traditional lighting fixtures use couplers to transmit electrical signals via light. Ordinary couplers typically connect to the lighting fixture's circuit board using a single-sided contact-spring contact-single-sided contact method. This method is prone to poor contact, especially in earthquake-prone areas or when the fixture shakes. The contact spring can deform, causing one-sided stress and contact misalignment, frequently resulting in the fixture failing to light up. Summary of the Invention

[0003] To address the aforementioned problems, this application provides a coupler.

[0004] The coupler provided in this application adopts the following technical solution: A coupler includes a base, an upper coupling seat, a lower coupling seat, a connector seat, a circuit board, and contact plates. The connector seat is mounted on one side of the base, and the circuit board is mounted on the base and electrically connected to the connector seat. The upper coupling seat is installed inside the base and has a cross-connection frame with a contact groove. The circuit board has several contact plates. The lower coupling seat is externally connected to a lamp and plugged into the upper coupling seat. The lower coupling seat has a contact ring inserted into the contact groove and makes contact with several contact plates.

[0005] By adopting the above technical solution, after connecting the positive and negative wires through the connector, the circuit board receives power and transmits it to the contact plate. When the lower coupling seat and the upper coupling seat are plugged in, the insertion effect of the contact ring ensures that no matter how the lower coupling seat drives the contact ring to rotate or shift, any contact plate will contact the contact ring, thereby achieving a stable electrical connection effect and avoiding leakage or power failure.

[0006] Optionally, the lower coupling seat has a power-connecting ring divided into an outer power-connecting ring and an inner power-connecting ring, both of which are connected to power-connecting plates.

[0007] By adopting the above technical solution and designing it into two sets of ring structures, namely the outer ring and the inner ring, the contact area and different contact positions can be increased, so that the transmission of electricity will not be affected even if either the inner ring or the outer ring is damaged or has a contact failure.

[0008] Optionally, the electrical contact plates are distributed as follows: at least two sets are allocated to the outer electrical contact ring, and at least two sets are allocated to the inner electrical contact ring.

[0009] By adopting the above technical solution, multiple sets of contact plates are used to connect the inner and outer contact rings, ensuring that if any contact plate becomes loose or loses contact, the other contact plates will not be affected and power transmission can still be achieved.

[0010] Optionally, the contact piece is divided into a triangular contact segment, a bent contact segment, and a connecting segment; the connecting segment is located at one end of the triangular contact segment, and a connection port for inserting the connecting segment is provided on the circuit board; the triangular contact segment extends towards the groove of the contact slot and reaches the intersection point, where it becomes a bent contact segment; the bent contact segment bends to both sides at the intersection point of the triangular contact segments.

[0011] By adopting the above technical solution, when the contact ring is inserted into the contact groove, the top of the contact ring moves to the intersection of the triangular contact segments and pushes open the triangular contact segments and the curved contact segments. After the triangular contact segments are pushed open, the toughness of its metal material causes the intersection of the triangular contact segments to clamp onto the contact ring, thereby allowing the power on the circuit board to be stably transmitted to the contact ring through the connection segment.

[0012] Optionally, the upper coupling seat has an annular socket, and the extension length of the bent contact segment after bending is greater than that of the annular socket.

[0013] By adopting the above technical solution, one end of the electrical connector is inserted into the circuit board through the connecting section, and the other end is locked in the annular socket through the extension length of the bent contact section, thereby ensuring that the overall installation position of the electrical connector will not be shifted or misaligned.

[0014] Optionally, when the contact ring is inserted into the contact groove, the two sides of the contact ring abut against the intersection of the triangular contact segment; the top of the contact ring abuts against the inner top surface of the triangular contact segment, forming a three-point contact.

[0015] By adopting the above technical solution, the contact area can be increased through three contact points at different locations. Even if any contact point becomes loose, power can still be supplied through other contact points. In conjunction with multiple contact plates set in different locations, stable power supply can be ensured.

[0016] Optionally, the upper coupling seat is provided with at least two sets of threaded cylinders, and the base is provided with an installation port at the corresponding threaded cylinder; a limit port is provided on the circuit board, and the threaded cylinder extends into the base through the limit port; an installation bolt is provided in the installation port, and the installation bolt passes through the installation port and is screwed into the threaded cylinder.

[0017] By adopting the above technical solution, the connection between the upper coupling seat and the base is ensured through the screwing effect of at least two sets of threaded cylinders and mounting bolts. At the same time, the installation position of the circuit board is restricted by the limiting port, thereby avoiding misalignment of the circuit board and improving the accuracy of circuit transmission.

[0018] Optionally, the cross-connection frame is formed by two sets of recessed frames intersecting at the center point, and two sets of connection slots are provided, corresponding to the outer connection ring and the inner connection ring respectively; a spacer ring is also provided in the middle of the cross-connection frame to provide a gap between the outer connection ring and the inner connection ring.

[0019] By adopting the above technical solution, the cross-connection frame formed by the intersection of the center point makes the overall internal skeleton distribution clear, and sets the positions of each connection piece at intervals to separate multiple interval spaces. No connection piece will come into contact with each other, and when the connection ring is offset, the connection pieces at different positions will not be affected.

[0020] Optionally, the inner walls of the cross-connection frame and the spacer ring are also provided with an elastic structure, which is located at the intersection of the triangular contact segments and provides a clamping elastic force.

[0021] By adopting the above technical solution, the elastic force generated by the elastic structure is used to apply elastic force to both sides of the triangular contact segment, so that the triangular contact segment can make more stable contact with the contact ring and avoid loosening.

[0022] A type of lamp with an internal coupler.

[0023] By adopting the above technical solution, a power connection is provided through a coupler to ensure stable lighting provided by the lamps.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. After connecting the positive and negative wires through the connector, the circuit board receives power and transmits it to the contact plate. When the lower and upper coupling plates are plugged in, the insertion effect of the contact ring ensures that no matter how the lower coupling plate rotates or shifts the contact ring, any contact plate will contact the contact ring, thereby achieving a stable electrical connection and avoiding leakage or power failure. 2. By designing it into two sets of ring structures, an outer ring and an inner ring, the contact area and different contact positions can be increased, so that the transmission of power is not affected even if either the inner or outer ring is damaged or has a contact failure. 3. Multiple sets of contact plates are used to connect the inner and outer contact rings to ensure that if any contact plate becomes loose or loses contact, the other contact plates will not be affected and power transmission can still be achieved. 4. When the contact ring is inserted into the contact slot, the top of the contact ring moves to the intersection of the triangular contact segments and pushes open the triangular contact segments and the bent contact segments. After the triangular contact segments are pushed open, the toughness of the metal material causes the intersection of the triangular contact segments to clamp onto the contact ring, thereby allowing the power on the circuit board to be stably transmitted to the contact ring through the connection segment. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the coupler in some embodiments of this application; Figure 2 This is an exploded view of the coupler in some embodiments of this application; Figure 3 This is a three-dimensional structural schematic diagram of the contact plate in some embodiments of this application; Figure 4 This is a bottom view of the upper coupling seat in some embodiments of this application; Figure 5 This is a top view of the upper coupling seat in some embodiments of this application; Figure 6 This is a schematic diagram of the first cross-sectional structure of the upper coupling seat portion in some embodiments of this application; Figure 7 This is a schematic diagram of a second cross-sectional structure of the upper coupling seat portion in some embodiments of this application; Figure 8 This is an exploded structural diagram of the lamp in some embodiments of this application; The markings in the attached diagram are as follows: 1. Base; 11. Mounting port; 12. Mounting bolt; 2. Upper coupling seat; 21. Cross-connection frame; 211. Connecting groove; 22. Annular socket; 23. Threaded cylinder; 24. Spacer ring; 25. Elastic structure; 251. Telescopic cylinder; 252. Telescopic rod; 253. Elastic part; 254. Compression ball; 3. Lower coupling seat; 31. Connecting ring; 311. Outer connecting ring; 312. Inner connecting ring; 3121. Annular protrusion; 4. Connector seat; 5. Circuit board; 51. Connection port; 52. Limiting port; 6. Connecting piece; 61. Triangular contact segment; 611. Entrance; 62. Bending contact segment; 63. Connecting segment; 7. Lamp holder; 8. Lamp cover. Detailed Implementation

[0026] The following specific examples illustrate the implementation methods of this application. Those skilled in the art can easily understand other advantages and effects of this application from the information disclosed herein. This application can also be implemented or applied through other different specific embodiments, and various details in this application can be modified or changed according to different viewpoints and application systems without departing from the spirit of this application. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0027] The embodiments of this application will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily implement the application. This application may be embodied in many different forms and is not limited to the embodiments described herein.

[0028] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics represented in connection with that embodiment or example, which are included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics represented may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate different embodiments or examples represented in this application, as well as features of different embodiments or examples.

[0029] Furthermore, the terms "first" and "second" are used only to indicate an objective and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the representation of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0030] Throughout this specification, when it is said that a device is "connected" to another device, this includes not only "direct connection" but also "indirect connection" by placing other components in between. Furthermore, when it is said that a device "comprises" a certain constituent element, unless otherwise stated otherwise, this does not exclude other constituent elements, but rather implies that other constituent elements may be included.

[0031] The following is in conjunction with the appendix Figure 1 - Appendix Figure 8 This application will be described in further detail below.

[0032] This application discloses a coupler.

[0033] A coupler, reference Figure 1 As shown, it includes a base 1, an upper coupling seat 2, a lower coupling seat 3, a connector seat 4, and a circuit board 5. The base 1 is used to connect to the lamp holder 7, and the connection method can be bolt fastening. The connector seat 4 is installed on one side of the base 1 and provides positive and negative wires for the lamp holder 7 to be inserted and installed. The circuit board 5 is installed on the base 1 and is electrically connected to the connector seat 4. The electrical connection is a wire connection. The positive and negative wires connected to the connector seat 4 are connected to the circuit board 5 to provide power supply.

[0034] The upper coupling seat 2 is installed inside the base 1, and a cross-connection frame 21 is provided on the upper coupling seat 2. A connection groove 211 is provided on the cross-connection frame 21. The cross-connection frame 21 is the internal skeleton of the upper coupling seat 2, which is distributed in a cross shape. Four support legs are provided at the bottom to ensure the fixing effect.

[0035] The circuit board 5 is provided with several electrical contact pieces 6. The electrical contact pieces 6 are metal pieces used to provide power transmission. The electrical contact pieces 6 are located on the circuit board 5, so the power connected to the connector 4 can be transmitted to the electrical contact pieces 6.

[0036] The lower coupling seat 3 is externally connected to the lamp and plugged into the upper coupling seat 2. The lower coupling seat 3 is connected to the lighting structure in the lamp, so that power can be transmitted to the lighting structure through the lower coupling seat 3 to provide lighting effect.

[0037] The lower coupling seat 3 is equipped with a contact ring 31. The contact ring 31 has a ring-shaped structure and is made of metal. When the contact ring 31 is inserted into the contact groove 211, it can contact and connect with several contact pieces 6. By utilizing the insertion effect of the contact ring 31, no matter how the lower coupling seat 3 drives the contact ring 31 to rotate or shift, any contact piece 6 will contact the contact ring 31, thereby achieving a stable electrical connection effect and avoiding leakage or power failure.

[0038] Further reference Figure 2 As shown, the lower coupling seat 3's contact ring 31 is divided into an outer contact ring 311 and an inner contact ring 312. Both the outer contact ring 311 and the inner contact ring 312 are connected to contact plates 6. By designing the two sets of ring structures, the contact area and different contact positions can be increased. Since both the outer contact ring 311 and the inner contact ring 312 are connected by contact plates 6, the power transmission will not be affected if either the inner contact ring 312 or the outer contact ring 311 is damaged or has a contact failure. If the inner contact ring 312 and the corresponding contact plate 6 become loose and cannot transmit power, the outer contact ring 311 can continue to transmit power to ensure the stability of the connection.

[0039] Furthermore, refer to Figure 2 As shown, the contact plates 6 are distributed as follows: at least two sets are allocated to the outer contact ring 311 and at least two sets are allocated to the inner contact ring 312. The multiple sets of contact plates 6 provide connection between the inner contact ring 312 and the outer contact ring 311, so as to ensure that when any contact plate 6 becomes loose or loses contact, the other contact plates 6 will not be affected and power transmission can still be achieved, thereby further improving the stability of the connection.

[0040] In some embodiments, reference Figure 2 and Figure 3 As shown, the overall structure of the contact piece 6 is divided into a triangular contact segment 61, a curved contact segment 62, and a connecting segment 63, which provide different connection effects through three different structures.

[0041] The connecting segment 63 is located at one end of the triangular contact segment 61. The circuit board 5 has a connection port 51 for the connecting segment 63 to be inserted. The connecting segment 63 is used to connect with the circuit board 5 and is arranged in a vertical direction. It is inserted into the connection port 51 of the circuit board 5 to provide a power connection.

[0042] The triangular contact segment 61 extends towards the groove opening of the electrical groove 211 and reaches the intersection point, where it becomes the curved contact segment 62. That is, the intersection point of the extension of the triangular contact segment 61 is the connection point of the triangular contact segment 61 and the curved contact segment 62, through which contact and energization with the electrical contact piece 6 are provided.

[0043] The curved contact segment 62 is located at the intersection of the triangular contact segment 61 and bends to both sides. The curved contact segment 62 unfolds to both sides to fix the position of the overall contact piece 6 and prevent it from falling off.

[0044] Specifically, when the contact ring 31 is inserted into the contact groove 211, the top of the contact ring 31 moves to the intersection of the triangular contact segment 61 and pushes open the triangular contact segment 61 and the bent contact segment 62. After the triangular contact segment 61 is pushed open, the toughness of its metal material causes the intersection of the triangular contact segment 61 to clamp onto the contact ring 31, thereby allowing the power on the circuit board 5 to be stably transmitted to the contact ring 31 through the connecting segment 63.

[0045] Among them, reference Figure 4 As shown, the upper coupling seat 2 has an annular socket 22. The extension length of the bent contact segment 62 after bending is greater than that of the annular socket 22. By utilizing the fact that the extension length of the bent contact segment 62 is longer than the diameter of the annular socket 22, the interface prevents the bent contact segment 62 from detaching from the annular socket 22. One end of the electrical contact piece 6 is connected to the circuit board 5 through the connecting segment 63, and the other end is locked at the annular socket 22 by the extension length of the bent contact segment 62, thereby ensuring that the overall installation position of the electrical contact piece 6 will not be shifted or misaligned.

[0046] When the contact ring 31 is inserted into the contact groove 211, the two sides of the contact ring 31 abut against the triangular contact segment 61, forming a two-point contact, so that no matter which side the contact ring or contact piece 6 is offset to, the other side will provide contact to transmit power.

[0047] The top of the contact ring 31 abuts against the inner top surface of the triangular contact segment 61 to form a third point of contact. Through three contact points at different positions, not only can the contact area be increased, but even if any contact point becomes loose, power can still be supplied through other contact points. In conjunction with multiple contact pieces 6 set in different positions, stable power supply can be ensured.

[0048] Further reference Figure 2 As shown, the upper coupling seat 2 is provided with at least two sets of threaded cylinders 23, and the base 1 is provided with an installation port 11 corresponding to the threaded cylinder 23. The circuit board 5 is provided with a limiting port 52. When the upper coupling seat 2 is connected to the base 1, the threaded cylinder 23 is aligned with the limiting port 52 and the installation port 11, so that it extends towards the base 1 after passing through the limiting port 52 and fits against the installation port 11.

[0049] Mounting bolts 12 are provided inside the mounting port 11. The mounting bolts 12 pass through the mounting port 11 and are screwed to the threaded cylinder 23, thereby stably connecting the base 1 and the upper coupling seat 2. The number of mounting ports 11, threaded cylinders 23 and mounting bolts 12 are the same, with more than two sets, to ensure the stability of the connection between the upper coupling seat 2 and the base 1. At the same time, the limiting port 52 is used to limit the installation position of the circuit board 5, thereby avoiding misalignment of the circuit board 5 and improving the accuracy of circuit transmission.

[0050] Furthermore, refer to Figure 5 As shown, the cross-connection frame 21 is formed by two sets of concave frames intersecting at the center point, and the connection groove 211 has two sets, corresponding to the outer connection ring 311 and the inner connection ring 312 respectively. The cross-connection frame 21 also has a spacer ring 24 in the middle to provide a gap between the outer connection ring 311 and the inner connection ring 312, so that the inner connection ring 312 and the outer connection ring 311 do not interfere with each other or contact each other. The cross-connection frame 21 formed by intersecting at the center point makes the overall internal skeleton distribution clear, and the positions of each connection piece 6 are set at intervals to separate multiple interval spaces. No connection piece 6 will contact each other, and when the connection ring 31 is offset, the connection pieces 6 at different positions will not be completely affected.

[0051] Further, refer to Figure 6 As shown, the inner walls of the cross-connection frame 21 and the spacer ring 24 are also provided with an elastic structure 25. The elastic structure 25 is located at the intersection of the triangular contact segment 61 and provides a pressing force. The elastic force generated by the elastic structure 25 is used to apply elastic force to both sides of the triangular contact segment 61, so that the triangular contact segment 61 can contact the connection ring 31 more firmly and avoid loosening.

[0052] The elastic structure 25 may include a telescopic cylinder 251, a telescopic rod 252, and a clamping ball 254. The telescopic cylinder 251 is installed on the inner wall of the cross-connector 21 or the spacer ring 24. The telescopic rod 252 is inserted into the telescopic cylinder 251. The elastic part 253 is located inside the telescopic cylinder 251 and one end is connected to the inner wall of the telescopic cylinder 251, and the other end is connected to the telescopic rod 252, providing elastic force for the telescopic rod 252 to extend out of the telescopic cylinder 251. The clamping ball 254 is installed on the telescopic rod 252 at the end of the telescopic rod 252 away from the telescopic cylinder 251 and abuts against the triangular contact segment 61.

[0053] The compression ball 254 can rotate along the telescopic rod 252, and the two can be pivotally connected by a hinge shaft. The elastic part 253 can be a spring.

[0054] The elastic force of the elastic part 253 is used to apply pressure to the triangular contact section 61 by the telescopic rod 252 and the pressure ball 254, so that the triangular contact section 61 clamps the contact ring 31, making the connection point more stable.

[0055] Furthermore, refer to Figure 7 As shown, a locking inlet 611 is provided at the middle position between the triangular contact segment 61 and the connecting segment 63 of the contact piece 6. The elastic structure 25 is positioned opposite to the locking inlet 611, and the pressing ball 254 is inserted into the locking inlet 611, so that one end of the pressing ball 254 abuts against the groove of the locking inlet 611 and, together with the elastic part 253, provides a pressing force to the triangular contact segment 61. The other end of the pressing ball 254 is located inside the triangular contact segment 61.

[0056] The inner ring 312 is provided with two annular protrusions 3121 along the circumferential direction. When the annular protrusions 3121 are inserted into the triangular contact section 61, they contact the compression ball 254. When the inner ring 312 contacts the end of the triangular contact section 61 near the connecting section 63, the two annular protrusions 3121 are located on both sides of the compression ball 254 and abut against the compression ball 254.

[0057] By using the clamping ball 254 to restrict the annular protrusion 3121, the inner ring 312 can be prevented from shifting. When disassembly is required, only a force greater than the elastic force of the elastic part 253 needs to be applied to make the annular protrusion 3121 push the clamping ball 254 to disengage the inner ring 312.

[0058] The two annular protrusions 3121 are located on the outer and inner walls of the inner ring 312, respectively, to fit the corresponding compression balls 254 on the inner and outer walls of the inner ring 312.

[0059] The clamping ball 254 can be made of an electrically conductive metal material, and the annular protrusion 3121 can also be made of an electrically conductive metal material. When the clamping ball 254 is clamped in the inlet 611, it contacts the triangular contact segment 61 and the annular protrusion 3121 at the same time. This allows the inner ring 312 to achieve another power path through the annular protrusion 3121 and the clamping ball 254, thereby further preventing power outages.

[0060] The annular protrusion 3121 has a semi-circular chamfer, which allows the triangular contact segment 61 to be pushed away without getting stuck when passing through the connection point between the triangular contact segment 61 and the curved contact segment 62.

[0061] The diagram is for better illustration and is only a schematic diagram. In actual design, the triangular contact segments 61 are actually closely fitted and intersecting each other, and the inner ring 312 will also contact the inner top surface of the triangular contact segments 61. The diagram is for easier illustration and is not completely closed and in close contact.

[0062] This application also provides a lamp, see reference. Figure 8As shown, the internal connection includes the coupler described in the above embodiment. The lamp may include a lamp holder 7 and a lamp cover 8. The lower coupling seat 3 is connected to the lamp cover 8, and the upper coupler is connected to the lamp holder 7 through the base 1. When the lamp cover 8 is connected to the lamp holder 7, the upper coupling seat 2 and the lower coupling seat 3 are connected synchronously, so that the power connection is stable and the lighting stability of the lamp is guaranteed.

[0063] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be included within the scope of protection of this application.

Claims

1. A coupler, characterized in that, It includes a base (1), an upper coupling seat (2), a lower coupling seat (3), a connector seat (4), a circuit board (5), and electrical contacts (6); the connector seat (4) is installed on one side of the base (1), the circuit board (5) is installed on the base (1), and is electrically connected to the connector seat (4); the upper coupling seat (2) is installed inside the base (1), and a cross-connection frame (21) is provided on the upper coupling seat (2), and an electrical contact groove (211) is provided on the cross-connection frame (21); a number of electrical contacts (6) are provided on the circuit board (5); the lower coupling seat (3) is externally connected to the lamp and is plugged into the upper coupling seat (2); an electrical contact ring (31) is provided inside the lower coupling seat (3), the electrical contact ring (31) is inserted into the electrical contact groove (211), and is in contact with a number of electrical contacts (6).

2. The coupler according to claim 1, characterized in that, The lower coupling seat (3) has a power-connecting ring (31) divided into a power-connecting outer ring (311) and a power-connecting inner ring (312), and both the power-connecting outer ring (311) and the power-connecting inner ring (312) are connected to a power-connecting piece (6).

3. A coupler according to claim 2, characterized in that, The electrical contact plates (6) are distributed as follows: at least two groups are allocated to the outer electrical contact ring (311), and at least two groups are allocated to the inner electrical contact ring (312).

4. A coupler according to claim 2, characterized in that, The contact piece (6) is divided into a triangular contact segment (61), a bent contact segment (62) and a connecting segment (63); the connecting segment (63) is located at one end of the triangular contact segment (61), and the circuit board (5) has a connection port (51) for the connecting segment (63) to be inserted; the triangular contact segment (61) extends towards the groove of the contact groove (211) and reaches the intersection point, where it becomes the bent contact segment (62); the bent contact segment (62) is located at the intersection point of the triangular contact segment (61) and bends to both sides.

5. A coupler according to claim 4, characterized in that, The upper coupling seat (2) has an annular socket (22), and the extension length of the bent contact segment (62) after bending is greater than that of the annular socket (22).

6. A coupler according to claim 4, characterized in that, When the contact ring (31) is inserted into the contact groove (211), the two sides of the contact ring (31) abut against the triangular contact segment (61); the top of the contact ring (31) abuts against the inner top surface of the triangular contact segment (61), forming a three-point contact.

7. A coupler according to claim 4, characterized in that, The upper coupling seat (2) is provided with at least two sets of threaded cylinders (23), and the base (1) is provided with an installation port (11) corresponding to the threaded cylinder (23); the circuit board (5) is provided with a limiting port (52), and the threaded cylinder (23) extends into the base (1) through the limiting port (52); the installation port (11) is provided with an installation bolt (12), and the installation bolt (12) passes through the installation port (11) and is screwed into the threaded cylinder (23).

8. A coupler according to claim 4, characterized in that, The cross-connection frame (21) is formed by two sets of concave frames intersecting at the center point, and the connection groove (211) is provided in two sets, corresponding to the outer connection ring (311) and the inner connection ring (312) respectively; the cross-connection frame (21) is also provided with a spacer ring (24) in the middle to provide a gap between the outer connection ring (311) and the inner connection ring (312).

9. A coupler according to claim 8, characterized in that, The inner walls of the cross-connection frame (21) and the spacer ring (24) are also provided with an elastic structure (25), which is located at the intersection of the triangular contact segments (61) and provides a clamping elastic force.

10. A lamp, characterized in that, The internal connection has a coupler as described in any one of claims 1-9.

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