Conductive track, track lamp and track lamp system
By setting up a protruding stop on the conductive track of the track lamp to form a connection cavity, the mechanical and electrical connection of the lamp is achieved, which solves the problems of unstable power extraction of existing track lamps and excessively wide track design, and achieves a narrower and more reliable track design and adaptation to a variety of installation scenarios.
Patent Information
- Application Number
- CN202422220487.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-10
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-09-10
AI Technical Summary
The existing track lights have installation stresses to obtain power, and poor contact, and the track design is too wide, resulting in poor visual perception, and the splicing scene is single and cumbersome, which cannot adapt to the needs of multiple installation scenarios.
A conductive track is designed, and a connecting cavity is formed by setting a protruding stop on both side arms, allowing the lamp to achieve mechanical and electrical connection in the same cavity, simplifying the track structure, reducing the track width, improving visual perception, and adapting to multiple installation scenarios through the chute and the connection device.
It realizes mechanical and electrical connection of the lamp in the same connecting cavity, which is convenient to operate and reliable to connect, simplifies the track structure, the overall track is narrower, has a better visual feeling, and meets the needs of multiple installation scenarios.
Smart Images
Figure CN223020171U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a conductive track, a track light and a track light system, belonging to the technical field of lighting fixtures. Background Art
[0002] For most track lights on the market, the power supply taking method is to take power from the side of the track. However, due to the installation stress on the side of the track, the contact between the lamp and the power supply taking position is poor, and the power supply taking is unstable after the lamp is installed, and the lamp is prone to flashing.
[0003] There are also track lights that take power from the bottom of the track. However, the mechanical connection and electrical connection between the track and the lamp are arranged in different cavities of the track, so that the track needs to be designed with an extra-wide width, and the part adapting to the lamp is also extra-wide, resulting in a poor visual sense on the front side after the track is installed. In addition, the splicing scenarios of the existing track lights are single and cumbersome, and cannot meet the requirements of various different installation scenarios.
[0004] In view of this, it is necessary to improve the existing conductive track, track light and track light system. Summary of the Utility Model
[0005] The purpose of the utility model is to provide a conductive track which can realize the mechanical connection and electrical connection of the lamp in the same cavity, and the connection is reliable, and the whole track is narrower and has a good visual sense.
[0006] To achieve the above purpose, the utility model provides a conductive track, which includes:
[0007] A track body, including two opposite side arms and a connecting arm connecting the two side arms. The connecting arm and the two side arms form a receiving space for installing a lamp, and a limiting groove is arranged on the side of the connecting arm facing the lamp;
[0008] An electrode strip, laid on the connecting arm and received in the limiting groove;
[0009] Wherein, raised stop parts are arranged on both side arms, and a connecting cavity is formed between the stop parts and the limiting groove. The connecting cavity is configured to allow the lamp to be inserted to be mechanically connected with the stop parts and electrically connected with the electrode strip at the same time.
[0010] As a further improvement of the utility model, at least two electrode strips with opposite polarities are included. The conductive track further includes an electrical connector electrically connected to the two electrode strips. The electrical connector includes an electrical connection part at least partially extending out of the track body and connected to the mains power supply, and the electrical connection part is electrically connected to the electrode strip.
[0011] As a further improvement of the utility model, the number of the limiting grooves matches that of the electrode strips, and all the limiting grooves are arranged side by side.
[0012] As a further improvement of the present utility model, a protruding flank is provided on the outer wall surface of the side arm, and a mounting hole for inserting a fixing member is provided on the flank.
[0013] As a further improvement of the present utility model, a chute is provided on the side of the connecting arm facing away from the limiting groove.
[0014] Another object of the present utility model is to provide a track light with the above-mentioned conductive track.
[0015] To achieve the above object, the present utility model provides a track light, comprising:
[0016] The above-mentioned conductive track;
[0017] A lamp, mounted on the track body;
[0018] Wherein, the lamp is provided with a conductive part in electrical contact with the electrode strip and a clamping part cooperating with the stopping part, and in the longitudinal direction of the track body, the conductive part and the clamping part are located on the same straight line.
[0019] As a further improvement of the present utility model, two conductive parts are provided and are arranged to elastically protrude towards the electrode strip, and at least two clamping parts are provided and are arranged to be elastically deformed under the action of an external force.
[0020] Another object of the present utility model is to provide a track system with the above-mentioned track light.
[0021] To achieve the above object, the present utility model provides a track light system, comprising:
[0022] At least two of the above-mentioned track lights;
[0023] A connecting device, located between two adjacent track lights to connect the track bodies of two adjacent track lights;
[0024] Wherein, a chute is provided on each track body, and the connecting device is partially received in the chute to connect two adjacent track bodies.
[0025] As a further improvement of the present utility model, the connecting device includes a connecting piece and a steering connecting piece. The steering connecting piece is provided with a clamping groove communicating with the chute, and one end of the connecting piece is fixed in the chute and the other end is fixed in the clamping groove.
[0026] As a further improvement of the present utility model, the two ends of the connecting device are provided with plug-in parts and elastic pieces located on both sides of the plug-in parts. The plug-in parts are configured to be inserted into the chute for mechanical connection with the track body, and the elastic pieces are configured to be inserted into the limiting groove for electrical connection with the electrode strip.
[0027] The beneficial effects of the present utility model are as follows: By providing raised stop portions on both side arms of the conductive track of the present utility model, a connection cavity can be formed between the stop portions and the limiting grooves, thereby allowing the lamp to be inserted into the connection cavity to be mechanically connected to the stop portions while being electrically connected to the electrode strips. Compared with the prior art, the conductive track of the present utility model enables the lamp to achieve mechanical connection and electrical connection in the same connection cavity, with convenient operation, reliable connection, and simplified track structure. The overall track is also narrower, presenting a better visual perception. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Figure 1 is a perspective structural view of the track system of the present utility model.
[0029] Figure 2 is Figure 1 a side view of the track lamp in
[0030] Figure 3 is Figure 2 a perspective structural view of the conductive track in
[0031] Figure 4 is Figure 3 a perspective structural view of the track body in
[0032] Figure 5 is Figure 4 a side view of
[0033] Figure 6 is Figure 3 a perspective structural view of the electrode strip in
[0034] Figure 7 is Figure 2 a perspective structural view of the lamp in
[0035] Figure 8 is Figure 1 a perspective structural view of the internal electrical connector of the track system in
[0036] Figure 9 is Figure 1 a perspective structural view of the connection device in
[0037] Figure 10 is Figure 2 a schematic diagram of another embodiment of the track lamp in
[0038] Figure 11 is Figure 10 a perspective structural view of the conductive track in
[0039] Figure 12 is Figure 11 a side view of the track body in
[0040] Figure 13Yes Figure 9 Another schematic diagram of an L-shaped embodiment of the connecting device in Figure 9 .
[0041] Figure 14 Yes Figure 13 Schematic diagram of a linear three-dimensional structure of the connecting device in Figure 13 .
[0042] Reference numerals:
[0043] 100 - Track light system; 200 - Track light; 300 - Connecting device; 300’ - Connecting device; 400 - Conductive track; 500 - Light fixture; 600 - Fastener;
[0044] 1 - Track body; 10 - Receiving space; 11 - Side arm; 110 - Connecting cavity; 1101 - First connecting cavity; 1102 - Second connecting cavity; 111 - Stopping portion; 12 - Connecting arm; 121 - Limiting groove; 1211 - First groove; 1212 - Second groove; 122 - Reinforcing portion; 13 - Flank; 131 - Mounting hole; 14 - Chute; 14’ - Chute;
[0045] 2 - Electrode strip; 21 - Substrate; 211 - Mounting portion; 22 - Conductive sheet;
[0046] 3 - Electrical connector; 31 - Electrical connection portion;
[0047] 4 - Conductive portion; 5 - Clamping portion; 6 - Connecting piece; 7 - Steering connecting piece; Card slot 71; Screw 8; 6’ - Connecting portion; 7’ - Insertion piece; 8’ - Clamping platform; 9’ - Elastic piece. Detailed implementation manners
[0048] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.
[0049] Please refer to Figure 1 - Figure 2 As shown, the present utility model discloses a track light system 100, which includes at least two track lights 200 and a connecting device 300 located between two adjacent track lights 200. The connecting device 300 is used to connect two adjacent track lights 200. The track light 200 includes a conductive track 400 and a light fixture 500 mounted on the conductive track 400, and the light fixture 500 can slide on the conductive track 400 to change the lighting position. The conductive track 400 can enable the light fixture to achieve both mechanical connection and electrical connection in the same cavity, and the connection is reliable. The overall conductive track 400 is also narrower, with a good visual sense.
[0050] As Figure 2 - Figure 6As shown, the conductive track 400 is used to install the lamp 500, which includes a track body 1 and electrode strips 2. Specifically, the track body 1 includes two relatively arranged side arms 11 and a connecting arm 12 connecting the two side arms 11. The connecting arm 12 and the two side arms 11 form a receiving space (not labeled) for installing the lamp 500. A limiting groove 121 is provided on the side of the connecting arm 12 facing the lamp. The electrode strip 2 is laid on the connecting arm 12 and received in the limiting groove 121. Protruding stop portions 111 are provided on both side arms 11, that is, the stop portions 111 extend from the corresponding side arms 11 towards the lamp 500. A connecting cavity 110 is jointly formed between the stop portions 111 and the corresponding side arms 11 and the limiting groove 121. The connecting cavity 110 is configured to allow the lamp 500 to be inserted and mechanically connected to the stop portions 111 while being electrically connected to the electrode strip 2. The overall conductive track 400 is also narrower. Preferably, the width between the two side arms 11 inside the conductive track 400 is 17 mm, and the width of the lamp 500 is 16 mm, achieving an ultra-narrow design of the track lamp 200.
[0051] The limiting groove 121 includes a first groove 1211 and a second groove 1212 that are arranged from the inside to the outside and communicate with each other. The cross-sectional area of the second groove 1212 is larger than that of the first groove 1211. The first groove 1211 gradually narrows towards the connection with the second groove 1212. The opposite sides at the opening of the second groove 1212 extend towards the electrode strip 2, narrowing the opening of the limiting groove 121. When the electrode strip 2 is located in the limiting groove 121, it can prevent the electrode strip 2 from falling off from the limiting groove 121.
[0052] In this embodiment, the electrode strip 2 is in a long strip shape. The electrode strip 2 includes a substrate 21 and a conductive sheet 22 laid on the substrate 21. Preferably, the substrate 21 is made of an insulating material. An extending mounting portion 211 is provided on the side of the substrate 21 facing the limiting groove 121. The mounting portion 211 is received in the first groove 1211. The mounting portion 211 gradually widens from the connection end to the free end, and inclined surfaces are formed on the opposite outer sides of the mounting portion 211. Corresponding inclined surfaces are provided on the opposite inner sides in the first groove 1211. When the electrode strip 2 is inserted from one end of the limiting groove 121, when the electrode strip 2 is assembled on the track body 1, it will not easily fall off from the track body 1.
[0053] The conductive sheet 22 is also fixed on the side of the substrate 21 facing the lamp 500 by the above-mentioned method of clamping and engaging through inclined surfaces. After the conductive sheet 22 is assembled on the substrate 21, it will not easily fall off from the substrate 21. The design of the electrode strip 2 enables the electrode strip 2 to adapt to a narrower track body 1, and the electrode strip 2 is easier to insert into the limiting groove 121. After the electrode strip 2 is assembled, it will not be displaced or loosened. Furthermore, the power supply at the bottom of the lamp 500 is more stable after installation, and there will be no situation of poor contact and flashing when the lamp 500 is lit.
[0054] The number of the limiting slots 121 matches that of the electrode strips 2, and all the limiting slots 121 are arranged side by side. The conductive track 400 includes at least two electrode strips 2 with opposite polarities. In this embodiment, there are two electrode strips 2, and the two electrode strips 2 have opposite polarities and can be adapted to different lamps 500. There are two corresponding limiting slots 121 which are arranged side by side on both sides of the connecting arm 12 close to the side arms 11. A reinforcing portion 122 is provided between the two limiting slots 121. The reinforcing portion 122 divides the connecting cavity 110 into a first connecting cavity 1101 and a second connecting cavity 1102 to mechanically and electrically connect the corresponding two sides of the lamp 500.
[0055] The reinforcing portion 122 is provided with a hollow interior. While ensuring the overall strength of the track body 1, the overall weight of the track body 1 is reduced. Preferably, one side of the two limiting slots 121 close to the side arms 11 is also connected to the corresponding side arm 11 to form an inclined surface from the opening. In the first connecting cavity 1101 and the second connecting cavity 1102, the inclined surface is located above the stopping portion 111 to increase the biting force between the lamp 500 and the inner walls of the first connecting cavity 1101 and the second connecting cavity 1102 after the lamp 500 is inserted into the connecting cavity 110, avoid the shaking of the lamp 500, and make the mechanical connection of the lamp 500 more stable.
[0056] The conductive track 400 further includes an electrical connector 3 electrically connected to the two electrode strips 2. The electrical connector 3 includes an electrical connection portion 31 at least partially extending out of the track body 1 and connected to the mains power supply. The electrical connection portion 31 is electrically connected to the electrode strip 2 to energize the electrode strip 2, thereby realizing the illumination of the lamp 500. The conductive track 400 further includes end caps (not shown) connected to the track body 1. There are two end caps, which are snap-fitted at both ends of the track body 1 in the longitudinal direction. Through holes for the electrical connection portion 31 to extend out are provided on the end caps.
[0057] As Figure 7 shown, the lamp 500 is provided with a conductive portion 4 in electrical contact with the electrode strip 2 and a clamping portion 5 cooperating with the stopping portion 111. And in the longitudinal direction of the track body 1, the conductive portion 4 and the clamping portion 5 are located on the same straight line so that the conductive portion 4 and the clamping portion 5 can be inserted into the connecting cavity 110 simultaneously. There are two conductive portions 4, which are arranged to elastically protrude towards the electrode strip 2.
[0058] Preferably, the two conductive portions 4 are arranged in parallel and are respectively in contact with the two electrode strips 2 to realize the energization and illumination of the lamp 500. The clamping portion 5 has at least two and is arranged to be elastically deformed under an external force. The clamping portion 5 can cooperate with the inclined surface in the connecting cavity 110 and can also slide relative to the stopping portion 111 to realize the position change of the lamp 500 on the basis of meeting the connection strength.
[0059] In this embodiment, the lamp 500 is rectangular. Preferably, there are four clamping portions 5, and they are grouped in pairs. The two groups of clamping portions 5 are respectively located at both ends of the lamp 500 to ensure stable connection of the lamp 500. Of course, in other embodiments, the lamp 500 can also be cylindrical. As long as the number of the clamping portions 5 is adjusted to ensure stable connection of the lamp 500, there is no limitation in this regard.
[0060] As Figure 5 and Figure 8 - Figure 9 shown, in one embodiment, the lamp 500 is embedded in the track body 1. At this time, an accommodation space 10 for accommodating the lamp 500 is provided inside the track body 1. The accommodation space 10 is jointly formed by the connecting arm 12 and the two side arms 11. After the lamp 500 is installed, light is emitted from the sides of the two side arms 11 away from the connecting arm 12. A mask (not shown) is also clamped and installed at one end of the two side arms 11 away from the connecting arm 12. The mask can protect and reduce the deformation of the track body 1 during transportation. When the lamp 500 is accommodated in the accommodation space 10, the mask is clamped at the position on the two side arms 11 where the lamp 500 is not installed, preventing dust and the like from entering the inside of the track body 1.
[0061] Convex flanks 13 are respectively provided on the outer wall surfaces of the two side arms 11. The two flanks 13 are respectively perpendicular to the outer wall surfaces of the two side arms 11. A plurality of mounting holes 131 for inserting the fixing member 600 are provided on the flanks 13, so as to install the track body 1 to the installation surface by using the fixing member 600 to pass through the mounting holes 131. When installing the track body 1, the connecting arm 12 extends into the installation surface until the flank 13 contacts the installation surface, and wavy lines are provided on both the upper and lower surfaces of the flank 13. The two flanks 13 are arranged away from the connecting arm 12, so that the flanks 13 can adapt to more installation surfaces with different thicknesses.
[0062] A chute 14 is provided on each track body 1. Specifically, the chute 14 is located on the side of the connecting arm 12 away from the limiting groove 121. A part of the connecting device 300 is accommodated in the chute 14 to connect two adjacent track bodies 1. The connecting device 300 can meet the requirements of multiple installation scenarios.
[0063] The connecting device 300 includes a connecting piece 6 and a steering connecting piece 7. The connecting piece 6 is a strip-shaped plate, and threaded holes are provided at both ends of the connecting piece 6. Threaded holes corresponding to the positions in the chute 14 are also provided at both ends of each track body 1. The steering connecting piece 7 has an L-shaped structure. The steering connecting piece 7 is provided with a card slot 71 communicating with the chute 14, and threaded holes are provided at both ends of the steering connecting piece 7 and located in the card slot 71.
[0064] The track body 1 of the embedded lamp 500 is spliced in the following way: when two adjacent track bodies 1 are spliced in a straight line, it is only necessary to align the threaded holes at both ends of the connecting piece 6 with the threaded holes on the two adjacent track bodies 1, and fix the two ends of the connecting piece 6 in the corresponding slide grooves 14 of the two track bodies 1 by two screws 8 to connect the two track bodies 1. When two adjacent track bodies 1 are spliced inwardly or outwardly, the steering connector 7 is located between the two track bodies 1 and connected to the corresponding track body 1 through the connecting piece 6, that is, one end of the connecting piece 6 is fixed in the slide groove 14 and the other end is fixed in the card slot 71. The two adjacent track bodies 1 are connected, and the conduction of the internal electrode strips 2 is achieved by equipping the electrical connector 3.
[0065] like Figure 10 - Figure 14 As shown, in another embodiment, the lamp 500 is surface mounted, and the lamp 500 is exposed on the track body 1. The heightened design of the ends of the two side arms 11 away from the connecting arm 12 can achieve the guiding effect of the lamp installation and the straight visual edge effect of the side after the lamp is installed. The ends of the two side arms 11 away from the connecting arm 12 are snap-fitted with a mask (not shown), and the mask is snap-fitted with the stopper 111 to protect and reduce the deformation of the track body 1 during transportation. When the lamp 500 is inserted into the connecting cavity, the mask is snap-fitted to the position of the two side arms 11 where the lamp 500 is not installed. Prevent dust and the like from entering the interior of the track body 1.
[0066] The reinforcing portion 122 is provided with a fixing hole 123 which is perpendicular to the longitudinal direction of the track body 1 and penetrates the track body 1, so as to allow the fixing member 600 to be inserted and the track body 1 to be directly mounted on the mounting surface without the need for grooving the mounting surface. In this embodiment, the mounting surface can be a ceiling or an indoor wall, which is not limited.
[0067] Each track body 1 is provided with a slide groove 14', and the reinforcing part 122 is provided with a slide groove 14' along the longitudinal direction of the track body 1. The connecting device 300' is partially received in the slide groove 14' to connect two adjacent track bodies 1. The connecting device 300' can meet the requirements of multiple installation scenarios.
[0068] The connecting device 300' is in an L-shaped or straight-line structure to achieve straight-line splicing or inward or outward splicing of two adjacent track bodies 1. The two ends of the connecting device 300' are provided with a connecting portion 6' and a plug-in unit 7' located at the middle position above the connecting portion 6' and parallel to the connecting portion 6'. The connecting portion 6' is also provided with a clamping platform 8' extending toward the plug-in unit 7' on both sides of the plug-in unit 7'. A spring piece 9' is fixedly installed on the side of the clamping platform 8' facing the plug-in unit 7', and the spring piece 9' connects the two ends of the connecting device 300'.
[0069] When the track body 1 of the surface-mounted lamp 500 is spliced, the connecting part 6' is located between the two side arms 11. The clamping table 8' is clamped and matched with the stopping part 111. The plug-in part 7' is inserted into the sliding groove 14' to be mechanically connected to the track body 1. The elastic piece 9' is inserted into the limiting groove 121 to be electrically connected to the electrode strip 2. Thus, the mechanical splicing and electrical conduction of two adjacent track bodies 1 are realized through the connecting device 300'.
[0070] Certainly, in other embodiments, the structure of the track body 1 can be adjusted so that the splicing method of the track body 1 of the recessed lamp 500 is applied to the splicing of the track body 1 of the surface-mounted lamp 500, or the splicing method of the track body 1 of the surface-mounted lamp 500 is applied to the splicing of the track body 1 of the recessed lamp 500, that is, the splicing methods of two adjacent track bodies 1 are interchanged, and no limitation is made thereto.
[0071] In summary, for the conductive track 400 of the present utility model, the protruding stopping parts 111 are arranged on both side arms 11, and then a connecting cavity 110 is formed between the stopping parts 111 and the limiting grooves 121. Thus, when the lamp 500 is inserted into the connecting cavity 110, it can be mechanically connected to the stopping part 111 and electrically connected to the electrode strip 2 at the same time. Compared with the prior art, the conductive track 400 of the present utility model can enable the lamp 500 to realize mechanical connection and electrical connection in the same connecting cavity 110, with convenient operation and reliable connection. Moreover, the track structure is simplified, the overall track is narrower, and the visual sense is good.
[0072] The above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit them. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present utility model can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present utility model.
Claims
1. A conductive track, characterized in that: The conductive track (400) comprises: The track body (1) comprises two side arms (11) arranged opposite to each other and a connecting arm (12) connecting the two side arms (11), wherein the connecting arm (12) and the two side arms (11) form a receiving space for installing a lamp (500), and a limiting groove (121) is provided on a side of the connecting arm (12) facing the lamp (500); An electrode strip (2) is laid on the connecting arm (12) and accommodated in the limiting groove (121); Wherein, both side arms (11) are provided with a protruding stopper (111), a connecting cavity (110) is formed between the stopper (111) and the limiting groove (121), and the connecting cavity (110) is configured to allow the lamp (500) to be inserted and mechanically connected to the stopper (111) while being electrically connected to the electrode strip (2).
2. The conductive track according to claim 1, characterized in that: The conductive track (400) comprises at least two electrode strips (2) of opposite polarity, and the conductive track (400) further comprises an electrical connector (3) electrically connected to the two electrode strips (2), the electrical connector (3) comprising an electrical connection portion (31) at least partially extending out of the track body (1) and connected to the mains, the electrical connection portion (31) being electrically connected to the electrode strips (2).
3. The conductive track according to claim 2, characterized in that: The number of the limiting grooves (121) matches the number of the electrode strips (2), and all the limiting grooves (121) are arranged side by side.
4. The conductive track according to claim 1, characterized in that: The outer wall surface of the side arm (11) is provided with a protruding side wing (13), and the side wing (13) is provided with a mounting hole (131) for inserting a fixing member (600).
5. The conductive track according to claim 4, characterized in that: A sliding groove (14) is provided on a side of the connecting arm (12) facing away from the limiting groove (121).
6. A track light, characterized in that: include: A conductive track (400) as claimed in any one of claims 1 to 5; A lamp (500) mounted on the track body (1); The lamp (500) is provided with a conductive portion (4) in electrical contact with the electrode strip (2) and a clamping portion (5) cooperating with the stop portion (111), and in the longitudinal direction of the track body (1), the conductive portion (4) and the clamping portion (5) are located on the same straight line.
7. The track light according to claim 6, characterized in that: The conductive parts (4) are provided with two and are arranged to elastically protrude toward the electrode strip (2); the clamping parts (5) are provided with at least two and are arranged to be elastically deformable under the action of an external force.
8. A track light system, characterized in that: include: At least two track lights (200) according to claim 6 or 7; A connecting device, located between two adjacent track lights (200) to connect the track bodies (1) of the two adjacent track lights (200); Wherein, each track body (1) is provided with a slide groove, and the connection device is partially received in the slide groove to connect two adjacent track bodies (1).
9. The track light system according to claim 8, characterized in that: The connecting device comprises a connecting piece (6) and a steering connecting piece (7); the steering connecting piece (7) is provided with a clamping groove (71) connected to the sliding groove; one end of the connecting piece (6) is fixed in the sliding groove, and the other end is fixed in the clamping groove (71).
10. The track light system according to claim 8, characterized in that: The connecting device is provided with a plug-in unit (7') and spring sheets (9') located on both sides of the plug-in unit (7'); the plug-in unit (7') is configured to be inserted into the slide groove to be mechanically connected to the track body (1); and the spring sheets (9') are configured to be inserted into the limiting groove (121) to be electrically connected to the electrode strip (2).