Hidden track joint

Abstract

The invention relates to the technical field of lamps, in particular to a hidden track connector which comprises a shell, a control module, a hidden conductive structure and a multi-gear switch structure. The hidden conductive structure comprises a rotating assembly and a conductive assembly, the rotating assembly comprises a rotating locking piece, a rotating column, a left movable block, a right movable block and a reset piece, the rotating locking piece is arranged on the rotating column and used for driving the rotating column to rotate, the left movable block and the right movable block are symmetrically arranged on the two sides of the rotating column, and the rotating column is provided with two protruding blocks in a protruding mode; the two protruding blocks are symmetrically arranged on the two sides of the rotating column, the left movable block is provided with a left movable groove, the right movable block is provided with a right movable groove, and the two protruding blocks move in the left movable groove and the right movable groove respectively. The reset piece is located between the left movable block and the right movable block. The rail connector can be hidden in the rail, whether the conductive assembly is powered on or not is rapidly controlled, the structure is simple, and the production cost is low.

Description

Technical Field

[0001] The present invention relates to the technical field of lamps, and in particular to a hidden track joint. Background Art

[0002] Track lights are a common lighting device, widely used in commercial, residential, and industrial lighting applications due to their flexibility and modular design. Traditional track lights typically connect to the power rail via a dedicated electrical box to transmit power and secure the fixture. However, existing electrical box designs still have certain technical flaws, impacting the aesthetics and practicality of track lights.

[0003] Currently, most track light electrical boxes on the market have parts that protrude from the track after installation, as shown in patent CN202320179037.X. This design not only prevents the lamp from being completely concealed within the track, affecting its overall aesthetics, but also increases the risk of collision or damage due to the exposed structure. Furthermore, these electrical boxes often employ complex mechanical structures, increasing manufacturing costs and installation difficulties.

[0004] To solve the above problems, patent CN202410554177.X proposed a hidden electrical box design. This solution optimizes the structure so that the electrical box can be completely embedded in the rail after installation, thereby achieving concealed installation of the track light. Figure 6 As shown, its internal structure design is relatively complex and involves more parts, which not only increases the production cost, but also increases the overall weight of the electrical box, thereby increasing the comprehensive cost of transportation, installation and long-term use.

[0005] Therefore, there is an urgent need for a simple, lightweight electrical box design that can be completely hidden within the track, so as to reduce manufacturing costs while ensuring aesthetics and improve the market competitiveness of track lights. The present invention aims to provide an optimized hidden track light solution to solve the above technical problems. Summary of the Invention

[0006] The present invention aims to solve the problems of the prior art and provides a hidden rail joint, which can hide the rail joint in the rail, realize rapid control of whether the conductive component is connected to electricity, and has a simple structure and low production cost.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions: a hidden rail joint, comprising a housing, a control module, a hidden conductive structure and a multi-position switch structure;

[0008] The hidden conductive structure includes a rotating component and a conductive component, the rotating component includes a rotating lock piece, a rotating column, a left movable block, a right movable block and a reset piece, the rotating lock piece is mounted on the rotating column and is used to drive the rotation of the rotating column, the left movable block and the right movable block are symmetrically arranged on both sides of the rotating column, the rotating column is protruded with two protrusions, and the two protrusions are symmetrically arranged on both sides of the rotating column, the left movable block is provided with a left movable groove, the right movable block is provided with a right movable groove, and the two protrusions are movable in the left movable groove and the right movable groove respectively; the reset piece is located between the left movable block and the right movable block;

[0009] The conductive assembly includes a plurality of conductive sheets, the left movable block is equipped with the conductive sheets, and the right movable block is equipped with the conductive sheets; the housing is provided with a through slot for the conductive sheets to protrude;

[0010] When the rotating column is controlled to rotate, the protrusion rotates with the rotating column as the center of the circle. When the rotating column rotates to the position of the two protrusions so that the distance between the left movable block and the right movable block is maintained at the maximum, the conductive sheet assembled on the left movable block and the conductive sheet assembled on the right movable block both protrude from the through slot to be electrically connected to the external guide rail. When the position of the two protrusions continues to move so that the distance between the left movable block and the right movable block is not the maximum, the reset member is used to reset the left movable block and the right movable block so that the conductive sheet moves into the housing.

[0011] The conductive component is connected to the control module signal through a multi-position switch structure, and the multi-position switch structure is used to adjust the operating voltage provided to the control module.

[0012] Preferably, the left movable groove includes a left arc-shaped groove and a left straight groove that are interconnected, the bottom of the left arc-shaped groove is arc-shaped, and the bottom of the left straight groove is tangent to the bottom of the left arc-shaped groove; the right movable groove includes a right arc-shaped groove and a right straight groove that are interconnected, the bottom of the right arc-shaped groove is arc-shaped, and the bottom of the right straight groove is tangent to the bottom of the right arc-shaped groove.

[0013] Preferably, the left movable block is provided with a left conductive slot for assembling a conductive sheet, and the right movable block is provided with a right conductive slot for assembling a conductive sheet;

[0014] The left movable block is provided with a left clamping slot, and the right movable block is provided with a right clamping slot. A clamping slot for assembling a rotating column is formed between the left clamping slot and the right clamping slot.

[0015] Preferably, the left movable block is provided with a left reset block at one end away from the through slot, and the right movable block is provided with a right reset block at one end away from the through slot, and the two ends of the reset member respectively abut against the left reset block and the right reset block.

[0016] Preferably, a rotating protrusion is provided on the top of the rotating column, the rotating locking piece is hinged to the rotating protrusion, and the outer shell is provided with a groove. When the rotating locking piece moves into the groove, one side of the rotating locking piece is in contact with the bottom of the groove, and the other side of the rotating locking piece is flush with the outer surface of the outer shell.

[0017] Preferably, the multi-speed switch structure includes a fixed seat, a gear switching seat, a mounting seat and at least two gear switching conductive parts, the gear switching conductive part is installed on the mounting seat, the fixed seat is provided with a sliding cavity, the gear switching seat is assembled in the sliding cavity, the fixed seat is provided with a plurality of conductive plates, the gear switching seat is provided with at least two gear holes, the gear switching seat is provided with a cavity, the gear switching conductive part is located in the cavity, and one gear switching conductive part is provided corresponding to one gear hole; the conductive plate is provided with a protrusion, and when the gear switching seat moves until the protrusion is inserted into the corresponding gear hole, the protrusion contacts the corresponding gear switching conductive part; different gear holes are located at different radial positions of the gear switching seat.

[0018] Preferably, the gear switching seat is equipped with a switching handle, and the switching handle protrudes from the sliding cavity, and the gear switching seat is driven to move by bending the switching handle.

[0019] Preferably, the gear switching seat is provided with a plurality of gear slots, each of the gear slots is provided with a gear hole and at least one limit step. When a protrusion of the conductive sheet is inserted into the corresponding gear hole, the protrusions of other conductive sheets are limited to the limit step, and the protrusions are separated from the gear switching conductive part by the limit step.

[0020] Preferably, the mounting seat is provided with a clamping block, the fixing seat is provided with a limiting hole, and after the gear switching seat is assembled in the sliding cavity, the mounting seat is assembled in the fixing seat, and the clamping block is clamped in the limiting hole.

[0021] Preferably, the housing is provided with an anti-foolproof block, and after the housing is assembled on the track, the anti-foolproof block abuts against the bottom of the track.

[0022] Beneficial effects of the present invention:

[0023] 1. The track light can be completely hidden in the track;

[0024] 2. The structure is simple, easy to produce and assemble, and helps to reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The structure of the present invention is schematically shown Figure 1 ;

[0026] Figure 2 is a cross-sectional view of the present invention;

[0027] Figure 3 It is a schematic structural diagram of the rotating assembly and the conductive assembly of the present invention;

[0028] Figure 4 It is a structural schematic diagram of the left movable block, the right movable block and the reset member of the present invention;

[0029] Figure 5 Schematic diagram of the structure of the rotating column of the present invention;

[0030] Figure 6 The structure of the left movable block of the present invention is shown as follows Figure 1 ;

[0031] Figure 7 The structure of the left movable block of the present invention is shown as follows Figure 2 ;

[0032] Figure 8 This is a schematic diagram of the structure of the multi-position switch structure of the present invention assembled in a housing;

[0033] Figure 9 It is a structural schematic diagram of the multi-position switch structure of the present invention;

[0034] Figure 10 This is a schematic diagram of the exploded structure of the multi-position switch structure of the present invention;

[0035] Figure 11 is a cross-sectional view of the present invention;

[0036] Figure 12 This is a schematic diagram of the structure of the present invention installed on a track;

[0037] Figure 13 is a cross-sectional view of the present invention and the track;

[0038] Figure 14 The structure of the present invention is schematically shown Figure 2 .

[0039] exist Figures 1 to 14 Reference numerals in the figures include:

[0040] 1-housing, 2-rotating lock piece, 3-rotating column, 4-left movable block, 5-right movable block, 6-reset piece, 7-protrusion, 8-left movable groove, 9-right movable groove, 10-conductive sheet, 11-through groove, 12-left arcuate groove, 13-left linear groove, 14-right arcuate groove, 15-right linear groove, 16-left conductive groove, 18-left card slot, 19-right card slot, 20-left reset block, 21-right reset block, 22-left hinge shaft, 24-rotating protrusion, 25-fixed seat, 26-gear switching seat, 27-mounting seat, 28-gear switching conductive piece, 29-gear hole, 30-cavity, 31-protrusion, 32-switching handle, 33-limiting step, 34-card block, 35-limiting hole, 36-conductive assembly groove, 37-anti-foolproof block, 38-support block. DETAILED DESCRIPTION

[0041] In order to facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the embodiments and the accompanying drawings. The contents mentioned in the embodiments are not intended to limit the present invention. The present invention will be described in detail below with reference to the accompanying drawings.

[0042] This embodiment provides a hidden rail joint, such as Figures 1 to 7 , including a housing 1, a rotating component and a conductive component. The control module is a prior art, that is, the control of the lamp is realized by the corresponding circuit, and this embodiment will not be described in detail; the rotating component includes a rotating lock piece 2, a rotating column 3, a left movable block 4, a right movable block 5 and a reset member 6. The rotating lock piece 2 is mounted on the rotating column 3 and is used to drive the rotation of the rotating column 3. The left movable block 4 and the right movable block 5 are symmetrically arranged on both sides of the rotating column 3. The rotating column 3 is protruding with two protrusions 7, and the two protrusions 7 are symmetrically arranged on both sides of the rotating column 3. The left movable block 4 is provided with a left movable groove 8, and the right movable block 5 is provided with a right movable groove 9. The two protrusions 7 move in the left movable groove 8 and the right movable groove 9 respectively; the reset member 6 is located between the left movable block 4 and the right movable block 5;

[0043] The conductive assembly includes a plurality of conductive sheets 10, the left movable block 4 is equipped with the conductive sheets 10, and the right movable block 5 is equipped with the conductive sheets 10; the housing 1 is provided with a through slot 11 for the conductive sheets 10 to protrude;

[0044] When the rotating column 3 is controlled to rotate, the protrusion 7 rotates with the rotating column 3 as the center. When the rotating column 3 rotates to the position of the two protrusions 7 so that the distance between the left movable block 4 and the right movable block 5 is maintained at the farthest, the conductive sheet 10 assembled on the left movable block 4 and the conductive sheet 10 installed on the right movable block 5 both protrude from the through slot 11 to be electrically connected to the external guide rail; when the position of the two protrusions 7 continues to move so that the distance between the left movable block 4 and the right movable block 5 is not the farthest, the reset member 6 is used to reset the left movable block 4 and the right movable block 5 so that the conductive sheet 10 moves into the outer casing 1.

[0045] Among them, the left movable groove 8 includes a left arc-shaped groove 12 and a left straight groove 13 that are interconnected, the bottom of the left arc-shaped groove 12 is arc-shaped, and the bottom of the left straight groove 13 is tangent to the bottom of the left arc-shaped groove 12; the right movable groove 9 includes a right arc-shaped groove 14 and a right straight groove 15 that are interconnected, the bottom of the right arc-shaped groove 14 is arc-shaped, and the bottom of the right straight groove 15 is tangent to the bottom of the right arc-shaped groove 14.

[0046] Specifically, if Figure 1 As shown, the housing 1 and the through slot 11 provided on the housing 1 of this embodiment are conventional technologies, and the through slot 11 only needs to be matched with the conductive sheet 10. Figure 1 As shown, when the rotating lock piece 2 is fixed on the housing 1, the positions between the rotating column 3 and the left movable block 4 and the right movable block 5 are as shown in FIG. Figure 2As shown, one protrusion 7 is located at the junction of the left arcuate groove 12 and the left linear groove 13, and the other protrusion 7 is located at the junction of the right arcuate groove 14 and the right linear groove 15. That is, at this time, the protrusion 7 is located in the middle of the left movable block 4 and the right movable block 5. At this time, the distance between the left movable block 4 and the right movable block 5 is the farthest. That is, driven by the protrusion 7, the left movable block 4 and the right movable block 5 respectively move away from the rotating column 3 (until the distance between them is the farthest), thereby driving one end of the conductive sheet 10 to move outside the through groove 11, contacting the external guide rail and energizing it. The other end of the conductive sheet 10 is located inside the housing 1, and is used to contact and conduct electricity to the control circuit board, etc. inside the housing 1. At this time, the reset member 6 is in a compressed state. Because the rotating lock plate 2 is locked in the groove of the housing 1, the rotating column 3 will not rotate. The positions of the left movable block 4 and the right movable block 5 are fixed, maintaining the conductive function of the conductive sheet 10. When the conductive sheet 10 needs to be released from contact with the external guide rail, the rotating lock plate 2 is moved to remove the rotating lock plate 2 from the groove and the rotating lock plate 2 can be rotated. The rotating lock plate 2 drives the rotating column 3 to rotate, and then the two protrusions 7 rotate. At this time, there is no restriction of the protrusion 7 between the left movable block 4 and the right movable block 5. Therefore, under the auxiliary action of the reset member 6, the left movable block 4 and the right movable block 5 are both rotated toward the rotating column 3, thereby driving the conductive sheet 10 to move into the housing 1 and completing the release from the guide rail. The structure of the rotary module of this embodiment is simple. The movement of the left movable block 4 and the right movable block 5 is controlled by the rotation of the rotating column 3 to achieve conductive connection or disconnection. The structures of the left movable block 4 and the right movable block 5 are simple, so the rotary module is easy to install, which is convenient for improving production efficiency and reducing production costs.

[0047] Furthermore, the structure of the left movable block 4 in this embodiment is as follows Figure 6 and Figure 7 As shown, the structure of the right movable block 5 is the same as that of the left movable block 4. The left movable block 4 is provided with a left conductive groove 16 for assembling the conductive sheet 10, and the right movable block 5 is provided with a right conductive groove for assembling the conductive sheet 10. The left movable block 4 is provided with a left card slot 18, and the right movable block 5 is provided with a right card slot 19. A card slot for assembling the rotating column 3 is formed between the left card slot 18 and the right card slot 19, which is easy to assemble.

[0048] Furthermore, if Figure 4 The left movable block 4 is provided with a left reset block 20 at one end away from the through slot 11, and the right movable block 5 is provided with a right reset block 21 at one end away from the through slot 11. The two ends of the reset member 6 respectively abut against the left reset block 20 and the right reset block 21; the left movable block 4 is provided with a left hinge shaft 22, and the right movable block 5 is provided with a right hinge shaft. The left hinge shaft 22 and the right hinge shaft are used to be hinged to the outer shell 1 or the hinge hole provided in the outer shell 1.

[0049] Specifically, the reset member 6 is preferably a spring, and the spring's reset function is achieved through the cooperation of the left reset block 20 and the right reset block 21. In addition, in order to enable the left movable block 4 and the right movable block 5 to rotate normally, a left hinge axis 22 and a right hinge axis are provided. For example, a hinge hole can be provided in the housing 1 to enable the left movable block 4 to rotate along the left hinge axis 22 and the right movable block 5 to rotate along the right hinge axis, thereby maintaining the stability of the movement of the conductive sheet 10. Of course, the hinge hole can also be provided on other structures in the housing 1, such as a switch structure (not shown in the drawings), to maintain the adaptability and stability of the structure.

[0050] like Figure 1 and Figure 5 As shown, a rotating protrusion 24 is provided at the top of the rotating column 3, and the rotating locking piece 2 is hingedly connected to the rotating protrusion 24. The housing 1 is provided with a groove. When the rotating locking piece 2 moves into the groove, one side of the rotating locking piece 2 abuts against the bottom of the groove, and the other side of the rotating locking piece 2 is flush with the outer surface of the housing 1. Specifically, the hinged structure between the rotating locking piece 2 and the rotating protrusion 24 is conventional. When the rotating locking piece 2 rotates into the groove, it can lock with the rotating protrusion 24. The structure disclosed in patent CN202410554177.X is referenced and will not be described in detail in this embodiment.

[0051] The multi-position switch structure of this embodiment is as follows: Figures 8 to 11 , including a fixed seat 25, a gear switching seat 26, a mounting seat 27 and at least two gear switching conductive members 28, the mounting seat 27 is provided with a gear cutting groove, the gear switching conductive member 28 is assembled in the gear cutting groove, the fixed seat 25 is provided with a sliding cavity, the gear switching seat 26 is assembled in the sliding cavity, the fixed seat 25 is equipped with a plurality of conductive sheets 10, the fixed seat 25 is provided with a plurality of conductive assembly grooves 36, and the conductive sheets 10 are fixed behind the conductive assembly grooves 36. The gear switching seat 26 is provided with at least two gear holes 29, and the gear switching seat 26 is provided with a cavity 30. The gear switching conductive member 28 is located in the cavity 30, and one gear switching conductive member 28 is provided corresponding to one gear hole 29; the conductive sheet 10 is provided with a protrusion 31, when the gear switching seat 26 moves until the protrusion 31 is inserted into the corresponding gear hole 29, the protrusion 31 contacts the corresponding gear switching conductive member 28; different gear holes 29 are located at different radial positions of the gear switching seat 26.

[0052] Specifically, if Figure 8 and Figure 9 As shown, the product of this embodiment is installed in the corresponding rail joint to achieve the purpose of adjusting the power supply gear. This embodiment takes three gears as an example, that is, there are three conductive sheets 10, three gear switching conductive members 28, and three gear holes 29 of the gear switching seat 26. Figure 9, the conductive sheet 10 is installed in the corresponding position of the fixing seat 25, and the conductive sheet 10 is used to electrically connect with the external guide rail (one end of the conductive sheet 10 can be turned out of the housing of the track joint to contact the track, which will not be described in detail in this embodiment), the gear switching seat 26 is assembled into the sliding cavity of the fixing seat 25, and the gear switching conductive member 28 is assembled in the mounting seat 27, and one end is inserted into the cavity 30 of the gear switching seat 26, the protrusion 31 of the conductive sheet 10 is located above or below the gear switching conductive member 28, and the positions of the three gear holes 29 provided in the gear switching seat 26 are as shown Figure 10 As shown, one side of the gear switching seat 26 is provided with two gear holes 29, and the other side is provided with one gear hole 29. Of course, the position and number of the holes can be set according to actual needs. The three gear holes 29 are respectively located at different radial positions of the gear switching seat 26, and then as shown in FIG. Figure 11 As shown, only one protrusion 31 can contact the gear switching conductive member 28 through the gear hole 29 at a time. Therefore, by moving the gear switching seat 26, different conductive sheets 10 can be connected to the gear switching conductive member 28, thereby realizing the switching of different gears. In this embodiment, a plurality of gear switching conductive members 28 are connected as an integral structure, and different inputs are connected to the conductive sheet 10. Then, by simply changing the connected conductive sheet 10, the power gear can be switched and output to the control circuit board of the track joint, thereby controlling the operation of the lamp. The gear switching seat 26 of this embodiment has a simple structure. Compared with the prior art, the gear switching seat 26 of this embodiment is convenient for mold production and does not require other matching structures, thereby being more convenient for production and assembly, helping to improve production efficiency and reduce production costs.

[0053] Among them, such as Figure 9 and Figure 10 The shift switch seat 26 is equipped with a shift handle 32. The shift handle 32 protrudes from the sliding cavity. By turning the shift handle 32, the shift switch seat 26 is driven to move. Furthermore, the shift switch seat 26 is provided with a plurality of shift slots, each of which is provided with a shift hole 29 and at least one limit step 33. When the protrusion 31 of one conductive sheet 10 is inserted into the corresponding shift hole 29, the protrusion 31 of the other conductive sheet 10 is limited to the limit step 33, and the protrusion 31 is separated from the shift switching conductive member 28 by the limit step 33.

[0054] Specifically, if Figure 10 and Figure 11The limit steps 33 are arc-shaped grooves, so the protrusion 31 of the conductive sheet 10 can move smoothly to each limit step 33, and the user can feel the movement and sound of the protrusion 31 when the limit steps 33 are replaced, thereby determining the change in gear position. In addition, after this embodiment is assembled into the housing of the track joint, the conductive sheet 10 is squeezed by the housing, which causes the protrusion 31 to tend to move toward the gear hole 29. Therefore, when the gear hole 29 moves to the corresponding protrusion 31 of the conductive sheet 10, the protrusion 31 will be stuck in the gear hole 29 and contact the gear switching conductive member 28, achieving the purpose of conductive connection.

[0055] like Figure 10 As shown, the mounting seat 27 is provided with a clamping block 34, and the fixing seat 25 is provided with a limiting hole 35. After the gear switching seat 26 is assembled into the sliding cavity, the mounting seat 27 is assembled into the fixing seat 25, and the clamping block 34 is engaged with the limiting hole 35. Specifically, after the gear switching seat 26 is inserted into the sliding cavity, the mounting seat 27 is connected to the fixing seat 25, and the clamping block 34 is engaged with the corresponding limiting hole 35. The two are connected in a simple assembly method. The assembled fixing block and mounting seat 27 can then be installed into the track joint.

[0056] In addition, the housing of this embodiment is also provided with a foolproof block 37, such as Figure 12 The following is a schematic diagram of the structure in which the housing is installed on the track. Figure 13 In the direction of the track, the anti-fool block 37 of the housing is located at the bottom of the track, so that a certain space is reserved between the housing and the bottom of the track, thereby facilitating the use of the track screws. There will be no interference between the housing and the track screws, and the housing can be flexibly adjusted on the track. Figure 14 As shown, support blocks 38 are further provided on both sides of the housing. The two support blocks 38 can be snapped onto the rails to prevent the housing from falling.

[0057] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention is disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technology of the present invention are all within the scope of the technical solution of the present invention without departing from the content of the technical solution of the present invention.

Claims

1. A hidden rail joint, characterized by: It includes a housing, a control module and a hidden conductive structure, wherein the hidden conductive structure is connected to the control module signal; The hidden conductive structure includes a rotating component and a conductive component, the rotating component includes a rotating lock piece, a rotating column, a left movable block, a right movable block and a reset piece, the rotating lock piece is mounted on the rotating column and is used to drive the rotation of the rotating column, the left movable block and the right movable block are symmetrically arranged on both sides of the rotating column, the rotating column is protruded with two protrusions, and the two protrusions are symmetrically arranged on both sides of the rotating column, the left movable block is provided with a left movable groove, the right movable block is provided with a right movable groove, and the two protrusions are movable in the left movable groove and the right movable groove respectively; the reset piece is located between the left movable block and the right movable block; The conductive assembly includes a plurality of conductive sheets, the left movable block is equipped with the conductive sheets, and the right movable block is equipped with the conductive sheets; the housing is provided with a through slot for the conductive sheets to protrude; When the rotating column is controlled to rotate, the protrusion rotates with the rotating column as the center of the circle. When the rotating column rotates to the position of the two protrusions so that the distance between the left movable block and the right movable block is maintained at the maximum, the conductive sheet assembled on the left movable block and the conductive sheet assembled on the right movable block both protrude from the through slot to be electrically connected to the external guide rail. When the position of the two protrusions continues to move so that the distance between the left movable block and the right movable block is not the maximum, the reset member is used to reset the left movable block and the right movable block so that the conductive sheet moves into the housing. The conductive component is connected to the control module signal through a multi-position switch structure, and the multi-position switch structure is used to adjust the operating voltage provided to the control module; The left movable groove includes a left arc-shaped groove and a left straight groove that are interconnected, the bottom of the left arc-shaped groove is arc-shaped, and the bottom of the left straight groove is tangent to the bottom of the left arc-shaped groove; the right movable groove includes a right arc-shaped groove and a right straight groove that are interconnected, the bottom of the right arc-shaped groove is arc-shaped, and the bottom of the right straight groove is tangent to the bottom of the right arc-shaped groove.

2. The hidden rail joint according to claim 1, characterized in that: The left movable block is provided with a left conductive slot for assembling a conductive sheet, and the right movable block is provided with a right conductive slot for assembling a conductive sheet; The left movable block is provided with a left clamping slot, and the right movable block is provided with a right clamping slot. A clamping slot for assembling a rotating column is formed between the left clamping slot and the right clamping slot.

3. The hidden rail joint according to claim 1, characterized in that: The left movable block is provided with a left reset block at one end away from the through slot, and the right movable block is provided with a right reset block at one end away from the through slot. The two ends of the reset member respectively abut against the left reset block and the right reset block.

4. The hidden rail joint according to claim 1, characterized in that: A rotating protrusion is provided on the top of the rotating column, the rotating locking piece is hinged to the rotating protrusion, and the shell is provided with a groove. When the rotating locking piece moves into the groove, one side of the rotating locking piece is in contact with the bottom of the groove, and the other side of the rotating locking piece is flush with the outer surface of the shell.

5. The hidden rail joint according to claim 1, characterized in that: It also includes a multi-speed switch structure, which includes a fixed seat, a gear switching seat, a mounting seat and at least two gear switching conductive parts. The gear switching conductive part is installed on the mounting seat, the fixed seat is provided with a sliding cavity, the gear switching seat is assembled in the sliding cavity, the fixed seat is provided with a plurality of conductive plates, the gear switching seat is provided with at least two gear holes, the gear switching seat is provided with a cavity, the gear switching conductive part is located in the cavity, and one gear switching conductive part is provided corresponding to one gear hole; the conductive plate is provided with a protrusion, and when the gear switching seat moves until the protrusion is inserted into the corresponding gear hole, the protrusion contacts the corresponding gear switching conductive part; different gear holes are located at different radial positions of the gear switching seat.

6. The hidden rail joint according to claim 5, characterized in that: The gear switching seat is equipped with a switching handle, which protrudes from the sliding cavity. The gear switching seat is driven to move by bending the switching handle.

7. The hidden rail joint according to claim 5, characterized in that: The gear switching seat is provided with a plurality of gear slots, each of which is provided with a gear hole and at least one limit step. When a protrusion of a conductive sheet is inserted into the corresponding gear hole, the protrusions of other conductive sheets are limited to the limit step, and the protrusions are separated from the gear switching conductive part by the limit step.

8. The hidden rail joint according to claim 5, characterized in that: The mounting seat is provided with a clamping block, and the fixing seat is provided with a limiting hole. After the gear switching seat is assembled in the sliding cavity, the mounting seat is assembled on the fixing seat, and the clamping block is clamped in the limiting hole.

9. The hidden rail joint according to claim 1, characterized in that: The shell is provided with an anti-fool block, and after the shell is assembled on the track, the anti-fool block abuts against the bottom of the track.

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