CN116772174A - Locking limiting mechanism and track lamp comprising same - Google Patents

Abstract

The invention provides a locking and limiting mechanism, which comprises a driving part which is matched with a track box and can be operated, wherein the driving part is limited by the locking part to move in a folding state, the driving part comprises a swing arm, the swing arm moves along an operation plane, and the free end of the swing arm is provided with a clamping hook part which extends towards the inner side of the track box; the locking part can move relative to the operation plane in an operation way, the locking part comprises a sliding block and a buckling block which are fixedly connected, the sliding block at least partially exposes out of the track box, the outer side of the track box is provided with a slot, and the outer side of the track box is communicated with the locking part through the slot; in the retracted state, the clamping hook part is clamped with the buckling block through the slot, and in the opened state, the sliding block vertically moves and enables the buckling block to leave the clamping hook part. The invention also provides a track lamp containing the same. In the locking limit structure, the rotating track of the swing arm is stable, misoperation triggering can be avoided in the unlocking process, and the locking limit structure is suitable for being matched with the installation of the guide rail and simultaneously realized, so that the product has higher reliability.

Description

Locking limiting mechanism and track lamp comprising same

Technical Field

The invention relates to the technical field of lamp installation, in particular to a locking limiting mechanism and a track lamp comprising the same.

Background

The track lamp is the lamp of installing above the track, and the track adapter that the track lamp had all need install in assorted track, contains conductive metal strip in the inside both sides of track, and the track adapter has rotatable conductive metal piece, and during the installation, conductive metal piece above the track lamp contacts the inside conductive metal strip of track, just can realize the track lamp circular telegram, can light the track lamp.

In the existing track lamp, a rotatable cantilever structure is adopted to link the conductive metal sheet, so that the track lamp is conductive with the track contact. For example, in the chinese patent application No. 202011488890.7, "a track adapter, a driving power supply with the adapter, and a track lamp", the electricity taking column is connected with an extended handle, and the handle rotates to drive the electricity taking column to rotate, and the conductive sheet on the electricity taking column rotates to contact with the conductive metal strip inside the track, so as to realize the electrification of the lamp and the track. The handle has the characteristics of convenience and labor saving in operation, and is widely applied.

The cantilever structure in the existing track lamp achieves the positioning of various purposes through the clamping block structure corresponding to the track box, the acting force required by driving the cantilever structure to rotate is small due to the lever principle of the cantilever structure, the track lamp can be operated to rotate when not being completely installed in place sometimes, and the resistance of the clamping block is easily overcome when the unexpected stress or the operation force is overlarge after the installation, so that the conducting strip in the track lamp excessively rotates, the conducting strip is slightly deviated from the set optimal contact position, the hidden trouble of poor contact is caused, the limiting structure of the conducting strip is damaged, and the locking structure is more likely to fail due to forced operation rotation when the installation is not in place.

Accordingly, those skilled in the art have been working to develop a novel locking limit mechanism to improve the stability of the track light mounting connection.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, the present invention aims to solve the problem that the swing arm locking and limiting mechanism is easy to be damaged and disabled when an unexpected stress or an excessive operating force is applied to the track lamp during use.

In order to achieve the above object, the present invention provides a locking and limiting mechanism of a track lamp, comprising a driving part which is cooperatively arranged with a track box and is operable, wherein the driving part at least partially moves along the outer side of the track box, and a locking part which is penetrated at the side part of the track box and is correspondingly arranged with the driving part, wherein the locking part comprises a retracted state and an open state, the locking part limits the movement of the driving part in the retracted state, and the locking part comprises: the driving part comprises a swing arm, the swing arm moves along an operation plane, and the free end of the swing arm is provided with a clamping hook part extending towards the inner side of the track box; the locking part can move relative to the operation plane in an operation way, the locking part comprises a sliding block and a buckling block which are fixedly connected, the sliding block at least partially exposes out of the track box, the outer side of the track box is provided with a slot, and the outer side of the track box is communicated with the locking part through the slot; in the retracted state, the clamping hook part is clamped with the buckling block through the slot, and in the opened state, the sliding block vertically moves and enables the buckling block to leave the clamping hook part.

Further, the driving part also comprises a transmission plate, the transmission plate comprises a rotating shaft movably connected with the track box, and the swing arm is fixedly connected with the transmission plate and rotates along the axis of the rotating shaft.

Still further, drive plate and swing arm detachably connect, are formed with the scarf joint piece on the drive plate, and the swing arm includes the mounting groove with the scarf joint piece adaptation.

Furthermore, the radial dimension of the embedding block along the thickness direction of the embedding block is gradually decreased, the small end of the embedding block faces the mounting groove, and the mounting groove is provided with an anti-falling clamping block corresponding to the embedding block.

Further, a positioning block is formed on the transmission plate, a sliding groove suitable for the movement of the positioning block is formed on the inner side of the track box, and a first protruding part for interfering the positioning block is formed on the sliding groove at a position close to the tail end.

Further, in the locking part, the sliding blocks are arranged at two sides of the buckling block respectively, a clamping groove is formed by matching the sliding blocks with the buckling block, the clamping groove is suitable for the movable passing of the clamping hook part, and a guide surface is arranged on one side of the buckling block, facing the swing arm.

Further, an elastic reset mechanism is arranged between the locking part and the track box.

Further, the free end of the swing arm is also fixedly provided with a handle which extends out of the track box.

Further, the fastening block has a minimum unlocking stroke, and when in an open state, the movement distance of the fastening block is greater than the minimum unlocking stroke, the fastening block can leave the fastening hook part.

Further, the downside of swing arm is provided with the backup pad, and the backup pad is fixed in the track box outside, and the periphery of backup pad is formed with curved rampart, and the rampart inboard and the up end of backup pad are spacing to the swing arm.

The track lamp comprises the locking and limiting mechanism, wherein the power taking head of the track box is arranged between the two side guide rails, the conductive reed is arranged in the track box, an opening is formed in the side face of the track box, the conductive reed stretches out to contact the guide rails, the track box comprises a mounting face, the sliding block penetrates through and exposes out of the mounting face, and when the track lamp is mounted, the mounting face is attached to the bottom face of the guide rails.

In one embodiment of the invention, the hook portion includes an abutment surface that is engaged with the fastening block, and the height of the abutment surface is smaller than the height of the slider exposed to the mounting surface.

Compared with the prior art, the locking and limiting mechanism and the track lamp thereof have the following advantages:

(1) The free end of the swing arm is provided with a clamping hook part and is matched with a locking part to enable the swing arm to be retracted and locked, and the rail lamp is unlocked from the retracted state and needs to apply force to the sliding block, so that misoperation is avoided, and the unlocking operation is suitable for being matched with the installation of the guide rail and is realized at the same time;

(2) The swing arm is matched with other limit structures of the track lamp, so that the movable track of the swing arm is stable, the contact conductive structure is prevented from being deformed and damaged due to improper operation of the swing arm, and the reliability of products is improved.

The conception, specific structure, and technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, features, and effects of the present invention.

Drawings

Fig. 1 is a schematic view of the locking and limiting mechanism of the track lamp of the present invention installed in the track lamp.

Fig. 2 is a schematic diagram showing a cross-sectional structure of the lock limiting mechanism and a positional relationship between the lock limiting mechanism and the guide rail.

Fig. 3 is a schematic diagram showing the positional relationship between the hook portion and the fastening block in the locking and limiting mechanism according to the present invention, wherein (a) and (b) are two different positional configurations.

Fig. 4 is a schematic view of the structure of the driving part and the locking part in the lock limiting mechanism of the present invention.

Fig. 5 is a schematic view of the bottom structure of the driving part in the lock limiting mechanism of the present invention.

Fig. 6 is a schematic view of the locking and spacing mechanism of the present invention installed in a track box.

Fig. 7 is a schematic view of the locking and limiting mechanism of the present invention in an operating state, wherein (a) is in a retracted state and (b) is in an open state.

Fig. 8 is a schematic view of the installation of a track light incorporating a locking and spacing mechanism of the present invention.

Wherein: 100 driving parts, 200 locking parts, 300 track boxes, 310 power taking heads, 320 mounting surfaces, 400 guide rails, 500U-shaped sections, 11 swing arms, 111 mounting grooves, 112 anti-falling clamping blocks, 113 blocking strips, 12 clamping hook parts, 121 abutting surfaces, 13 transmission plates, 131 rotating shafts, 132 embedding blocks, 133 positioning blocks, 14 handles, 21 sliding blocks, 22 buckling blocks, 221 guide surfaces, 222 locking surfaces, 23 clamping grooves, 24 elastic reset mechanisms, 25 guide posts, 31 slots, 32 sliding grooves, 33 first protruding parts, 34 power taking posts, 35 conductive reeds, 36 avoiding grooves, 37 supporting plates, 371 annular walls, 372 second protruding parts and d minimum unlocking strokes.

Detailed Description

Fig. 1 and 2 show a locking and limiting mechanism of a track lamp according to the present invention, which includes a driving part 100 and a locking part 200. Wherein the driving part 100 is operatively connected to the track box 300, and the driving part 100 moves at least partially along the outer side of the track box 300; the locking portion 200 is provided to penetrate the side of the track box 300 in correspondence with the driving portion 100, and includes a retracted state in which the movement of the driving portion 100 is restricted by the locking portion 200 and an open state.

The driving part 100 includes a swing arm 11, the swing arm 11 moves along an operation plane, a free end of the swing arm 11 is provided with a hook part 12 extending toward the inner side of the track box 300, and the hook part 12 is configured to be capable of being engaged with the locking part 200 in a matching manner. In addition, the driving part 100 further comprises a transmission plate 13, the transmission plate 13 comprises a rotating shaft 131 movably connected with the track box 300, and the swing arm 11 is fixedly connected with the transmission plate 13. The free end of the swing arm 11 is fixedly provided with a handle 14, the handle 14 extends out of the track box 300, the swing arm 11 can be driven to rotate by operating the handle 14 by taking the center of the rotating shaft 131 as an axis, and the plane of the rotating track of the swing arm 11 is the operating plane. The track box 300 has an inner cavity in which the drive plate 13 and the like are movable inside the track box 300.

The locking portion 200 is operatively movable with respect to the operating plane and comprises a slider 21 and a snap-in block 22 fixedly connected, the slider 21 at least partially exposing the track box 300, so that the locking portion 200 can be moved on the outside by driving the slider 21 (e.g. pushing, pulling, etc.). The sliding block 21 and the fastening block 22 may be in split type matching connection, and may be connected by a transmission component, or may be connected by integral molding, and the locking portion 200 is driven to move by the movement of the sliding block 21. The outer side of the track box 300 is provided with a slot 31, and the outer side of the track box 300 is communicated with the locking part 200 through the slot 31; the moving direction of the locking portion 200 forms an angle with the operation plane of the swing arm 11, and preferably, the moving direction of the locking portion 200 is perpendicular to the operation plane of the swing arm 11. In the retracted state of the locking portion 200, the hook portion 12 of the swing arm 11 penetrates into the slot 31 to be engaged with the fastening block 22, and in the opened state, the slider 21 moves vertically and the fastening block 22 is separated from the hook portion 12.

In the locking portion 200, a guide surface 221 is provided on a side of the lock block 22 facing the swing arm 11, and a locking surface 222 is provided on a side facing away from the guide surface. Preferably, the guide surface 221 is a slope. The head of the hook 12 is opposite to the guiding surface 221, and the tail forms an abutting surface 121, and the abutting surface 121 is formed by recessing the tail of the hook 12 at one side opposite to the locking portion 200, and may be a vertical straight surface. In the process of moving the hook portion 12 to the fastening block 22, the front end of the hook portion 12 slides along the guide surface 221, and after sliding through the guide surface 221, the locking surface 222 of the fastening block 22 abuts against the abutment surface 121 of the hook portion 12, so as to achieve fastening. The front end of the hook portion 12 is provided so as to be capable of smoothly contacting the guide surface 221, and has a flat inclined surface or a rounded curved surface, for example.

Preferably, the two sliding blocks 21 are respectively arranged and connected at two sides of the fastening block 22, and are matched with the fastening block 22 to form a clamping groove 23, and the clamping groove 23 is suitable for limiting at two sides of the clamping hook 12 when the clamping hook 12 moves through, so that the clamping hook 12 can move in alignment with the guide surface 221. Further, an elastic reset mechanism 24 is provided between the locking portion 200 and the track box 300, alternatively, the elastic reset mechanism 24 is a spring, the fastening block 22 is provided with a receiving groove towards the bottom of the track box 300, and one end of the spring is provided in the receiving groove. Further, the fastening block 22 is connected with a guide post 25, the guide post 25 is movably connected with the track box 300 to enable the locking part 200 to directionally move along the direction of the guide post 25, the spring is arranged at the periphery of the guide post 25, the locking part 200 moves towards the bottom of the track box 300 under the action of external force, and the locking part is reset through the elastic reset mechanism 24 when no external force acts.

In the embodiment shown in fig. 3 (a), the guide surface 221 is an inclined surface inclined inwardly and upwardly. If the swing arm 11 is driven to rotate towards the track box 300, the clamping hook 12 penetrates the slot 31 of the track box 300 to press the guide surface 221, so that the buckling block 22 moves downwards, after the clamping hook 12 slides and passes over the guide surface 221, the pressing force is eliminated, the elastic reset mechanism 24 enables the buckling block 22 to move upwards, and the clamping hook 12 abuts against the buckling block 22, so that a retracted state is formed. When the slider 21 and the fastening block 22 are fixedly connected and the moving direction is consistent, the slider 21 is retracted into the track box 300 by an external force, for example, when moving downward, the fastening block 22 simultaneously moves downward and leaves the hook portion 12 to release the retracted state, and at this time, the swing arm 11 can rotate away from the slot 31 of the track box 300 and swing along the outside of the track box 300.

In another embodiment shown in fig. 3 (b), the guiding surface 221 may also be inclined outwards and upwards, so that the fastening block 22 moves upwards under the action of the pressing of the fastening hook 12 against the guiding surface 221, and when the fastening block 22 is retracted, the fastening block 22 moves downwards in a reset manner, and the locking surface 222 abuts against the fastening hook 12 to prevent the fastening hook 12 from falling out. The movement of the slider 21 drives the catch block 22 to move upwardly away from the catch portion 12, thereby releasing the stowed condition. If the slider 21 is forced to move downward, the slider 21 and the fastening block 22 may be selectively connected by a transmission mechanism, such as a link rod, a gear, etc., which are commonly used by those skilled in the art, in order to enable the fastening block 22 to move upward after transmission, which will not be described herein.

Further, the driving plate 13 and the swing arm 11 are detachably connected, as shown in fig. 4, the driving plate 13 and the swing arm 11 are connected through a matched scarf joint block 132 and a mounting groove 111. For example, in the present embodiment, the free end of the driving plate 13 forms an engagement block 132 cooperatively connected with the swing arm 11, and the swing arm 11 includes a mounting groove 111 adapted to the engagement block 132. The radial dimension of the caulking block 132 in the thickness direction thereof decreases, and optionally, the section of the caulking block 132 is in an inverted trapezoid shape, with the small end of the caulking block 132 facing the mounting groove 111. When the mounting groove 111 is matched and sleeved, the small end of the embedded block 132 is penetrated first, and finally the mounting groove 111 is clamped and matched and fixed with the large end of the embedded block 132; further, the outer portion of the mounting groove 111 opposite to the large end of the engagement block 132 is provided with an anti-disengagement block 112 to prevent the engagement block 132 from being disengaged reversely.

As shown in fig. 5 and 6, the driving plate 13 is formed with a positioning block 133, the inside of the track box 300 is formed with a chute 32 adapted to the movement track of the positioning block 133, and the chute 32 is formed with a first protrusion 33 interfering with the positioning block 133 at a position near the end. When the sliding chute 32 is used, the positioning block 133 rotates along the sliding chute 32, so that the rotation track of the swing arm 11 is stable, and after the resistance of the first protruding part 33 is overcome, the positioning block 133 slides into the tail end of the sliding chute 32 and is restrained by the first protruding part 33 to have a limiting effect.

According to the locking limiting mechanism, the invention further provides a track lamp with the locking limiting mechanism. The track lamp is mounted on a bilateral guide rail 400 arranged in the horizontal direction, a power taking column 34 is mounted in the track box 300, a conductive reed 35 is arranged on the power taking column 34 and extends laterally, the power taking column 34 is fixedly connected with a driving part 100, and the power taking column 34 and the driving part 100 synchronously rotate with a swing arm 11 under the action of the driving part 100. The upper part of the track box 300 is provided with a power taking head 310 which is arranged between the two side guide rails 400, the inner side of the track box 300 is provided with a cavity for the conductive reed 35 to move, and meanwhile, the side surface of the track box 300 is provided with an opening for the conductive reed 35 to extend out to contact the guide rails 400.

The transmission plate 13 is installed in the track box 300, the rotating shaft 131 is vertically arranged, the track box 300 is provided with a mounting surface 320 matched with the guide rail 400, the side surface of the track box 300 is provided with an avoidance groove 36 along the lower side of the mounting surface 320, the free end of the transmission plate 13 extends out of the track box 300 to be connected with the swing arm 11, the swing arm 11 is driven by the handle 14 to rotate outside the track box 300 along the horizontal direction, the rotating plane is limited by the mounting surface 320, and the rotating axis of the swing arm 11 coincides with the central line of the rotating shaft 131 of the transmission plate 13.

The locking part 200 is mounted on the track box 300 to move vertically, the sliding block 21 in the locking part 200 passes through the mounting surface 320 and is exposed above the mounting surface 320, so that when the track box 300 is mounted towards the guide rail 400 from bottom to top, the power taking head 310 of the track box 300 enters between the guide rails 400, the mounting surface 320 is abutted against the bottom surface of the guide rail 400, and the exposed part of the sliding block 21 is pressed to slide inwards of the track box 300. In the locking portion 200, the locking piece 22 has a minimum unlocking stroke d, which is greater than or equal to the concave depth of the abutment surface 121 of the hook portion 12, and the sliding block 21 moves to drive the locking piece 22 to move synchronously, so that the locking piece 22 can leave the hook portion 12 when the moving distance of the locking piece 22 is greater than the minimum unlocking stroke d, and the locking piece 22 still interferes with the hook portion 12 if the moving distance of the locking piece 22 is insufficient, and the hook portion 12 cannot be separated.

As shown in fig. 7, in the retracted state, the hook portion 12 of the swing arm 11 enters the slot 31 of the track box 300 and is limited by the locking portion 200, and at the same time, the conductive reed 35 of the track box 300 is retracted into the inner cavity of the track box 300, and the track box 300 is to be installed; after the track box 300 is correctly installed, the stowing state is released, and in the opening state, the swing arm 11 is operated to rotate, so that the conductive reed 35 rotates and extends out of the track box 300; when the swing arm 11 rotates to the end of the chute 32 to reach the set position, the swing arm 11 is restrained by the first protrusion 33, the position of the swing arm 11 is kept unchanged, and the conductive reed 35 contacts the guide rail 400 in a fixed mode, so that the locking effect is achieved. For example, the conductive spring 35 is accommodated in the inner cavity of the track box 300 at an angle consistent with the length direction of the track box 300 in the retracted state, and rotates with the swing arm 11 after unlocking, and after the swing arm 11 rotates by an angle of 90 °, the conductive spring 35 extends to both sides to contact the guide rail 400, and at this time, the swing arm 11 reaches the set position restrained by the first protrusion 33 of the slide rail. Due to the limitation, the swing arm 11 is not easy to influence the conductive contact state due to external interference.

Preferably, a support plate 37 is fixedly installed at the outer side of the rail box 300, which is disposed at the lower side of the swing arm 11 corresponding to the swing arm 11. The upper end face of the supporting plate 37 is matched and abutted with the swing arm 11, an arc-shaped annular wall 371 is formed on the periphery of the supporting plate 37, an arc-shaped barrier strip 113 is arranged on the lower end face of the swing arm 11 along the radial outer side of rotation, and an embedding block 132 on the transmission plate 13 penetrates through the swing arm 11 and then protrudes out of the lower end face of the swing arm 11. As shown in fig. 6, as the swing arm 11 rotates along the rotation shaft 131, the stop strip 113 and the scarf joint block 132 abut against the inner side of the annular wall 371, and meanwhile, the swing arm 11 is supported by the supporting plate 37, and is matched with the mounting surface 320 and the avoidance groove 36, so that the stability of the moving track of the driving part 100 on the whole is ensured, and thus, the conductive reed 35 contacts with the guide rail 400 in a set shape, and the reliability of use is ensured. Further, the annular wall 371 is formed with a second protrusion 372 to limit the swing arm 11 after the swing arm 11 is rotated to the set position, and in this embodiment, the engagement piece 132 extending to the lower end surface of the swing arm 11 is interference-limited by the second protrusion 372 on the rotation locus thereof.

In one possible embodiment, the height of the abutment surface 121 of the catch 12 is less than the height of the portion of the slider 21 that is exposed to the track box 300. In the case that the bottom surface of the guide rail 400 is flat, when the track lamp is mounted to the guide rail 400, the exposed slider 21 is completely pressed in through the bottom surface of the guide rail 400 against the mounting surface 320, so that the stroke of the slider 21 is sufficiently large that the snap-in block 22 is out of the limit of the snap-in block 22. Thus, the swing arm 11 is unlocked and can rotate freely, the electricity taking head 310 is provided with the rotatable conductive reed 35, and the swing arm 11 rotates to enable the conductive reed 35 to contact the conductive metal strip in the guide rail 400, so that the rail lamp is electrified.

As shown in fig. 8, the track lamp according to the present invention is an embodiment in which the guide rail 400 is suspended from the ceiling, the track box 300 is disposed inside the U-shaped section 500 with the opening upward, the U-shaped section 500 can wrap the entire track, the strip-shaped notch is disposed outside the U-shaped section 500 for the handle 14 to extend and rotate, and the mounting surface 320 is exposed at the bottom of the U-shaped section 500. When the track lamp is installed, the bottom surface of the track extends into the U-shaped section bar 500 and presses the sliding block 21, so that the sliding block 21 is pressed in, and the retracted state is released.

Accordingly, the invention provides a method for installing a track lamp, which comprises the following steps: the track box 300 is installed to the guide rail 400 from bottom to top, the installation surface 320 of the track box 300 is abutted against the bottom surface of the guide rail 400, and the sliding block 21 is pressed to slide towards the inner side of the track box 300 so that the buckling block 22 moves to unlock the clamping hook part 12; the swing arm 11 is rotated to rotate the conductive reed 35 to extend out of the track box 300. Further, when the swing arm 11 is rotated to the set position, the conductive reed 35 is kept in contact with the guide rail 400, and the swing arm 11 is restrained to be kept at the set position.

The foregoing describes in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the invention by one of ordinary skill in the art without undue burden. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.

Claims (12)

1. The utility model provides a locking stop gear, includes and cooperates with track box (300) and is connected and operable drive division (100), drive division (100) are at least partly along track box (300) outside activity to and wear to establish in the lateral part of track box (300) and drive division (100) the locking part (200) that set up that corresponds, it includes stowage state and open state, is restrained the activity of drive division (100) by locking part (200) in stowage state, its characterized in that:

the driving part (100) comprises a swing arm (11), the swing arm (11) moves along an operation plane, and the free end of the swing arm (11) is provided with a clamping hook part (12) extending towards the inner side of the track box (300);

the locking part (200) can move relative to the operation plane in an operation mode, the locking part (200) comprises a sliding block (21) and a buckling block (22) which are fixedly connected, the sliding block (21) at least partially exposes out of the track box (300), a slot (31) is arranged on the outer side of the track box (300), and the outer side of the track box (300) is communicated with the locking part (200) through the slot (31);

in the retracted state, the clamping hook part (12) is clamped with the buckling block (22) through the slot (31), and in the opened state, the sliding block (21) vertically moves and enables the buckling block (22) to leave the clamping hook part (12).

2. The lock limiting mechanism according to claim 1, wherein the driving part (100) further comprises a driving plate (13), the driving plate (13) comprises a rotating shaft (131) movably connected with the track box (300), and the swing arm (11) and the driving plate (13) are fixedly connected and rotate along the axis of the rotating shaft (131).

3. A locking and limiting mechanism as claimed in claim 2, characterized in that the drive plate (13) is detachably connected to the swing arm (11), the drive plate (13) being formed with a snap-in block (132), the swing arm (11) comprising a mounting groove (111) adapted to the snap-in block (132).

4. A locking and limiting mechanism as claimed in claim 3, characterized in that the radial dimension of the engagement block (132) in the thickness direction thereof decreases, and the small end of the engagement block (132) faces the mounting groove (111), and the mounting groove (111) is provided with an anti-drop block (112) corresponding to the engagement block (132).

5. The lock limiting mechanism according to claim 2, wherein the transmission plate (13) is formed with a positioning block (133), a chute (32) adapted to move the positioning block (133) is formed on the inner side of the track box (300), and a first protrusion (33) interfering with the positioning block (133) is formed on the chute (32) at a position near the tip.

6. The locking and limiting mechanism according to claim 1, wherein in the locking part (200), two sliding blocks (21) are arranged on two sides of the buckling block (22) respectively, clamping grooves (23) are formed by matching with the buckling block (22), the clamping grooves (23) are suitable for the movable passing of the clamping hook parts (12), and a guide surface (221) is arranged on one side of the buckling block (22) facing the swing arm (11).

7. The lock-out limiting mechanism according to claim 1, wherein a resilient return mechanism (24) is provided between the lock-out portion (200) and the track box (300).

8. A locking and limiting mechanism as claimed in claim 1, characterized in that the free end of the swing arm (11) is further fixedly provided with a handle (14), the handle (14) extending outwards of the track box (300).

9. The locking and limiting mechanism of claim 1, wherein the snap-in block (22) has a minimum unlocking stroke, and the snap-in block (22) is movable a distance greater than the minimum unlocking stroke away from the catch portion (12) in the open state.

10. The lock limiting mechanism according to claim 1, wherein a support plate (37) is provided at the lower side of the swing arm (11), the support plate (37) is fixed outside the track box (300), an arc-shaped annular wall (371) is formed at the periphery of the support plate (37), and the inner side of the annular wall (371) and the upper end face of the support plate (37) limit the swing arm (11).

11. A track lamp comprising a locking and limiting mechanism as claimed in any one of claims 1-10, characterized in that the power pick-up head (310) of the track box (300) is mounted between the two side rails (400), a conductive reed (35) is arranged in the track box (300), an opening is arranged on the side surface of the track box (300) for the conductive reed (35) to extend out to contact the rails (400), the track box (300) comprises a mounting surface (320), the slider (21) penetrates and exposes the mounting surface (320), and the mounting surface (320) is abutted against the bottom surface of the rails (400) when mounted.

12. The track lamp as claimed in claim 11, wherein the hook portion (12) includes an abutment surface (121) for mating engagement with the snap-on block (22), and the abutment surface (121) has a height smaller than a height of the slider (21) to expose the mounting surface (320).