Push-pull type unlocking structure of terminal block

Abstract

The invention discloses a terminal block push-pull type unlocking structure, which is characterized in that a clamping hook body capable of moving along a direction perpendicular to the side surface is arranged on the surface of one side of a plugging body, and when the plugging body is plugged with a fixed end of a terminal block, the clamping hook body and a clamping point on the clamping hook body can be inserted into a clamping groove in the fixed end of the terminal block; an elastic structure is arranged between the plugging body and the clamping hook body and provides elastic force for the clamping hook body in the moving direction of the clamping hook body so that the clamping points on the clamping hook body can be connected with the buckles on the side walls of the clamping grooves in a buckled mode, and the push-pull rod installed on the surface of one side of the plugging body can slide by a set distance in a reciprocating mode along the surface of one side of the plugging body. The second extrusion inclined plane on the push-pull rod extrudes the first extrusion inclined plane on the clamping hook body along with the sliding of the push-pull rod to force the clamping hook body to move, so that the clamping point and the buckle are released, the clamping point can be released and unlocked in a narrow space, the operation is convenient and labor-saving, and the flexible design of the terminal block is facilitated.

Description

Technical Field

[0001] The present invention relates to a terminal block, in particular to a push-pull type unlocking structure of the terminal block. Background Art

[0002] After the plug-in end and the fixed end of the pluggable terminal block are plugged in, the elastic hook body on the plug-in end of the terminal block is inserted into the slot of the fixed end of the terminal block. At the same time, the card point on the hook body is engaged with the buckle on the side wall of the slot to connect and position, thereby realizing the stop positioning of the plug-in end and the fixed end of the terminal block, preventing the plug-in end from being accidentally pulled out due to external force or loosening due to vibration.

[0003] Currently, the hook body at the plug-in end of the terminal block adopts a cantilever structure to achieve elastic swing. When unlocking, it is necessary to press the hook body to unlock.

[0004] Due to limitations such as plastic molding, the hook structure of some terminal blocks can only grow on the side of the terminal block plug-in end facing the PCB board, which is easy to interfere with the PCB board, cannot be used in many occasions, and is also inconvenient to operate. Summary of the invention

[0005] In order to overcome the above-mentioned defects, the present invention provides a push-pull unlocking structure for a terminal block, which can realize card point release and unlocking in a small space, can be used for various types of terminal blocks, and the unlocking operation is convenient and labor-saving.

[0006] The technical solution adopted by the present invention to solve its technical problems is as follows: a push-pull unlocking structure for a terminal block, comprising a plug-in body and a push-pull rod, a surface of one side of the plug-in body is provided with a hook body that can move in a direction perpendicular to the side surface of the plug-in body, a card point is provided on the hook body, when the plug-in body is plugged into the fixed end of the terminal block, the hook body and the card point thereon can be inserted into the card slot of the fixed end of the terminal block, an elastic structure is also provided between the plug-in body and the hook body, the elastic structure provides the hook body with an elastic force along its movement direction so that the card point on the hook body is buckled with the card buckle on the side wall of the card slot The push-pull rod is connected, the push-pull rod is installed on the surface of one side of the plug-in body, and the push-pull rod can slide back and forth along the surface of one side of the plug-in body for a set distance, the hook body is also provided with a first extrusion inclined surface that has an angle with its movement direction and the movement direction of the push-pull rod, the push-pull rod is provided with a second extrusion inclined surface parallel to the first extrusion inclined surface, the second extrusion inclined surface is tightly fitted together with the first extrusion inclined surface, and pushing and pulling the push-pull rod can make the second extrusion inclined surface squeeze the first extrusion inclined surface, thereby forcing the hook body to overcome the elastic force of the elastic structure and move in the opposite direction, so that the card point on the hook body is disengaged from the buckle on the fixed end of the terminal block.

[0007] As a further improvement of the present invention, the hook body is a cantilever structure integrally formed on the surface of one side of the plug-in body, and the cantilever structure can elastically swing to a set angle along a direction perpendicular to the surface of one side of the plug-in body. The hook point is arranged on the side wall of the free end of the cantilever structure, and an elastic structure is formed at the root of the cantilever structure.

[0008] As a further improvement of the present invention, the clamping point is a barb structure protruding from the free end surface of the cantilever structure, the buckle on the inner side wall of the slot on the fixed end of the terminal block is a boss, and the clamping point of the barb structure can hook the side wall of the boss.

[0009] As a further improvement of the present invention, a push-pull slide is provided on one side surface of the plug-in body, the push-pull rod is inserted in the push-pull slide, the push-pull rod can slide along the push-pull slide a set distance, and an extrusion protrusion parallel to the one side surface of the plug-in body is formed on the side wall of one end of the push-pull rod, the extrusion protrusion covers the surface of the hook body, and the second extrusion slope is provided on the surface of the extrusion protrusion facing the hook body.

[0010] As a further improvement of the present invention, a raised pressure bump is provided on the hook body, the first extrusion slope is provided on the surface of the pressure bump, the side wall of the pressure bump at one end where the height of the first extrusion slope is high is transitionally connected with the surface of one side of the hook body through a stop slope, and the extrusion bump on the push-pull rod can stop on the surface of the stop slope after passing over the pressure bump through the first extrusion slope.

[0011] As a further improvement of the present invention, one side surface of the hook body is an inclined surface that makes the height of the free end of the cantilever structure lower than the root height, and the inclined surface is connected to the stop inclined surface through an arc-shaped concave surface. An end face of the extrusion protrusion on the side wall of one end of the push-pull rod and the second extrusion inclined surface together form a pointed protrusion structure, and a convex arc surface is provided at the end of the pointed protrusion structure. The pointed protrusion structure and the convex arc surface at its end can be accommodated in a V-shaped groove structure with an arc-shaped concave bottom formed between one side surface of the hook body and the stop inclined surface.

[0012] As a further improvement of the present invention, two hook bodies are provided in parallel and spaced apart on one side surface of the plug-in body, and a U-shaped channel for the push-pull rod to slide is formed between the two hook bodies. A pair of L-shaped stop blocks are also provided on one side surface of the plug-in body, and one side wall of the L-shaped stop block stops on the side surface of the push-pull rod in the U-shaped channel facing the U-shaped opening. A sliding distance of the push-pull rod is limited by the relative sliding connection between the one side surface of the plug-in body and the push-pull rod through a long strip slot and a convex column structure.

[0013] As a further improvement of the present invention, a handle fixing rib protruding toward one side surface of the plug-in body is provided on one end of the push-pull rod, and a notch-shaped fixing rib slide groove is formed at one end of the one side surface of the plug-in body. The handle fixing rib at one end of the push-pull rod can be slidably inserted in the fixing rib slide groove, and the handle fixing rib is stopped on the bottom surface of the fixing rib slide groove along its sliding direction. A handle anti-detachment groove is also provided on the side wall of the push-pull rod facing the one side surface of the plug-in body, and an inverted protrusion with one end being a straight surface and the other end being an inclined surface is provided on one side surface of the plug-in body. The inverted protrusion can be slidably inserted in the handle anti-detachment groove on the push-pull rod, and the flat surface of the inverted protrusion is stopped on the inner side surface of one end of the handle anti-detachment groove along its sliding direction.

[0014] As a further improvement of the present invention, one end of the push-pull rod is also provided with a pull handle or a push-press protrusion, and the pull handle and the push-press protrusion can both extend a set distance outside one end of the plug-in body, and the push-press protrusion is formed with a pressing slope for fingers to press and slide toward the outside of one end of the plug-in body.

[0015] As a further improvement of the present invention, a handle reset guide rib is also provided on the surface of one side of the plug-in body, and a reset inclined surface inclined along the sliding direction of the push-pull rod is provided on the handle reset guide rib, and an elastic reset arm with a cantilever structure is provided on the push-pull rod, and a guide slide column is provided on the elastic reset arm. The guide slide column can slide along the reset inclined surface on the handle reset guide rib, and when the push-pull rod slides in the direction of disengaging the card point and the buckle, the guide slide column slides along the reset inclined surface to elastically deform the elastic reset arm.

[0016] The beneficial effects of the present invention are as follows: the present invention drives the hook body to move by sliding the push-pull rod parallel to the surface of the plug-in end of the terminal block, thereby realizing unlocking the plug-in end and the fixed end of the terminal block. This structure can realize the card point release and unlocking function in a narrow space. The present invention also designs a card stop structure on the card hook body to fix the card point position, and decomposes the card point release and plug-in and pull-out steps for easy operation. The sliding mode of the push-pull rod of the present application can adopt a pull-out structure or a pressing structure, which is more labor-saving than the traditional unlocking operation form. The present application structure can place the hook structure on any side of the product according to the different usage requirements of each user, which is convenient for the flexible design of the terminal block. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a front view of a first push-pull rod of the present invention;

[0018] Figure 2 It is a left view of the first push-pull rod of the present invention;

[0019] Figure 3 A top view of a first push-pull rod of the present invention;

[0020] Figure 4 It is a rear view of the first push-pull rod of the present invention;

[0021] Figure 5 for Figure 4 Middle AA section view;

[0022] Figure 6 This is a front view of the first plug-in body of the present invention;

[0023] Figure 7 for Figure 6 Middle BB section view;

[0024] Figure 8 A top view of a first plug-in body of the present invention;

[0025] Fig. 9 It is a right side view of the first plug-in body of the present invention;

[0026] Fig.10 This is a front view of the first assembly structure of the present invention;

[0027] Fig.11 A top view of a first assembly structure of the present invention;

[0028] Fig.12 for Fig.11 Middle CC section view;

[0029] Fig.13 for Fig.11 Middle DD section view;

[0030] Fig.14 It is a right view of the first assembly structure of the present invention;

[0031] Fig.15 This is a front view of the first structure of the present invention in a plug-in state with the fixed end of the terminal block;

[0032] Fig.16 for Fig.15 Middle EE section view;

[0033] Fig.17 The unlocking state diagram of the first structure of the present invention;

[0034] Fig.18 This is a front view of a second push-pull rod of the present invention;

[0035] Fig.19 It is a right side view of the second push-pull rod of the present invention;

[0036] Fig. 20 A top view of a second push-pull rod of the present invention;

[0037] Fig.21It is a rear view of the second push-pull rod of the present invention;

[0038] Fig. 22 for Fig.21 Middle FF section view;

[0039] Fig.23 for Fig.21 Middle GG section view;

[0040] Fig.24 This is a front view of the second plug-in body of the present invention;

[0041] Fig.25 for Fig.24 Middle HH section view;

[0042] Fig.26 A top view of a second plug-in body of the present invention;

[0043] Fig. 27 It is a right side view of the second plug-in body of the present invention;

[0044] Fig.28 This is a front view of a second assembly structure of the present invention;

[0045] Fig.29 A top view of a second assembly structure of the present invention;

[0046] Fig.30 for Fig.29 Middle II section view;

[0047] Fig.31 It is a right view of the second assembly structure of the present invention;

[0048] Fig.32 This is a front view of the second structure of the present invention in a locked state;

[0049] Fig.33 It is a right view of the second structure of the present invention in a locked state;

[0050] Fig.34 This is a front view of the unlocked state of the second structure of the present invention;

[0051] Fig.35 This is a right view of the second structure of the present invention in the unlocked state. DETAILED DESCRIPTION

[0052] Embodiment: A push-pull unlocking structure for a terminal block, comprising a plug-in body 1 and a push-pull rod 2, wherein a hook body 3 capable of moving in a direction perpendicular to the side surface of the plug-in body 1 is provided on one side surface of the plug-in body 1, and a clamping point 31 is provided on the hook body 3. When the plug-in body 1 is plugged into the fixed end 4 of the terminal block, the hook body 3 and the clamping point 31 thereon can be inserted into the clamping slot 41 of the fixed end 4 of the terminal block. An elastic structure is further provided between the plug-in body 1 and the hook body 3, and the elastic structure provides the hook body 3 with an elastic force along its movement direction so that the clamping point 31 on the hook body 3 is buckled and connected with the clamping point 42 on the side wall of the clamping slot 41. The push-pull rod 2 is installed on the plug-in body 1. On the surface of one side of the pull-out body 1, and the push-pull rod 2 can slide back and forth along the surface of one side of the plug-in body 1 for a set distance, the hook body 3 is also provided with a first extrusion slope 321 that has an angle with its movement direction and the movement direction of the push-pull rod 2, and the push-pull rod 2 is provided with a second extrusion slope 211 parallel to the first extrusion slope 321, and the second extrusion slope 211 is tightly fitted together with the first extrusion slope 321. Pushing and pulling the push-pull rod 2 can make the second extrusion slope 211 squeeze the first extrusion slope 321, thereby forcing the hook body 3 to overcome the elastic force of the elastic structure and move in the opposite direction, so that the card point 31 on the hook body 3 is disengaged from the buckle 42 on the fixed end 4 of the terminal block.

[0053] When the plug-in end 4 of the terminal block is plugged into the fixed end 4, the hook body 3 on the plug-in body 1 is also inserted into the slot 41 of the fixed end 4 of the terminal block. When the plug-in end and the fixed end 4 are plugged in place, the card point 31 on the hook body 3 is just engaged with the buckle 42 on the side wall of the slot 41, and the card point 31 and the buckle 42 remain in the engaged connection state under the elastic force of the elastic structure. When the plug-in end needs to be pulled out from the fixed end 4, the push-pull rod 2 is slid first, and the second extrusion inclined surface 211 on the push-pull rod 2 will squeeze the first extrusion inclined surface 321 on the hook body 3, thereby forcing the hook body 3 to move. When the push-pull rod 2 slides into place, the hook body 3 moves to the position where the card point 31 and the buckle 42 are disengaged. At this time, the plug-in end can be pulled outward. The above structure can be set on any side wall of the terminal block. When in use, there is no need to press the hook body 3 hard. Only the sliding push-pull rod 2 needs to be pushed and pulled. It can be suitable for narrow spaces, easy to operate, and effortless.

[0054] The hook body 3 is a cantilever structure integrally formed on the surface of one side of the plug-in body 1. The cantilever structure can be elastically swung to a set angle along a direction perpendicular to the surface of one side of the plug-in body 1. The clamping point 31 is provided on the side wall of the free end of the cantilever structure, and an elastic structure is formed at the root of the cantilever structure. The hook body 3 adopts a cantilever structure, and drives the clamping point 31 to move by swinging up and down, and realizes its elastic reset through the elastic force at its root. The structure is simple and can be integrally formed on the surface of the plug-in body 1. In addition, the hook body 3 can also be assembled on the surface of the plug-in body 1 by sliding installation, and an elastic reset force is provided to it by a spring. This is an equivalent replacement structure that can be easily thought of by a person skilled in the art based on this application, and it belongs to the protection scope of this patent.

[0055] The clamping point 31 is a barb structure protruding from the free end surface of the cantilever structure, and the buckle 42 on the inner side wall of the clamping groove 41 on the fixed end 4 of the terminal block is a boss, and the clamping point 31 of the barb structure can hook the side wall of the boss. The barb structure is hooked on the boss to achieve a stable buckle connection, and the structure is simple. In addition, the barb can also be hooked with the groove or the convex point can be plugged into the pit, etc. This is an equivalent replacement structure that can be easily thought of by those skilled in the art based on this application and falls within the scope of protection of this patent.

[0056] A push-pull slide is provided on one side surface of the plug-in body 1, and the push-pull rod 2 is inserted in the push-pull slide. The push-pull rod 2 can slide along the push-pull slide for a set distance, and an extrusion protrusion 21 parallel to the one side surface of the plug-in body 1 is formed on the side wall of one end of the push-pull rod 2. The extrusion protrusion 21 covers the surface of the hook body 3, and the second extrusion slope 211 is provided on the surface of the extrusion protrusion 21 facing the hook body 3.

[0057] The hook body 3 is provided with a raised pressure-bearing protrusion 32, the first extrusion slope 321 is provided on the surface of the pressure-bearing protrusion 32, the side wall of the pressure-bearing protrusion 32 located at the end with a higher height than the first extrusion slope 321 is transitionally connected with the surface of one side of the hook body 3 through a stop slope 322, and the extrusion protrusion 21 on the push-pull rod 2 can be stopped on the surface of the stop slope 322 after passing over the pressure-bearing protrusion 32 via the first extrusion slope 321. When the extrusion protrusion 21 on the push-pull rod 2 passes over the pressure-bearing protrusion 32, the extrusion protrusion 21 will be blocked by the stop slope 322, so that it remains in the unlocked position, which is convenient for pulling out the plug-in end. When the plug-in end is inserted into the fixed end 4 again, the push-pull rod 2 is pushed, and the extrusion protrusion 21 on the push-pull rod 2 can move in the opposite direction along the stop slope 322 to return to the locked state. This structure can decompose the steps of releasing the card point 31 and plugging and unplugging, which is convenient for operation.

[0058] The surface of one side of the hook body 3 is an inclined surface that makes the height of the free end of the cantilever structure lower than the height of the root. The inclined surface is connected to the stop inclined surface 322 through an arc-shaped concave surface. The end surface of the extrusion protrusion 21 on the side wall of one end of the push-pull rod 2 and the second extrusion inclined surface 211 together form a pointed protrusion structure. The end of the pointed protrusion structure is provided with a convex arc surface. The pointed protrusion structure and the convex arc surface at its end can be accommodated in the V-shaped groove structure with an arc-shaped concave bottom formed between the surface of one side of the hook body 3 and the stop inclined surface 322.

[0059] Two hook bodies 3 are arranged in parallel and at intervals on one side surface of the plug body 1, and a U-shaped channel for the push-pull rod 2 to slide is formed between the two hook bodies 3. A pair of L-shaped stop blocks 11 are also arranged on one side surface of the plug body 1, and a side wall of the L-shaped stop block 11 stops on the side surface of the push-pull rod 2 in the U-shaped channel facing the U-shaped opening. The sliding distance of the push-pull rod 2 is limited by the relative sliding connection of the long strip slot and the convex column structure between the one side surface of the plug body 1 and the push-pull rod 2. The U-shaped channel is formed by the two hook bodies 3, and the push-pull rod 2 is blocked by the two L-shaped stop blocks 11, thereby realizing the sliding installation of the push-pull rod 2 on the plug body 1.

[0060] A handle fixing rib 22 is provided on one end of the push-pull rod 2, which protrudes toward one side surface of the plug-in body 1. A notch-shaped fixing rib groove 12 is formed at one end of the one side surface of the plug-in body 1. The handle fixing rib 22 at one end of the push-pull rod 2 can be slidably inserted in the fixing rib groove, and the handle fixing rib 22 is stopped on the bottom surface of the fixing rib groove along its sliding direction. A handle anti-detachment groove 23 is also provided on the side wall of the push-pull rod 2 facing the one side surface of the plug-in body 1. An inverted protrusion 13 with one end being a straight surface and the other end being an inclined surface is provided on one side surface of the plug-in body 1. The inverted protrusion 13 can be slidably inserted in the handle anti-detachment groove 23 on the push-pull rod 2, and the flat surface of the inverted protrusion is stopped on the inner side surface of one end of the handle anti-detachment groove 23 along its sliding direction. When the handle fixing rib 22 slides in the notch-shaped fixing rib slide groove 12, the bottom surface of the notch-shaped fixing rib slide groove 12 blocks the handle fixing rib 22, and the inverted protrusion 13 on the plug-in body 1 slides in the handle anti-slip groove 23 of the push-pull rod 2. At the same time, the side wall of the handle anti-slip groove 23 blocks the direct surface of the inverted protrusion 13, thereby limiting the sliding distance of the push-pull rod 2 on the plug-in body 1 and preventing the push-pull rod 2 from separating from the plug-in body 1. The above structure facilitates the assembly of the push-pull rod 2. A handle anti-slip point 3127 with a cantilever structure can also be provided on the hand of the push-pull rod 2. Correspondingly, a handle anti-slip groove 15 is provided on one side surface of the plug-in body 1. When the push-pull rod 2 is assembled, the handle anti-slip point 31 thereon is inserted into the handle anti-slip groove on the one side surface of the plug-in body 1 to prevent the push-pull rod 2 from falling off.

[0061] The push-pull rod 2 is also provided with a pull handle 24 or a push-pull bump 25 at one end, and both the pull handle and the push-pull bump can extend outward of one end of the plug-in body 1 by a set distance, and the push-pull bump is formed with a pressing slope 251 for pressing by a finger to slide toward the outside of one end of the plug-in body 1. The push-pull rod 2 can be pulled out and pulled at the side of the plug-in body 1 by the pull handle, or the push-pull rod 2 can be forced to slide by pressing the pressing slope 251 on the surface of the push-pull bump, and the two schemes can be selected according to the use position and operation space of the terminal block.

[0062] A handle reset guide rib 14 is also provided on one side of the plug-in body 1. The handle reset guide rib 14 is provided with a reset slope 141 inclined along the sliding direction of the push-pull rod 2. The push-pull rod 2 is provided with an elastic reset arm 26 of a cantilever structure. The elastic reset arm 26 is provided with a guide slide 261. The guide slide 261 can slide along the reset slope 141 on the handle reset guide rib 14. When the push-pull rod 2 slides in the direction of disengaging the clamping point 31 from the buckle 42, the guide slide 261 slides along the reset slope 141 to elastically deform the elastic reset arm 26. The elastic reset arm 26 provides a reset elastic force to the guide slide 261, so that the push-pull rod 2 can automatically reset to the locked state when in use, so as to avoid forgetting to lock the plug-in end of the terminal block after being inserted into the fixed end 4.

Claims

1. A push-pull unlocking structure for a terminal block, characterized in that: The plug-in body (1) and the push-pull rod (2) are provided with a hook body (3) on one side of the plug-in body that can move in a direction perpendicular to the side surface of the plug-in body, and a clamping point (31) is provided on the hook body. When the plug-in body is plugged into the fixed end (4) of the terminal block, the hook body and the clamping point thereon can be inserted into a clamping groove (41) at the fixed end of the terminal block. An elastic structure is also provided between the plug-in body and the hook body. The elastic structure provides the hook body with an elastic force along its movement direction so that the clamping point on the hook body is buckled and connected with the clamp (42) on the side wall of the clamping groove. The push-pull rod is installed On the surface of one side of the plug-in body, and the push-pull rod can slide back and forth along the surface of one side of the plug-in body for a set distance, the hook body is also provided with a first extrusion slope (321) that has an angle with its movement direction and the movement direction of the push-pull rod, and the push-pull rod is provided with a second extrusion slope (211) parallel to the first extrusion slope, the second extrusion slope is tightly fitted with the first extrusion slope, and pushing and pulling the push-pull rod can make the second extrusion slope squeeze the first extrusion slope, thereby forcing the hook body to overcome the elastic force of the elastic structure and move in the opposite direction, so that the clamping point on the hook body is disengaged from the buckle on the fixed end of the terminal block.

2. The push-pull unlocking structure of the terminal block according to claim 1, characterized in that: The hook body is a cantilever structure integrally formed on one side surface of the plug body. The cantilever structure can elastically swing to a set angle along a direction perpendicular to the side surface of the plug body. The hook point is set on the side wall of the free end of the cantilever structure, and an elastic structure is formed at the root of the cantilever structure.

3. The push-pull unlocking structure of the terminal block according to claim 2, characterized in that: The clamping point is a barb structure protruding from the free end surface of the cantilever structure, the buckle on the inner side wall of the clamping groove on the fixed end of the terminal block is a boss, and the clamping point of the barb structure can hook the side wall of the boss.

4. The terminal block push-pull unlocking structure according to claim 1 or 2, characterized in that: A push-pull slide is provided on one side surface of the plug-in body, the push-pull rod is inserted in the push-pull slide, and the push-pull rod can slide along the push-pull slide for a set distance. An extrusion protrusion (21) parallel to the one side surface of the plug-in body is formed on the side wall of one end of the push-pull rod, the extrusion protrusion covers the surface of the hook body, and a second extrusion slope is provided on the surface of the extrusion protrusion facing the hook body.

5. The push-pull unlocking structure of the terminal block according to claim 4, characterized in that: The hook body is provided with a raised pressure-bearing lug (32), the first extrusion slope is provided on the surface of the pressure-bearing lug, the side wall of the pressure-bearing lug located at the end with a higher height of the first extrusion slope is transitionally connected with a side surface of the hook body through a stop slope (322), and the extrusion lug on the push-pull rod can be stopped on the surface of the stop slope after passing over the pressure-bearing lug via the first extrusion slope.

6. The push-pull unlocking structure of the terminal block according to claim 5, characterized in that: The surface of one side of the hook body is an inclined surface that makes the height of the free end of the cantilever structure lower than the height of the root. The inclined surface is connected to the stop inclined surface through an arc-shaped concave surface. The one end surface of the extrusion protrusion on the side wall of one end of the push-pull rod and the second extrusion inclined surface together form a pointed protrusion structure. The end of the pointed protrusion structure is provided with a convex arc surface. The pointed protrusion structure and the convex arc surface at its end can be accommodated in a V-shaped groove structure with an arc-shaped concave bottom formed between the surface of one side of the hook body and the stop inclined surface.

7. The push-pull unlocking structure of the terminal block according to claim 4, characterized in that: Two hook bodies are arranged in parallel and at intervals on one side surface of the plug-in body, and a U-shaped channel for the push-pull rod to slide is formed between the two hook bodies. A pair of L-shaped stop blocks (11) are also arranged on one side surface of the plug-in body, and a side wall of the L-shaped stop block stops on a side surface of the push-pull rod in the U-shaped channel facing the U-shaped opening. A long strip slot and a convex column structure are relatively slidably connected between the one side surface of the plug-in body and the push-pull rod to form a limit on the sliding distance of the push-pull rod.

8. The terminal block push-pull unlocking structure according to claim 7, characterized in that: A handle fixing rib (22) is provided on one end of the push-pull rod and protrudes toward one side surface of the plug-in body. A notch-shaped fixing rib sliding groove (12) is formed at one end of the one side surface of the plug-in body. The handle fixing rib at one end of the push-pull rod can be slidably inserted into the fixing rib sliding groove, and the handle fixing rib is stopped on the bottom surface of the fixing rib sliding groove along its sliding direction. A handle anti-slip groove (23) is also provided on the side wall of the push-pull rod facing the one side surface of the plug-in body. An inverted protrusion (13) with one end being a straight surface and the other end being an inclined surface is provided on one side surface of the plug-in body. The inverted protrusion can be slidably inserted into the handle anti-slip groove on the push-pull rod, and the flat surface of the inverted protrusion is stopped on the inner side surface of one end of the handle anti-slip groove along its sliding direction.

9. The terminal block push-pull unlocking structure according to claim 1, characterized in that: One end of the push-pull rod is also provided with a pull handle (24) or a push-press bump (25), and both the pull handle and the push-press bump can extend outward of one end of the plug-in body by a set distance, and the push-press bump is formed with a pressing slope (251) for pressing by a finger to slide toward the outside of one end of the plug-in body.

10. The push-pull unlocking structure of the terminal block according to claim 9, characterized in that: A handle reset guide rib (14) is also provided on one side surface of the plug-in body, and a reset inclined surface (141) inclined along the sliding direction of the push-pull rod is provided on the handle reset guide rib. An elastic reset arm (26) of a cantilever structure is provided on the push-pull rod, and a guide slide column (261) is provided on the elastic reset arm. The guide slide column can slide along the reset inclined surface on the handle reset guide rib. When the push-pull rod slides in a direction to disengage the card point from the card buckle, the guide slide column slides along the reset inclined surface to elastically deform the elastic reset arm.

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