CN214477960U - Wiring terminal - Google Patents

Abstract

The utility model provides a connecting terminal, which comprises a plastic shell main body and a contact frame; the contact frame is provided with a clamping joint for inserting the lead, the clamping joint is formed by a pair of elastic pieces, the free ends of the two elastic pieces are constructed into an inner bending structure and are symmetrically arranged in the contact frame, and the lead can be elastically clamped after entering the wire passing channel along the wire inserting hole formed in the main body through elastic matching; the clamping device comprises a main body and a clamping joint, wherein the clamping joint is arranged on the main body, and the clamping joint is used for clamping the inner bending structure; the jacking structure is arranged on a movable path of the inner bending structure and is matched with the inner bending structure in an initial state in a spaced mode, so that the inner bending structure can be abutted against the wire after the wire is inserted and moves to a limit position. The connecting terminal is ensured to normally work in the movement range allowed by the inward bending structure.

Description

Wiring terminal

Technical Field

The utility model relates to a connecting terminal technical field particularly, relates to a binding post.

Background

In the conventional connection terminal, the conductive terminal is generally formed by bending a metal sheet, and when the conductive terminal is connected with the external plug in a matching manner, the conductive terminal is elastically deformed, so that the conductive terminal is ensured to be stably contacted with the butting element mainly through the deformation elasticity of the conductive terminal.

In practical applications, if such terminals are in a limited elastic state for a long time, the elastic performance of the conductive terminals is long along with the service time, and the conductive terminals have insufficient elasticity or even elastic failure, so that the contact effect is poor, and great inconvenience is brought to users. In addition, because the terminal is formed by bending the metal sheet, the metal has certain elastic fatigue and certain maximum elastic deformation. When the deformation exceeds the maximum elastic deformation, the terminal will be elastically fatigued, and the terminal will fail to provide elasticity and fail, thereby causing abnormal electrical connection.

Particularly, in the case of miniaturization, in order to make the connection terminal have a sufficiently small specification size, the conventional conductive terminal is more prone to have the problems that elastic stress is loosened, elastic bending deformation occurs, and stress is excessively concentrated at a position, so that plastic deformation occurs, and the resilience force is weakened, so that the contact force is reduced or the contact is broken, and the problem of unreliable electrical connection often occurs.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a binding post aims at improving the problem that the elasticity contact that current terminal provided easily became invalid and was difficult to maintain elasticity and buckle.

The utility model adopts the following scheme:

the application provides a wiring terminal, which comprises a plastic shell main body and at least one contact frame which is arranged in the main body and used for clamping a wire; the contact frame is provided with a clamping joint for inserting the lead, the clamping joint is formed by a pair of elastic pieces, the free ends of the two elastic pieces are constructed into an inner bending structure and are symmetrically arranged in the contact frame, and the lead can be elastically clamped after entering the wire passing channel along the wire inserting hole formed in the main body through elastic matching; the clamping device comprises a main body and a clamping joint, wherein the clamping joint further comprises a jacking structure arranged on one side of the main body, and the jacking structure is used for limiting the continuous stretching movement of the inner bending structure and preventing the clamping failure of the clamping joint; the jacking structure is arranged on a movable path of the inner bending structure and is matched with the inner bending structure in an initial state in a spaced mode, so that the inner bending structure can be abutted against the wire after the wire is inserted and moves to a limit position.

As a further improvement, a space allowing the lead to be plugged and unplugged exists between the two end parts of the free end of the elastic part, and the two inner bending structures face the direction of the wire inserting hole and are positioned in the area where the wire passing channel is located to form a wire inserting space which is approximately shaped like an outer Chinese character 'ba', so that the lead can continuously enter the wire passing channel along the inserting direction.

As a further improvement, the limit position of the internal bending structure is approximately the activity threshold value of the elastic part of the internal bending structure, which prevents the elastic part from being flexibly bent; wherein, the distance in the initial state is 0-0.6mm, and the opening value of the plug wire space is 30-60 degrees; and the jacking structure can limit the inner bending structure to the limit position, so that the floating value of the spacing ranges from 0.1mm to 0.3mm, and the fluctuation range of the opening value ranges from 5 degrees to 24 degrees.

As a further improvement, the tightening structure comprises a clamping convex piece arranged on the inner wall of the main body; the convex clamping piece and the inner bending structure of the contact frame are arranged in an avoiding mode and are arranged on the opening moving path of the inner bending structure.

As a further improvement, the main body at least comprises an upper shell wall and a lower shell wall which are mutually spaced and opposite, and a side shell wall which is adjacently and closely surrounded and formed at the outer peripheries of the upper shell wall and the lower shell wall; the contact frame can be assembled in the main body from bottom to top relative to the main body and partially or completely block the bottom surface of the main body; the lower shell wall is provided with a sinking surface, the sinking surface forms a part or whole of an inner space for accommodating the contact frame in a mode of sinking towards the inner part of the upper shell wall, and at least part of the sinking surface can be overlapped with the upper shell wall.

As a further improvement, the sinking surface is arranged along the vertical alignment recess, and at least part of the sinking surface can form a step surface at the upper housing wall, and the step surface is higher than the sinking surface superposed at the upper housing wall; and the clamping convex piece is integrally formed on the step surface.

As a further improvement, the protruding part extends to contact with the contact frame along the length direction, so as to limit the contact frame in the internal space, and the contact frame and the step surface are arranged at intervals.

As a further improvement, the distance between the convex clamping piece and the internal bending structure in the initial state is 0.15mm-0.3 mm.

By adopting the technical scheme, the utility model discloses can gain following technological effect:

the utility model provides a binding post, the clamp joint through the contact frame carries out centre gripping, fixed to the wire. The clamping joint is composed of a pair of elastic pieces, the free ends of the elastic pieces are constructed into inner bending structures, and the two inner bending structures symmetrically arranged on the contact frame can enable the wire to be tightly matched on the contact frame in an elastic mode. More importantly, in order to avoid the clamping elasticity of the inner bending structure from being elastically exhausted and losing efficacy, the inner bending structure is limited to be continuously opened through the jacking structure arranged on the main body or the contact frame, and the clamping failure of the clamping joint can be prevented. The utility model discloses a bending structure, including bending structure, top tight structure, limit structure, and elastic fatigue phenomenon, bending structure is buckled to surpassing extreme position, and can effectively classify the wire specification of suitable centre gripping, in order to ensure that connecting terminal normally works in the range of motion that bending structure allows including all the time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a connection terminal according to an embodiment of the present invention, wherein a lower drawing is a disassembled schematic illustration of an upper drawing;

FIG. 2 is a schematic view of the contact frame of FIG. 1;

FIG. 3 is a schematic view of the structure of FIG. 2 from another perspective;

FIG. 4 is a schematic view of the structure of FIG. 2 from another perspective;

fig. 5 is a sectional view of a terminal according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a connection terminal according to an embodiment of the present invention at other viewing angles, wherein the lower diagram is an exploded schematic diagram of the upper diagram;

FIG. 7 is a schematic structural view of the plastic housing body in FIG. 6;

fig. 8 is a schematic structural view of a connection terminal according to another embodiment of the present invention, wherein the lower drawing is a disassembled view of the upper drawing;

fig. 9 is a sectional view of a terminal according to another embodiment of the present invention;

FIG. 10 is a schematic view of the contact frame of FIG. 8;

fig. 11 is a schematic view of the structure of fig. 10 from another perspective.

Icon: 1-a body; 11-upper housing wall; 111-step face; 12-lower housing wall; 121-sinking surface; 13-side casing wall; 14-a wire insertion hole; 18-a snap member;

2-a contact frame; 21-a clamping joint; 211-a spring; 22-support base; 23-mounting the side part; 24-a solder tail structure; 25-abutment.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Examples

With reference to fig. 1 to 11, the present embodiment provides a connection terminal, which includes a plastic housing body 1 and at least one contact frame 2 disposed in the body 1 for clamping a wire. The contact frame 2 is provided with a clamping joint 21 for inserting the lead, the clamping joint 21 is formed by a pair of elastic pieces 211, the free ends of the two elastic pieces 211 are constructed into an inner bending structure and are symmetrically arranged in the contact frame 2, and the lead can be elastically clamped after entering the wire passing channel along the wire inserting hole 14 formed in the main body 1 through elastic matching. The clamping structure is arranged on any one of the main body 1 and the contact frame 2, and is used for limiting the continuous stretching movement of the inner bending structure and preventing the clamping failure of the clamping joint 21. The jacking structure is arranged on a movable path of the inner bending structure and is matched with the inner bending structure in an initial state in a spaced mode, so that the inner bending structure can be abutted against the wire after the wire is inserted and moves to a limit position.

In this embodiment, the lead is clamped and fixed by the clamp tab 21 of the contact frame 2. The clamping connector 21 is composed of a pair of elastic members 211, the free ends of the elastic members 211 are configured as inner bending structures, and the two inner bending structures symmetrically arranged on the contact frame 2 can elastically and tightly fit the wires on the contact frame 2.

More importantly, in order to avoid the clamping elasticity of the inner bending structure from being elastically exhausted and losing efficacy, the inner bending structure is limited to be continuously opened through the jacking structure arranged on the main body 1 or the contact frame 2, and the clamping failure of the clamping joint 21 can be prevented. The utility model discloses a bending structure, including bending structure, top tight structure, limit structure, and elastic fatigue phenomenon, bending structure is buckled to surpassing extreme position, and can effectively classify the wire specification of suitable centre gripping, in order to ensure that connecting terminal normally works in the range of motion that bending structure allows including all the time.

Referring to fig. 1 and 3, in an embodiment, the elastic member 211 has a space between two end portions of the free end for allowing the wire to be inserted and pulled, and the two inner bending structures face the wire insertion hole 14 and are located in the area where the wire passing channel is located to form a wire insertion space in a substantially outward splayed shape, so as to facilitate the wire to continuously enter the wire passing channel along the insertion direction. Therefore, the two inner bending structures symmetrically arranged on the contact frame 2 form a wire inserting space which is approximately in a shape of an outer Chinese character 'ba', a space for allowing a wire to be inserted and pulled exists between the two end parts of the free end, so that an external wire can conveniently enter along the wire inserting hole 14 through the wire inserting space in a guiding manner, and then the external wire is inserted into and inserted into the space between the two end parts and clamped in the inner bending structure of the elastic piece 211, and the wire is elastically and tightly matched on the contact frame 2. The two inner bending structures continuously provide approximately centered elastic clamping force for the wire, and the wire is stably and centrally arranged in the clamping joint 21 along the clamping direction, so that the wire is stably clamped.

In addition, the back of the internal bending structure is provided with a stopping space, and the wire inserting space is positioned on the front of the internal bending structure and is opposite to the stopping space in the wire passing channel. The retaining space is resiliently engaged with the lead wire placed in the clamp fitting 21 in a point contact manner. Therefore, the separation of the wire and the clamping joint 21 can be realized by directly pulling out the wire in the reverse direction by force of a user, the arrangement of the existing operating mechanisms such as a spanner, a handle and the like is cancelled, the quick plugging and pulling of the wire are more facilitated, and the operation is simpler and more convenient.

In one embodiment, the limit position of the internal bending structure is approximately the threshold of the movement of the elastic member 211 to avoid the flexible bending. The distance in the initial state is 0-0.6mm, the opening value of the wire plugging space is 30-60, the accurate and in-place wire plugging mode of the clamping joint 21 to the wires is further improved, the clamping joint can be reasonably matched with the clamping of the wires with different specifications, the adaptability is better, and the clamping requirements of external plug-ins such as the most wires in the market are met.

And the jacking structure can limit the inner bending structure at the limit position, so that the floating value of the spacing ranges from 0.1mm to 0.3mm, and the fluctuation range of the opening degree value ranges from 5 degrees to 24 degrees. To demonstrate the effectiveness of various embodiments of the present invention, the pitch may have a value of 0 and 0.6mm and any value in between when no wire is inserted. Specifically, the floating value of the distance between the two ends of the elastic member 211 at the free end ranges from 0.1mm to 0.3mm, and the fluctuation range of the opening value ranges from 5 degrees to 24 degrees, so that the distance is allowed to vary from 0mm to 0.9mm after the wire is inserted, and the wire is clamped or pulled away by the elastic force. And the opening value of the plug wire space formed by the two internal bending structures can change along with the change of the spacing value after the lead is inserted, and the opening value is regularly and internally contracted, so that the spacing value and the opening value are in inverse proportion.

Wherein, further, the fluctuation value of the float value of interval and the opening value satisfies the following condition: k10 × n × L. Wherein, L is the numerical value of the value of floating, K is the numerical value of fluctuation, n is the constant and satisfies: n is more than or equal to 5 and less than or equal to 8. It should be noted that, the definition: in the initial state, the pitch value is d, and the opening value is α. Thus, in the working state after the insertion of the wire, the distance between the ends of the two free ends of the resilient member 211 is d + L, and the opening of the wire insertion space is α -K. And, every increase of value of floating is 0.1mm, and the corresponding n angles that reduce of opening value, such setting up the relation makes interior bending structure be different from prior art, and the effect is very showing.

In addition, further, the pitch in the initial state and the diameter of the wire insertion hole 14 satisfy the following condition: d ═ m × D. Where D is the pitch size in the initial state, D is the diameter size of the wire insertion hole 14, and m is a constant and satisfies: m is more than or equal to 2 and less than or equal to 4. It should be noted that, wire insertion hole 14 is constructed for the constant diameter D's of circle hole form to the adaptation is worn to establish in the wire, and, wire insertion hole 14's diameter D is 2-4 times bigger than interval size D, makes can enter into the wire specification in main part 1 via wire insertion hole 14, just can adapt to the dimensional parameter of the interior bending structure of elastic component, effectively screens out the wire specification that can damage inside contact frame 2 normal work, and then promotes the life of binding clip.

It should be noted that, as shown in fig. 3, the distance is the minimum distance between the two elastic members 211 at the free ends, and the opening is the included angle formed by the external tangents at the two free ends. Thus, the externally inserted wires are allowed to pass through the insertion space with the opening value to be guided into and elastically clamped on the contact frame 2 by being inserted at a spacing.

It should be noted that the terminal in this embodiment has an overall size within 10mm to 30mm, is a small connector structure, and has various sizes in the millimeter order, and has a high requirement for dimensional accuracy.

Referring to fig. 8 to 11, in one embodiment, the pushing mechanism includes an abutting member 25 disposed on the contact frame 2, and the abutting member 25 is integrally formed on the contact frame 2 and is protruded on the expanding path of the inward bending structure. Therein, in particular, the contact frame 2 is integrally formed from a metal piece, which comprises a support bottom 22 and a mounting side 23. The support base 22 is configured as a strip plate and is located below the wire passage, and the length direction thereof coincides with the direction of the wire passage. The mounting side portions 23 are vertically arranged on both sides of the support base portion 22 to form a both-side wing structure by which the contact frame 2 is snap-fitted into the main body 1. Wherein, by metalwork integrated into one piece's contact frame 2, its installation lateral part 23 roughly vertical configuration is in the both sides of supporting bottom 22 to form the flank structure, and then through the assembly of flank structure block in main part 1, realize the tight fit of contact frame 2 in main part 1, and do benefit to dismouting and maintenance.

Still further, the elastic member 211 is configured as a plate spring, in particular. The leaf spring is arranged extending at the mounting side 23 and directed in the opposite direction to the insertion of the wire. The end of the spring 211 remote from the free end is provided in an integrally formed manner on the side of the mounting side 23 and is bent inwardly at least once to form a free end with a spring force lying across the support base 22. Therefore, under the elastic force limit of the free ends at two sides, the externally inserted lead can be clamped between the two mounting side parts 23 in a centering manner, so that the lead is ensured to be clamped stably under the bidirectional elastic force contact, and the electric connection is realized. It should be mentioned here that there is always a gap between the leaf spring and the support base 22. Further facilitating free swinging of the resilient member 211 on the contact frame 2 to provide efficient resilient clamping or reverse extraction of the wire. In this embodiment, the releasing of the clamping of the wire may be realized by providing an operating mechanism (not shown) for controlling the elastic member 211 to swing, so as to release the clamping of the wire that needs to be reversely pulled out of the main body 1. Or the above-mentioned is realized by the back structure of the inner bending structure as a stopping space.

Further, the body of the support base 22 is raised upwardly such that the two end portions are configured as leg structures 24 and the middle portion is configured to project upwardly as a whole and transition into engagement with the leg structures 24 in an arc. Wherein the mounting side 23 and the clamping joint 21 are both located in a central position. Therefore, functional components for clamping and assembling are supported in the main body 1 by elasticity, and clamping of the lead and stable configuration of the contact frame 2 are facilitated. Moreover, the leg structure 24 can be mounted in place with the main body 1 in a nested engagement, cooperating with the wing structure to secure the entire contact frame 2 in the main body 1. More importantly, the abutting piece 25 is constructed to be integrally bent and formed at a middle position and to be upwardly convex. Therefore, the contact frame 2 is integrally formed, the abutting piece 25 is directly arranged on the supporting bottom 22 of the contact frame 2, and the inner bending structure is more limited and tightly pushed.

It should be noted that the wire enters the wire passage and is clamped in the contact frame 2 to switch the wire insertion space from the initial state to the working state, and the corresponding trigger elastic member 211 is moved to open the two inner bending structures in the direction away from each other. The inner bending structure has elastic restoring force, so that the wires can be clamped by elasticity. In other embodiments, the switching between the initial state and the working state may be realized by the above-mentioned operating mechanism, without limitation.

Referring to fig. 4 to 7, in another embodiment, the tightening structure includes a locking member 18 disposed on an inner wall of the body 1. The protruding part 18 is set back from the inner bending structure of the contact frame 2 and is configured on the path of the inner bending structure for opening movement. Specifically, the main body 1 includes at least an upper housing wall 11 and a lower housing wall 12 which are spaced apart from each other and opposed to each other, and a side housing wall 13 which is adjacent to and surrounds outer peripheries of the upper housing wall 11 and the lower housing wall 12. The main body 1 is configured into a shell with a hollow bottom surface, and the contact frame 2 can be assembled in the main body 1 from bottom to top relative to the main body 1 and partially or completely block the bottom surface of the main body 1. The lower housing wall 12 has a sinking surface 121, the sinking surface 121 forms a partial or complete interior space for accommodating the contact frame 2 in a manner of sinking towards the upper housing wall 11, and at least a part of the sinking surface 121 can be disposed to coincide with the upper housing wall 11.

Therefore, the plastic shell body 1 is in a shell shape with a hollow bottom surface, so that the contact frame 2 can be assembled in the body 1 from top to bottom to at least partially block the bottom surface of the body 1, the contact frame 2 is prevented from being directly exposed out of the body 1, and the contact frame 2 is convenient to assemble and disassemble in the body 1. The main body 1 is a shell with an inner space surrounded by shell walls, and the sinking surface 121 arranged on the lower shell wall 12 forms at least part of the inner space by sinking, so that the main body 1 is of a shell shape with a hollow bottom surface, the materials can be effectively saved, the production cost is reduced, meanwhile, the daily maintenance and the heat dissipation effect inside during electric connection are facilitated, and the practicability is high.

In one embodiment, the depression surface 121 is arranged in a vertically aligned depression, and at least part of the depression surface 121 can form a step surface 111 at the upper housing wall 11, the step surface 111 being higher than the depression surface 121 coinciding with the upper housing wall 11. The sunken surface 121 is vertically aligned to meet the condition of rapid demoulding, and the step surface 111 is higher than the upper housing wall 11, so that the thickness of part of the upper housing wall 11 is supported by the step surface 111, the main body 1 is stabilized, and a concave-convex inner space is formed for clamping and assembling the conductive terminals. In cooperation with this, the snap-fit member 18 is integrally formed on the step surface 111. The convex clamping piece 18 can approach the contact frame 2 assembled in the main body 1 infinitely, is arranged at intervals with the internal bending structure in the initial state and is positioned in the opening path, and can abut against the elastic piece 211 when the internal bending structure moves to the limit position, so that the elastic fatigue of the plate spring is fundamentally prevented, and the service life of the clamping joint 21 is prolonged. And the internal bending structure is prevented from being elastically bent to exceed the limit position, the specification of the wire suitable for clamping can be effectively classified, and the wiring terminal is ensured to normally work in the movement range allowed by the internal bending structure all the time.

In one embodiment, the protruding member 18 extends in a length direction to contact the contact frame 2 to limit the contact frame 2 in the inner space, so that the contact frame 2 is spaced from the step surface 111. Therefore, the contact frame 2 assembled in the main body 1 can be abutted against the position of the convex clamping piece 18 to ensure that the contact frame 2 is installed in place, and is spaced from the step surface 111 to avoid damage to the contact frame 1 during assembly. In addition, the distance between the convex clamping piece 18 and the internal bending structure in the initial state is preferably 0.15mm-0.3 mm. Due to the distance arrangement, the inner bending structure can be normally used within the floating value range, and the convex clamping pieces 18 arranged on one side of the inner bending structure at intervals are arranged at preset distances, so that the elastic joint 21 is effectively prevented from being used beyond the range, and the service life is ensured.

Above only the utility model discloses an it is preferred embodiment, the utility model discloses a scope of protection not only limits in above-mentioned embodiment, and the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection.

Claims (8)

1. A connecting terminal is characterized by comprising a plastic shell main body and at least one contact frame which is arranged in the main body and used for clamping a lead;

the contact frame is provided with a clamping joint for inserting the lead, the clamping joint is formed by a pair of elastic pieces, the free ends of the two elastic pieces are constructed into an inner bending structure and are symmetrically arranged in the contact frame, and the lead can be elastically clamped after entering the wire passing channel along the wire inserting hole formed in the main body through elastic matching; wherein,

the clamping device also comprises a jacking structure which is arranged on the main body and used for limiting the continuous spreading movement of the inner bending structure and preventing the clamping failure of the clamping joint; the jacking structure is arranged on a movable path of the inner bending structure and is matched with the inner bending structure in an initial state in a spaced mode, so that the inner bending structure can be abutted against the wire after the wire is inserted and moves to a limit position.

2. The connecting terminal according to claim 1, wherein a space allowing a wire to be inserted and pulled exists between two end portions of the free end of the elastic member, and the two inner bending structures face the wire insertion hole and are located in the area where the wire passing channel is located to form a wire insertion space which is approximately in an outer splayed shape, so that the wire can continuously enter the wire passing channel along the insertion direction.

3. The connection terminal of claim 2, wherein the limit position of the internal bending structure is approximately the threshold of the movement of the elastic member to avoid flexible bending; wherein,

the distance in the initial state is 0-0.6mm, and the opening value of the wire plugging space is 30-60 degrees; and the jacking structure can limit the inner bending structure to the limit position, so that the floating value of the spacing ranges from 0.1mm to 0.3mm, and the fluctuation range of the opening value ranges from 5 degrees to 24 degrees.

4. The connection terminal according to claim 1, wherein the tightening structure includes a snap member disposed on an inner wall of the body; the convex clamping piece and the inner bending structure of the contact frame are arranged in an avoiding mode and are arranged on the opening moving path of the inner bending structure.

5. The terminal according to claim 4, wherein the body includes at least upper and lower housing walls spaced apart from each other and opposed to each other, and a side housing wall adjacent to and embracing outer peripheries of the upper and lower housing walls; the contact frame can be assembled in the main body from bottom to top relative to the main body and partially or completely block the bottom surface of the main body; wherein,

the lower housing wall has a sinking surface, the sinking surface forms a partial or full inner space for accommodating the contact frame in a manner of sinking towards the upper housing wall, and at least part of the sinking surface can be arranged in a manner of being overlapped with the upper housing wall.

6. The terminal according to claim 5, wherein the depressed face is disposed along a vertical alignment depression, and at least a portion of the depressed face is capable of forming a stepped face at the upper housing wall, the stepped face being higher than the depressed face coincident with the upper housing wall; and the clamping convex piece is integrally formed on the step surface.

7. The terminal according to claim 6, wherein the tab member extends lengthwise into contact with the contact frame to confine the contact frame within the interior space such that the contact frame is spaced from the step surface.

8. A terminal according to claim 5, wherein the distance between the snap-fit member and the inner bent structure in the initial state is 0.15mm-0.3 mm.

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