CN108808277B

CN108808277B - Wiring terminal

Info

Publication number: CN108808277B
Application number: CN201711408913.7A
Authority: CN
Inventors: 陈斌斌
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-05-05
Filing date: 2017-12-22
Publication date: 2024-04-23
Anticipated expiration: 2037-12-22
Also published as: CN108808277A; CN207664252U; CN207559093U

Abstract

The embodiment of the invention provides a wiring terminal. The wiring terminal includes: the conductive piece is arranged opposite to the elastic piece, and an external lead is clamped between the conductive piece and the elastic piece through elastic deformation of the elastic piece; the conductive piece is of a strip-shaped sheet structure; the elastic sheet comprises at least two free parts which are elastically deformed, and the at least two free parts are distributed along the length direction of the strip-shaped sheet structure. The embodiment of the invention can simplify the structure of the conductive piece, reduce the use amount of the conductive material and the complexity of the die for preparing the conductive piece, and realize the miniaturized design of the wiring terminal.

Description

Wiring terminal

Technical Field

The invention relates to the technical field of electricity, in particular to a wiring terminal.

Background

Binding post refers to an accessory product for realizing electrical connection, can be at any time with two or more wires according to needs through binding post, and need not to weld together or twine together, convenient and fast.

In the existing terminal, the free portion and the fixed portion of the spring plate are matched with the conductive member to form an assembly to be placed inside the insulating housing of the terminal, which requires that the conductive member be made into an L-shaped structure. This not only increases the complexity of the mold for preparing the conductive member, but also wastes the conductive material, and at the same time, it is difficult to achieve a miniaturized design of the connection terminal due to the oversized conductive member.

Disclosure of Invention

The embodiment of the invention provides a wiring terminal, which aims to simplify the structure of a conductive piece, reduce the use amount of a conductive material and the complexity of a die for preparing the conductive piece, and realize the miniaturization design of the wiring terminal.

In order to solve the technical problems, the invention provides a wiring terminal. The wiring terminal includes: a conductive member and a spring plate; the conductive piece is arranged opposite to the elastic piece, and an external wire is clamped between the conductive piece and the elastic piece through elastic deformation of the elastic piece; the conductive piece is of a strip-shaped sheet structure; the elastic sheet comprises at least two free parts which are elastically deformed, and the at least two free parts are distributed along the length direction of the strip-shaped sheet structure.

Optionally, the connection terminal further includes: an insulating housing; the insulating shell is provided with a U-shaped slot; the conductive piece is clamped in the U-shaped slot; a first positioning protrusion or a first positioning groove is arranged at a first position of the conductive piece, which is in contact with the groove wall of the U-shaped slot; and a second positioning groove or a second positioning protrusion which is matched with the U-shaped slot is arranged at a second position opposite to the first position on the slot wall of the U-shaped slot.

Optionally, the insulating housing includes: the upper cover is buckled on the mounting base; the mounting base is provided with a spring piece mounting cavity and the U-shaped slot positioned above the spring piece mounting cavity; the elastic sheet is accommodated in the elastic sheet installation cavity.

Optionally, the elastic sheet is of a U-shaped structure, and the U-shaped slot is located above the opening side of the U-shaped structure; the mounting base is also provided with a detection groove extending into the elastic sheet mounting cavity from the edge of the mounting base; the external detection device extends into the elastic sheet mounting cavity through the detection groove and is contacted with the closed side of the U-shaped structure of the elastic sheet in the elastic sheet mounting cavity.

Optionally, the upper cover is provided with wire inlet holes leading to the gap between different free parts of the elastic sheet and the conductive piece; and a blocking wall is arranged between two adjacent wire inlet holes.

Optionally, the opening of the U-shaped slot faces the wire inlet hole, and the conductive piece is inserted into the U-shaped slot along the wire inlet direction.

Optionally, the elastic sheet includes a fixing portion and the at least two free portions, the at least two free portions are arranged in a straight line along the length direction of the fixing portion, and a gap is reserved between any two adjacent free portions.

Optionally, the conductive piece is provided with at least two tilting parts protruding towards the elastic piece, and the at least two tilting parts are in one-to-one correspondence with the free ends of the at least two free parts of the elastic piece; the tilting part and the corresponding free end are arranged back and forth along the incoming line direction of the external lead.

Optionally, a long side of the conductive member is provided with a third positioning protrusion; and a third positioning groove matched with the third positioning protrusion is formed in the position, corresponding to the third positioning protrusion, of the insulating shell of the wiring terminal.

Optionally, the connection terminal further includes: an operation handle abutted with the elastic sheet; at least two bearing surfaces are arranged on the operating handle; and along the pulling track of the operating handle, each bearing surface of the at least two bearing surfaces is sequentially flatly attached to the inner surface of the insulating shell of the wiring terminal, so that the elastic sheet generates different elastic deformations.

Optionally, a through hole is formed in the insulating housing of the wiring terminal, and the operating handle penetrates through the through hole, so that the handheld part and the bearing part of the operating handle are respectively positioned at the inner side and the outer side of the housing; the end part of the bearing part is abutted with the elastic sheet.

Optionally, the carrying part includes two carrying arms, and the two carrying arms are oppositely disposed at two sides of one end of the hand-held part, so as to form a U-shaped groove structure; the end parts of the two bearing arms are respectively abutted with the elastic sheet; the two bearing arms are provided with the at least two bearing surfaces.

Optionally, the through hole is a rectangular hole; a limiting rectangular block extending into the through hole and positioned between the two bearing arms of the operating handle is arranged at one edge of the through hole on the insulating shell; opposite surfaces of the two bearing arms are respectively contacted with two opposite side walls of the limit rectangular block; the opposite surfaces of the two bearing arms are respectively contacted with the two opposite edges of the shell, which are positioned at the through holes.

In the technical scheme provided by the embodiment of the invention, the adopted conductive piece is of a strip-shaped piece structure, at least two free parts of the elastic piece are distributed along the length direction of the strip-shaped piece structure, and the external lead is clamped between the elastic piece and the conductive piece through elastic deformation of the elastic piece. When a plurality of external wires are respectively clamped between different elastic sheets and the conductive piece, the conductive piece can be used for realizing the conduction of the plurality of external wires. Compared with the prior art, the invention has the advantages that the volume of the adopted conductive piece is small, the structure is simple, the die structure of the conductive piece is simplified, and the conductive material is saved, so that the mechanism of the wiring terminal is more compact, and the generation cost of the wiring terminal is lower.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description will be given below of the drawings required for the embodiments or the prior art descriptions, and it is obvious that the drawings in the following description are some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a cross-sectional view of a terminal according to an embodiment of the present invention;

FIG. 2 is a schematic view of an operation handle according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a terminal when an operating handle is in an initial position according to still another embodiment of the present invention;

FIG. 4 is a cross-sectional view of a terminal when an operating handle is in an extreme position according to yet another embodiment of the present invention;

FIG. 4a is an enlarged view of the portion I of FIG. 4;

FIG. 5 is a schematic structural diagram of a spring plate according to an embodiment of the present invention;

FIG. 6 is a cross-sectional view of a snap-action latch structure for a terminal according to another embodiment of the present invention;

fig. 7 is a schematic structural view of an upper cover of a connection terminal according to an embodiment of the present invention;

FIG. 8 is a perspective view of a conductive member according to an embodiment of the present invention;

FIG. 8a is a schematic plan view of a conductive member according to an embodiment of the present invention;

fig. 9 is a schematic structural view of a terminal mounting base according to an embodiment of the present invention;

FIG. 10 is a schematic plan view of a conductive member according to an embodiment of the present invention;

fig. 11 is a structural perspective view of a connection terminal according to an embodiment of the present invention;

Fig. 12 is a schematic plan view of a connecting terminal according to an embodiment of the invention;

fig. 13 is a schematic view of another structure of a top cover of a connection terminal according to an embodiment of the present invention;

Fig. 14 is a schematic plan view of a terminal mounting base according to an embodiment of the present invention;

Fig. 15 is a cross-sectional view of a terminal in a clamped state when an external wire is inserted into the terminal according to an embodiment of the present invention;

Fig. 16 is a cross-sectional view of an external lead inserted into a terminal according to an embodiment of the present invention in an unclamped state;

FIG. 17 is a cross-sectional view of a terminal when an external wire according to an embodiment of the present invention is pulled out from the inside of the terminal;

FIG. 18 is a schematic view of a trigger spring, a conductive member and a mounting base according to an embodiment of the present invention;

fig. 19 is a cross-sectional view of a connection terminal according to another embodiment of the present invention.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, the "plurality" generally includes at least two, but does not exclude the case of at least one.

It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

It should be understood that although the terms first, second, third, etc. may be used in embodiments of the present invention to describe XXX, these XXX should not be limited to these terms. These terms are only used to distinguish XXX from each other. For example, a first XXX may also be referred to as a second XXX, and similarly, a second XXX may also be referred to as a first XXX, without departing from the scope of embodiments of the invention.

The words "if", as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to monitoring", depending on the context. Similarly, the phrase "if determined" or "if monitored (stated condition or event)" may be interpreted as "when determined" or "in response to determination" or "when monitored (stated condition or event)" or "in response to monitoring (stated condition or event), depending on the context.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such product or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a commodity or system comprising such elements.

In one embodiment, as shown in fig. 1 and 2, the pull and spring structure of the connection terminal includes: a spring plate 4 and an operation handle 5 abutting against the spring plate 4; wherein, the operating handle 5 is provided with at least two bearing surfaces; along the pulling track of the operating handle 5, each of the at least two bearing surfaces is sequentially flattened against the inner surface of the terminal insulating housing 101, so as to cause different elastic deformations of the spring plate 4.

In practical implementation, as shown in fig. 1, 3 and 4, the spring plate 4 is accommodated in the terminal insulating housing 101, the end 501 of the operating handle 5 abuts against the spring plate 4, and at least two bearing surfaces on the operating handle 5 are sequentially flatly attached to the inner surface of the terminal insulating housing 101 in the process of pulling the operating handle 5, and because the terminal insulating housing 101 is made of a rigid material, the end of the operating handle 5 abuts against the spring plate 4 to generate elastic deformation in the process of pulling the operating handle 5.

In the technical scheme provided by the embodiment of the invention, at least two bearing surfaces are arranged on an operating handle; in the process of pulling the operating handle, each bearing surface of the at least two bearing surfaces is sequentially flatly attached to the inner surface of the insulating shell of the wiring terminal, and the elastic sheet can generate different elastic deformation due to the abutting of the operating handle and the elastic sheet. Compared with the prior art, the invention only needs to arrange at least two bearing surfaces on the operating handle, does not need to arrange the rotating wheel rotating around the rotating shaft, does not need to position the rotating shaft during installation, simplifies the process, reduces the installation difficulty, reduces the volume of the operating handle, and realizes the miniaturized design of the wiring terminal.

Further, as shown in fig. 7, the reinforcing rib 36 may be provided at a side contact position of the insulating housing 101 with the operation handle 5 provided with at least two bearing surfaces, which are sequentially flattened against the inner surface of the reinforcing rib 36 on the terminal insulating housing 101, along the pulling locus of the operation handle 5.

Furthermore, any two adjacent bearing surfaces in the at least two bearing surfaces are intersected, and a smooth transition curved surface is arranged at the intersection position of the two bearing surfaces.

Preferably, any two adjacent bearing surfaces in the at least two bearing surfaces are connected through a smooth transition curved surface. In this embodiment, the smooth transition curved surface is disposed between two adjacent bearing surfaces, so as to reduce the pulling resistance of the pulling operation handle, and facilitate the user to pull the operation handle.

It should be noted that, any two adjacent bearing surfaces of the at least two bearing surfaces may not be in contact, and may not be connected by a smooth transition curved surface, and only a smooth curved surface is required to be disposed on two edges of the adjacent and opposite edges of the any two adjacent bearing surfaces, so as to facilitate the switching of bearing surfaces that are flatly attached to the inner surface of the insulating housing 101 of the terminal when the operating handle 5 is pulled, and reduce the pulling resistance of the pulling operating handle.

Further, as shown in fig. 2, 3 and 4, the operating handle 5 is provided with two bearing surfaces, and the two bearing surfaces include: a long plane 60 and a short plane 59 connected to the long plane 60; wherein the long plane 60 is at a smaller distance from the end 501 of the operating handle 5 than the short plane 59 is from the end 501 of the operating handle 5; the end 501 of the operating handle 5 abuts against the elastic piece 4. When the short plane 59 is flattened with the inner surface of the terminal insulating housing 101, the elastic sheet 4 generates a first elastic deformation amount; when the long plane 60 is flattened with the inner surface of the insulating shell of the wiring terminal, the elastic sheet 4 generates a second elastic deformation amount; the first elastic deformation amount is larger than the second elastic deformation amount.

As shown in fig. 3, the long plane 60 is flattened against the inner surface of the terminal insulating housing 101, and when the operation handle is pulled in the pulling direction x shown in fig. 4, the bearing surface flattened against the inner surface is switched from the long plane 60 to the short plane 59, since the first distance from the short plane 59 to the end 501 of the operation handle 5 is greater than the second distance from the long plane 60 to the end 501 of the operation handle 5, that is, when the short plane 59 is flattened against the inner surface of the terminal insulating housing 101, the distance from the end 501 of the operation handle 5 to the inner surface of the terminal insulating housing 101 is the first distance; when the long plane 60 is flattened with the inner surface of the terminal insulating housing 101, the distance from the end 501 of the operating handle 5 to the inner surface of the terminal insulating housing 101 is the second distance; the first distance is greater than the second distance, and since the terminal insulating housing 101 is made of a rigid material, the end 501 of the operating handle 5 will necessarily press the elastic sheet 4 to elastically deform the elastic sheet 4. Wherein the angle between the long plane 60 and the short plane 59 may be 80-100 degrees.

As shown in fig. 3 and 4, the bearing portion 503 includes a long plane 60 and a short plane 59, when the operating handle is at the initial position in the pulling track, the long plane 60 is flush with the inner surface of the terminal insulation housing 101, and when the operating handle is pulled to the limit position in the pulling track according to the x direction shown in fig. 4, the end 501 of the operating handle 5 applies an external force to the spring plate 4, and under the elastic action of the spring plate 4, the short plane 59 is flush with the inner surface of the terminal insulation housing 101.

Further, as shown in fig. 2, the operation handle 5 includes: a hand-held portion 502 and a bearing portion 503; the carrying portion 503 includes two carrying arms 58, and the two carrying arms 58 are oppositely disposed at two sides of one end of the hand-holding portion 502 to form a U-shaped slot structure; the end parts 53 of the two bearing arms 58 are abutted with the elastic sheet 4; the two carrying arms 58 are each provided with the at least two carrying surfaces. In this embodiment, the spring 4 is respectively biased by the two bearing arms 58, that is, when the spring 4 is pressed, there are two points of force, so that the stress of the spring is relatively balanced, and the situation that only one side of the spring is pressed and the other side of the spring is tilted is avoided. The handheld part and the bearing part can be 130-150 degrees.

For convenience of description below, the two carrier arms are a first carrier arm 58a and a second carrier arm 58b, respectively.

The opposite faces of the two carrier arms 58 include a first side of a first carrier arm 58a and a second side of a second carrier arm 58 b; the opposite faces of the two carrier arms 58 include a third side of the first carrier arm 58a and a fourth side of the second carrier arm 58 b. The at least two bearing surfaces may be provided on a first or third side of the first bearing arm 58a and a second or fourth side of the second bearing arm 58 b.

In one possible implementation, as shown in fig. 2, the two carrying arms 58 are provided with protruding blocks 51 on opposite sides (i.e. the first side and the second side described above); at least two side surfaces intersecting with the opposite surfaces of the protruding block 51 form the at least two bearing surfaces. Fig. 2 shows that the long plane 60 and the short plane 59 are formed by two sides intersecting on the bump 51.

When the operating handle 5 is at the initial position in the pulling track, the long plane 60 on the first bearing arm 58a and the second bearing arm 58b are flatly attached to the inner surface of the terminal insulation shell 101; when the operating handle 5 is at the limit position in the pulling track, the end 501 of the operating handle 5 applies an external force to the elastic sheet 4, and under the elastic action of the elastic sheet 4, the short planes 59 on the first bearing arm 58a and the second bearing arm 58b are all flat with the inner surface of the insulating housing of the terminal.

In one possible embodiment, the reinforcement ribs 36 may be provided at the side contact positions of the insulating housing 101 with the first and second carrying arms 58a, 58b provided with the long flat surfaces 60, 59, so that the long flat surfaces 60, 59 are in flat contact with the inner surfaces of the reinforcement ribs 36 in the initial or extreme positions, respectively. I.e. the initial position, the long flat surfaces 60 of the first and second carrier arms 58a, 58b lie flat against the inner surface of the stiffener 36 on the insulating housing 101, and the extreme position, the short flat surfaces 59 of the first and second carrier arms 58a, 58b lie flat against the inner surface of the stiffener 36 on the terminal insulating housing 101. Fig. 3 shows only one carrier arm lying flat against the inner surface 36a of the rib 36 on the terminal insulation housing.

The long plane 60 and the short plane 59 on each carrying arm 58 are connected by a smooth transition curved surface, and the smooth transition curved surface is contacted with the inner surface 36a of the reinforcing rib 36 on the insulating housing 101 in the process of the operating handle from the initial position to the limit position.

As shown in fig. 2, the long plane 60 intersects the top surface 5a of the carrier arm 58 and the short plane 59 is angled from 80 to 100 ° to the top surface 5a, i.e., the short plane 59 is substantially perpendicular to the top surface 5 a. The long plane 60 and the short plane 59 smoothly transition. The entity defined by the long plane 60 and the short plane 59 thus constitutes an eccentric cam structure. The top surface 5a is a side surface of the carrying arm 58 facing the outside of the terminal insulating housing when the operating handle is in the initial position.

Further, as shown in fig. 2, a step 57 higher than the upper surface of the holding portion 502 is provided at the connection portion between the bearing portion 503 and the holding portion 502. As shown in fig. 4, when the operating handle 5 is at the limit position of the pulling track, the hand-holding portion 502 is angled to the upper surface of the terminal insulating housing 101, the step 57 enters the terminal insulating housing 101, and the step surface 57a of the step 57 abuts against the inner surface of the terminal insulating housing 101. Because in practical application, considering the miniaturized design of binding post, the area of the loading surface on the operating handle can be designed very little generally, consequently, when operating handle pulls extreme position, because receive the great elastic force of shell fragment 4, the condition that the loading surface contacts with the inside surface of binding post insulating housing and skids very easily appears, consequently, through the step face butt of step on with the inside surface of binding post insulating housing, can effectively avoid the condition of skidding, and then increased the stability when operating handle is in extreme position.

In one possible embodiment, the terminal insulating housing 101 is provided with a flange 37 corresponding to the step 57. As shown in fig. 4 and 4a, when the operating handle 5 is pulled to the limit position, the flange 37 is buckled with the step 57 to increase the stability of the operating handle in the limit position

Further, the hand-holding part 502 includes: a first hand-held portion 502a and a second hand-held portion 502b; when the operating handle 5 is at the initial position in the pulling track, the first holding portion 502a is attached to the upper surface of the terminal insulation housing 101, and the second holding portion 502b extends out of the end surface of the terminal insulation housing 101 and is tilted upwards. In this embodiment, the user can conveniently pull up the operating handle through the second hand-hold portion.

Further, one or more of the following methods may be employed to avoid rattling or shifting of the operating handle when in the initial position:

The method comprises the following steps: an end surface of the first hand-held portion 502a, which is attached to the upper surface of the terminal insulating housing 101, is provided with a fastening structure (not shown) for fastening to the upper surface of the terminal insulating housing. Specifically, a first fastening structure is disposed on an end face of the first hand-holding portion 502a, which is attached to the upper surface of the insulating housing 101 of the terminal, and a second fastening structure is disposed at a position of the outer surface of the insulating housing 101 of the terminal, which corresponds to the first fastening structure, when the operating handle 5 is at the initial position, and the first fastening structure and the second fastening structure are used in cooperation, so that the hand-holding portion is locked on the upper surface of the insulating housing when the operating handle is at the initial position. Thus, the shaking or shifting of the operating handle at the initial position can be avoided.

The second method is as follows: as shown in fig. 2, the opposite sides of the first hand-holding portion 502a are provided with fixing grooves 54, and the terminal insulating housing 101 is provided with a protruding fastening point fastened to the fixing groove 54 at a position corresponding to the fixing groove 54 when the operating handle 5 is in the initial position. The fixing groove 54 may have an inverted trapezoidal shape. The operation handle can be locked on the upper surface of the insulating housing 101 of the wiring terminal through the buckling of the fixing groove and the convex buckling point, so that the stability of the operation handle in the initial position is improved, and further shaking or offset is avoided.

Further, as shown in fig. 2, four anti-slip grooves 56 are provided on the lower surface of the second hand-holding portion 502b and/or two first anti-slip flanges 52 are provided on the upper surface of the first hand-holding portion 502 a. The anti-slip grooves and/or the anti-slip flanges prevent the user from slipping between the hand-held part and the fingers of the user when the user pulls the operating handle. Further, as shown in fig. 5 and 6, the elastic sheet 4 includes a fixed portion 44 and a free portion 43; the fixed part 44 and the free part 43 are connected and have a U-shaped structure; the free portion 44 includes: an electrical connection segment 4021, an arcuate segment 4022 (i.e., a closed side) connecting the fixed portion, and an intermediate segment 4023 disposed between the electrical connection segment 4021 and the arcuate segment 4022; the intermediate section 4023 abuts the operating handle 5. The operating handle 5 is pulled, and the end 53 of the bearing part 503 of the operating handle 5 abuts against the middle section 4023, so that the free part 402 of the elastic sheet 4 is elastically deformed.

Further, the electrical connection section 4021 is tilted away from the fixing part 44.

Further, the width of the middle segment 4023 is greater than the width of the electrical connection segment 4021; the middle section 4023 is wider than the electric connection section 4021, and a limiting piece 41 extends towards the electric connection section 4021; the angle between the limiting piece 41 and the middle section 4023 is smaller than the angle between the electric connection section 4021 and the middle section 4023. As shown in fig. 5 and 6, the angle between the limiting plate 41 and the middle section 4023 and the angle between the electric connection section 4021 and the middle section 4023 are obtuse angles. In particular embodiments, the end 501 of the operating handle 5 (i.e. the end 53 of the carrier portion) abuts against the intermediate section 4023 at a location wider than the electrical connection section 4021.

In one possible technical solution, the two sides of the middle section 4023 are wider than the two sides of the electrical connection section 4021, the end portions 53 of the two carrying arms 58 of the operating handle 5 are respectively abutted to the two sides of the middle section 4023, and the abutted positions are located at positions where the middle section 4023 is wider than the two sides of the electrical connection section 4021. In this way, in the process of pulling the operating handle, the two sides of the middle section of the elastic sheet are stressed uniformly, so that one side of the elastic sheet can be prevented from tilting. In addition, the limiting piece is arranged to avoid the slipping condition in the specific direction when the end part of the operating handle is in contact with and pressed against the elastic piece.

Further, one end of the middle section 4023, which is wider than the position of the electrical connection section 4021, may extend toward the direction of the electrical connection section 4021 to form a limiting piece, and the other end of the middle section 4023, which is wider than the position of the electrical connection section 4021, may extend toward the direction of the arc-shaped section 4022 to form a secondary limiting piece (not shown). The angle between the limiting piece and the middle section 4023 is smaller than the angle between the electric connection section 4021 and the middle section 4023; the limiting piece, the auxiliary limiting piece and the electric connection section form a U-shaped groove structure. Thus, the end 501 of the operating handle 5 is limited to move between the limiting piece and the auxiliary limiting piece, so that the problems of slip failure and the like are effectively prevented.

Further, the middle segment 4023 includes: a central portion 4023a, and first and second pressing pieces 4023b and 4023c located on both sides of the central portion; one end of the first pressing piece 4023b and one end of the second pressing piece 4023c, which are close to the electric connection end 4021, are connected with a limiting piece 41; a limiting protrusion 42 is disposed between the central portion 4023a and the first pressing piece 4023b, and between the central portion 4023a and the second pressing piece 4023c; the operating handle 5 is provided with a second bearing arm 58b for abutting the first abutting piece 4023b and the limiting piece and a first bearing arm 58a for abutting the second abutting piece 4023c and the limiting piece; the limit projection 42 is located between the first carrying arm 58a and the second carrying arm 58b to limit the lateral displacement of the operating handle 5.

Further, as shown in fig. 5, at least two free portions 43 of the spring are arranged in a straight line along the length direction of the fixing portion 44, and a gap is left between any two adjacent free portions 43.

Further, the end of the fixing portion 44 is provided with a slope inclined away from the middle section 4023.

Further, the end 501 of the operating handle 5 has a cylindrical structure; the cylindrical surface of the end 501 abuts against the elastic sheet 4. The end part is arranged into a cylindrical structure and is abutted with the elastic sheet, so that the abrasion of the end part caused by the contact friction with the elastic sheet can be effectively relieved, the mechanical service life of the operating handle is prolonged, and the reliability of the wiring terminal is further improved.

In the technical scheme provided by the embodiment of the invention, at least two bearing surfaces are arranged on an operating handle; in the process of pulling the operating handle, each bearing surface of the at least two bearing surfaces is sequentially flatly attached to the inner surface of the insulating shell of the wiring terminal, and the elastic sheet can generate different elastic deformation due to the abutting of the operating handle and the elastic sheet. Compared with the prior art, the invention only needs to arrange at least two bearing surfaces on the operating handle, does not need to arrange a rotating wheel, does not need to position the rotating shaft during installation, not only simplifies the process, but also reduces the installation difficulty, simultaneously reduces the volume of the operating handle, and realizes the miniaturized design of the wiring terminal.

In another embodiment, as shown in fig. 1, 5, 8 and 9, the connection terminal includes: the conductive piece 6 and the spring piece 4; wherein, the conductive member 6 is disposed opposite to the elastic sheet 4, and the external wire is clamped between the conductive member 6 and the elastic sheet 4 by elastic deformation of the elastic sheet 4; the conductive piece 6 is of a strip-shaped sheet structure; the elastic sheet 4 comprises at least two free parts which generate elastic deformation, and the at least two free parts are distributed along the length direction of the strip-shaped sheet structure.

As shown in fig. 9, at least two free portions 43 of the elastic sheet are arranged side by side along the length direction of the strip-shaped sheet structure. A wire connection 100 is formed between the free end 4021a of each free part 43 and the conductive member 6, and the number of the wire connection 100 is equal to the number of the free parts 43 of the elastic sheet 4. Each of the wiring sites 100 is arranged along the length direction of the strip structure.

Further, as shown in fig. 9 and 10, the connection terminal further includes: an insulating housing 101; the insulating shell 101 is provided with a U-shaped slot 21; the conductive piece 6 is clamped in the U-shaped slot 21; a first positioning protrusion or a first positioning groove is arranged at a first position of the conductive piece 6, which is contacted with the groove wall of the U-shaped slot 21; and a second positioning groove or a second positioning protrusion which is matched with the first positioning groove is formed in a second position opposite to the first position on the wall of the U-shaped slot 21. When the conductive member 6 is engaged in the U-shaped slot 21, the first positioning protrusion is engaged in the second positioning groove, or the second positioning protrusion is engaged in the first positioning groove.

For example: fig. 10 shows that a first positioning protrusion 61 is provided at a first position where one of two ends of the conductive member 6 contacts the wall of the U-shaped slot 21, and a second positioning groove (not shown) for cooperating with the first positioning protrusion 61 is provided at a second position opposite to the first position on the wall of the U-shaped slot 21.

The first position of the conductive piece 6, which is in contact with the groove wall of the U-shaped slot 21, has a first area and a second area, wherein the first area and the second area are respectively located at two opposite sides of the conductive piece 6, which are in contact with the groove wall of the U-shaped slot 21. In a specific implementation, the first positioning protrusion or the first positioning groove may be selectively provided in the first area and/or the first positioning protrusion or the first positioning groove may be provided in the second area. In one possible technical solution, the first positioning protrusion may be disposed in a first area and the first positioning groove may be disposed in the second area.

In one possible technical solution, the number of the U-shaped slots 21 is two, and the two U-shaped slots 21 are arranged on the insulating housing 101 in parallel and symmetrically. The two ends of the conductive piece 6 are respectively clamped in the two U-shaped slots 21.

In this embodiment, the conductive member may be fixed to the insulating housing through the U-shaped slot, and the conductive member may be prevented from being displaced in the U-shaped slot by providing a positioning protrusion and a positioning groove at the opposite positions of the inner slot wall of the U-shaped slot and the conductive member.

In one implementation, the insulating housing 101 includes: a mounting base 2 and an upper cover 3 buckled on the mounting base 2; wherein, the mounting base 2 is provided with a spring mounting cavity and the U-shaped slot 21 positioned above the spring mounting cavity; the elastic sheet 4 is accommodated in the elastic sheet installation cavity.

In one possible implementation, as shown in fig. 5, 9 and 11, the elastic sheet 4 is a U-shaped structure, and the U-shaped slot 21 is located above the opening side of the U-shaped structure; the mounting base 2 is also provided with a detection groove 25 extending into the spring plate mounting cavity from the edge of the mounting base 2; the external detection device extends into the spring plate mounting cavity through the detection groove 25 and is in contact with the closed side (namely the arc-shaped part) of the U-shaped structure of the spring plate 4 in the spring plate mounting cavity. The detection groove can be used for facilitating a user to detect the circuit on-off of the wiring terminal at any time.

The spring plate 4 comprises a fixed part 44 and a free part 43; the fixed part 44 and the free part 43 are connected and have a U-shaped structure; the free portion 44 includes: an electrical connection section 4021, an arcuate section 4022 connecting the fixing portion, and an intermediate section 4023 disposed between the electrical connection section 4021 and the arcuate section 4022; the intermediate section 4023 abuts the operating handle 5. The operating handle 5 is pulled, and the end 53 of the bearing part 503 of the operating handle 5 abuts against the middle section 4023, so that the free part 402 of the elastic sheet 4 is elastically deformed. A wire connection position 100 is formed between the free end 4021a of the free part 43 and the conductive member 6, and the wire connection position 100 can be conveniently positioned when the elastic piece 4 is assembled.

Further, the width of the middle section 4023 of the elastic piece is greater than the width of the electrical connection section 4021; the middle section 4023 is wider than the electric connection section 4021, and a limiting piece 41 extends towards the electric connection section 4021; the angle between the limiting piece 41 and the middle section 4023 is smaller than the angle between the electric connection section 4021 and the middle section 4023. As shown in fig. 5, the angle between the limiting plate 41 and the middle section 4023 and the angle between the electrical connection section 4021 and the middle section 4023 are obtuse angles. In particular, the end 501 of the operating handle 5 abuts against the intermediate section 4023 at a position wider than the electrical connection section 4021. In addition, the limiting piece is arranged to avoid the slipping condition in the specific direction when the end part of the operating handle is in contact with and pressed against the elastic piece.

In one possible solution, as shown in fig. 9, the bottom surface 27 of the mounting base 2 is provided with a positioning baffle 24, the positioning baffle 24 is disposed opposite to the limiting plate 41, the positioning baffle 24, the limiting plate 41 and the middle section 4023 are wider than the electric connection section 4021 to form a U-shaped groove structure, and the end 501 of the operating handle 5 is limited to move in the U-shaped groove, so that the problems of slipping failure and the like are effectively prevented.

Further, the two sides of the middle section 4023 are wider than the two sides of the electrical connection section 4021, the end portions 53 of the two carrying arms 58 of the operating handle 5 are respectively abutted to the two sides of the middle section 4023, and the abutted parts are located at positions where the middle section 4023 is wider than the two sides of the electrical connection section 4021. In this way, in the process of pulling the operating handle, the two sides of the middle section of the elastic sheet are stressed uniformly, so that one side of the elastic sheet can be prevented from tilting.

Further, the terminal insulating housing 101 is provided with a through hole 38, and the operating handle 5 penetrates through the through hole 38, so that the holding part 502 and the bearing part 503 of the operating handle 5 are respectively located at the inner side and the outer side of the upper cover 3; the end 501 of the bearing portion 503 abuts against the spring plate 4. As shown in fig. 7, the through hole 38 is provided in the upper cover 3, and the through hole 38 may be used as a detection groove. The through hole is convenient for the installation of the operating handle, and heat dissipation can be carried out through the through hole when the wiring terminal is in a working state.

Further, the carrying portion 503 includes two carrying arms 58, and the two carrying arms 58 are disposed on two opposite sides of one end of the holding portion 502, so as to form a U-shaped slot structure; the end parts of the two bearing arms 58 are respectively abutted with the elastic sheet 4; the two carrying arms 58 are each provided with the at least two carrying surfaces.

In this embodiment, as shown in fig. 5 and 18, the intermediate section 4023 includes: a central portion 4023a, and first and second pressing pieces 4023b and 4023c located on both sides of the central portion; one end of the first pressing piece 4023b and one end of the second pressing piece 4023c, which are close to the electric connection end 4021, are connected with a limiting piece 41; a limiting protrusion 42 is disposed between the central portion 4023a and the first pressing piece 4023b, and between the central portion 4023a and the second pressing piece 4023c; the operating handle 5 is provided with a second bearing arm 58b for abutting the first abutting piece 4023b and the limiting piece and a first bearing arm 58a for abutting the second abutting piece 4023c and the limiting piece; the limit projection 42 is located between the first carrying arm 58a and the second carrying arm 58b to limit the lateral displacement of the operating handle 5.

Further, the mounting base 2 is provided with a first positioning baffle 24a and a second positioning baffle 24b which are respectively opposite to the first limiting plate 41a and the second limiting plate 41b, an arc-shaped portion 4022 of the elastic sheet 4, which connects the fixing portion 44 and the free portion 43, is located between the first positioning baffle 24a and the second positioning baffle 24b, and a distance between the first positioning baffle 24a and the second positioning baffle 24b is equal to a width of the arc-shaped portion 4022. The first pressing piece 4023b, the first limiting piece 41a and the first positioning blocking piece 24a form a U-shaped groove structure to limit the end part of the corresponding bearing arm 58 to move in the U-shaped groove, and the second pressing piece 4023c, the second limiting piece 41b and the second positioning blocking piece 24b form a U-shaped groove structure to limit the end part of the corresponding bearing arm 58 to move in the U-shaped groove so as to avoid slipping failure.

In one possible solution, the upper cover 3 is provided with wire-feeding holes 32 leading to the gap between the different free portions of the elastic sheet 4 and the conductive member; a blocking wall is provided between two adjacent wire inlet holes 32. Therefore, the two wire inlet holes are mutually independent, and the wires do not interfere with each other when entering.

Further, the opening of the U-shaped slot 21 faces the wire inlet hole 32, and the conductive member is inserted into the U-shaped slot 21 along the wire inlet direction.

In one implementation, the elastic sheet includes a fixing portion 44 and the at least two free portions 43, where the at least two free portions 43 are arranged in a straight line along the length direction of the fixing portion 44, and a gap is left between any two adjacent free portions 43.

Further, as shown in fig. 1, 8 and 8a, at least two raising portions 62 protruding toward the spring plate 4 are provided on the conductive member 6, and the at least two raising portions 62 are in one-to-one correspondence with the free ends 4021a of the at least two free portions 43; the raising portion 62 and the corresponding free end 4021a are disposed back and forth along the incoming direction (the direction of arrow L in fig. 1) of the external wire, and the external wire reaches the raising portion 62 first and then reaches the free end 4021a along the incoming direction. The number of the raised portions 62 is equal to that of the free ends 4021a, and the raised portions 62 and the free ends 4021a corresponding to the raised portions constitute a wiring position 100. The setting of perk portion can be for fixing a position when installing the shell fragment.

In this embodiment, the free end and the conductive member form a clamping point, the end of the external wire reaches the tilting portion along the wire-feeding direction L, and then reaches the clamping point, the end of the external wire is clamped at the clamping point under the action of the elastic force of the elastic piece, and the tilting portion of the conductive member contacts with the external wire, so that when the external wire is pulled by an external force, the friction resistance between the tilting portion and the external wire can prevent the external wire from sliding from the clamping point to a certain extent.

Further, as shown in fig. 8 and 9, a long side of the conductive member 6 is provided with a third positioning protrusion 63; the terminal insulating housing 101 is provided with a third positioning groove 26 corresponding to the third positioning protrusion 63. In the present embodiment, the third positioning protrusion 63 is snapped into the third positioning groove 26 to fix the conductive member 6. The third positioning protrusion 63 may have a dovetail structure.

Further, as shown in fig. 1 and 2, the connection terminal further includes: an operation handle 5 abutting against the spring piece 4; at least two bearing surfaces are arranged on the operating handle 5; along the pulling track of the operating handle 5, each of the at least two bearing surfaces is sequentially flattened with the inner surface of the insulating housing of the terminal, so that the elastic sheet 4 generates different elastic deformations.

Wherein, as shown in fig. 2, the operating handle 5 comprises a holding part 502 and a bearing part 503. As shown in fig. 4 and 7, the insulating housing 101 of the terminal is provided with a through hole 38, and the operating handle 5 penetrates through the through hole 38, so that the holding portion 502 and the bearing portion 503 of the operating handle 5 are respectively located at two sides of the housing 101; the end 501 of the bearing portion 503 abuts against the spring plate 4. The through hole is convenient for the installation of the operating handle, and heat dissipation can be carried out through the through hole when the wiring terminal is in a working state.

As shown in fig. 2, the carrying portion 503 includes two carrying arms 58, and the two carrying arms 58 are disposed on two opposite sides of one end of the hand-holding portion 502, so as to form a U-shaped slot structure; the end parts of the two bearing arms 58 are respectively abutted with the elastic sheet 4; the two carrying arms 58 are each provided with the at least two carrying surfaces.

Further, the through hole 38 is a rectangular hole; a limit rectangular block 35 extending into the through hole 38 and located between the two carrying arms 58 of the operating handle 5 is provided on the insulating housing 101 at one edge of the through hole 38; the opposite surfaces of the two carrying arms 58 are respectively contacted with the opposite side walls of the limit rectangular block 35; the opposite faces of the two carrying arms 58 are respectively in contact with the housing 9 at opposite edges of the through hole 38.

Alternatively, the width of the through hole 38 is larger than the width of the grip portion 502 of the operating handle 5, so that the operating handle 5 is mounted on the insulating housing 101.

Further, as shown in fig. 1, the fixing portion 44a of the spring 4 is fixed to the terminal insulating housing 101.

In another embodiment, as shown in fig. 1, a connection terminal includes: the conductive piece 6 and the spring piece 4; wherein, the conductive member 6 is disposed opposite to the elastic sheet 4, and the external wire is clamped between the conductive member 6 and the elastic sheet 4 by elastic deformation of the elastic sheet 4; the conductive member 6 is provided with a tilting part 62 protruding toward the elastic sheet 4; the raising portion 62 and the free end 4021a of the elastic piece 4 are disposed back and forth along the incoming direction of the external wire.

In this embodiment, the free end and the conductive member form a clamping point, the end of the external wire reaches the tilting portion along the wire-feeding direction L, and then reaches the clamping point, the end of the external wire is clamped at the clamping point under the action of the elastic force of the elastic piece, and when the external wire is pulled by an external force, the friction resistance between the tilting portion and the external wire can increase the required force when the wire is pulled out to a certain extent, so that the external wire is prevented from sliding from the clamping point to a certain extent.

Further, as shown in fig. 8 and 9, the conductive member 6 has a strip-shaped sheet structure; the conductive piece 6 is clamped in the U-shaped slot 21 on the insulating housing 101 of the wiring terminal.

Further, a first positioning protrusion or a first positioning groove is arranged at a first position of the conductive piece, which is in contact with the groove wall of the U-shaped slot 21; and a second positioning groove or a second positioning protrusion which is matched with the first positioning groove is formed in a second position opposite to the first position on the wall of the U-shaped slot 21.

In one possible solution, the long side of the conductive element 6 is provided with a third positioning protrusion 63; a third positioning groove 26 matched with the third positioning protrusion 63 is arranged in the wiring terminal insulating housing 101 at a position corresponding to the third positioning protrusion 63.

In one implementation, the insulating housing 101 includes: a mounting base 2 and an upper cover 3 buckled on the mounting base; wherein, the mounting base 2 is provided with a spring mounting cavity and the U-shaped slot 21 positioned above the spring mounting cavity; the elastic sheet 4 is accommodated in the elastic sheet installation cavity.

In one implementation, the spring plate 4 is a U-shaped structure, and the U-shaped slot 21 is located above the opening side of the U-shaped structure; the mounting base 2 is also provided with a detection groove 25 extending into the spring plate mounting cavity from the edge of the mounting base; the external detection device extends into the spring plate mounting cavity through the detection groove 25 and is contacted with the closed side of the U-shaped structure of the spring plate 4 in the spring plate mounting cavity.

Further, the upper cover 3 of the connecting terminal is provided with a through hole 38, and the operating handle 5 penetrates through the through hole 38, so that the holding part 502 and the bearing part 503 of the operating handle 5 are respectively positioned at the inner side and the outer side of the upper cover 3; the end 501 of the bearing portion 503 abuts against the spring plate 4.

In one implementation, the spring 4 includes a fixing portion 44 and at least two free portions 43, where the at least two free portions 43 are arranged in a straight line along the length direction of the fixing portion 44, and a gap is left between any two adjacent free portions 43.

Further, the upper cover 3 is provided with a wire inlet hole 32 leading to a gap between the different free parts 43 of the spring plate 4 and the conductive piece 6; a blocking wall is provided between two adjacent wire inlet holes 32.

In one possible solution, the opening of the U-shaped slot 21 faces the wire inlet 32, and the conductive member 6 is inserted into the U-shaped slot 21 along the wire inlet direction.

Further, the connection terminal further includes: an operation handle 5 abutting against the spring piece 4; at least two bearing surfaces are arranged on the operating handle 5; along the pulling track of the operating handle 5, each of the at least two bearing surfaces is sequentially flattened against the inner surface of the terminal insulating housing 101, so as to cause different elastic deformations of the spring plate 4.

Further, as shown in fig. 4 and 7, the terminal housing 9 is provided with a through hole 38, and the operating handle 5 penetrates through the through hole 38, so that the holding portion 502 and the bearing portion 503 of the operating handle 5 are respectively located at two sides of the housing 9; the end 501 of the bearing portion 503 abuts against the spring plate 4. The through hole is convenient for the installation of the operating handle, and heat dissipation can be carried out through the through hole when the wiring terminal is in a working state.

Further, as shown in fig. 2, the carrying portion 503 includes two carrying arms 58, and the two carrying arms 58 are disposed on two opposite sides of one end of the holding portion 502, so as to form a U-shaped slot structure; the end parts of the two bearing arms 58 are respectively abutted with the elastic sheet 4; the two carrying arms 58 are provided with the at least two carrying surfaces.

Further, the through hole 38 is a rectangular hole; a limit rectangular block 35 extending into the through hole 38 and located between two carrying arms 58 of the operating handle 5 is provided on the housing 9 at one edge of the through hole 38; the opposite surfaces of the two carrying arms 58 are respectively contacted with the opposite side walls of the limit rectangular block 35; the opposite faces of the two carrying arms 58 are respectively in contact with the opposite edges of the housing 9 located in the through hole 38.

In another embodiment, as shown in fig. 7, 9 and 12, the connection terminal includes a mounting base 2, an upper cover 3, and at least two operation handles 5. The upper cover 3 is buckled on the installation base 3, a conductive piece 6 and an elastic piece 6 are arranged in a cavity formed by the installation base 2 and the upper cover 3, and the elastic piece 6 is abutted to the conductive piece 6. Wherein, the number of the elastic pieces 6 is the same as that of the operation handles 5 and corresponds to one another.

Further, a U-shaped slot 21 is arranged on the mounting base 2; the conductive piece 6 is clamped in the U-shaped slot 21; a first positioning protrusion or a first positioning groove is arranged at a first position of the conductive piece 6, which is contacted with the groove wall of the U-shaped slot 21; and a second positioning groove or a second positioning protrusion which is matched with the U-shaped slot is arranged at a second position opposite to the first position on the slot wall of the U-shaped slot.

For example: fig. 10 shows that a first positioning protrusion 61 is provided at a first position of the conductive member 6 contacting with a groove wall of the U-shaped slot 21, and a second positioning groove (not shown) for matching with the first positioning protrusion 61 is provided at a second position opposite to the first position on the groove wall of the U-shaped slot 21.

The first position where one of the two ends of the conductive member 6 contacts the wall of the U-shaped slot 21 has a first area and a second area, where the first area and the second area are respectively located at two opposite sides where the conductive member 6 contacts the wall of the U-shaped slot 21. In a specific implementation, the first positioning protrusion or the first positioning groove may be selectively provided in the first area and/or the first positioning protrusion or the first positioning groove may be provided in the second area. In one possible technical solution, the first positioning protrusion may be disposed in a first area and the first positioning groove may be disposed in the second area.

In one possible solution, the mounting base 2 is provided with a spring mounting cavity and the U-shaped slot 21 above the spring mounting cavity; the elastic sheet 4 is accommodated in the elastic sheet installation cavity.

In one possible solution, the opening of the U-shaped slot 21 faces the wire inlet 32, and the conductive member 6 is inserted into the U-shaped slot 21 along the wire inlet direction. Further, at least two raising parts 62 protruding toward the elastic sheet 4 are provided on the conductive member 6, and the at least two raising parts 62 are in one-to-one correspondence with free ends 4021a of at least two free parts of the elastic sheet 4; the raising portion 62 and the free end 4021a corresponding thereto are disposed back and forth along the incoming direction of the external lead. The raising portion 62 facilitates positioning of the spring 4 during assembly and increases the force required for pulling out the external lead.

In one possible technical solution, the conductive element 6 is in a strip-shaped sheet structure. A long side of the conductive member 6 is provided with a third positioning protrusion 63; the binding post mounting base 2 is provided with a third positioning groove 26 matched with the third positioning protrusion 63 at a position corresponding to the third positioning protrusion 63. The third positioning protrusion 63 is snapped into the third positioning groove 26 to fix the conductive member 6. The third positioning protrusion 63 may have a dovetail structure.

Further, as shown in fig. 5 and 6, the elastic sheet 4 includes a fixed portion 44 and a free portion 43; the fixed part 44 and the free part 43 are connected and have a U-shaped structure; the free portion 44 includes: an electrical connection section 4021, an arcuate section 4022 connecting the fixing portion, and an intermediate section 4023 disposed between the electrical connection section 4021 and the arcuate section 4022; the intermediate section 4023 abuts the operating handle 5. The operating handle 5 is pulled, and the end 53 of the bearing part 503 of the operating handle 5 abuts against the middle section 4023, so that the free part 402 of the elastic sheet 4 is elastically deformed. A wire connection position 100 is formed between the free end 4021a of the free part 43 and the conductive member 6, and the wire connection position 100 can be conveniently positioned when the elastic piece 4 is assembled.

As shown in fig. 9, a first limiting piece 41a and a second limiting piece 41b extend from the first pressing piece 4023b and the second pressing piece 4023c toward the electrical connection section 4021. The angle between the first limiting piece 41a and the second limiting piece 41b and the middle section 4023 is smaller than the angle between the electric connection section 4021 and the middle section 4023. As shown in fig. 5, the first limiting piece 41a and the second limiting piece 41b have an equal angle with the middle section 4023 and an obtuse angle, and the electrical connection section 4021 and the middle section 4023 have an obtuse angle. The mounting base 2 is provided with a first positioning baffle 24a and a second positioning baffle 24b which are respectively opposite to the first limiting plate 41a and the second limiting plate 41b, an arc-shaped part 4022 of the elastic sheet 4, which is used for connecting the fixing part 44 and the free part 43, is located between the first positioning baffle 24a and the second positioning baffle 24b, and the distance between the first positioning baffle 24a and the second positioning baffle 24b is equal to the width of the arc-shaped part 4022. The first pressing piece 4023b, the first limiting piece 41a and the first positioning blocking piece 24a form a U-shaped groove structure to limit the end part of the corresponding bearing arm 58 to move in the U-shaped groove, and the second pressing piece 4023c, the second limiting piece 41b and the second positioning blocking piece 24b form a U-shaped groove structure to limit the end part of the corresponding bearing arm 58 to move in the U-shaped groove so as to avoid slipping failure.

The upper cover 3 is provided with wire inlet holes 32 which lead to the gap between the different free parts 43 of the elastic sheet 4 and the conductive piece 6; a blocking wall is provided between two adjacent wire inlet holes 32. The number of the wire inlet holes 32 is consistent with that of the wire connecting positions 32, the wire inlet holes 32 are in one-to-one correspondence, the wire inlet holes 32 are arranged on the end face of the upper cover 3 below the handheld part 502 when the operating handle 5 is in the initial position, the wire inlet holes 32 are opposite to the wire connecting positions 100 inside the wire connecting terminals, and an external wire is inserted into the wire connecting positions 100 through the wire inlet holes 32.

In another embodiment, the through hole 38 on the upper cover 3 is a rectangular hole; a limit rectangular block 35 extending into the through hole 38 and located between two carrying arms 58 of the operating handle 5 is arranged on the upper cover 3 at one edge of the through hole 38; the opposite surfaces of the two carrying arms 58 are respectively contacted with the opposite side walls of the limit rectangular block 35; the opposite faces of the two carrying arms 58 are respectively in contact with the upper cover 3 at opposite edges of the through hole 38 to limit the movement of the two carrying arms in the gap between the limit rectangular block edge and the through hole edge.

In another embodiment, as shown in fig. 4, 7 and 19, the upper cover 3 is provided with a reinforcing rib 36 at the edge of the through hole 38 contacting with the two carrying arms 58 of the operating handle 5. The lower surface 36a of the stiffener 36 is flush with one of the at least two bearing surfaces. For example, the at least two bearing surfaces include a long plane 60 and a short plane 59, and the lower surface 36a of the stiffener 36 is flush with the long plane 60 or the short plane 59. When the hand-held portion 502 is in the initial position, the long plane 60 is flat against the lower surface 36a of the stiffener 36; when the hand-held portion 502 is in the extreme position, the short flat surface 59 is flush with the lower surface 36a of the stiffener 36. Optionally, the upper surface of the stiffener 36 is provided with a groove penetrating through the stiffener 36, so as to avoid the appearance of the stiffener from being affected by the dent formed by shrinkage.

Alternatively, the thickness of the reinforcing rib between the adjacent two of the at least two operating handles is greater than the reinforcing rib outside the at least two operating handles to increase the strength of the reinforcing rib between the adjacent two operating handles.

In another embodiment, a first clamping groove or a first buckle may be provided on a plurality of end surfaces of the upper cover 3, a second buckle or a second clamping groove is provided at a corresponding position of the mounting base 2, and the mounting base 2 and the upper cover 3 are packaged by buckling the clamping grooves and the buckles, so as to ensure integrity and stability of the whole wiring terminal.

As shown in fig. 9, 11 and 13, the upper cover 3 is provided with a first clamping groove 31 on the left and right end faces of the incoming line direction L and the opposite end faces of the end face provided with the wiring hole, a first clamping buckle 39 is arranged below the end face provided with the wiring hole, and the mounting base 2 is provided with a second clamping buckle 22 matched with the first clamping groove 31 and a second clamping groove 23 matched with the first clamping buckle 39 in corresponding positions, so that the integrity and stability of the whole wiring clamp are packaged well.

In another embodiment, at least one anti-slip bump (not shown) is disposed on the outer side of the left and right end surfaces of the upper cover 3 and/or the mounting base 2 in the incoming direction L of the external wire.

In an realizable technical scheme, the left and right end faces outside of the upper cover 3, which is located in the wire inlet direction L of the external wire, are provided with at least one first anti-slip bump, the left and right end faces outside of the mounting base 2, which is located in the wire inlet direction L of the external wire, are provided with at least one second anti-slip bump, the numbers of the first anti-slip bumps and the second anti-slip bumps are the same and correspond to each other one by one, and the corresponding first anti-slip bumps and second anti-slip bumps are contacted when the upper cover is buckled on the mounting base, and form a second anti-slip flange.

In another embodiment, a first identification protrusion structure may be further disposed on the bottom outer surface of the mounting base 2, where the first identification protrusion structure is used to identify a distance between a wiring hole and a corresponding wiring location, and a user may refer to the distance when inserting an external wire into the wiring hole of the wiring terminal. For example: as shown in fig. 14, the first logo protruding structure 1401 includes two opposite-back arrows on the same line, the arrows point to be parallel to the incoming line direction of the external wire, the opposite-back arrows start from the position where the wire hole is located and end to the position where the wire is located, and a distance value set at the middle interval of the opposite-back arrows, for example: the diagram shows that the distance between the wiring hole and the corresponding wiring position is 14 (the unit is millimeter), a second identification bulge structure is arranged on one of two end faces connected with the first end face on the upper cover, and the identification bulge structure is used for identifying the wire inlet direction of an external wire, the pulling gear of the operating handle and the switching direction among the pulling gears.

As shown in fig. 1, in the initial state, the free end 4021a of the elastic piece 4 abuts against the conductive member 6. As shown in fig. 15, when the wire 200 is connected, the wire 200 is inserted into the connection hole 32 of the insulating case 101, and the tip of the wire is pushed up against the elastic piece 4, and then is clamped by the free end 4021a of the elastic piece 4 and the tilting portion 62 of the conductive piece 6. As shown in fig. 16 and 17, when the wire 200 needs to be removed, the operation handle 5 is pulled, and the end 501 of the operation handle 5 moves downward due to the cam structure, so that the elastic sheet 4 is pressed, the free end 4021a of the elastic sheet 4 is opened, and the wire 200 is loosened.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A terminal block, comprising: the device comprises a conductive piece, a spring piece, an operating handle and an insulating shell; the elastic sheet is accommodated in the insulating shell; wherein,

The conductive piece is arranged opposite to the elastic piece, and an external lead is clamped between the conductive piece and the elastic piece through elastic deformation of the elastic piece;

The conductive piece is of a strip-shaped sheet structure;

The elastic sheet comprises at least two free parts which generate elastic deformation, and the at least two free parts are distributed along the length direction of the strip-shaped sheet structure;

The end part of the operating handle is abutted with the elastic sheet;

The operating handle is provided with two bearing surfaces;

Along the pulling track of the operating handle, each of the two bearing surfaces is sequentially flatly attached to the inner surface of the insulating shell so as to enable the elastic sheet to generate different elastic deformations;

When the operating handle is pulled, the bearing surface which is flatly attached to the inner surface of the insulating shell is switched;

the two bearing surfaces comprise: a long plane and a short plane connected to the long plane; the long plane is less distant from the handle end than the short plane.

2. The terminal as set forth in claim 1, further comprising: an insulating housing;

the insulating shell is provided with a U-shaped slot;

The conductive piece is clamped in the U-shaped slot;

a first positioning protrusion or a first positioning groove is arranged at a first position of the conductive piece, which is in contact with the groove wall of the U-shaped slot;

And a second positioning groove or a second positioning protrusion which is matched with the U-shaped slot is arranged at a second position opposite to the first position on the slot wall of the U-shaped slot.

3. The terminal of claim 2, wherein the insulating housing comprises: the upper cover is buckled on the mounting base; wherein,

The mounting base is provided with a spring piece mounting cavity and the U-shaped slot positioned above the spring piece mounting cavity;

The elastic sheet is accommodated in the elastic sheet installation cavity.

4. A terminal according to claim 3, wherein the spring is of a U-shaped configuration, the U-shaped slot being located over an open side of the U-shaped configuration;

The mounting base is also provided with a detection groove extending into the elastic sheet mounting cavity from the edge of the mounting base;

The external detection device extends into the elastic sheet mounting cavity through the detection groove and is contacted with the closed side of the U-shaped structure of the elastic sheet in the elastic sheet mounting cavity.

5. The terminal of claim 4, wherein the upper cover is provided with wire-feeding holes leading to the gap between the different free parts of the spring plate and the conductive member;

and a blocking wall is arranged between two adjacent wire inlet holes.

6. The terminal of claim 5, wherein the opening of the U-shaped slot is oriented toward the wire inlet, and the conductive member is inserted into the U-shaped slot in a wire inlet direction.

7. The terminal of any one of claims 1-6, wherein the spring plate comprises a fixed portion and at least two free portions, the at least two free portions are arranged in a line along a length direction of the fixed portion, and a gap is left between any two adjacent free portions.

8. A terminal as set forth in any one of claims 1 to 6, characterized in that,

The conductive piece is provided with at least two tilting parts protruding towards the elastic piece, and the at least two tilting parts are in one-to-one correspondence with the free ends of the at least two free parts of the elastic piece;

the tilting part and the corresponding free end are arranged back and forth along the incoming line direction of the external lead.

9. The terminal according to any one of claims 1 to 6, wherein a long side of the conductive member is provided with a third positioning protrusion;

And a third positioning groove matched with the third positioning protrusion is formed in the position, corresponding to the third positioning protrusion, of the insulating shell of the wiring terminal.

10. The terminal according to any one of claims 1 to 6, wherein a through hole is provided in the terminal insulating housing, and the operation handle penetrates through the through hole, so that a holding portion and a carrying portion of the operation handle are located on both inner and outer sides of the housing, respectively;

the end part of the bearing part is abutted with the elastic sheet.

11. The terminal of claim 10, wherein the carrying portion includes two carrying arms disposed opposite sides of one end of the handle portion to form a U-shaped slot structure;

the end parts of the two bearing arms are respectively abutted with the elastic sheet;

the two bearing arms are respectively provided with the two bearing surfaces.

12. The terminal of claim 11, wherein the through hole is a rectangular hole;

a limiting rectangular block extending into the through hole and positioned between the two bearing arms of the operating handle is arranged at one edge of the through hole on the insulating shell;

opposite surfaces of the two bearing arms are respectively contacted with two opposite side walls of the limit rectangular block;

the opposite surfaces of the two bearing arms are respectively contacted with the two opposite edges of the shell, which are positioned at the through holes.