Wiring terminal

Abstract

The wiring terminal comprises a shell and an elastic piece in a cavity of the shell, when the wiring terminal is used, an operating piece (such as a screwdriver and an ejector rod) is generally used for applying force to downwards press the end of a clamping part, in the scheme, a protruding part and a baffle are matched to limit the movement range of a tool bit of the screwdriver, for example, the tool bit of the screwdriver slides back and forth to correspondingly abut against the baffle and the protruding part, and therefore the clamping part is clamped. The movement of the tool bit is limited by the baffle and the protruding part, the limiting area for limiting the movement range of the tool bit of the screwdriver is formed between the baffle and the protruding part, the screwdriver is more stable when applying force to press the elastic piece clamping part, and the slipping phenomenon is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of wiring devices, and in particular to a wiring terminal. Background Art

[0002] The wiring terminal is a commonly used device in the electrical field. For example, the patent document with the authorization announcement number CN108028473B discloses a wiring terminal contact element, including a housing and a clamping spring (or spring sheet) in a cavity. The clamping part in the clamping spring cooperates with the cavity wall to clamp the inserted wire. Generally, it is necessary to press the clamping part in the clamping spring with an operating part such as a screwdriver to move it downward, and then pull out the wire or insert the wire. However, the configuration design of the clamping part that cooperates with the screwdriver is unreasonable, and it is easy to slip, which needs to be improved. Summary of the invention

[0003] To solve at least one of the above technical defects, the present invention provides the following technical solutions:

[0004] The present application document discloses a terminal block, comprising a shell and a spring sheet in its cavity, the spring sheet comprising a resting portion, a clamping portion and a bending portion connecting the two, a socket connected to the cavity of the shell is arranged at the end of the shell, the socket is used for inserting a wire, the socket is blocked by the clamping portion in the spring sheet in an initial state, the clamping portion moves downward to release the blockage of the socket, the end of the clamping portion is exposed from the corresponding opening of the shell, and is characterized in that a protruding portion protruding upward and outward is arranged on the top surface of the end of the clamping portion exposed from the opening, a baffle is arranged at the opening in front of the protruding portion, the baffle is at least partially in the cavity of the socket to limit the insertion depth of the wire, and the space between the baffle and the protruding portion forms a limiting area for limiting the range of movement of an operating member pressing the clamping portion.

[0005] When in use, an operating member (such as a screwdriver, a push rod, etc.) is usually used to apply force to press down the end of the clamping portion. In this solution, the protrusion and the baffle plate cooperate to limit the range of movement of the screwdriver bit. For example, the forward and backward sliding of the screwdriver bit corresponds to the abutment of the baffle plate and the protrusion, and the baffle plate and the protrusion limit the movement of the bit. A limiting area that limits the range of movement of the screwdriver bit is formed between the two. When the screwdriver applies force to press the spring clamping portion, it is more stable and the phenomenon of slippage is reduced.

[0006] At the same time, at least part of the baffle is in the hole of the jack, such as the bottom, lower part, middle part, etc. of the baffle are in the hole of the jack, so as to limit the insertion depth of the wire, and the clamping part can better clamp the wire at the jack.

[0007] Furthermore, during the movement of the clamping portion from the initial state to the unlocking socket, the protrusions cooperate with the side walls of the shell on both sides to form a limiting area for limiting the movable range of the operating member pressing the clamping portion. When in use, if the screwdriver bit slides toward the protrusions, the protrusions will limit the sliding of the bit; if the screwdriver bit slides to both sides, the side walls of the shell will limit the sliding of the bit, thereby forming a limiting area for limiting the movable range of the screwdriver bit.

[0008] Furthermore, during the movement of the clamping portion from the initial state to the unlocking socket, the distance between the two sides of the protruding portion and the two sides of the end of the clamping portion and the corresponding side wall of the shell is 0-6mm. In this solution, the spacing width between the two sides of the protruding portion and the corresponding side wall of the shell, as well as the spacing width between the two sides of the end of the clamping portion where the protruding portion is located and the corresponding side wall of the shell are limited to prevent the screwdriver bit from slipping into the gap between the two sides of the protruding portion and the corresponding side wall of the shell, or slipping into the gap between the two sides of the end of the clamping portion and the corresponding side wall of the shell during the pressing process. By limiting the spacing, the protruding portion, the side wall of the shell, etc. cooperate to form a limit area that limits the range of motion of the screwdriver bit, thereby further reducing the phenomenon of slipping.

[0009] Furthermore, the top ends of the shell side walls corresponding to both sides of the protrusion are higher than the top surface of the end of the clamping part in the initial state. When the clamping part is in the initial state, the protrusion cooperates with the shell side walls on both sides to form a limiting area for limiting the movable range of the operating part pressing the clamping part. Under this limiting configuration, even when the screwdriver initially abuts against the end of the clamping part, the sliding range can be limited, which is convenient for use.

[0010] Furthermore, the distance between the two sides of the protruding portion and the two sides of the end of the clamping portion and the corresponding side wall of the shell is 0-3 mm, which is a preferred distance and is suitable for common wiring terminals on the market.

[0011] Furthermore, the opening of the jack is located at the head end of the shell and a mounting port connected to the cavity thereof is provided at the tail end of the shell, the mounting port is used for inserting the spring piece, a notch is provided at the top shell wall of the mounting port to form an opening for exposing the end of the clamping portion, and the mounting port is directly formed in this scheme, the spring piece can be directly inserted from the mounting port, and assembly and molding are convenient. The layout of the formed notch at the top shell wall of the mounting port helps to simplify the shell structure and facilitate molding.

[0012] Furthermore, a notch is also provided at the bottom shell of the installation port, and the width of the notch is greater than the width of the spring piece. The spring piece can be inserted from the installation port without a large degree of pre-compression, thereby reducing the difficulty of assembly.

[0013] Furthermore, a limiting plate is provided at the bottom wall of the cavity of the shell, and a groove for inserting the limiting plate is provided at the abutting portion of the spring sheet. The limiting plate is inserted into the groove to cooperate with limiting the detachment of the spring sheet from the insertion direction, thereby improving the stability of the spring sheet.

[0014] Furthermore, an avoidance hole is arranged in the middle of the clamping part corresponding to the baffle, and the bottom end of the baffle arranged at the opening in the initial state extends into the avoidance hole. The avoidance hole is added to meet the placement requirements of the baffle, and the reasonable layout helps to simplify the structure.

[0015] Furthermore, the clamping portion includes a main body section and a V-shaped section connecting the bent portion and the main body section, the tip of the V-shaped section faces the abutment portion, the upward inclined section of the V-shaped section is in the cavity of the socket and faces the orifice of the socket, and a protrusion is arranged on the top surface of the tail end of the main body section. The addition of the V-shaped section helps to increase the deformation angle of the spring piece, which helps to reduce the plastic deformation caused by overpressure during the frequent pressing operation at the end of the clamping portion, and helps to increase the service life of the spring piece.

[0016] As for the protrusion, it can be fixed at the tail end of the main body section after being independently formed, or the tail end of the main body section can be directly bent upward to form the protrusion, which can be selected according to needs.

[0017] Furthermore, the hole opening of the jack is flared, and the width of the hole adjacent to the hole opening is smaller than the width of the spring. The flared hole opening facilitates the insertion of the wire. Under normal circumstances, the diameter of the wire is smaller than the width of the spring. In this solution, the width of the hole opening of the jack is limited to limit the movement of the wire, which helps to improve the stability of the connection between the wire and the spring.

[0018] Furthermore, the shell is rectangular in shape, and a convex bump is provided on the top surface wall of the socket, so that the convex bump abuts against the clamping part. Adding the convex bump helps to improve the structural strength, and the method of supporting the clamping part with the convex bump helps to extend the service life of the shell.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention designs the structure of the terminal block, and the protrusion at the end of the clamping portion and the baffle limit the forward and backward sliding range of the screwdriver bit. When the screwdriver bit is in the limit area and force is applied, it can reduce the possibility of slipping, which is convenient for use.

[0021] 2. The structure of the terminal block designed in the present invention forms a limit area with the protrusion and the corresponding housing side wall to limit the sliding range of the screwdriver bit, which helps to further reduce the slipping phenomenon.

[0022] 3. The present invention forms a mounting port and an opening at the end of the shell, and the spring piece can be directly inserted for installation without a large degree of pre-compression, which is convenient for assembly and molding.

[0023] 4. The configuration of the spring piece designed in the present invention helps to increase the elastic deformation angle of the clamping portion. Even if the clamping portion is pressed frequently, the plastic deformation caused by overpressure can be reduced, which helps to increase the service life of the spring piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 is a schematic diagram of the cross-sectional structure of the wiring terminal in Example 1;

[0026] Figure 2 is a schematic diagram of the cross-sectional structure of the wiring terminal in Example 1;

[0027] Figure 3 is a schematic diagram of the structure of the wiring terminal in Example 1;

[0028] Figure 4 is a schematic diagram of the structure of the wiring terminal in Example 1;

[0029] Figure 5 is a schematic diagram of the structure of the shrapnel in Example 1;

[0030] Wherein, the accompanying drawings are marked as follows:

[0031] 1. Shell; 2. Spring piece; 3. Raised portion; 10. Mounting port; 11. Insertion hole; 12. Opening; 13. Notch; 14. Limiting plate; 15. Baffle; 16. Plate body; 17. Bump; 21. Clamping portion; 22. Abutting portion; 23. Bend portion; 111. Orifice; 121. Side wall; 210. Main body section; 211. V-shaped section; 212. Avoidance hole; 221. Groove; 2111. Upward inclined section. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0033] Example 1

[0034] like Figure 1-Figure 5 As shown, in this example, a terminal comprises a housing 1 and a spring 2 in a cavity thereof, wherein the configuration of the housing can be selected according to the requirements. In this example, a common rectangular box shape is used as an example for demonstration, wherein the housing 1 contains a cavity, and the spring 2 is in the cavity. A socket 11 is formed at the head end of the housing 1, and the cavity of the socket 11 is connected to the cavity of the housing 1. The opening 111 of the socket 11 is located at the end face of the head end of the housing 1, and the wire is inserted from the opening 111 of the socket 11. Preferably, the opening 111 of the socket 11 is in an expanded shape, and the width of the cavity adjacent to the opening 111 is smaller than the width of the spring, such as Figure 3 , Figure 4As shown, the plates 16 on both sides of the shell can be bent to surround the front of the jack, and then the ends of the plates 16 are bent outward to form a flared opening. The flared opening facilitates the insertion of the wire, and the movement of the wire can be further restricted by limiting the width of the hole of the jack, thereby improving the stability of the connection between the wire and the spring.

[0035] As for the spring sheet, the spring sheet 2 is formed of a common elastic conductive metal, including a contact portion 22, a clamping portion 21 and a bending portion 23 connecting the two, the bending portion 23 is a common U-shaped, and the contact portion 22 abuts against the cavity bottom wall of the housing 1. Figure 1 , Figure 2 In the initial state shown, the clamping portion 21 of the spring 2 is partially in the hole of the jack 11 to block the jack. When the wire is inserted, the clamping portion needs to be bent and moved downward to make enough space for the wire to be inserted (i.e., the blockade of the jack is removed), and then the reset clamping portion cooperates with the cavity wall to clamp the wire in the middle.

[0036] The end of the clamping portion 21 is exposed from the corresponding opening 12 of the shell 1. The position of the opening, such as at the middle top surface of the shell, at the top surface of the rear end of the shell, etc., can be selected according to needs. Preferably, the configuration shown in this example is that the opening 12 is located at the top surface of the rear end of the shell 1. A protruding portion 3 convexly facing upward is arranged on the top surface of the end of the clamping portion 21 exposed from the opening 12. The protruding portion 3 can be independently formed and then fixed on the top surface of the end of the clamping portion, or it can be integrally formed with the clamping portion. The configuration of the protruding portion can also be selected according to needs, such as Figure 3 , Figure 4 , Figure 5 The straight extension type shown can of course also be a curved extension or other configurations. The purpose of the raised portion is to limit the forward movement of the bit when the screwdriver bit applies force to press the clamping portion downward.

[0037] In this example, a baffle 15 is formed at the opening in front of the protrusion 3, such as a baffle formed at the opening wall, and the baffle can be in a flat plate, cylindrical, triangular or other configurations. Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the baffle 15 is approximately L-shaped, and the transverse portion of the baffle 15 is connected to the shell wall at the opening 12, such as being integrally formed. The length of the transverse portion can be adjusted, and the position of the longitudinal portion can be adjusted, which can better limit the insertion depth of the wire and also help simplify the shell structure. Of course, the baffle can also be directly selected as a flat plate, and the top can be connected to the shell wall at the opening. The bottom of the longitudinal end of the baffle 15 extends into the hole cavity in the jack 11, and the wire abuts the longitudinal end of the baffle when the jack moves forward, thereby limiting the wire from continuing to be inserted, and the clamping portion can better clamp the wire at the jack.

[0038] At the same time, the space between the longitudinal end of the baffle 15 and the raised portion 3 forms a limit zone for limiting the range of movement of the operating member. For example, when the blade of a screwdriver is inserted into the space between the two, the forward and backward sliding of the blade will correspondingly abut the longitudinal end of the baffle 15 and the raised portion 3 to form a limit, which helps to reduce the phenomenon of slipping.

[0039] To facilitate the placement of the baffle and simplify the structure, a hole, namely the avoidance hole 212, is formed in the middle of the corresponding clamping portion 21 in this example. In the initial state, the bottom end of the baffle 15 at the opening extends into the avoidance hole 212. This configuration does not affect the installation of the spring.

[0040] To further limit slipping, further restrictions may be made as follows: during the movement of the clamping portion 21 from the initial state to the unlocking socket 11, the protrusion 3 cooperates with the side walls of the shell 1 on both sides to form a limit zone for limiting the range of motion of the operating member pressing the clamping portion, such as limiting the distance between the two sides of the protrusion and the corresponding side walls of the shell, to prevent the screwdriver bit from slipping in. Preferably, during the movement of the clamping portion from the initial state to the unlocking socket, the distance between the two sides of the protrusion 3 and the two sides of the end of the clamping portion and the corresponding side walls of the shell is 0-6mm, preferably 0-3mm. Under this restriction, the screwdriver bit cannot slide into the gap between the two sides of the protrusion and the corresponding side walls of the shell, or slide into the gap between the two sides of the end of the clamping portion and the corresponding side walls of the shell during the pressing process, so that the protrusion cooperates with the side walls of the shell on both sides to limit the sliding range of the bit, so as to further reduce the phenomenon of slipping.

[0041] In addition, the height of the shell side walls on both sides of the opening can be restricted when the clamping part is in the initial state. For example, in the initial state, the top ends of the shell side walls 121 corresponding to the two sides of the protrusion 3 are higher than the top surface of the end of the clamping part 21, such as higher than the bottom end of the protrusion 3. Of course, it can also continue to extend beyond the protrusion. The distance between the two sides of the end of the clamping part and the two sides of the protrusion and the corresponding shell side walls is preferably within 0-6mm, 0-3mm, so that a limit can be formed during the insertion of the screwdriver bit, which is convenient for use.

[0042] For the convenience of assembly, in this example, a mounting port 10 connected to the inner cavity of the housing 1 is formed at the rear end, and the size of the mounting port 10 satisfies the insertion of the spring under the pre-stressed state. A notch is formed at the top shell wall of the mounting port 10, and the width of the notch is greater than the width of the spring, that is, the opening 12 through which the end of the clamping portion is exposed. The layout in which the opening is directly formed at the mounting port helps to increase the size of the mounting port, and the spring can be inserted under a relatively small degree of pre-stress. Of course, a notch 13 can also be formed at the bottom shell wall of the mounting port 10, and the width of the notch is greater than the width of the spring. Under this configuration, the longitudinal size of the mounting port is greatly increased, and the pre-stress of the spring can be further reduced, which facilitates the insertion of the spring from the mounting port.

[0043] In order to improve the stability of the spring piece, a limiting plate 14 may be added to the bottom wall of the cavity of the housing 1, such as Figure 1 , Figure 2 As shown, a limit plate 14 is bent and formed at the bottom wall of the shell cavity 1 below the insertion hole 11. The limit plate 14 is in the shape of a plate inclined away from the mounting port 10. A groove 221 for inserting the limit plate is formed at the abutment portion 22 of the spring sheet 2. After the spring sheet is inserted into the shell cavity, the limit plate 14 is inserted into the groove 221, and the outward pulling of the spring sheet 2 is limited.

[0044] In addition, in order to further increase the deformation angle of the clamping portion in the spring sheet, the configuration of the clamping portion is designed in this example, such as Figure 1 , Figure 2 , Figure 5 As shown, the clamping portion 21 includes a main body section 210 and a V-shaped section 211 connecting the bending portion 23 and the main body section 210. The tip of the V-shaped section 211 faces the abutting portion 22. The upward inclined section 2111 (i.e., the portion extending upward) of the V-shaped section 211 extends into the cavity of the jack 11 and faces the orifice 111 of the jack 11. The tail end of the main body section 210 is bent upward to form a protrusion 3 protruding from the top surface. The upward inclined section 2111 blocks the jack 11. When the wire is inserted, the wire abuts the upward inclined section. Guided by the inclined surface, the wire can better move down the clamping portion to unlock during continued insertion. And under this configuration, the deformation angle of the tail end of the main body section is increased, and the overpressure phenomenon caused by the force of the screwdriver is reduced, which in turn helps to increase the service life of the shrapnel. For the main body section, its configuration can also be selected according to needs, preferably as follows Figure 1 , Figure 2 , Figure 5 As shown, the body section extends approximately in a straight line, and is partially upturned at the position where it abuts the outer protrusion. The avoidance hole 212 is formed at the body section 210.

[0045] In addition, a convex hump 17 can be formed on the top surface wall of the socket 11. The top surface of the shell 1 corresponding to the convex hump 17 is groove-shaped. In the initial state, the convex hump 17 abuts against the main body section in the clamping part. Adding the convex hump helps to improve the structural strength, reduce the damage to the shell caused by the resetting of the clamping part, and extend the service life of the shell.

[0046] The above are only preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A terminal block, comprising a housing (1) and a spring sheet (2) in a cavity thereof, the spring sheet (2) comprising a contact portion (22), a clamping portion (21) and a bent portion (23) connecting the two, an insertion hole (11) communicating with the cavity of the housing (1) is provided at the end of the housing (1), the insertion hole (11) being used for inserting a wire, the clamping portion (21) in the spring sheet (2) blocking the insertion hole (11) in an initial state, the clamping portion (21) moves downward to release the blocking of the insertion hole (11), and the end of the clamping portion (21) is exposed from a corresponding opening (12) of the housing (1), characterized in that: A protruding portion (3) protruding upward is provided at the top surface of the end of the clamping portion (21) exposed from the opening (12), and a baffle (15) is provided at the opening in front of the protruding portion (3). The baffle (15) is at least partially located in the cavity of the plug hole (11) to limit the insertion depth of the wire, and the space between the baffle (15) and the protruding portion (3) forms a limiting area for limiting the range of movement of an operating member for pressing the clamping portion.

2. A terminal block according to claim 1, characterized in that: During the movement of the clamping portion (21) from the initial state to the unlocking socket (11), the protrusions (3) cooperate with the side walls of the shell (1) on both sides to form a limiting area for limiting the range of movement of the operating member pressing the clamping portion.

3. A terminal block according to claim 2, characterized in that: During the movement of the clamping portion (21) from the initial state to the unlocking socket (11), the distance between the two sides of the protruding portion (3) and the two sides of the end of the clamping portion (21) and the corresponding side wall of the housing (1) is 0-6 mm.

4. A terminal block according to claim 3, characterized in that: The top ends of the side walls of the shell (1) corresponding to the two sides of the protruding portion (3) are higher than the top surface of the end of the clamping portion (21) in the initial state. When the clamping portion (21) is in the initial state, the protruding portion (3) cooperates with the side walls of the shell (1) on both sides to form a limiting area for limiting the range of movement of the operating member pressing the clamping portion; Alternatively, the distance between the two sides of the protruding portion (3) and the two sides of the end of the clamping portion (21) and the corresponding side wall of the shell (1) is 0-3 mm.

5. A terminal block according to claim 1, characterized in that: The orifice (111) of the insertion hole (11) is located at the head end of the shell (1), and a mounting opening (10) communicating with the inner cavity of the shell (1) is provided at the tail end of the shell (1), the mounting opening (10) being used for inserting the spring piece, and a notch is provided at the top shell wall of the mounting opening (10) to form an opening (12) for exposing the end of the clamping portion.

6. A terminal block according to claim 5, characterized in that: A notch (13) is also provided at the bottom shell of the installation opening (10), and the width of the notch is greater than the width of the spring sheet.

7. A terminal block according to claim 1, characterized in that: A limiting plate (14) is arranged at the bottom wall of the cavity of the shell (1), and a groove (221) for inserting the limiting plate (14) is arranged at the abutting portion (22) of the spring sheet (2). The limiting plate (14) is inserted into the groove (221) to cooperate with limiting the detachment of the spring sheet (2) from the insertion direction.

8. A terminal block according to claim 1, characterized in that: An avoidance hole (212) is arranged in the middle of the clamping portion (21) corresponding to the baffle (15), and the bottom end of the baffle (15) arranged at the opening in the initial state extends into the avoidance hole (212).

9. A terminal block according to claim 1, characterized in that: The clamping portion (21) comprises a main body section (210) and a V-shaped section (211) connecting the bent portion (23) and the main body section (210); the tip of the V-shaped section (211) faces the abutment portion (22); an upward inclined section (2111) of the V-shaped section (211) is located in the cavity of the insertion hole (11) and faces the orifice (111) of the insertion hole (11); and a protrusion (3) is provided on the top surface of the tail end of the main body section (210).

10. A terminal block according to claim 1, characterized in that: The opening (111) of the insertion hole (11) is in an expanded shape, and the width of the cavity adjacent to the opening (111) is smaller than the width of the spring sheet (2); Alternatively, the housing (1) is rectangular in shape, a convex bump (17) is provided on the top surface wall of the insertion hole (11), and in an initial state, the convex bump (17) abuts against the clamping portion (21).

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