Wiring terminal
Patent Information
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- NINGBO SUPU ELECTRONICS
- Filing Date
- 2024-07-09
- Publication Date
- 2026-06-24
Smart Images
Figure IMGAF001_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present invention relates to the technical field of terminal blocks, and in particular, to a terminal block.BACKGROUND
[0002] A terminal block is connection fitting that connects a wire joint. The terminal block usually includes an insulating shell, an elastic piece and a conductor. One end of the elastic piece is connected with the conductor, and the other end of the elastic piece is matched with the conductor by means of the elastic force of the elastic piece to press against the wire joint. During wiring operation, a wiring operator first peels off an insulating layer of a wire, then exposes the joint of the wire, and then inserts the joint of the wire into a wiring hole of the terminal block, and the elastic piece and the conductor clamps the joint of the wire.
[0003] However, during use of an existing terminal block, since the wiring hole of the terminal block has a confined operation space, when the joint of the wire is inserted into the wiring hole, it is inconvenient for the wiring operator to directly observe the connection between the wire and the terminal block from a side of the terminal block, and it is easy for the elastic piece and the conductor to pinch the insulating layer of the wire, resulting in poor contact between the joint of the wire and the conductor, and unreliable abutting between the elastic piece and the joint of the wire, which brings inconvenience to the wiring operation and affects the wiring efficiency.SUMMARY
[0004] An object of the present invention is to design a terminal block to address the above technical deficiencies, where a wiring operator can directly observe the connection of a wire from an assembly side of the terminal block through an observation port, thereby facilitating wiring operation and improving the wiring efficiency.
[0005] In order to solve the above technical problems, the technical solution of the present invention is as follows: a terminal block includes: an insulating shell, where one side of the insulating shell is provided with an assembly cavity, the insulating shell is provided with at least one wiring hole, a threading port through which a wire passes is formed in communication between the wiring hole and the assembly cavity, and the insulating shell is provided with a wire port wall at a position corresponding to the threading port; a limiting structure, where the limiting structure is fixed in the assembly cavity, the limiting structure includes a baffle portion and a supporting portion, a first positioning space is formed between an edge portion of the baffle portion and an inner wall of the assembly cavity corresponding thereto, a swing space is formed between an inner side wall of the baffle portion and the inner wall of the assembly cavity, a second positioning space is formed between the supporting portion and the inner wall of the assembly cavity corresponding thereto, and the baffle portion is spaced apart from the wire port wall to form an observation port therebetween; a conductive frame, where an abutting section is provided on the conductive frame, and the abutting section is at least partially arranged in the first positioning space; and an elastic piece, where the elastic piece includes a clamping section, a centering section and a positioning section connected to each other, the centering section is mounted in the second positioning space when the elastic piece is bent into the assembly cavity for assembly, and the clamping section cannot pass through the observation port, and the assembled clamping section and the abutting section form a state of abutting against each other or a state of being separated from each other to allow the wire to be clamped therebetween or removed.
[0006] Preferably, a gap between the baffle portion and the wire port wall at least at one place is smaller than a thickness of the abutting section, so that the clamping section cannot pass through the observation port.
[0007] Alternatively, the insulating shell is further provided with a wire port interference portion protruding relative to the wire port wall, and when the elastic piece is assembled into the assembly cavity, the wire port interference portion drives the clamping section to be biased downward so that the clamping section cannot pass through the observation port.
[0008] Alternatively, the insulating shell further has an upper baffle extending downwardly along the wire port wall, the observation port is formed between opposite sides of the upper baffle and the baffle portion, so that the clamping section cannot be assembled through the observation port but is bent by the elastic piece to be assembled into the assembly cavity.
[0009] Preferably, when the gap between the baffle portion and the wire port wall at least at one place is smaller than the thickness of the abutting section, a baffle interference portion is provided at a top end of the baffle portion, the baffle interference portion is an inclined block or a bump, and a distance between the baffle interference portion and the wire port wall is smaller than the thickness of the abutting section.
[0010] Preferably, when the insulating shell is provided with the wire port interference portion, the wire port interference portion is arranged to protrude downward and extend along the wire port wall, or the wire port interference portion is arranged in the assembly cavity and located below the wire port wall.
[0011] Preferably, a baffle interference portion is provided at a top end of the baffle portion, the baffle interference portion is an inclined block or a bump, and the baffle interference portion is arranged on a side close to the wire port interference portion, and a distance between the baffle interference portion and the wire port interference portion is smaller than the thickness of the abutting section.
[0012] Preferably, when the insulating shell is provided with an upper baffle, a length of the upper baffle is 40% to 80% of a length of the swing space.
[0013] Preferably, an inner wall of the baffle portion is provided with a connecting plate, the connecting plate extends inward and is fixedly connected to the inner wall of the assembly cavity, and a bottom of the connecting plate protrudes outward to form a positioning block, and the conductive frame is provided with a positioning groove for inserting the positioning block.
[0014] Preferably, the connecting plate is provided with an extension arm, the extension arm extends toward an inner side of the assembly cavity and is fixedly connected to the inner wall of the assembly cavity, an assembly space is formed between the baffle portion and the extension arm, so that the clamping section penetrates into the assembly space to be bent by the elastic piece to be assembled into the assembly cavity.
[0015] Preferably, a width of the baffle portion is smaller than an inner diameter of the threading port.
[0016] Preferably, the terminal block further includes a drive key, the insulating shell is provided with a sliding hole at a position close to the wiring hole, the drive key is slidably connected in the sliding hole, and a bottom of the drive key abuts against the clamping section.
[0017] Compared with the prior art, the present invention has the following beneficial effects: with regard to the terminal block of the present invention, the clamping section and the positioning section are brought close to each other by applying pressure to the elastic piece, so that the elastic piece is assembled into the assembly cavity in a bent manner. During assembly of the elastic piece, the observation port formed between the baffle portion and the wire port wall interferes with penetration of the clamping section of the elastic piece into the swing space to ensure that the clamping section is assembled into the swing space in a correct way, thereby avoiding damage to the observation port by the clamping section due to wrong mounting of the elastic piece. When the centering section is inserted into the first positioning space, the elastic piece is released to return to an original shape to drive the clamping section to swing around the supporting portion in the swing space. During the wiring operation, the wiring operator can directly observe the connection of the wire from the assembly side of the terminal block through the observation port, which facilitates wiring operation and improves wiring efficiency.BRIEF DESCRIPTION OF THE DRAWINGS
[0018] FIG. 1 is a first schematic structural diagram of a terminal block according to a first embodiment; FIG. 2 is a second schematic structural diagram of the terminal block according to the first embodiment; FIG. 3 is an enlarged view of region A in FIG. 2; FIG. 4 is a schematic structural diagram of a terminal block according to another embodiment of a baffle interference portion in the first embodiment; FIG. 5 is a first cross-sectional view of a wiring diagram according to the first embodiment; FIG. 6 is a second cross-sectional view of the wiring diagram according to the first embodiment; FIG. 7 is a schematic structural diagram of a terminal block according to a second embodiment; FIG. 8 is an enlarged view of region B in FIG. 7; FIG. 9 is a schematic structural diagram of a terminal block according to another embodiment of a baffle interference portion in the second embodiment; FIG. 10 is a schematic structural diagram of an insulating shell according to the second embodiment; and FIG. 11 is a schematic structural diagram of a terminal block according to a third embodiment.
[0019] Reference numerals in the drawings: 1. insulating shell; 101. assembly cavity; 102. wiring hole; 103. threading port; 104. sliding hole; 105. wire port wall; 106. upper baffle; 2. limiting structure; 21. baffle portion; 22. supporting portion; 3. first positioning space; 4. swing space; 5. second positioning space; 61. wire port interference unit; 62. baffle interference portion; 7. observation port; 8. conductive frame; 801. abutting section; 802. positioning portion; 803. positioning groove; 804. slot; 9. elastic piece; 91. clamping section; 92. centering section; 93. positioning section; 10. inclined plane; 11. connecting plate; 12. positioning block; 13. extension arm; 14. assembly space; 15. drive key; 16. butting groove; 17. vertical side wall; and 18. connecting wall.DESCRIPTION OF THE EMBODIMENTS
[0020] The present invention is further described below by way of embodiments with reference to the accompanying drawings.First Embodiment:
[0021] Referring to FIGs. 1 to 6, a terminal block includes an insulating shell 1, two limiting structures 2, two interference structures, a conductive frame 8, two elastic pieces 9 and two drive keys 15, one side of the insulating shell 1 is provided with an assembly cavity 101, an opening side of the assembly cavity 101 is an assembly side of the terminal block, and two side portion of the insulating shell 1 are provided with wiring holes 102, the limiting structures 2, the interference structures, the elastic pieces 9 and the drive keys 15 are distributed at positions of the corresponding wiring holes 102 of the insulating shell 1. A threading port 103 through which a wire passes is formed in communication between the wiring hole 102 and the assembly cavity 101. Preferably, the threading port 103 is composed of two vertical side walls 17 and a connecting wall 18, and the two vertical side walls 17 are vertically distributed on two side portions of the connecting wall 18, and the two vertical side walls 17 and the connecting wall 18 are formed together when the threading port 103 of the insulating shell 1 is formed, so that the threading port 103 is a square port.
[0022] The two limiting structures 2 are symmetrically distributed on both sides of the assembly cavity 101, the limiting structures 2 each include a baffle portion 21 and a supporting portion 22, an inner side wall of a bottom of the baffle portion 21 is provided with a connecting plate 11, and the connecting plate 11 is fixedly connected with an inner wall of the assembly cavity 101, so that a swing space 4 is formed between the inner side wall of the baffle portion 21 and the inner wall of the assembly cavity 101. A first positioning space 3 is formed between an edge portion of the baffle portion 21 and the inner wall of the assembly cavity 101 corresponding thereto, and the first positioning space 3 is L-shaped.
[0023] Both ends of the conductive frame 8 are bent to form abutting sections 801, and the abutting sections 801 and the conductive frame 8 connected thereto are L-shaped. Both ends of the conductive frame 8 are respectively inserted into two first positioning spaces 3, and the inner wall of the assembly cavity 101 is concavely formed with butting grooves 16, and the two first positioning spaces 3 are respectively matched with two side portions of the butting grooves 16, and the butting grooves 16 are in concave-convex fit with an insertion side portion of the conductive frame 8, so that the conductive frame 8 is mounted into the assembly cavity 101, the abutting sections 801 are clamping sides of the conductive frame 8, and the abutting sections 801 correspond to the swing spaces 4. Preferably, a bottom of the connecting plate 11 protrudes outward to form a positioning block 12, and the conductive frame 8 is provided with a positioning groove 803 for inserting the positioning block 12, in order to improve connection stability of the conductive frame 8 in the assembly cavity 101.
[0024] The connecting plate 11 is provided with an extension arm 13, the extension arm 13 extends toward an inner side of the assembly cavity 101 and is fixedly connected to the inner wall of the assembly cavity 101, and an assembly space 14 is formed between the baffle portion 21 and the extension arm 13. The supporting portion 22 is composed of a shaft portion and an extension portion connected to each other, and a second positioning space 5 is formed between the shaft portion of the supporting portion 22 and the inner wall of the assembly cavity 101 corresponding thereto, and the second positioning space 5 is U-shaped.
[0025] The insulating shell 1 is provided with a wire port wall 105 at a position corresponding to the threading port 103, the wire port wall 105 is arranged adjacent to the position of the connecting wall 18, a width of the baffle portion 21 is smaller than an inner diameter of the threading port 103, the baffle portion 21 is spaced apart from the wire port wall 105 to form an observation port 7 therebetween, the observation port 7 extends in a width direction of the baffle portion 21, and the observation port 7 is communicated with the first positioning space 3, so that a wiring operator can comprehensively observe the condition of the wire passing through the threading port 103 through the observation port 7 when threading the wire through the threading port 103.
[0026] The elastic piece 9 includes a clamping section 91, a centering section 92 and a positioning section 93 connected to each other, and the interference structures each include a baffle interference portion 62, the baffle interference portion 62 is integrally formed at a top end of the baffle section 21, the baffle interference portion 62 is an inclined block or a bump, and a distance D1 between the baffle interference portion 62 and the wire port wall 105 is smaller than a thickness D2 of the abutting section 801, ensuring that a gap between the baffle section 21 and the wire port wall 105 at least at one place is smaller than the thickness of the abutting section 801, so that the clamping section 91 cannot pass through the observation port 7. Preferably, the baffle interference portion 62 is an inclined block, a top surface of the inclined block is an inclined plane 10, the observation port 7 formed between the inclined plane 10 and the inner wall of the assembly cavity 101 corresponding thereto is V-shaped, and a minimum gap between the inclined plane 10 and the wire port wall 105 is located at a position where the observation port 7 is far away from the abutting section 801. Referring to FIG. 4, there is still another embodiment of the baffle interference portion 62, and the minimum gap between the inclined plane 10 and the wire port wall 105 thereof is located at a position where the observation port 7 is close to the abutting section 801.
[0027] When the elastic piece 9 is bent into the assembly cavity 101 for assembly, the clamping section 91 and the positioning section 93 of the elastic piece are brought close to each other by applying pressure to the elastic piece 9, so that the elastic piece 9 is assembled into the assembly cavity 101 in a bent manner. In this process, the centering section 92 is mounted in the second positioning space 5, and a tail end of the positioning section 93 abuts against the positioning section 802 under the restriction of the extension portion of the support part 22 and the inner wall of the assembly cavity 101 corresponding thereto, and the observation port 7 formed between the baffle portion 21 and the wire port wall 105 interferes with penetration of the clamping section 91 of the elastic piece 9 into the swing space 4 to ensure that the clamping section 91 is assembled into the swing space 4 in a correct manner, so that the clamping section 91 penetrates into the assembly space 14 and is bent by the elastic piece 9 to be assembled into the assembly cavity 101, thereby avoiding damage to the observation port 7 by the clamping section 91 due to wrong mounting of the elastic piece 9, and the extension arm 13 restricts the degree of bending of the elastic piece 9 relative to an inner side wall of the swing space 4 to avoid excessive bending of the elastic piece 9. After the elastic piece 9 is assembled into the assembly cavity 101, the elastic piece 9 may be released to return to an original shape to drive the clamping section 91 passing through the assembly space 14 to swing around the supporting portion 22 in the swing space 4, the clamping section 91 cannot pass through the observation port 7, which can prevent the clamping section 91 that swings in the swing space 4 from disengaging outward through the observation port 7 until the clamping section 91 and the abutting section 801 form a state of abutting against each other, completing the assembly operation of the elastic piece 9.
[0028] The insulating shell 1 is provided with a sliding hole 104 at a position close to the wiring hole 102, an inner hole wall of the sliding hole 104 is in concave-convex fit with an outer wall of the drive key 15, so that the drive key 15 can slide up and down along an axial direction of the sliding hole 104. An upper portion of the drive key 15 is located at an opening position of the sliding hole 104, and a bottom portion of the drive key 15 extends into the assembly cavity 101 and abuts against an upper surface of the clamping section 91. The wiring operator can press the drive key 15 to cause the clamping section 91 to swing downward in the swing space 4. The clamping section 91 and the contact section 801 form a state of being separated from each other to allow the wire to be inserted therebetween or removed. The wiring operator sequentially inserts the joint of the wire into the wiring hole 102 and the threading port 103. A portion of the joint of the wire passing through the threading port 103 is inserted between the clamping section 91 and the abutting section 801. Preferably, the abutting section 801 is provided with several slots 804 arranged at intervals. A tail end of the clamping section 91 abuts against the corresponding slot 804 to ensure reliable clamping connection of the joint of the wire between the clamping section 91 and the abutting section 801. After that, the wiring operator releases the drive key 15, the elastic piece 9 returns to the original shape, and the clamping section 91 swings upward in the swing space 4 to drive the drive key 15 to return to an original position. The clamping section 91 and the abutting section 801 clamp the joint of the wire, thereby completing the wiring operation of the terminal block. During the wiring operation, the wiring operator can directly observe the connection of the wire inserted between the clamping section 91 and the abutting section 801 from the assembly side of the terminal block through the observation port 7, so that the wiring operator can operate the clamping section 91 by the drive key 15 according to the connection of the wire, ensure that the clamping section 91 of the elastic piece 9 and the abutting section of the conductive frame 8 reliably clamp the joint of the wire, avoid unreliable connection between the terminal block and the wire, and facilitate the wiring operation, which improves the wiring efficiency.Second Embodiment:
[0029] Referring to FIGs. 7, 8, 9, and 10, unlike the first embodiment, the interference structure further includes a wire port interference portion 61 protruding relative to the wire port wall 105, the wire port interference portion 61 is arranged to protrude downward and extend along the wire port wall 105, or the wire port interference portion 61 is arranged in the assembly cavity 101 and located below the wire port wall 105. Preferably, the wire port interference portion 61 is in fit with the corresponding vertical side wall 17 thereof, and a thickness of the wire port interference portion 61 is less than or equal to a thickness of the vertical side wall 17. When the elastic piece 9 is bent into the assembly cavity 101 for assembly, the wire port interference portion 61 drives the clamping section 91 to be biased downward so that the clamping section 91 cannot pass through the observation port 7. The baffle interference portion 62 is located in the baffle portion 21 close to the wire port interference portion 61, so that the wire port interference portion 61 is arranged opposite to the baffle interference portion 62, a distance between the baffle interference portion 62 and the wire port interference portion 61 is smaller than the thickness of the abutting section 801, a minimum distance between the inclined plane 10 and a side of the wire port interference portion 61 opposite thereto is D3, the thickness of the clamping section 91 is D2, and the minimum distance D3 between opposite sides of the baffle interference portion 62 and the wire port interference portion 61 is smaller than the thickness D2 of the clamping section 91, so that the interference structure interferes with the clamping section 91, preventing the clamping section 91 of the elastic piece 9 from entering the assembly cavity 101 through the observation port 7, thereby ensuring that the clamping section 91 is assembled into the swing space 4 in a correct way, thereby avoiding damage to the observation port 7 by the clamping section 91 due to wrong mounting of the elastic piece 9. Preferably, positions of the wire port interference portion 61 and the top end of the baffle portion 21 are staggered to prevent the wire port interference portion 61 from obstructing the wire operator from observing connection of the wire through the observation port 7.Third Embodiment:
[0030] Referring to FIG. 10, unlike the first embodiment, the insulating shell 1 further has an upper baffle 106 extending downward along the wire port wall 105, the observation port 7 is formed between opposite sides of the upper baffle 106 and the baffle portion 21, a length of the upper baffle 106 is 40% to 80% of a length of the swing space 4, ensuring that the upper baffle 106 blocks the clamping section 91 from passing through the observation port 7 when the elastic piece 9 is bent into the assembly cavity 101 for assembly, so that the clamping section 91 cannot be assembled through the observation port 7 but is bent by the elastic piece 9 to be assembled into the assembly cavity 101. When the clamping section 91 and the abutting section form a state of being separated from each other, the clamping section 91 is located at a position to be clamped, and the observation port 7 corresponds to the position to be clamped, so that the wire operator can directly observe the connection of the joint of the wire clamped between the clamping section 91 and the abutting section from the assembly side of the terminal block.
[0031] While the present invention has been described with respect to the typical embodiments, the present invention can also have a variety of other specific embodiments, and the technical solutions formed by the use of equivalent replacement or equivalent transformation all fall within the scope of the present invention.
Claims
1. A terminal block comprising: an insulating shell (1), wherein one side of the insulating shell (1) is provided with an assembly cavity (101), the insulating shell (1) is provided with at least one wiring hole (102), a threading port (103) through which a wire passes is formed in communication between the wiring hole (102) and the assembly cavity (101), and the insulating shell (1) is provided with a wire port wall (105) at a position corresponding to the threading port (103); a limiting structure (2), wherein the limiting structure (2) is fixed in the assembly cavity (101), the limiting structure (2) comprises a baffle portion (21) and a supporting portion (22), a first positioning space (3) is formed between an edge portion of the baffle portion (21) and an inner wall of the assembly cavity (101) corresponding thereto, a swing space (4) is formed between an inner side wall of the baffle portion (21) and the inner wall of the assembly cavity (101), a second positioning space (5) is formed between the supporting portion (22) and the inner wall of the assembly cavity (101) corresponding thereto, and the baffle portion (21) is spaced apart from the wire port wall (105) to form an observation port (7) therebetween; a conductive frame (8), wherein an abutting section (801) is provided on the conductive frame (8), and the abutting section (801) is at least partially arranged in the first positioning space (3); and an elastic piece (9), wherein the elastic piece (9) comprises a clamping section (91), a centering section (92) and a positioning section (93) connected to each other, the centering section (92) is mounted in the second positioning space (5) when the elastic piece (9) is bent into the assembly cavity (101) for assembly, and the clamping section (91) cannot pass through the observation port (7), and the assembled clamping section (91) and the abutting section (801) form a state of abutting against each other or a state of being separated from each other to allow the wire to be clamped therebetween or removed.
2. The terminal block according to claim 1, wherein a gap between the baffle portion (21) and the wire port wall (105) at least at one place is smaller than a thickness of the abutting section (801), so that the clamping section (91) cannot pass through the observation port (7); or the insulating shell (1) is further provided with a wire port interference portion (61) protruding relative to the wire port wall (105), and when the elastic piece (9) is assembled into the assembly cavity (101), the wire port interference portion (61) drives the clamping section (91) to be biased downward so that the clamping section (91) cannot pass through the observation port (7); or the insulating shell (1) further has an upper baffle (106) extending downwardly along the wire port wall (105), the observation port (7) is formed between opposite sides of the upper baffle (106) and the baffle portion (21), so that the clamping section (91) cannot be assembled through the observation port (7) but is bent by the elastic piece (9) to be assembled into the assembly cavity (101).
3. The terminal block according to claim 2, wherein when the gap between the baffle portion (21) and the wire port wall (105) at least at one place is smaller than the thickness of the abutting section (801), a baffle interference portion (62) is provided at a top end of the baffle portion (21), the baffle interference portion (62) is an inclined block or a bump, and a distance between the baffle interference portion (62) and the wire port wall (105) is smaller than the thickness of the abutting section (801).
4. The terminal block according to claim 2, wherein when the insulating shell (1) is provided with the wire port interference portion (61), the wire port interference portion (61) is arranged to protrude downward and extend along the wire port wall (105), or the wire port interference portion (61) is arranged in the assembly cavity (101) and located below the wire port wall (105).
5. The terminal block according to claim 4, wherein a baffle interference portion (62) is provided at a top end of the baffle portion (21), the baffle interference portion (62) is an inclined block or a bump, and the baffle interference portion (62) is arranged on a side close to the wire port interference portion (61), and a distance between the baffle interference portion (62) and the wire port interference portion (61) is smaller than the thickness of the abutting section (801).
6. The terminal block according to claim 2, wherein when the insulating shell (1) is provided with an upper baffle (106), a length of the upper baffle (106) is 40% to 80% of a length of the swing space (4).
7. The terminal block according to claim 1, wherein an inner wall of the baffle portion (21) is provided with a connecting plate (11), the connecting plate (11) extends inward and is fixedly connected to the inner wall of the assembly cavity (101), and a bottom of the connecting plate (11) protrudes outward to form a positioning block (12), and the conductive frame (8) is provided with a positioning groove (803) for inserting the positioning block (12).
8. The terminal block according to claim 7, wherein the connecting plate (11) is provided with an extension arm (13), the extension arm (13) extends toward an inner side of the assembly cavity (101) and is fixedly connected to the inner wall of the assembly cavity (101), an assembly space (14) is formed between the baffle portion (21) and the extension arm (13), so that the clamping section (91) penetrates into the assembly space (14) to be bent by the elastic piece (9) to be assembled into the assembly cavity (101).
9. The terminal block according to claim 1, wherein a width of the baffle portion (21) is smaller than an inner diameter of the threading port (103).
10. The terminal block according to claim 1, further comprising a drive key (15), wherein the insulating shell (1) is provided with a sliding hole (104) at a position close to the wiring hole (102), the drive key (15) is slidably connected in the sliding hole (104), and a bottom of the drive key (15) abuts against the clamping section (91).