Cascaded terminal and cascaded circuit breaker

Abstract

The utility model provides a cascade terminal and a cascade circuit breaker, and relates to the technical field of low-voltage electrical appliances, the cascade terminal comprises a shell and a connector arranged in the shell, the connector is provided with a third contact position which is in single-side contact with a circuit board of the circuit breaker to realize electrical connection, and a pre-pressing surface matched with the third contact position is formed on the shell. Prestress is provided for the third contact position through the prepressing surface, so that reliable electric connection between the third contact position and the circuit board is realized. The third contact position is of a single-face contact structure, the structure of the pole connection terminal is simplified, and the size of the pole connection terminal is reduced; and when the connector is matched with the shell of the pole connection terminal, the occupied space of the top layer, provided with the third contact position, of the shell is correspondingly reduced. In the installation process of the connector and the shell, the pre-pressing surface of the shell extrudes the third contact position to generate pre-stress, so that the third contact position enters an assembly state to be reliably and electrically connected with a circuit board to enter a working state, the processing error can be reduced, and the stable connection of the pole connection terminal and the circuit breaker is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of low-voltage electrical appliances, and in particular to a pole-binding terminal and a pole-binding circuit breaker. Background Art

[0002] In order to increase the working voltage of the circuit breaker, multiple circuit breakers can be arranged side by side to form a pole-linked circuit breaker, so as to achieve the requirement of higher working voltage through multiple breakpoints. Accordingly, the terminals connected to the circuit breaker also adopt a pole-linked method of multiple terminals to cooperate with the pole-linked circuit breaker. However, the existing pole-linked terminal structure is relatively complex and occupies a large space, which is not conducive to the design needs of miniaturization of pole-linked circuit breakers. Utility Model Content

[0003] The purpose of the present application is to provide a pole-binding terminal and a pole-binding circuit breaker to address the deficiencies in the above-mentioned prior art, which can reduce the space occupied by the pole-binding terminal and ensure the reliability of the connection between the pole-binding terminal and the circuit breaker.

[0004] To achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows:

[0005] According to one aspect of an embodiment of the present application, a pole-link terminal is provided, comprising a shell and a connector arranged in the shell, wherein the connector has a third contact position for single-sided contact with a circuit board of a circuit breaker to achieve electrical connection, and a prestressing surface matching the third contact position is formed on the shell, and prestressing is provided to the third contact position through the prestressing surface to achieve reliable electrical connection between the third contact position and the circuit board.

[0006] Another aspect of an embodiment of the present application provides a pole-linked circuit breaker, comprising a plurality of circuit breakers arranged side by side, and a plurality of the above-mentioned pole-linked terminals respectively matched with the circuit breakers, wherein the pole-linked terminals are electrically connected to a circuit board in the circuit breaker through a third contact position of a connector, so that the connector enters a working state in which it is connected to the circuit board.

[0007] The beneficial effects of this application include:

[0008] The present application provides a pole-link terminal and a pole-link circuit breaker. The pole-link terminal realizes single-sided contact with the circuit board through the third contact position of the connector. The third contact position is a single-sided contact structure, which simplifies the structure of the pole-link terminal and reduces the volume of the pole-link terminal. When the connector and the housing of the pole-link terminal are adapted, the space occupied by the top layer of the housing where the third contact position is set is correspondingly reduced. A pre-stressing surface is also formed on the housing, and the pre-stressing surface matches the third contact position. During the installation of the connector and the housing, the pre-stressing surface of the housing will squeeze the third contact position to generate prestress, so that the third contact position enters the assembly state and enters the working state with reliable electrical connection with the circuit board. It can also reduce processing errors and ensure the stable connection between the pole-link terminal and the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0010] Figure 1 A schematic diagram of the structure of the pole-connecting terminal provided in an embodiment of the present application;

[0011] Figure 2 One of the exploded schematic diagrams of the pole connection terminal provided in the embodiment of the present application;

[0012] Figure 3a A schematic diagram of the matching of the pole connection terminal and the circuit board provided in the embodiment of the present application;

[0013] Figure 3b A schematic diagram of the matching of multi-pole pole-connected terminals provided in an embodiment of the present application;

[0014] Figure 4a One of the structural schematic diagrams of the pole-link terminal connector provided in the embodiment of the present application;

[0015] Figure 4b The second structural schematic diagram of the pole-link terminal connector provided in the embodiment of the present application;

[0016] Figure 5 The second exploded schematic diagram of the pole connection terminal provided in the embodiment of the present application;

[0017] Figure 6 The third exploded schematic diagram of the pole connection terminal provided in the embodiment of the present application;

[0018] Figure 7a A matching diagram of the first housing and the third contact position of the connector provided in an embodiment of the present application;

[0019] Figure 7b A free state diagram of the third contact position of the pole connection terminal provided in an embodiment of the present application;

[0020] Figure 7c An assembly diagram of the third contact position of the pole-link terminal provided in an embodiment of the present application;

[0021] Figure 8 One of the structural schematic diagrams of the first housing of the pole-connecting terminal provided in the embodiment of the present application;

[0022] Fig. 9 The second structural schematic diagram of the first housing of the pole-connecting terminal provided in the embodiment of the present application;

[0023] Fig.10 One of the structural schematic diagrams of the second housing of the pole-connecting terminal provided in the embodiment of the present application;

[0024] Fig.11 The second structural schematic diagram of the second housing of the pole-connecting terminal provided in the embodiment of the present application;

[0025] Fig.12 One of the structural schematic diagrams of the pole-connected circuit breaker provided in the embodiment of the present application;

[0026] Fig.13 The second structural schematic diagram of the pole-connected circuit breaker provided in the embodiment of the present application;

[0027] Fig.14 The third structural schematic diagram of the pole-connected circuit breaker provided in the embodiment of the present application;

[0028] Fig.15 for Fig.14 Enlarged view of point A in the middle.

[0029] Icons: 10-connector; 11a-first contact position; 12a-second contact position; 12b-third contact position; 110-pin; 1101a-outer groove surface; 120-connecting part; 20-polar connection terminal; 20a-housing; 21-first housing; 21a-pre-pressing surface; 21b-first card slot; 21c-first plug hole; 210-plug part; 211-first card slot; 212-first guide structure; 212a-guide card protrusion; 212b-guide slope; 213a-first guide slope; 214a-second guide slope; 215a-first buckle; 216a-second buckle; 22 -second housing; 22a-second plug-in hole; 22b-inner wall of the groove; 220-protrusion; 221-second slot portion; 221a-second slot; 221b-plug-in structure; 222-third slot portion; 222a-third slot; 222b-guide surface; 223-first guide groove; 223a-first engaging surface; 224a-guide arc surface; 225-clamp structure; 225a-claw; 226-gap groove; 227-second guide groove; 227a-second engaging surface; 30-circuit breaker; 31-circuit board; 310-contact; F1-first direction; F2-second direction; F3-third direction. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. It should be noted that, in the absence of conflict, the various features in the embodiments of the present application can be combined with each other, and the combined embodiments are still within the scope of protection of the present application.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0033] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0034] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0035] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0036] In one aspect of the embodiment of the present application, referring to Figure 1 , Figure 2, a pole-link terminal 20 is provided, comprising a shell 20a, and a connector 10 arranged in the shell 20a, the connector 10 having a third contact position 12b for single-sided contact with a circuit board 31 of a circuit breaker 30 to achieve electrical connection, a pre-stressing surface 21a matching the third contact position 12b is formed on the shell 20a, and pre-stress is provided to the third contact position 12b through the pre-stressing surface 21a to achieve reliable electrical connection between the third contact position 12b and the circuit board 31.

[0037] The connector 10 is a structure in which the pole terminals 20 are used for electrical connection. Figure 4a As shown, the connector 10 has a first contact position 11a, a second contact position 12a and a third contact position 12b, wherein the first contact position 11a is used to contact and electrically connect with the second contact position 12a of an adjacent pole connector 10, thereby forming a pole connection of multiple pole connection terminals 20 along the first direction F1 to match multiple circuit breakers 30 arranged side by side along the first direction F1.

[0038] Figure 4a In the connector 10, the second contact position 12a is formed on the clamping structure to clamp the first contact position 11a of the adjacent one-pole connector 10, which can be referred to Figure 3b Connect adjacent connectors 10 in sequence; in other embodiments, the connector 10 may also be Figure 4b As shown, the second contact position 12a has only a single-sided structure, and electrical connection is achieved through the contact between the second contact position 12a and the first contact position 11a of the adjacent one-pole connector 10.

[0039] The third contact position 12 b is used to make electrical contact with the circuit board 31 in the circuit breaker 30 to achieve conduction between the pole-connecting terminal 20 and the circuit breaker 30 .

[0040] For example, Figure 3a A plurality of connectors 10 are arranged side by side along the second direction F2 in the middle pole terminal 20 , and the third contact positions 12b of the plurality of connectors 10 can match the plurality of contacts 310 along the second direction F2 on the same circuit board 31 , and the third contact positions 12b and the contacts 310 correspond one to one.

[0041] A contact point 310 is formed on a surface of the circuit board 31 facing the third contact position 12 b so as to be in contact and conduct with the third contact position 12 b.

[0042] Based on this, the contacts 310 can be arranged on both the front and back sides of the circuit board 31 along the first direction F1 to achieve Figure 3a Both sides of the middle circuit board 31 can contact the third contact position 12b. When set in this way, no matter whether the circuit board 31 is installed right side up or down, it can cooperate with the third contact position 12b to achieve electrical connection, so as to avoid the situation where the other side has no contact 310 and cannot be conductive due to the circuit board 31 being installed upside down.

[0043] In this application, Figure 4a , Figure 4b The first contact position 11a, the second contact position 12a and the third contact position 12b of the connector 10 form a T-shaped distribution, such as Figure 2 , Figure 3a As shown, the third contact position 12b is arranged at the top layer of the housing 20a, and the third contact position 12b and the circuit board 31 realize Figure 3b The third contact position 12b is a single-sided contact structure, which simplifies the structure of the connector 10 and reduces the volume of the connector 10; when the connector 10 and the shell 20a are adapted, the space occupied by the top layer of the shell 20a is correspondingly reduced.

[0044] In addition, if Figure 7a As shown, a pre-stressed surface 21a is also formed on the shell 20a, and the pre-stressed surface 21a matches the third contact position 12b. During the installation of the connector 10 and the shell 20a, the pre-stressed surface 21a of the shell 20a will squeeze the third contact position 12b to generate prestress, so that the third contact position 12b enters the assembly state and enters the working state with reliable electrical connection with the circuit board 31. It can also reduce processing errors and ensure the stable connection between the pole terminal 20 and the circuit breaker 30.

[0045] like Figure 7b As shown, when the connector 10 and the housing 20a are assembled, the housing 20a includes a first housing 21 and a second housing 22 that match each other. The first housing 21 and the second housing 22 can be plugged into each other or matched in other ways. The connector 10 is first installed into the second housing 22 of the housing 20a, and the connector 10 is in a natural state. Then the first housing 21 is installed into the second housing 22, so that the first housing 21 is still engaged with the connector 10. Figure 7a As shown, the first housing 21 moves toward the third contact position 12b, the pre-pressing surface 21a first contacts the third contact position 12b, and then the pre-pressing surface 21a squeezes the third contact position 12b, so that the third contact position 12b generates prestress. Figure 7c When the pole-link terminal 20 and the circuit breaker 30 are installed, the third contact position 12b contacts and squeezes the circuit board 31 and is separated from the pre-pressed surface 21a to achieve conduction with the circuit board 31, forming Figure 3b In the working state shown, the electrical connection between the pole-binding terminal 20 and the circuit breaker 30 is realized.

[0046] Specifically, Figure 5As shown, the shell 20a includes a first shell 21 and a second shell 22. In one embodiment, the first shell 21 is inserted into the second shell 22, the third contact position 12b is adapted to the second shell 22, and a pre-stressing surface 21a is formed on the side of the first shell 21 facing the third contact position 12b; the third contact position 12b is squeezed by the pre-stressing surface 21a to generate prestress, so that the third contact position 12b enters an assembled state.

[0047] The connector 10 is disposed in the second housing 22, the first contact position 11a of the connector 10 is located in the second housing 22, one end (plug-in portion 210) of the first housing 21 of the adjacent pole-connecting terminal 20 extends into the second housing 22 to match the first contact position 11a; the second contact position 12a of the connector 10 extends out of the second housing 22, and the other end (first slot portion 211) of the first housing 21 extends into the second housing 22 to match the second contact position 12a; the second housing 22 is also formed with a protrusion 220 along the third direction F3, and a clearance groove 226 is formed on the protrusion 220 to accommodate the third contact position 12b of the connector 10. The first direction F1, the second direction F2 and the third direction F3 are perpendicular to each other.

[0048] It can be seen that the second shell 22 is used to accommodate the connector 10, and the first shell 21 serves as a plug-in matching structure to achieve sequential connection of adjacent pole terminals 20.

[0049] Reference Figure 6 The first shell 21 includes a plug-in portion 210 and a first slot portion 211, and the second shell 22 includes a second slot portion 221 and a third slot portion 222. The plug-in portion 210 and the first slot portion 211, the second slot portion 221 and the third slot portion 222 are all arranged along the first direction F1, that is, along the direction of the pole connection.

[0050] A plug-in structure 221b is provided in the second slot portion 221, and the plug-in structure 221b is used to cooperate with the pin 110 of the connector 10. The first slot portion 211 and the second slot portion 221 cooperate to realize the plug-in connection between the first shell 21 and the second shell 22 of the same pole-link terminal 20; the plug-in portion 210 and the third slot portion 222 of the adjacent pole-link terminal 20 are plug-in-matched to realize the plug-in connection of multi-pole pole-link terminals 20; wherein the pre-stressing surface 21a is formed on the side of the first slot portion 211 facing the second shell 22.

[0051] In other words, the first shell 21 and the second shell 22 are plug-connected, and the adjacent pole terminals 20 are plug-connected. The plug-in connection is convenient for assembly and disassembly, and can improve assembly efficiency.

[0052] Furthermore, if Figure 8As shown, when the same pole-bonding terminal 20 is assembled, a first guide structure 212 is provided on the first housing 21 for guiding and installing the first housing 21 and the second housing 22 of the same pole-bonding terminal 20;

[0053] The first guide structure 212 includes a guide protrusion 212a disposed on the outer wall of the first slot portion 211 away from the plug-in portion 210. The guide protrusion 212a extends toward the second slot portion 221 of the second housing 22. A guide inclined surface 212b is formed at the end of the guide protrusion 212a facing the second slot portion 221, so that the guide protrusion 212a has a guiding function. Fig. 9 , Fig.10 The first card slot portion 211 of the first shell 21 is formed with a plurality of first card slots 21b arranged side by side along the second direction F2, and the second card slot portion 221 of the second shell 22 is formed with a plurality of second card slots 221a arranged side by side along the second direction F2, and the first card slots 21b are inserted into the second card slots 221a one by one.

[0054] Guide protrusions 212a are formed on the two outer walls of the first slot portion 211 along the second direction F2, corresponding to the two inner walls 22b of the second slot portion 221 along the second direction F2; the first slot portion 211 is guided along the inner wall 22b of the second slot portion 221 through the guide protrusions 212a to be inserted into the second slot portion 221, so as to realize the guided insertion of the first slot portion 211 and the second slot portion 221.

[0055] like Fig.10 As shown, the plug-in structure 221b is located in the second slot 221a. By way of example, the plug-in structure 221b is formed by the second plug-in hole 22a and various ribs arranged outside the second plug-in hole 22a, so as to form a protruding structure in the second slot 221a as the plug-in structure 221b, which cooperates with the pin 110 of the connector 10.

[0056] A second guide structure is provided on the first housing 21. A connection portion 120 is formed at one end of the connector 10 facing the first housing 21. The second contact position 12a is formed at the connection portion 120. For example, the connection portion 120 is a clamping structure. The second guide structure is used for guiding the installation of the first housing 21 of the same pole-connecting terminal 20 and the connection portion 120 of the connector 10.

[0057] A first card slot 21b is provided on one side of the first card slot portion 211 facing the second shell 22, and a first plug hole 21c matching the connector 10 is also formed in the first card slot 21b; the second guide structure includes a first guide slope 213a provided at the notch of the first card slot 21b, and the first shell 21 guides the connecting portion 120 of the connector 10 into the first card slot 21b through the first guide slope 213a, thereby completing the matching installation of the connector 10 and the first shell 21.

[0058] A third guiding structure is provided on the first housing 21 for guiding the installation of the first housing 21 and the second housing 22 of the adjacent pole-binding terminal 20 .

[0059] For example, Fig.11 As shown, the third guide structure includes a second guide slope 214a formed on the plug-in portion 210, and the second guide slope 214a is located at the plug-in portion 210 toward the adjacent pole terminal 20

[0060] On the end surface of the second shell 22, the second guiding inclined surface 214a faces the third slot portion 222 of the adjacent second shell 22, and cooperates with the guiding surface 222b of the third slot portion 222. The plug-in portion 210 is inserted into the adjacent third slot portion 222 through the second guiding inclined surface 214a, thereby realizing the plug-in of adjacent pole terminals 20.

[0061] The third slot portion 222 is formed with a plurality of third slots 222a arranged side by side along the second direction F2. A guide surface 222b is formed on the bottom wall of the third slot 222a to cooperate with the second guide slope 214a of the plug-in portion 210 of the first shell 21 for guidance.

[0062] Furthermore, in order to improve the reliability of installation, the first shell 21 and the second shell 22 and the adjacent pole-connecting terminals 20 are also installed by snap-fitting.

[0063] Specifically, Figure 8 As shown, the outer wall of the first slot portion 211 of the first shell 21 forms a first snap 215a, and the outer wall of the second slot portion 221 of the second shell 22 forms a first snap-fit ​​surface 223a. The first snap 215a and the first snap-fit ​​surface 223a cooperate to achieve the snap-fit ​​cooperation between the first shell 21 and the second shell 22 of the same pole-connecting terminal 20.

[0064] Fig.10 The outer wall of the second slot portion 221 is provided with a first guide slot 223 along the first direction F1, and the first guide slot 223 extends from the outer wall of the second slot portion 221 of the second housing 22 to the outer wall of the third slot portion 222. The first clamping surface 223a is formed in the first guide slot 223 and is the slot wall of the first guide slot 223. The first buckle 215a is clamped along the first guide slot 223 to cooperate with the first clamping surface 223a, so that the first housing 21 and the second housing 22 of the same pole-connecting terminal 20 are clamped and matched.

[0065] The outer wall of the plug-in portion 210 of the first shell 21 forms a second snap-fit ​​216 a, and the inner wall 22 b of the third slot portion 222 of the second shell 22 of the adjacent pole-connecting terminal 20 forms a second snap-fit ​​surface 227 a. The second snap-fit ​​216 a and the second snap-fit ​​surface 227 a cooperate and abut to achieve the snap-fit ​​of the adjacent pole-connecting terminals 20.

[0066] Fig.11 The inner wall 22b of the third slot portion 222 forms a second guide slot 227 along the first direction F1, the second clamping surface 227a is formed in the second guide slot 227 and is the slot wall of the second guide slot 227, the second buckle 216a is clamped in the second guide slot 227 to cooperate and resist with the second clamping surface 227a, thereby completing the sequential clamping of adjacent pole terminals 20.

[0067] During assembly, the first shell 21 is inserted into the third slot 222a of the second shell 22 under the guidance of the third guide structure until the second buckle 216a of the first shell 21 is engaged with the second engaging surface 227a of the second shell 22, thereby completing the installation of the first shell 21 and the second shell 22 of the adjacent pole terminal 20.

[0068] In addition, a guide structure is provided on the second shell 22, and a pin 110 is formed at one end of the connector 10 facing the adjacent pole terminal 20. The guide structure is used to cooperate and guide with the pin 110 of the connector 10, and the first contact position 11a is formed on the outer groove surface 1101a of the pin 110 in the third direction F3.

[0069] A second plug-in hole 22a is formed in the second shell body 22, which passes through the second slot portion 221 and the third slot portion 222. By way of example, the second plug-in hole 22a is a D-shaped hole to be mounted to fit the shape of the plug pin 110 of the connector 10. The guide structure includes a guide arc surface 224a at the opening of the second plug-in hole 22a located in the second slot portion 221, so that the plug pin 110 can pass through the guide arc surface 224a and enter the second plug-in hole 22a.

[0070] The second plugging hole 22 a in the second housing 22 and the first plugging hole 21 c in the first housing 21 are connected to each other so as to facilitate the matching installation of the first contact position 11 a and the second contact position 12 a of the connector 10 with the first housing 21 and the second housing 22 .

[0071] One end opening of the second plug-in hole 22a is located in the second slot portion 221, and the other end opening is located in the third slot portion 222, wherein a guide arc surface 224a is formed at the opening in the second slot portion 221. When the plug pin 110 is inserted into the second shell 22 through the opening, the guide arc surface 224a can guide the plug pin 110 to enter smoothly, thereby realizing the connection between the plug pin 110 and the second shell 22.

[0072] The second housing 22 is also provided with a buckle structure 225. Fig.10 As shown, the buckle structure 225 includes claws 225a disposed on both sides of the second housing 22 along the second direction F2, and is engaged with the external component through the claws 225a.

[0073] For example, the external component may be a guide rail, and the second housing 22 is clamped to the guide rail via a snap structure 225. Usually, a plurality of pole-binding terminals 20 are arranged side by side on the guide rail, the circuit breaker 30 is clamped to the pole-binding terminal 20, and the pole-binding terminal 20 is clamped to the guide rail; or, the circuit breaker 30 and the pole-binding terminal 20 are clamped to the guide rail respectively.

[0074] When the pole-connecting terminal 20 is engaged with the guide rail, the buckle structure 225 of the pole-connecting terminal 20 is engaged with the guide rail; both sides of the guide rail have abutment parts adapted to the claws 225a, and the claws 225a are engaged with the abutment parts to enable the pole-connecting terminal 20 to be engaged with the guide rail.

[0075] On the other hand, refer to Fig.12 As shown, an embodiment of the present application also discloses a pole-bonding circuit breaker 30, including multiple circuit breakers 30, and multiple pole-bonding terminals 20 as any one of the above items respectively matched with the circuit breakers 30, and the pole-bonding terminals 20 are electrically connected to the circuit board 31 of the circuit breaker 30 through the third contact position 12b, so that the connector 10 enters a working state of being connected to the circuit board 31.

[0076] Fig.12 , Fig.13 The example of four circuit breakers 30 and four pole-connecting terminals 20 being connected in sequence is shown. Fig.14 , Fig.15 As shown, each pole-bonding terminal 20 is electrically connected to the circuit board 31 in the circuit breaker 30 through its third contact position 12 b, thereby completing the conduction of the pole-bonding circuit breaker 30, and the connector 10 enters the working state.

[0077] The pole-bonding circuit breaker 30 includes the same structure and beneficial effects as the pole-bonding terminal 20 in the aforementioned embodiment. The structure and beneficial effects of the pole-bonding terminal 20 have been described in detail in the aforementioned embodiment, and will not be repeated here.

[0078] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A pole-connecting terminal (20), characterized in that: The invention comprises a shell (20a), and a connector (10) arranged in the shell (20a), wherein the connector (10) has a third contact position (12b) for single-sided contact with a circuit board (31) of a circuit breaker (30) to realize electrical connection, and a pre-stressing surface (21a) matching the third contact position (12b) is formed on the shell (20a), and pre-stress is provided to the third contact position (12b) through the pre-stressing surface (21a) to realize reliable electrical connection between the third contact position (12b) and the circuit board (31).

2. The pole-binding terminal (20) according to claim 1, characterized in that: The shell (20a) comprises a first shell (21) and a second shell (22) that match each other, the third contact position (12b) is adapted to the second shell (22), and the pre-pressing surface (21a) is formed on a side of the first shell (21) facing the third contact position (12b); the third contact position (12b) is pressed by the pre-pressing surface (21a) to generate prestress, so that the third contact position (12b) enters an assembled state.

3. The pole-binding terminal (20) according to claim 2, characterized in that: The first housing (21) comprises an inserting portion (210) and a first slot portion (211), the second housing (22) comprises a second slot portion (221) and a third slot portion (222), and the pre-pressing surface (21a) is formed on a side of the first slot portion (211) facing the second housing (22); The first card slot portion (211) and the second card slot portion (221) cooperate to achieve connection between the first shell (21) and the second shell (22) of the same pole-connecting terminal (20); And / or, the plug-in portion (210) and the third slot portion (222) of the adjacent pole-link terminal (20) are plugged together to achieve plug-in connection of the pole-link terminals (20) of multiple poles.

4. The pole-binding terminal (20) according to claim 3, characterized in that: A first guiding structure (212) is provided on the first housing (21) for guiding the installation of the first housing (21) and the second housing (22) of the same pole-connecting terminal (20); The first guide structure (212) comprises a guide protrusion (212a) arranged on the outer wall of the first slot portion (211), and the guide protrusion (212a) extends toward the second slot portion (221) of the second shell (22), and the first slot portion (211) is guided along the inner wall (22b) of the second slot portion (221) through the guide protrusion (212a) to be inserted into the second slot portion (221) so as to be plugged and matched with the second slot portion (221).

5. The pole-binding terminal (20) according to claim 3, characterized in that: A second guiding structure is provided on the first housing (21), a connecting portion (120) is formed at one end of the connector (10) facing the first housing (21), and the second guiding structure is used for guiding the installation of the first housing (21) of the same pole-connecting terminal (20) and the connecting portion (120) of the connector (10); A first card slot (21b) is provided on one side of the first card slot portion (211) facing the second shell (22); the second guide structure comprises a first guide inclined surface (213a) provided at a notch of the first card slot (21b); and the connecting portion (120) is plugged into the first card slot (21b) via the first guide inclined surface (213a).

6. The pole-binding terminal (20) according to claim 3, characterized in that: A third guiding structure is provided on the first housing (21) for guiding the installation of the first housing (21) and a second housing (22) adjacent to the pole-connecting terminal (20); The third guiding structure comprises a second guiding inclined surface (214a) formed on the plug-in portion (210), wherein the second guiding inclined surface (214a) faces a third slot portion (222) of a second shell (22) adjacent to the pole-connecting terminal (20), and the plug-in portion (210) is inserted into the adjacent third slot portion (222) through the second guiding inclined surface (214a).

7. The pole-binding terminal (20) according to any one of claims 3 to 6, characterized in that: The first shell (21) and the second shell (22) are snap-fitted; The outer wall of the first slot portion (211) of the first housing (21) forms a first snap-fit ​​(215a), and the outer wall of the second slot portion (221) of the second housing (22) forms a first snap-fit ​​surface (223a); the first snap-fit ​​(215a) and the first snap-fit ​​surface (223a) cooperate to achieve snap-fit ​​cooperation between the first housing (21) and the second housing (22) of the same pole-connecting terminal (20); And / or, the outer wall of the plug-in portion (210) of the first shell (21) forms a second snap-fit ​​(216a), the inner wall (22b) of the third snap-fit ​​portion (222) of the second shell (22) of the adjacent pole-binding terminal (20) forms a second snap-fit ​​surface (227a), and the second snap-fit ​​(216a) and the second snap-fit ​​surface (227a) are snap-fitted to achieve snap-fitting of the adjacent pole-binding terminals (20).

8. The pole-binding terminal (20) according to any one of claims 3 to 6, characterized in that: A guiding structure is provided on the second housing (22); a plug pin (110) is formed on one end of the connector (10) facing the adjacent pole-link terminal (20); a plug-in structure (221b) is provided in the second slot (221) for cooperating with the plug pin (110); and the guiding structure is used for cooperating and guiding with the plug pin (110) of the connector (10); A second plug hole (22a) is formed in the second housing (22) and passes through the second slot portion (221) and the third slot portion (222); the guide structure comprises a guide arc surface (224a) at the opening of the second plug hole (22a) located in the second slot portion (221), so that the plug pin (110) can pass through the guide arc surface (224a) and penetrate into the second plug hole (22a).

9. The pole-binding terminal (20) according to any one of claims 1 to 6, characterized in that: A first contact position (11a) and a second contact position (12a) are also formed on the connector (10), and the electrical connection between adjacent polarity terminals (20) is achieved through the cooperation between the first contact position (11a) and the second contact position (12a) of an adjacent connector (10).

10. A pole-connected circuit breaker (30), characterized in that: It comprises a plurality of circuit breakers (30) arranged side by side, and a plurality of pole-binding terminals (20) according to any one of claims 1 to 9 respectively matched with the circuit breakers (30), wherein the pole-binding terminals (20) are electrically connected to a circuit board (31) in the circuit breaker (30) via a third contact position (12b) of a connector (10), so that the connector (10) enters a working state in which it is connected to the circuit board (31).

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