A miniature circuit breaker

Abstract

The present invention relates to a miniature circuit breaker, comprising: a decoupling mechanism, comprising a lock buckle and a trip buckle which are effectively connected; an execution component, which is used to push the lock buckle so that the lock buckle is disconnected from the trip buckle to complete the decoupling action; and an operation component, which is used to drive the trip buckle to reset so that the decoupling mechanism which has completed the decoupling can re-establish an effective connection; wherein the lock buckle and the trip buckle are positioned relative to each other through a guide column and a guide hole, and the guide column is extended into the guide hole to limit the relative position of the lock buckle and the trip buckle to achieve effective connection, thereby improving the stability of the lock buckle and the trip buckle when connected to avoid accidental decoupling of the lock buckle and the trip buckle.

Description

Technical Field

[0001] The present invention relates to the field of circuit breakers, and in particular to a miniature circuit breaker. Background Art

[0002] In the field of circuit breakers, a circuit breaker refers to a switching device that can close, carry and disconnect current under normal circuit conditions and can close, carry and disconnect current under abnormal circuit conditions within a specified time. An intelligent miniature circuit breaker is generally composed of a contact system, an arc extinguishing system, an operating mechanism, a decoupling mechanism, a casing, etc. Among them, as an important component of a circuit breaker, the miniature circuit breaker's response speed and effect accuracy are crucial to the circuit breaker. The existing miniature circuit breaker includes at least two detachable locks and trip buckles. Since the lock and trip buckle need to switch between connection and disconnection, the current design method is that when the lock and trip buckle are set to be in a balanced state, the stability of the balanced state of the lock and trip buckle is poor, and it is easy to break the balanced state of the lock and trip buckle during violent movement, thereby causing accidental decoupling. Summary of the invention

[0003] In view of the shortcomings of the prior art, the main purpose of the present invention is to provide a miniature circuit breaker, comprising:

[0004] A decoupling mechanism, which includes a lock buckle and a trip buckle that are effectively connected and arranged;

[0005] An execution component, which is used to push the lock buckle to disconnect it from the jump buckle to complete the unhooking action; and

[0006] An operating component, which is used to drive the tripping buckle to reset so that the unhooking mechanism that has completed the unhooking can re-establish an effective connection;

[0007] Among them, the lock buckle and the jump buckle are positioned relative to each other through the guide column and the guide hole, and the guide column extends into the guide hole to limit the relative position of the lock buckle and the jump buckle to achieve effective connection.

[0008] Preferably, the guide column is installed on the jump buckle, and the guide hole is opened on the lock buckle;

[0009] The contact end surfaces of the lock buckle and the jump buckle are provided with corresponding guide holes and installation openings, the guide column is arranged in the installation opening and one end of the guide column extends from the contact end surface of the jump buckle, so that when the lock buckle and the jump buckle are effectively connected, the guide column extends into the guide hole.

[0010] Preferably, a spiral groove is provided on the inner wall of the installation opening, and a protruding slider is provided on the side wall of the guide column, and the slider slides along the extending direction of the groove to rotate the guide column.

[0011] Preferably, an elastic portion is provided between the guide column and a base surface of the installation opening, and when the guide column is subjected to an external force, the elastic portion is elastically deformed to allow the guide column to retract into the installation opening.

[0012] Preferably, it also includes a base shell, which is used to receive the components of the miniature circuit breaker; the guide hole passes through the corresponding two side surfaces of the lock buckle;

[0013] A push rod is arranged in the guide hole and is mounted on the base shell. The push rod touches the guide column. When the lock performs the unhooking action, the lock moves relative to the push rod, so that the push rod pushes the guide column out of the guide hole.

[0014] Preferably, the diameter of the push rod is smaller than that of the guide hole.

[0015] Preferably, a matching locking portion is provided on one end of the guide column that contacts the push rod;

[0016] When the lock buckle is effectively connected with the jump buckle, the guide column and the push rod are locked, and when the push rod pushes the guide column to make the guide column rotate, the guide column and the push rod are unlocked.

[0017] Preferably, a raised convex surface is provided on one end surface of the guide column that contacts the push rod, the push rod corresponds to the inward depression of the push rod, and the convex surface is adapted to be connected with the end surface to serve as a locking structure;

[0018] When the lock buckle and the jump buckle are effectively connected, part of the contact convex surface extends into the contact end surface, and when the push rod pushes the guide column to retract into the installation opening, the guide column rotates, so that the part of the contact convex surface extending into the contact end surface interferes with the contact end surface, causing the contact convex surface to withdraw from the recessed contact end surface.

[0019] Preferably, the operating component includes a handle portion and a torsion spring, the handle portion is connected to the jump button transmission, and the torsion spring acts on the handle portion.

[0020] Preferably, it also includes a bracket, which is fixed on a base surface of the miniature circuit breaker, and a slide groove is provided on the bracket; the operating component includes a connecting rod, one end of the connecting rod is pivotally connected to the handle part, and the other end is slidably connected in the slide groove, and the tripping catch is located on the movement path of the connecting rod, and the tripping catch is driven by the movement of the connecting rod.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention provides a miniature circuit breaker, which locates the relative positions of a lock buckle and a trip buckle through a guide column and a guide hole, so as to improve the stability of the connection and avoid the accidental decoupling of the lock buckle and the trip buckle caused by the shaking of the circuit breaker.

[0023] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. The specific implementation of the present invention is given in detail by the following embodiments and their accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of a circuit breaker in one embodiment of the present invention;

[0026] Figure 2 It is a partial structural schematic diagram of a circuit breaker in one embodiment of the present invention;

[0027] Figure 3 for Figure 2 A partial enlarged schematic diagram of

[0028] Figure 4 It is a schematic diagram of the three-dimensional structure of a lock buckle and a jump buckle in one embodiment of the present invention;

[0029] Figure 5 It is a schematic diagram of the three-dimensional structure of the lock buckle and the ejector rod in one embodiment of the present invention;

[0030] Figure 6 It is a schematic diagram of the three-dimensional structure of a jump button in one embodiment of the present invention;

[0031] Figure 7 for Figure 6 A partial enlarged schematic diagram of

[0032] Figure 8 The figure is a simplified diagram of the matching relationship between the ejector rod and the jumper in one embodiment of the present invention.

[0033] Description of reference numerals:

[0034] 11. Lock buckle; 111. Position limiting step; 112. First pivoting portion; 113. Fitting surface; 115. Guide hole; 116. Pushing portion;

[0035] 12. Jump buckle; 121. Buckle foot; 1211. Limiting surface;

[0036] 122, second pivoting portion;

[0037] 123, installation opening; 1231, groove;

[0038] 125, guide column; 1251, abutting convex surface; 1252, slider;

[0039] 126, elastic part; 127, mounting block; 128, reset unit;

[0040] 13. Ejector; 131. Contact end face

[0041] 14. operating part; 141. handle; 142. torsion spring; 143. connecting rod;

[0042] 15. Execution components;

[0043] 16. bracket; 161. slide;

[0044] 21. Base shell. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] In the drawings, the shapes and dimensions may be exaggerated for clarity, and the same reference numerals will be used throughout to designate the same or like components.

[0047] Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by persons of ordinary skill in the field to which the present invention belongs. The words "first", "second" and similar words used in the patent application specification of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one", "one" or "the" do not indicate a quantity limitation, but indicate the existence of at least one. Words such as "include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" cover the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0048] In the following description, words such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, lower, etc. are defined relative to the structure shown in the drawings. In particular, "height" is equivalent to the dimension from top to bottom, "width" is equivalent to the dimension from left to right, and "depth" is equivalent to the dimension from front to back. They are relative concepts and may change accordingly according to their different positions and different usage states. Therefore, these or other directions should not be interpreted as restrictive terms.

[0049] Terms related to attachment, coupling, and the like (eg, "connected" and "attached") refer to either a fixed or attached relationship between structures, either directly or indirectly, and either movable or rigid attachments or relationships, unless expressly stated otherwise, of the structures to one another through intermediate structures.

[0050] According to one embodiment of the present invention, Figure 1-8 It can be seen that a miniature circuit breaker includes: a decoupling mechanism, an actuator 15, a base shell 21 and an operating component 14, the actuator 15 is used to push the lock buckle 11 so that it is disconnected from the trip buckle 12 to complete the decoupling action, and the operating component 14 is used to drive the trip buckle 12 to reset so that the decoupling mechanism that has completed the decoupling can be effectively reconnected, and the base shell 21 is used to receive the components in the miniature circuit breaker; it should be pointed out that the components included in the miniature circuit breaker are not limited to the components mentioned in this implementation description. Although not shown in this implementation description, the miniature circuit breaker also includes at least a contact system, an arc extinguishing system and other components as indispensable components.

[0051] Specifically, the unhooking mechanism includes a lock buckle 11 and a trip buckle 12 adapted to the lock buckle 12. When the circuit is in a normal state, the lock buckle 11 is effectively connected with the trip buckle 12 to form a limit structure; when the circuit is in an abnormal state, the lock buckle 11 is driven by the execution component in the circuit breaker to disconnect from the trip buckle 12 to perform the unhooking action;

[0052] The lock buckle 11 and the jump buckle 12 include corresponding contact surfaces.

[0053] The lock buckle 11 and the jump buckle 12 are positioned relative to each other through the guide column 125 and the guide hole 115, so that the connection between the lock buckle 11 and the jump buckle 12 is more stable. The guide column 125 and the guide hole 115 are arranged on the contact surface; the surface of the lock buckle 11 corresponding to the jump buckle 12 is the fitting surface 113, which extends into the guide hole 115 through the guide column 125, so that the positional relationship between the lock buckle 11 and the jump buckle 12 is limited by the guide column 125 and the guide hole 115, so as to ensure that the lock buckle 11 and the jump buckle 12 form a stable limiting structure to overcome the loosening problem caused by severe shaking.

[0054] In this solution, the guide column 125 is installed on the jump buckle 12, and the guide hole 115 is opened on the lock buckle 11; the guide hole 115 and the installation opening 123 are correspondingly opened on the end surfaces where the lock buckle 11 and the jump buckle 12 are in contact, the guide column 125 is arranged in the installation opening 123 and one end of the guide column 125 extends from the contact end surface of the jump buckle 12, so that when the lock buckle 11 and the jump buckle 12 are effectively connected, the guide column 125 extends into the guide hole 115.

[0055] During normal use, it is found that the unhooking action takes a long time to complete, that is, the response time of unhooking is long, which can easily cause irreversible damage to the circuit in a period of time before the unhooking is completed. Therefore, in order to improve the response speed of unhooking, in a preferred embodiment, an elastic part 126 is provided between the guide column 125 and a base surface of the installation opening 123. When the guide column 125 is subjected to an external force, the elastic part 126 elastically deforms so that the guide column 125 retracts into the installation opening 123, so as to facilitate the guide column 125 to be disengaged from the guide hole 115.

[0056] Furthermore, the guide hole 115 passes through both sides of the lock catch 11; a push rod 13 is provided in the guide hole 115, and the push rod 13 is installed on a fixed base surface of the circuit breaker. The push rod 13 touches the guide column 125. When the lock catch 11 performs the unhooking action, the lock catch 11 moves relative to the push rod 13, so that the push rod 13 pushes the guide column 125 out of the guide hole 115; wherein, since the push rod 13 is installed on the base shell 21 of the circuit breaker, the position of the push rod 13 remains unchanged, and when the lock catch 11 performs the unhooking action, the lock catch 11 is relatively far away from the tripping buckle 12, and since the push rod 13 remains stationary, the push rod 13 is relatively close to the tripping buckle 12, and when approaching the tripping buckle 12, the push rod 13 pushes the guide column 125 so that the guide column 125 can be quickly disengaged from the guide hole 115.

[0057] Furthermore, a matching locking portion is provided on one end of the guide column 125 that contacts the push rod 13; on the other hand, a spiral groove 1231 is provided on the inner wall of the installation opening 123, and a protruding slider 1252 is provided on the side wall of the guide column 125, and the slider 1252 slides along the extension direction of the groove 1231 to rotate the guide column 125, and the spiral groove 1231 guides the guide column 125 to make a linear motion along the extension direction of the installation opening 123, so that the guide column 125 can simultaneously realize both rotation and linear motion, and the position of the jump buckle 12 is limited by locking the guide column 125 with the push rod 13; specifically, when the lock buckle 11 is effectively connected with the jump buckle 12, the guide column 125 is locked with the push rod 13, and when the push rod 13 pushes the guide column 125 to rotate the guide column 125, the guide column 125 is unlocked from the push rod 13.

[0058] Among them, a raised interfering convex surface 1251 is provided on one end surface of the guide column 125 that interferes with the push rod 13, and the push rod 13 corresponds to the inward depression of the push rod 13, and the interfering convex surface 1251 is adaptively connected with the interfering end surface 131 to serve as a locking structure; when the lock buckle 11 and the jump buckle 12 are effectively connected, part of the interfering convex surface 1251 extends into the interfering end surface 131, and when the push rod 13 pushes the guide column 125 to retract into the installation opening 123, the guide column 125 rotates, so that the part of the interfering convex surface 1251 extending into the interfering end surface 131 interferes with the interfering end surface 131 so that the interfering convex surface 1251 withdraws from the recessed interfering end surface 131.

[0059] The slider 1252 on the guide column 125 is semi-spherical so that the contact area between the slider 1252 and the groove 1231 is small, thereby ensuring that the slider 1252 slides normally in the groove 1231 to drive the guide column 125 to rotate smoothly; in this scheme, four grooves 1231 are provided on the inner wall of the mounting port 123 in a circumferential direction. In more detail, the number of thread turns of the groove 1231 from the opening end of the mounting port 123 to the bottom surface is greater than 1 / 4 turn and less than 1 / 2 turn. At the same time, since an elastic portion 126 is provided in the mounting port 123, it is difficult for the slider 1252 to touch the bottom surface of the mounting port 123. Therefore, the number of thread turns is set between 1 / 4 turn and 1 / 2 turn, so that the guide column 125 can be rotated through 90°.

[0060] In a specific solution of this preferred embodiment, the jump buckle 12 includes a buckle foot 121, and the lock buckle 11 is stepped so as to include at least one limiting step 111 thereon, so that one end of the buckle foot 121 overlaps the raised step surface of the limiting step 111.

[0061] The lock buckle 11 also includes a first pivoting portion 1112 pivotally connected to a base surface of the circuit breaker and a pushing portion 116 arranged at one end of the lock buckle 11. The first pivoting portion 1112 is arranged at the other end away from the pushing portion 116. The actuator acts on the pushing portion 116 to rotate the lock buckle 11, so that the buckle foot 121 is disengaged from the limiting step 111. Specifically, the buckle foot 121 includes a side surface as a limiting surface 1211. When the buckle foot 121 overlaps the limiting step 111, the limiting step 111 is closed. The positioning surface 1211 is attached to the raised step surface of the limiting step 111; at the same time, the jump buckle 12 is L-shaped, the buckle foot 121 serves as one side of the jump buckle 12, and the corner of the jump buckle 12 includes a second pivot portion 122, so that the jump buckle 12 is also pivoted on the circuit breaker, and a mounting port 123 is provided on the surface of the other side of the jump buckle 12, which is used to connect the reset unit 128. The reset unit 128 accumulates force through elastic deformation to ensure that the jump buckle 12 is reset by the traction force of the restoring force of the reset unit 128.

[0062] At the same time, the diameter of the push rod 13 is smaller than the guide hole 115. In order to prevent the push rod 13 from interfering with the movement of the lock buckle 11 during the rotation of the lock buckle 11, the diameter of the push rod 13 is designed to be smaller than the guide hole 115, thereby making way for the movement of the lock buckle 11.

[0063] A raised convex contact surface 1251 is provided on one end surface of the guide column 125 that contacts the push rod 13. The push rod 13 is recessed inwardly corresponding to the contact end surface 131 of the push rod 13. The other end of the push rod 13 relative to the contact end surface 131 is a fixed end 132. The fixed end 132 is connected to the base surface of the circuit breaker to fix the push rod 13. When the lock buckle 11 and the jump buckle 12 are effectively connected, part of the convex contact surface 1251 extends into the contact end surface 131. The contact area is increased by the contact between the convex contact surface 1251 and the contact end surface 131, thereby reducing the pressure on the push rod 13 caused by the deformation recovery force of the push rod 13 when pushing the guide column 125 and / or the elastic part 126, thereby protecting the push rod 13 and increasing the service life of the push rod 13.

[0064] More specifically, the convex surface 1251 and the end surface 131 are adapted to be connected as a locking structure, wherein the surface of the convex surface 1251 is matched with the surface of the convex surface 1251, so that when the lock buckle 11 and the jump buckle 12 are effectively connected, part of the convex surface 1251 extends into the end surface 131, and when the push rod 13 pushes the guide column 125 to retract into the mounting opening 123, the guide column 125 rotates, so that the part of the convex surface 1251 extending into the end surface 131 interferes with the end surface 131 so that the convex surface 1251 withdraws from the recessed end surface 131, so that the guide column 125 conflicts with the end surface of the push rod 13, so that the guide column 125 withdraws from the guide hole 115 more quickly to improve the response speed.

[0065] In a preferred embodiment, the operating component 14 includes a handle portion 141 and a torsion spring 142. The handle portion 141 is transmission-connected to the trip latch 12. The torsion spring 142 acts on the handle portion 141. The handle portion 141 protrudes from the entire miniature circuit breaker so that it is exposed to the outside. The operator can hold the handle portion 141 and drive it to move, thereby driving the unhooking mechanism that has been unhooked to reset to an effectively connected state.

[0066] The miniature circuit breaker also includes a bracket 16, which is fixed on a base surface of the miniature circuit breaker, and a slide groove 161 is provided on the bracket 16; the operating component 14 includes a connecting rod 143, one end of the connecting rod 143 is pivotally connected to the handle portion 141, and the other end is slidably connected in the slide groove 161, and the movement direction of the connecting rod 143 is limited by the slide groove 161, and the trip button 12 is located on the movement path of the connecting rod 143, and the trip button 12 is driven by the movement of the connecting rod 143.

[0067] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to specific details.

Claims

1. A miniature circuit breaker, characterized in that: include: A decoupling mechanism, comprising a lock buckle (11) and a jump buckle (12) which are effectively connected and arranged; an execution component (15) for pushing the lock buckle (11) so as to disconnect it from the jump buckle (12) and complete a decoupling action; and An operating component (14) used to drive the trip buckle (12) to reset so that the unhooking mechanism that has completed the unhooking can re-establish an effective connection; The lock buckle (11) and the jump buckle (12) are positioned relative to each other via a guide post (125) and a guide hole (115), and the guide post (125) extends into the guide hole (115) to limit the relative position of the lock buckle (11) and the jump buckle (12) so as to achieve effective connection; The guide column (125) is mounted on the jump buckle (12), and the guide hole (115) is provided on the lock buckle (11); The contact end surfaces of the lock buckle (11) and the jump buckle (12) are provided with a guide hole (115) and a mounting opening (123) correspondingly, the guide column (125) is arranged in the mounting opening (123) and one end of the guide column (125) extends from the contact end surface of the jump buckle (12), so that when the lock buckle (11) and the jump buckle (12) are effectively connected, the guide column (125) extends into the guide hole (115); An elastic portion (126) is provided between the guide column (125) and a base surface of the installation opening (123); when the guide column (125) is subjected to an external force, the elastic portion (126) elastically deforms so that the guide column (125) retracts into the installation opening (123).

2. The miniature circuit breaker according to claim 1, characterized in that: A spiral groove (1231) is provided on the inner wall of the installation opening (123), and a protruding slider (1252) is provided on the side wall of the guide column (125), and the slider (1252) slides along the extension direction of the groove (1231) to rotate the guide column (125).

3. The miniature circuit breaker according to claim 1, characterized in that: It also includes a base shell (21) for receiving the components of the miniature circuit breaker; the guide hole (115) passes through two corresponding side surfaces of the lock buckle (11); A push rod (13) is provided in the guide hole (115). The push rod (13) is mounted on the base shell (21). The push rod (13) contacts the guide column (125). When the lock buckle (11) performs a decoupling action, the lock buckle (11) moves relative to the push rod (13), so that the push rod (13) pushes the guide column (125) out of the guide hole (115).

4. The miniature circuit breaker according to claim 3, characterized in that: The diameter of the push rod (13) is smaller than that of the guide hole (115).

5. The miniature circuit breaker according to claim 4, characterized in that: A matching locking portion is provided on one end of the guide column (125) that contacts the push rod (13); When the lock buckle (11) is effectively connected to the jump buckle (12), the guide column (125) is locked with the push rod (13), and when the push rod (13) pushes the guide column (125) so that the guide column (125) rotates, the guide column (125) and the push rod (13) are unlocked.

6. The miniature circuit breaker according to claim 5, characterized in that: A raised contact convex surface (1251) is provided on one end surface of the guide column (125) that contacts the push rod (13); the push rod (13) corresponds to the inward depression of the push rod (13); the contact convex surface (1251) is adaptively connected to the contact end surface (131) to serve as a locking structure; When the lock buckle (11) is effectively connected to the jump buckle (12), part of the abutting convex surface (1251) extends into the abutting end surface (131), and when the push rod (13) pushes the guide column (125) to retract into the installation opening (123), the guide column (125) rotates, so that the part of the abutting convex surface (1251) extending into the abutting end surface (131) interferes with the abutting end surface (131), so that the abutting convex surface (1251) withdraws from the recessed abutting end surface (131).

7. The miniature circuit breaker according to any one of claims 1 to 6, characterized in that: The operating component (14) comprises a handle portion (141) and a torsion spring (142); the handle portion (141) is arranged in transmission connection with the jump button (12); and the torsion spring (142) acts on the handle portion (141).

8. The miniature circuit breaker according to claim 7, characterized in that: It also includes a bracket (16) fixed on a base surface of the miniature circuit breaker, and a slide groove (161) is provided on the bracket (16); the operating component (14) includes a connecting rod (143), one end of the connecting rod (143) is pivotally connected to the handle portion (141), and the other end is slidably connected in the slide groove (161), and the trip button (12) is located on the movement path of the connecting rod (143), and the trip button (12) is driven by the movement of the connecting rod (143).

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