Pressing combination structure of miniature circuit breaker

Abstract

The utility model discloses a miniature circuit breaker pressing combination structure, and specifically relates to the miniature circuit breaker technology field, the miniature circuit breaker pressing combination structure comprises an outer shell, the top end of the outer shell is fixedly provided with a sleeve, the sleeve is internally provided with a pressing rod in a penetrating manner, the outside of the pressing rod is provided with a reset spring, the bottom end of the pressing rod is detachably provided with a bridge type moving contact, and the bridge type moving contact is provided with a movable contact. Normally closed static contacts are installed at the upper ends of the two sides in the outer shell, a connecting column is fixed to the top end of the pressing rod, and a button cap is detachably arranged at the top end of the connecting column. When the button cap is installed, the button cap is pressed downwards to enable the button cap to move downwards, the limiting block is firstly extruded and compressed into the inserting column and is not exposed, along with continuous downward movement of the button cap, when the limiting block reaches the position of the limiting groove, the outer end portion of the limiting block can be embedded into the limiting groove due to lack of blocking and restoring of the compressed spring, the button cap can be limited, and the button cap is convenient to install. The button cap is not easy to separate under the action of external force, and the button cap can be quickly replaced after being damaged.

Description

Technical Field

[0001] The utility model relates to the field of small circuit breakers, and more specifically to a press-combination structure of small circuit breakers. Background Art

[0002] Miniature circuit breakers are suitable for overload and short-circuit protection of AC 50 / 60Hz rated voltage 230 / 400V, rated current up to 63A lines. They can also be used for infrequent line operation conversion under normal circumstances. Miniature circuit breakers are mainly used in various places such as industry, commerce, high-rise and residential buildings. The push-to-connect structure is a part of the miniature circuit breaker, which can directly connect or disconnect the circuit.

[0003] At present, the push-to-connect structure presses the button cap when in use, utilizing the action of the reset spring to make the bridge-type moving contact contact with the normally open moving contact or the normally closed static contact, thereby realizing rapid on-off of the circuit. However, the existing button caps are mostly integrally formed or installed by means of threaded connections, which are prone to thread slippage or jamming, making it difficult to quickly replace the button cap after damage. Secondly, the existing bridge-type moving contacts are mostly welded and fixed at the bottom end of the pressure rod. After being used many times, the bridge-type moving contacts will be squeezed and damaged, thereby affecting the on-off of the circuit. The welding and fixing method is more troublesome when replacing. Utility Model Content

[0004] 1. Technical problems to be solved

[0005] In view of the problems existing in the prior art, the purpose of the utility model is to provide a push-to-combination structure for a small circuit breaker, which moves the button cap downward by pressing down the button cap, and the limit block is first squeezed and compressed into the plug column without leaking out. As the button cap continues to move downward, when the limit block reaches the limit groove position, there is no obstruction, and the compression spring returns to its original state, so that the outer end of the limit block can be embedded in the limit groove, thereby limiting the button cap. The structure is easy to install and is not easy to fall off when not affected by external force. After damage, the button cap can be quickly replaced.

[0006] 2. Technical solution

[0007] To solve the above problems, the utility model adopts the following technical solutions.

[0008] A miniature circuit breaker press-to-connect structure, comprising:

[0009] An outer shell, a sleeve is fixed on the top of the outer shell, a pressure rod is inserted inside the sleeve, a reset spring is arranged outside the pressure rod, and the lower end of the pressure rod extends into the inner part of the outer shell, a bridge-type moving contact is detachably installed on the bottom end of the pressure rod, normally closed static contacts are installed on the upper ends of both sides of the inner part of the outer shell, and normally open moving contacts are installed on the lower ends of both sides of the inner part of the outer shell;

[0010] A connecting column is fixed on the top end of the pressure rod, a button cap is detachably provided on the top end of the connecting column, and a limiting component is provided between the button cap and the connecting column.

[0011] Preferably, the top end of the connecting column is connected to an axially hollow plug column, the lower end surface of the button cap is provided with a slot, the plug column is inserted and matched in the slot, and the inner wall of the plug column is symmetrically provided with two limit grooves.

[0012] Preferably, the limiting assembly includes a limiting block and a compression spring, two limiting blocks are provided, and the limiting blocks penetrate the plug column, the compression spring is connected between the two limiting blocks, and the limiting block is embedded in the limiting groove.

[0013] Preferably, the middle of the upper end surface of the bridge type moving contact is connected to a threaded rod, the bottom end of the pressure rod is connected to a threaded groove, and the threaded rod is screwed and connected to the threaded groove.

[0014] Preferably, a protrusion is fixed on the outer wall of the button cap.

[0015] Preferably, the normally closed static contact and the normally open moving contact are both screwed together with connection bolts.

[0016] Preferably, wiring holes are provided on both sides of the outer shell.

[0017] 3. Beneficial effects

[0018] Compared with the prior art, the advantages of the present invention are:

[0019] (1) In this solution, by pressing the button cap downward, the button cap moves downward, and the limit block is first squeezed and compressed into the plug column without leaking out. As the button cap continues to move downward, when the limit block reaches the limit slot position, there is no obstruction, and the compression spring returns to its original state, so that the outer end of the limit block can be embedded in the limit slot, thereby limiting the button cap. The installation is convenient, and it is not easy to fall off without external force. In addition, the button cap can be quickly replaced after being damaged.

[0020] (2) In this solution, when installing the bridge type moving contact, the threaded rod can be screwed into the threaded groove, thereby abandoning the welding fixation method, which facilitates the replacement of the bridge type moving contact after damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is one of the overall structural diagrams of the utility model;

[0022] Figure 2 This is the second schematic diagram of the overall structure of the utility model;

[0023] Figure 3 It is a cross-sectional structural schematic diagram of the utility model;

[0024] Figure 4 It is a structural schematic diagram of the limit assembly of the utility model;

[0025] Figure 5 It is a schematic cross-sectional view of the button cap of the utility model;

[0026] Figure 6 It is a structural schematic diagram of the utility model in which the bridge-type moving contact and the pressure rod are separated.

[0027] Description of the numbers in the figure:

[0028] 1. Outer shell; 2. Sleeve; 3. Button cap; 4. Bump; 5. Wiring hole; 6. Connecting column; 7. Insert column; 8. Limiting assembly; 81. Limiting block; 82. Compression spring; 9. Bridge type moving contact; 10. Normally closed static contact; 11. Normally open moving contact; 12. Wiring bolt; 13. Pressure rod; 14. Reset spring; 15. Slot; 16. Limiting groove; 17. Threaded groove; 18. Threaded rod. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention specification; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field without creative work based on the embodiments of the present invention are within the scope of protection of the present invention.

[0030] Figure 1 and Figure 2 All of them are schematic diagrams of the overall structure of the utility model, and combined with Figure 3 As shown, the push-to-connect structure of the miniature circuit breaker includes an outer shell 1, and a window that can be opened and closed can be set at the bottom end of the outer shell 1, and maintenance and other operations can be performed on the inside of the outer shell 1 through the window. A sleeve 2 is fixed at the top of the outer shell 1, and a pressure rod 13 is inserted inside the sleeve 2. A reset spring 14 is arranged outside the pressure rod 13, and the lower end of the pressure rod 13 extends to the inside of the outer shell 1. A bridge-type moving contact 9 is detachably installed at the bottom end of the pressure rod 13, and the detachably connected bridge-type moving contact 9 is convenient for its replacement. Normally closed static contacts 10 are installed at the upper ends of both sides of the inner side of the outer shell 1. , and the lower ends of both sides inside the outer shell 1 are installed with normally open moving contacts 11, and the normally closed static contacts 10 and the normally open moving contacts 11 are screwed and connected with wiring bolts 12. Both sides of the outer shell 1 are provided with wiring holes 5, and wiring is carried out through the wiring bolts 12. The connected wires can pass through the wiring holes 5. A connecting column 6 is fixed to the top of the pressure rod 13, and a button cap 3 is detachably provided on the top of the connecting column 6. A limit assembly 8 is provided between the button cap 3 and the connecting column 6. The limit assembly 8 is used to ensure the stability of the button cap 3 after installation to prevent it from slipping when not affected by external force.

[0031] See also Figure 2 and Figure 5 As shown, the top of the connecting column 6 is connected to an axially hollow plug column 7, the lower end surface of the button cap 3 is provided with a slot 15, the plug column 7 is inserted and matched in the slot 15, and the inner wall of the plug column 7 is symmetrically provided with two limit grooves 16.

[0032] See also Figure 4 and Figure 5 As shown, the limit assembly 8 includes a limit block 81 and a compression spring 82. Two limit blocks 81 are provided, and the limit blocks 81 pass through the plug column 7. The compression spring 82 is connected between the two limit blocks 81, and the limit block 81 is embedded in the limit groove 16. When the compression spring 82 is in a natural state, the outer end of the limit block 81 protrudes outward from the plug column 7, and the outer end of the limit block 81 is an arc surface, which is convenient for applying force in and out of the limit groove 16.

[0033] Based on the above technical solutions:

[0034] When installing the button cap 3, first align the slot 15 on the lower end face of the button cap 3 with the plug post 7, and then press down the button cap 3. As the button cap 3 moves downward, the limit block 81 is first squeezed and compressed into the plug post 7 without leaking out. As the button cap 3 continues to move downward, when the limit block 81 reaches the limit groove 16, there is no obstruction, and the compression spring 82 returns to its original state, allowing the outer end of the limit block 81 to be embedded in the limit groove 16, thereby limiting the button cap 3. The installation is convenient and it is not easy to fall off without external force.

[0035] When removing the button cap 3, just pull up the button cap 3 with a little force.

[0036] Further, see Figure 1 As shown, a projection 4 is fixed to the outer wall of the button cap 3 .

[0037] Specifically, when the button cap 3 is pulled upward, the projection 4 is used to facilitate hand force application and reduce the occurrence of hand slippage.

[0038] In addition, see Figure 6 As shown, the middle of the upper end surface of the bridge type moving contact 9 is connected to a threaded rod 18 , the bottom end of the pressure rod 13 is connected to a threaded groove 17 , and the threaded rod 18 is screwed and connected to the threaded groove 17 .

[0039] Through the above, when installing the bridge type moving contact 9, it is sufficient to screw the threaded rod 18 into the threaded groove 17, thereby abandoning the welding fixation method, and facilitating replacement after damage.

[0040] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A miniature circuit breaker press-to-connect structure, characterized in that: include: An outer shell (1), wherein a sleeve (2) is fixed at the top end of the outer shell (1), a pressure rod (13) is inserted into the sleeve (2), a return spring (14) is arranged outside the pressure rod (13), and the lower end of the pressure rod (13) extends into the inner part of the outer shell (1), a bridge-type moving contact (9) is detachably mounted at the bottom end of the pressure rod (13), normally closed static contacts (10) are mounted at the upper ends of both sides of the inner part of the outer shell (1), and normally open moving contacts (11) are mounted at the lower ends of both sides of the inner part of the outer shell (1); A connecting column (6) is fixed to the top of the pressure rod (13), a button cap (3) is detachably provided at the top of the connecting column (6), and a limiting component (8) is provided between the button cap (3) and the connecting column (6).

2. A miniature circuit breaker press-to-connect structure according to claim 1, characterized in that: The top end of the connecting column (6) is connected to an axially hollow plug column (7), the lower end surface of the button cap (3) is provided with a slot (15), the plug column (7) is inserted and matched with the slot (15), and the inner wall of the plug column (7) is symmetrically provided with two limit grooves (16).

3. A miniature circuit breaker press-to-connect structure according to claim 2, characterized in that: The limiting assembly (8) comprises a limiting block (81) and a compression spring (82), two limiting blocks (81) are provided, and the limiting assembly (8) passes through the plug column (7), the compression spring (82) is connected between the two limiting blocks (81), and the limiting block (81) is embedded and matched with the limiting groove (16).

4. The miniature circuit breaker press-to-connect structure according to claim 1, characterized in that: The middle of the upper end surface of the bridge type moving contact (9) is connected to a threaded rod (18), the bottom end of the pressure rod (13) is connected to a threaded groove (17), and the threaded rod (18) is screwed and connected to the threaded groove (17).

5. The miniature circuit breaker press-to-connect structure according to claim 1, characterized in that: A protrusion (4) is fixed to the outer wall of the button cap (3).

6. The miniature circuit breaker press-to-connect structure according to claim 1, characterized in that: The normally closed static contact (10) and the normally open moving contact (11) are both screwed together with connection bolts (12).

7. The miniature circuit breaker press-to-connect structure according to claim 1, characterized in that: Wiring holes (5) are provided on both sides of the outer shell (1).

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