Three-phase protector with manual reset function

Abstract

The utility model discloses a three-phase protector with a manual reset function, which comprises a main body, a temperature sensing assembly, a lever assembly, a wiring terminal, a connecting bridge, a short push rod and a reset rod, when the temperature sensing assembly detects that the temperature reaches a specified value, liquid in the temperature sensing assembly is heated to expand and downwards pushes an upper lever, the upper lever drives a lower lever to downwards press the short push rod, and the short push rod is reset. The short push rod simultaneously presses the connecting bridge, so that the two ends of the connecting bridge are respectively disconnected with the first bent terminal and the second bent terminal, and at the moment, the reset rod presses the lower lever; when the temperature begins to drop, the liquid in the temperature sensing assembly is not heated to expand any more, so that the temperature sensing assembly relieves downward pressing of the upper lever, meanwhile, the reset rod is pulled outwards, the reset rod does not press the lower lever downwards any more, the short push rod and the connecting bridge are reset, and then the circuit is connected. Otherwise, the reset rod cannot be electrified, so that the safety of the protection electric appliance is improved, and the requirement of the market on the product safety is met.

Description

Technical Field

[0001] The utility model relates to the technical field of thermostats, and particularly to a three-phase protector with a manual reset function. Background Art

[0002] Protectors are widely used in electrical appliances such as water heaters and rice cookers that have certain requirements for temperature. Under normal working conditions, the circuit is connected so that the circuit can work normally; when the temperature sensing component of the protector detects that the temperature exceeds the specified range, the protector disconnects the circuit to achieve electrical protection. Usually, after the temperature drops, the protector is reset and powered on again; however, the protectors on the current market can also be powered on through forced reset even when the temperature has not dropped, which will cause damage to the electrical appliances and pose potential safety hazards, not meeting the market requirements for product safety. Content of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a three-phase protector with a manual reset function, which includes a main body, a temperature sensing component, a lever component, a terminal block, a connection bridge, a short push rod, and a reset rod; a base is installed at the bottom of the main body; the temperature sensing component is installed inside the main body, and the temperature sensing component is used to detect temperature; the lever component is installed inside the main body, and the lever component includes an upper lever, a lower lever, and a flipping spring. The upper lever is located above the lower lever, and the flipping spring is connected between the upper lever and the lower lever. The temperature sensing component presses the upper lever downward, and the lower lever presses the short push rod downward; the terminal block is installed inside the base, and the terminal block includes a first bent terminal and a second bent terminal; the connection bridge is installed in the base in a lifting manner, and both ends of the connection bridge are in contact with or disconnected from the first bent terminal and the second bent terminal respectively; the short push rod is installed between the lever component and the connection bridge, and the lever component pushes the short push rod downward to disconnect the connection bridge from the first bent terminal and the second bent terminal; the reset rod is inserted into the main body, and after the reset rod is pulled, the upper lever and the lower lever are reset.

[0004] The utility model has at least the following beneficial effects:

[0005] 1. When the temperature sensing component detects that the temperature reaches the specified value, the liquid in the temperature sensing component expands due to heat and pushes the upper lever downward. The upper lever drives the lower lever to press the short push rod downward, and the short push rod simultaneously presses the connection bridge downward, so that both ends of the connection bridge are disconnected from the first bent terminal and the second bent terminal respectively, thereby disconnecting the circuit. At this time, the reset rod presses the lower lever;

[0006] 2. When the electrical fault is excluded and the temperature starts to drop, and the circuit needs to be connected again, the liquid in the temperature sensing component is no longer heated and expanded, so that the temperature sensing component releases the downward pressing on the upper lever, and at the same time pulls the reset rod outwards, so that the reset rod no longer presses the lower lever. The lower lever is reset by the flipping spring, so that the short push rod and the connecting bridge are reset, so that the two ends of the connecting bridge are respectively in contact with the first bent terminal and the second bent terminal again, thereby making the circuit connected. Therefore, this protector must be cooled to a certain temperature before the reset rod can be manually pulled to achieve effective power-on of the circuit. Otherwise, it cannot be powered on, which improves the safety of protecting the electrical appliance and meets the market requirements for product safety.

[0007] According to some embodiments of the present invention, the first bent terminal is provided with a first contact, the second bent terminal is provided with a second contact, the connecting bridge is provided with a third contact and a fourth contact, the third contact is in contact with or disconnected from the first contact, and the fourth contact is in contact with or disconnected from the second contact;

[0008] According to some embodiments of the present invention, the lever assembly includes an upper lever, a lower lever, and a flipping spring. The upper lever is located above the lower lever, the lower lever is located above the short push rod, and the flipping spring is connected between the upper lever and the lower lever.

[0009] According to some embodiments of the present invention, the lever assembly further includes a bottom plate, the bottom plate is installed at the bottom of the main body, a first through hole is opened on the bottom plate, and the top end of the short push rod passes through the first through hole; the left end of the upper lever is fixed on the bottom plate, and the right end of the lower lever is fixed on the bottom plate.

[0010] According to some embodiments of the present invention, the temperature sensing component includes a diaphragm box, a diaphragm handle, an adjusting shaft, and a diaphragm box boss. The diaphragm box is located above the connecting bridge, the diaphragm box boss is arranged on the bottom surface of the diaphragm box, the lower end of the diaphragm handle is in contact with the inner diaphragm of the diaphragm box, and the adjusting shaft is connected to the diaphragm handle.

[0011] According to some embodiments of the present invention, a capillary tube is installed on the diaphragm handle, and the capillary tube is connected to a temperature sensing cylinder.

[0012] According to some embodiments of the present invention, a switch spring is press-fitted below the connecting bridge.

[0013] According to some embodiments of the present invention, the reset rod includes a rod body and a convex ring portion. The convex ring portion is arranged at the end of the rod body, a reset spring is sleeved on the rod body, and the reset spring is located between the convex ring portion and the inner wall of the main body.

[0014] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. Brief Description of the Drawings

[0015] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0016] Figure 1 is an overall schematic diagram of an embodiment of the present utility model;

[0017] Figure 2 is an overall internal side view schematic diagram of an embodiment of the present utility model;

[0018] Figure 3 is a schematic diagram of a reset rod in a circuit-disconnected state of an embodiment of the present utility model;

[0019] Figure 4 is a schematic diagram of a reset rod in a circuit-connected state of an embodiment of the present utility model. Detailed Description of the Embodiments

[0020] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for explaining the present utility model and should not be construed as limiting the present utility model.

[0021] Referring to Figures 1 to 2 as shown, a three-phase protector with a manual reset function includes a main body 100, a temperature sensing component 300, a lever assembly 400, a terminal block, a connection bridge 700, a short push rod 800, and a reset rod 900; a base 200 is installed at the bottom of the main body 100; the temperature sensing component 300 is installed inside the main body 100 and is used to detect temperature; the lever assembly 400 is installed inside the main body 100, and the lever assembly 400 includes an upper lever 410, a lower lever 420, and a flipping spring 430. The upper lever 410 is located above the lower lever 420. The temperature sensing component 300 presses down on the upper lever 410. The lower lever 420 is located above the short push rod 800. The flipping spring 430 is connected between the upper lever 410 and the lower lever 420. The flipping spring 430 can limit the upper lever 410. On the other hand, the flipping spring 430 can enable the upper lever 410 to have a certain amount of movement margin, which is conducive to the upper lever 410 moving in the direction of the lower lever 420, and resetting the upper lever 410 through the flipping spring 430, and causing the lower lever 420 to press down on the short push rod 800.

[0022] The terminal is installed inside the base 200. The terminal includes a first bent terminal 500 and a second bent terminal 600. The connection bridge 700 is installed in the base 200 in a lifting manner, and both ends of the connection bridge 700 are respectively in contact with or disconnected from the first bent terminal 500 and the second bent terminal 600. The short push rod 800 is installed between the lever assembly 400 and the connection bridge 700. The lever assembly 400 pushes the short push rod 800 downward to disconnect the connection bridge 700 from the first bent terminal 500 and the second bent terminal 600. The reset rod 900 is inserted into the main body 100. After the reset rod 900 is pulled, the upper lever 410 and the lower lever 420 are reset.

[0023] When the temperature sensing component 300 detects that the temperature reaches the specified value, the liquid inside the temperature sensing component 300 expands due to heat and pushes the upper lever 410 downward. The upper lever 410 drives the lower lever 420 to press the short push rod 800 downward. The short push rod 800 simultaneously presses the connection bridge 700 downward, causing both ends of the connection bridge 700 to be disconnected from the first bent terminal 500 and the second bent terminal 600 respectively, thereby disconnecting the circuit. At this time, the reset rod 900 presses the lower lever 420 downward;

[0024] When the electrical fault is eliminated and the temperature begins to drop, and when the circuit needs to be connected again, the liquid inside the temperature sensing component 300 no longer expands due to heat, causing the temperature sensing component 300 to release the downward pressing on the upper lever 410. At the same time, the reset rod 900 is pulled outward, so that the reset rod 900 no longer presses the lower lever 420 downward. The lower lever 420 is reset through the flipping spring, causing the short push rod 800 and the connection bridge 700 to be reset, and both ends of the connection bridge 700 are respectively in contact with the first bent terminal 500 and the second bent terminal 600 again, thereby connecting the circuit. This makes it necessary for this protector to manually pull the reset rod 900 only when the temperature drops to a certain level to achieve effective power-on of the circuit. Otherwise, power-on is not possible, improving the safety of protecting the electrical appliance to meet the market requirements for product safety.

[0025] Refer to Figure 2 As shown, the first bent terminal 500 is provided with a first contact 510, the second bent terminal 600 is provided with a second contact 610, and the connection bridge 700 is provided with a third contact 710 and a fourth contact 720. The third contact 710 is in contact with or disconnected from the first contact 510, and the fourth contact 720 is in contact with or disconnected from the second contact 610;

[0026] Refer to Figure 2 As shown, the lever assembly 400 further includes a bottom plate 440. The bottom plate 440 is installed at the bottom of the main body 100. A first through hole 441 is opened on the bottom plate 440, and the top end of the short push rod 800 passes through the first through hole 441. The left end of the upper lever 410 is fixed to the bottom plate 440, and the right end of the lower lever 420 is fixed to the bottom plate 440.

[0027] Refer to Figure 2As shown in the figure, the temperature sensing component 300 includes a bellows 310, a bellows stem 320, an adjusting shaft 330, and a bellows boss 340. The bellows 310 is located above the connecting bridge 700. The bellows boss 340 is provided on the bottom surface of the bellows 310. The lower end of the bellows stem 320 is in contact with the inner diaphragm of the bellows 310. The adjusting shaft 330 is connected to the bellows stem 320. A capillary 350 is installed on the bellows stem 320, and the capillary 350 is connected to a temperature sensing cylinder 360.

[0028] Referring to Figure 2 As shown in the figure, the reset rod 900 includes a rod body 910 and a convex ring portion 920. The convex ring portion 920 is provided at the end of the rod body 910. A reset spring 930 is sleeved on the rod body 910, and the reset spring 930 is located between the convex ring portion 920 and the inner wall of the main body 100.

[0029] Referring to Figure 4 As shown in the figure, when the temperature sensing cylinder 360 detects that the temperature reaches the specified value, the liquid in the temperature sensing cylinder 360 expands due to heat and pushes the bellows 310. The bellows 310 exerts a thrust on the bellows boss 340, and at the same time causes the bellows boss 340 to push the upper lever 410 to move. The upper lever 410 pushes the lower lever 420, causing the lower lever 420 to press down the short push rod 800. The short push rod 800 pushes the connecting bridge 700, so that the third contact 710 is disconnected from the first contact 510, and the fourth contact 720 is disconnected from the second contact 610, causing the connection between the first bent terminal 500 and the second bent terminal 600 to be disconnected, and further causing the circuit to be disconnected. At the same time, the connecting bridge 700 presses down the switch spring 730. At this time, under the action of the reset spring 930, the reset rod 900 is pushed above the lower lever 420, and the convex ring portion 920 keeps the state of pressing down the short push rod 800.

[0030] Referring to Figure 3 As shown in the figure, when the circuit needs to be connected again, pull the reset rod 900 to make the convex ring portion 920 leave the lower lever 420. The connecting bridge 700 resets under the action of the switch spring 730, so that the third contact 710 contacts the first contact 510, the fourth contact 720 contacts the second contact 610, and the reset spring 930 is compressed by the convex ring portion 920.

[0031] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the knowledge scope of those of ordinary skill in the art in the said technical field, various changes can be made without departing from the purpose of the present invention.

Claims

1. A three-phase protector with a manual reset function, characterized in that, Comprising: A main body (100) with a base (200) installed at the bottom thereof; A temperature sensing component (300) installed inside the main body (100), and the temperature sensing component (300) is used to detect temperature; A lever assembly (400) installed inside the main body (100), the lever assembly (400) includes an upper lever (410), a lower lever (420), and a flip spring (430), the upper lever (410) is located above the lower lever (420), the flip spring (430) is connected between the upper lever (410) and the lower lever (420), and the temperature sensing component (300) presses down on the upper lever (410); A terminal block installed inside the base (200), and the terminal block includes a first bent terminal (500) and a second bent terminal (600); A connection bridge (700) installed in the base (200) in a lifting manner, and both ends of the connection bridge (700) are in contact with or disconnected from the first bent terminal (500) and the second bent terminal (600) respectively; A short push rod (800) installed between the lever assembly (400) and the connection bridge (700), the lever assembly (400) pushes down the short push rod (800), and the lower lever (420) presses down on the short push rod (800) to disconnect the connection bridge (700) from the first bent terminal (500) and the second bent terminal (600); A reset rod (900) inserted into the main body (100), and by pulling the reset rod (900), the upper lever (410) and the lower lever (420) are reset.

2. The three-phase protector with a manual reset function according to claim 1, characterized in that, The first bent terminal (500) is provided with a first contact (510), the second bent terminal (600) is provided with a second contact (610), the connection bridge (700) is provided with a third contact (710) and a fourth contact (720), the third contact (710) is in contact with or disconnected from the first contact (510), and the fourth contact (720) is in contact with or disconnected from the second contact (610).

3. The three-phase protector with a manual reset function according to claim 1, characterized in that, The lever assembly (400) further includes a bottom plate (440) installed at the bottom of the main body (100), a first through hole (441) is formed on the bottom plate (440), and the top end of the short push rod (800) passes through the first through hole (441); the left end of the upper lever (410) is fixed to the bottom plate (440), and the right end of the lower lever (420) is fixed to the bottom plate (440).

4. A three-phase protector with a manual reset function according to claim 1, characterized in that, The temperature sensing component (300) includes a diaphragm box (310), a diaphragm stem (320), an adjusting shaft (330), and a diaphragm box boss (340). The diaphragm box (310) is located above the connecting bridge (700). The diaphragm box boss (340) is provided on the bottom surface of the diaphragm box (310). The lower end of the diaphragm stem (320) is in contact with the inner diaphragm of the diaphragm box (310). The adjusting shaft (330) is connected to the diaphragm stem (320).

5. A three-phase protector with a manual reset function according to claim 4, characterized in that, A capillary tube (350) is installed on the diaphragm stem (320), and the capillary tube (350) is connected to a temperature sensing cylinder (360).

6. The three-phase protector with a manual reset function according to claim 1, characterized in that, A switch spring (730) is press-fitted below the connecting bridge (700).

7. A three-phase protector with a manual reset function according to claim 1, characterized in that, The reset rod (900) includes a rod body (910) and a convex ring portion (920). The convex ring portion (920) is provided at the end of the rod body (910). A reset spring (930) is sleeved on the rod body (910), and the reset spring (930) is located between the convex ring portion (920) and the inner wall of the main body (100).

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