Current detection protection device and method

Abstract

The present application relates to a current detection protection device and method, the device comprising: a main body, comprising a plug and a fixture, the plug comprising a first pin and a second pin; a protection switch, comprising a conductive sheet, a connecting rod, a first spring and a wire unit, the wire unit being provided with a coil, and the conductive sheet being connected to the wire unit, and one end of the connecting rod being rotatably connected to the fixture, the other end of the connecting rod being a free end, one end of the first spring being connected to the fixture, and the other end of the first spring being connected to the middle of the connecting rod; a reset mechanism, comprising a reset frame, a rocker, a second spring and a third spring, the reset frame comprising a connecting hole, when the first pin passes through the connecting hole, the rocker is magnetically attracted to the coil and displaced, one end of the second spring being connected to the rocker, the other end of the second spring being connected to the fixture, one end of the third spring being connected to the reset frame, the other end of the third spring being connected to the fixture, and the reset frame and the rocker being detachably connected.

Description

Technical Field

[0001] The present application relates to the field of detection technology, and in particular to a current detection protection device and method. Background Art

[0002] In the automotive industry, quiescent current is particularly important for vehicle performance and also affects the vehicle's power consumption while at rest. Excessive quiescent current can lead to severe power outages after a period of inactivity, preventing the vehicle from starting and creating a negative user experience. Therefore, controlling and monitoring quiescent current is crucial.

[0003] During the automotive design and production process, controller quiescent current requirements are typically in the milliampere range, with some even requiring microamperes. However, currently available quiescent current meters have narrow ranges, such as 0-3 amps or 0-1 amp. However, the operating current of most controllers is relatively high, and the operating current of the entire vehicle is often tens of amps, even reaching around 150 amps during engine startup. Therefore, during testing, a quiescent current meter cannot be connected directly to the device under test. Instead, the meter must be connected in series with the device after the vehicle enters sleep mode. Furthermore, when connecting a quiescent current meter, the excessive quiescent current can easily burn out the meter. Summary of the Invention

[0004] Based on this, a current detection protection device and method are provided to solve the problem in the prior art that current detection is prone to damage the electric meter.

[0005] The present invention provides a current detection protection device, the device comprising:

[0006] The body includes a plug and a fixture, wherein the plug includes a first pin and a second pin;

[0007] A protective switch, comprising a conductive sheet, a connecting rod, a first spring, and a wire unit, wherein the wire unit is provided with a coil, and the conductive sheet is connected to the wire unit, one end of the connecting rod is rotatably connected to the jig, and the other end of the connecting rod is a free end, one end of the first spring is connected to the jig, and the other end of the first spring is connected to the middle portion of the connecting rod, when the first spring is compressed, the free end of the connecting rod is disconnected from the wire unit, and when the first spring is in a natural state, the free end of the connecting rod is electrically connected to the wire unit;

[0008] A reset mechanism includes a reset frame, a rocker, a second spring, and a third spring. The reset frame includes a connection hole. The first pin matches the size of the connection hole, and the second pin is larger than the connection hole. When the first pin passes through the connection hole, the first pin is electrically connected to the conductive sheet and guides the rotation of the connecting rod. The rocker is magnetically attracted to the coil and displaced. One end of the second spring is connected to the rocker, and the other end of the second spring is connected to the jig. One end of the third spring is connected to the reset frame, and the other end of the third spring is connected to the jig. The reset frame and the rocker are detachably connected. Optionally, one end of the connecting rod is also electrically connected to the wire unit.

[0009] Before the connecting rod rotates, the free end of the connecting rod is electrically connected to the wire unit, and after the connecting rod rotates, the free end of the connecting rod is disconnected from the wire unit.

[0010] Optionally, an insulating sheet is provided on the connecting rod, and the position of the insulating sheet is configured as the connection point where the first pin guides the connecting rod to rotate.

[0011] Optionally, the first pin and the second pin are configured as stepped shafts, and the diameter of the first pin is smaller than that of the second pin.

[0012] Optionally, both the first pin and the second pin are electrically connected to an electric meter.

[0013] Optionally, a first buckle is provided on the reset frame, and a second buckle is provided on the rocker. The first buckle and the second buckle are detachably connected, and the opening directions of the first buckle and the second buckle are opposite.

[0014] Optionally, the rocker is magnetic, and the extension direction of the second spring is consistent with the extension direction of the coil center.

[0015] The present invention provides a current detection protection method, which uses the current detection protection device described above, and the method includes:

[0016] Connecting the conductor unit in series with the device under test;

[0017] Passing the first pin through the reset frame and electrically connecting it to the conductive sheet;

[0018] Connecting the electric meter to the plug and electrically connecting it to the first pin;

[0019] guiding the first pin to compress the first spring and rotate the connecting rod to disconnect the connecting rod from the wire unit;

[0020] The first pin is guided to compress the third spring, thereby connecting and locking the reset frame and the rocker.

[0021] Optionally, the electric meter is connected to the plug and electrically connected to the first pin, further comprising:

[0022] When the current of the device under test is greater than or equal to a safety threshold, the joystick and the coil are magnetically attracted to each other, and the electric meter is stopped from being connected to the plug.

[0023] Optionally, guiding the first pin to compress the third spring to connect the reset frame and the rocker further includes:

[0024] When the current of the device under test is greater than or equal to the safety threshold, the rocker and the coil are magnetically attracted to each other, the rocker is displaced toward the coil, and the rocker is disengaged from and unlocked from the reset frame. Under the reset force of the third spring, the reset frame pops out the electric meter.

[0025] The above current detection protection device and method,

[0026] First contact with the conductive sheet, then disconnect the connecting rod and the wire unit, to avoid unstable contact causing line on / off changes, thereby waking up the entire vehicle network and causing excessive current;

[0027] When the current in the circuit of the device under test is large, the joystick is attracted by the magnet and is in an adsorbed state. When the plug is inserted, the reset frame will pop out, which can effectively remind the user that the current is too large and it is not suitable to connect the meter.

[0028] Effectively protect the meter from being burned out during testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the structure of a current detection protection device connected to an electric meter in one embodiment;

[0030] Figure 2 This is a structural diagram of another embodiment in which the current detection protection device is not connected to the electric meter;

[0031] Figure 3 FIG. 4 is a flow chart of a current detection protection method in another embodiment.

[0032] 1-electricity meter, 121-plug, 122-fixture, 2-pin, 21-second pin, 22-first pin, 3-reset frame, 4-conductive sheet, 5-connecting rod, 6-coil, 7-first spring, 8-first buckle, 9-rocker, 10-third spring, 11-second spring, 141-first wire, 142-second wire, 143-third wire. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0034] It should be noted that the illustrations provided in this embodiment are only used to schematically illustrate the basic concept of the present invention. Therefore, the illustrations only show components related to the present invention and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0035] The structures, proportions, sizes, etc. depicted in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not intended to limit the conditions under which the present invention can be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportional relationships, or adjustments in size should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and objectives that can be achieved by the present invention.

[0036] Terms such as "upper," "lower," "left," "right," "center," "longitudinal," "transverse," "horizontal," "inner," "outer," "radial," and "circumferential" used in this specification to indicate positions or locations are based on those shown in the accompanying drawings and are intended solely for ease of description. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and are therefore not to be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

[0037] See also Figure 1 as well as Figure 2 The present invention provides a current detection protection device, the device comprising:

[0038] The main body includes a plug 121 and a fixture 122, wherein the plug 121 includes a first pin 22 and a second pin 21;

[0039] A protective switch includes a conductive sheet 4, a connecting rod 5, a first spring 7, and a wire unit. The wire unit is provided with a coil 6, and the conductive sheet 4 is connected to the wire unit. One end of the connecting rod 5 is rotatably connected to the jig 122, and the other end of the connecting rod 5 is a free end. One end of the first spring 7 is connected to the jig 122, and the other end of the first spring 7 is connected to the middle of the connecting rod 5. When the first spring 7 is compressed, the free end of the connecting rod 5 is disconnected from the wire unit. When the first spring 7 is in a natural state, the free end of the connecting rod 5 is electrically connected to the wire unit.

[0040] The reset mechanism includes a reset frame 3, a rocker 9, a second spring 11 and a third spring 10. The reset frame includes a connecting hole, the first pin matches the size of the connecting hole, and the size of the second pin is larger than the connecting hole. When the first pin 22 passes through the connecting hole, the first pin 22 is electrically connected to the conductive sheet 4 and guides the connecting rod 5 to rotate. The rocker 9 is magnetically attracted to the coil 6 and displaced. One end of the second spring 11 is connected to the rocker 9, and the other end of the second spring 11 is connected to the jig 122. One end of the third spring 10 is connected to the reset frame 3, and the other end of the third spring 10 is connected to the jig 122. The reset frame 3 and the rocker 9 are detachably connected.

[0041] like Figure 2 As shown, before the electric meter 1 is connected to the device under test, the fixture 122 can be connected in series to the device under test. The diameter of the second pin 21 is larger than the pin socket on the reset frame 3, so that the reset frame 3 limits the freedom of movement of the second pin 21 toward the conductive sheet 4. The first pin 22 is disconnected from the conductive sheet 4, and the device under test is connected through the first wire 141, the second wire 142, and the third wire 143.

[0042] When the electric meter 1 is used to test the device to be tested, the plug 121 can be pressed, and the first pin 22 penetrates the reset frame 3, thereby driving the pin 2 to move. The plug 121 is continued to be pressed to connect the first pin 22 with the conductive sheet 4 and connect the electric meter 1. After the first pin 22 contacts the connecting rod 5, the connecting rod 5 is rotated and the first spring 7 is compressed to disconnect the free end of the connecting rod 5 from the first wire 141. The first wire 141, the electric meter 1 and the second wire 142 are connected. The plug 121 is continued to be pressed to compress the third spring 10 so that the third spring 10 contracts, and the reset frame 3 is connected to the rocker 9 and locked. A prompt sound indicating that the reset frame 3 and the rocker 9 are connected is issued, such as a "click" sound, to guide the tester to connect the electric meter 1.

[0043] When the current of the device under test is too large (greater than or equal to the safety threshold) during the detection process of the device under test, the magnetic induction intensity of the coil 6 increases, and the coil 6 produces a magnetic attraction effect on the rocker 9, causing the rocker 9 to disengage and unlock from the reset frame 3, thereby releasing the elastic potential energy of the first spring 7 and the third spring 10. Driven by the elastic potential energy, the reset frame 3 pops out the electric meter 1, the first pin 22 is disconnected from the conductive sheet 4, and the device under test is connected through the first wire 141, the second wire 142 and the third wire 143.

[0044] When the current of the device under test is too large (greater than or equal to the safety threshold) during the process of connecting to the electric meter 1, the magnetic induction intensity of the coil 6 increases, producing a magnetic attraction on the rocker 9. Under the magnetic attraction, the rocker 9 and the coil 6 are attracted, and then the rocker 9 and the reset frame 3 will not be connected or locked, and the corresponding prompt sound cannot be generated, thereby guiding the tester to stop connecting to the electric meter 1.

[0045] In some embodiments, the connecting rod 5 can be structurally optimized and designed, and one end of the connecting rod 5 is also electrically connected to the wire unit; before the connecting rod 5 rotates, the free end of the connecting rod 5 is electrically connected to the wire unit, the first pin 22 is disconnected from the conductive sheet 4, and the device under test is connected through the first wire 141, the second wire 142 and the third wire 143; after the connecting rod 5 rotates, the free end of the connecting rod 5 is disconnected from the wire unit, that is, the free end of the connecting rod 5 is disconnected from the first wire 141, and the first wire 141, the electric meter 1 and the second wire 142 are connected.

[0046] In order to provide overcurrent and overvoltage protection, an insulating sheet is provided on the connecting rod 5. The position of the insulating sheet is configured to be the connection point where the first pin 22 guides the connecting rod 5 to rotate. When the first pin 22 drives the connecting rod to rotate, the free end of the connecting rod 5 can be disconnected from the first wire 141, and the first wire 141, the electric meter 1 and the second wire 142 can be ensured to be connected.

[0047] In some embodiments, the first pin 22 and the second pin 21 are configured as stepped shafts, and the diameter of the first pin 22 is smaller than that of the second pin 21 . The first pin 22 can penetrate the reset frame 3 , and the second pin 21 can limit the freedom of movement of the plug 121 .

[0048] In order to achieve circuit conduction and ensure that the first wire 141 , the electric meter 1 and the second wire 142 are connected, the first pin 22 and the second pin 21 are electrically connected to the electric meter 1 .

[0049] To provide elastic potential energy to eject the meter 1 when the current is too high, thereby protecting the meter 1, the reset frame 3 is provided with a first latch 8, and the rocker 9 is provided with a second latch. The first and second latches are detachably connected, and the openings of the first and second latches are in opposite directions. When the meter 1 is connected, the first and second latches can be connected and locked, and a sound prompting the connection between the reset frame 3 and the rocker 9, such as a "click," is emitted to guide the tester to connect the meter 1 and limit the release of the stored elastic potential energy. When the current is too high, the first and second latches disengage and unlock, releasing the elastic potential energy and ejecting the meter 1.

[0050] In order to ensure that the rocker 9 is separated from the reset frame 3 when the current of the device under test is too large, the rocker 9 is configured to be magnetic, and the extension direction of the second spring 11 is consistent with the extension direction of the center of the coil 6. When the current is too large, the magnetic attraction generated by the coil 6 can separate the reset frame 3 from the rocker 9 and unlock it.

[0051] like Figure 1 、 2 As shown in FIG. 3 , the present invention provides a current detection protection method, using the current detection protection device, the method comprising:

[0052] S1: Connecting the conductor unit in series with the device under test;

[0053] S2: Insert the first pin 22 through the reset frame 3 and electrically connect it to the conductive sheet 4;

[0054] S3: Connect the electric meter 1 to the plug 121 and electrically connect it to the first pin 22;

[0055] S4: guiding the first pin 22 to compress the first spring 7 and rotate the connecting rod 5 to disconnect the connecting rod 5 from the wire unit;

[0056] S5: The first pin 22 is guided to compress the third spring 10, thereby connecting and locking the reset frame 3 and the rocker 9. A prompt sound, such as a "click" sound, indicating that the reset frame 3 and the rocker 9 are connected is emitted to guide the tester to connect the electric meter 1.

[0057] In S31, the electric meter 1 is connected to the plug 121 and electrically connected to the first pin 22, and further includes:

[0058] When the current of the device under test is greater than or equal to the safety threshold, the rocker 9 and the coil 6 are magnetically attracted, and the rocker 9 and the reset frame 3 are not connected or locked, and the corresponding prompt sound cannot be generated, thereby guiding the tester to stop connecting the electric meter 1 to the plug 121.

[0059] In some embodiments, guiding the first pin 22 to compress the third spring 10 to connect the reset frame 3 and the rocker 9 further includes:

[0060] S6: When the current of the device under test is greater than or equal to the safety threshold, the rocker 9 is magnetically attracted to the coil 6, the rocker 9 is displaced toward the coil 6, and the rocker 9 is disengaged from the reset frame 3 and unlocked. Under the reset force of the third spring 10, the reset frame 3 pops out the electric meter 1.

[0061] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A current detection protection device, characterized in that: The device comprises: The body includes a plug and a fixture, wherein the plug includes a first pin and a second pin; A protective switch, comprising a conductive sheet, a connecting rod, a first spring, and a wire unit, wherein the wire unit is provided with a coil, and the conductive sheet is connected to the wire unit, one end of the connecting rod is rotatably connected to the jig, and the other end of the connecting rod is a free end, one end of the first spring is connected to the jig, and the other end of the first spring is connected to the middle portion of the connecting rod, when the first spring is compressed, the free end of the connecting rod is disconnected from the wire unit, and when the first spring is in a natural state, the free end of the connecting rod is electrically connected to the wire unit; The reset mechanism includes a reset frame, a rocker, a second spring and a third spring. The reset frame includes a connecting hole. The first pin matches the size of the connecting hole, and the second pin is larger than the connecting hole. When the first pin passes through the connecting hole, the first pin is electrically connected to the conductive sheet and guides the connecting rod to rotate. The rocker is magnetically attracted to the coil and displaced. One end of the second spring is connected to the rocker, and the other end of the second spring is connected to the jig. One end of the third spring is connected to the reset frame, and the other end of the third spring is connected to the jig. The reset frame and the rocker are detachably connected.

2. The current detection protection device according to claim 1, characterized in that: One end of the connecting rod is also electrically connected to the wire unit; Before the connecting rod rotates, the free end of the connecting rod is electrically connected to the wire unit, and after the connecting rod rotates, the free end of the connecting rod is disconnected from the wire unit.

3. The current detection protection device according to claim 2, characterized in that: An insulating sheet is provided on the connecting rod, and the position of the insulating sheet is configured as the connection point where the first pin guides the connecting rod to rotate.

4. The current detection protection device according to claim 1, characterized in that: The first pin and the second pin are configured as stepped shafts, and the first pin has a smaller diameter than the second pin.

5. The current detection protection device according to claim 1 or 4, characterized in that: The first pin and the second pin are both electrically connected to the electric meter.

6. The current detection protection device according to any one of claims 1 to 4, characterized in that: The reset frame is provided with a first buckle, and the rocker is provided with a second buckle. The first buckle and the second buckle are detachably connected, and the opening directions of the first buckle and the second buckle are opposite.

7. The current detection protection device according to any one of claims 1 to 4, characterized in that: The rocker is magnetic, and an extending direction of the second spring is consistent with an extending direction of the coil center.

8. A current detection protection method, characterized in that: Applying the current detection protection device according to any one of claims 1 to 7, the method comprises: Connecting the conductor unit in series with the device under test; Passing the first pin through the reset frame and electrically connecting it to the conductive sheet; Connecting the electric meter to the plug and electrically connecting it to the first pin; guiding the first pin to compress the first spring and rotate the connecting rod to disconnect the connecting rod from the wire unit; The first pin is guided to compress the third spring, thereby connecting and locking the reset frame and the rocker.

9. The current detection protection method according to claim 8, characterized in that: Connecting the electric meter to the plug and electrically connecting it to the first pin further includes: When the current of the device under test is greater than or equal to a safety threshold, the joystick and the coil are magnetically attracted to each other, and the electric meter is stopped from being connected to the plug.

10. The current detection protection method according to claim 8, characterized in that: guiding the first pin to compress the third spring and connect the reset frame and the rocker, and then further comprising: When the current of the device under test is greater than or equal to the safety threshold, the rocker and the coil are magnetically attracted to each other, the rocker is displaced toward the coil, and the rocker is disengaged from and unlocked from the reset frame. Under the reset force of the third spring, the reset frame pops out the electric meter.

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