Pressing rivet type spring plunger structure for inverter EMC (Electro Magnetic Compatibility)

Abstract

The utility model discloses a pressure riveting type spring plunger structure used for inverter EMC, comprising a box body and a cabinet upper cover, a plunger connecting structure is arranged between the box body and the cabinet upper cover, the plunger connecting structure comprises a plurality of sleeves, springs arranged in the sleeves, and movable pins moving in the sleeves, one end of each sleeve is provided with a blind hole, and the other end of each sleeve is provided with a through hole. The spring is placed in the blind hole, the movable pin extends out of the blind hole and moves along the blind hole, and when the case upper cover covers the case body, the top of the movable pin makes contact with the case upper cover or the case body and moves downwards under the gravity effect of the case upper cover to extrude the spring. According to the utility model, the case upper cover and the case body are conducted through the movable pins, so that the case upper cover and the case body form a closed path, the effect of multi-point conduction is achieved, a shielding layer is finally formed, the possibility that a radiation source in the case body emits outwards is reduced, interference signals emitted outwards by a product during working are reduced, and the reliability of the product is improved. And the requirement of the product on electromagnetic compatibility (EMC) is met.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic power equipment, in particular to a riveted spring plunger structure for an inverter EMC. Background Art

[0002] Currently, all household energy storage products need to meet a series of corresponding standards, among which EMC testing is particularly important. The most important test contents in EMC testing are conducted emission testing and radiation testing.

[0003] The purpose of the conducted emissions test is to determine whether the interference signals emitted by the device under test (DUT) through power lines, signal lines, and interconnect lines during operation exceed the limits required by the standard, thereby protecting other equipment operating on the public power grid from interference. The test range is 150kHz-30MHz.

[0004] The radiated emission (RE) test mainly tests the interference intensity of electronic and electrical equipment or systems to the outside world during normal operation, including radiated interference from all components such as circuit boards, chassis, cables and connecting wires. The test range is: 30MHz-1GHz.

[0005] If the contact area between the cover and the chassis is small, the radiation generated inside the chassis cannot be effectively shielded, causing the radiation to radiate outward. At the same time, the product itself will emit interference signals when working. In order to improve the effectiveness of the chassis in shielding such radiation and interference signals, the chassis and the cover are generally connected through wires, so that the chassis and the cover form a shielding body to shield the electromagnetic and radiation inside and outside the chassis. However, since multiple sets of conductive positions need to be set between the chassis and the cover, this method requires turning multiple sets of screws connecting and fixing the wires during the assembly and disassembly process, and it is necessary to check the conductivity between the wires and the chassis or cover. The operation is cumbersome and inconvenient, which is not conducive to improving the efficiency of the production, processing, maintenance and repair process.

[0006] Therefore, the existing technology has defects and needs to be improved. Utility Model Content

[0007] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a riveted spring plunger structure for an inverter EMC.

[0008] The technical solution of the utility model is as follows: A riveted spring plunger structure for an inverter EMC is provided, comprising: a box body, and a chassis cover covering the box body, a plunger connection structure is provided between the box body and the chassis cover, the plunger connection structure comprising: a plurality of sleeves provided on the box body or the chassis cover, a spring provided in the sleeve, and a movable pin movable in the sleeve, one end of the sleeve being provided with a blind hole, the spring being placed in the blind hole, the movable pin extending from the blind hole and moving along the blind hole, when the chassis cover is covered on the box body, the top of the movable pin contacts the chassis cover or the box body and moves downward under the action of gravity of the chassis cover to compress the spring.

[0009] Furthermore, a limit block is provided at the end of the movable pin that contacts the spring, and the outer diameter of the limit block is larger than the outer diameter of the movable pin. A step position is provided on the sleeve corresponding to the outer diameter of the limit block and the movable pin, and the step position blocks and limits the limit position of the movement of the limit block.

[0010] Furthermore, the hole-shaft matching relationship between the movable pin and the sleeve adopts a clearance fit.

[0011] Furthermore, the sleeve and the movable pin are made of conductive metal, and the spring is made of spring steel.

[0012] Furthermore, a connecting platform is provided on an end portion of the sleeve away from the blind hole opening, and the connecting platform is embedded in the box body or the upper cover of the chassis.

[0013] Furthermore, the sleeve is arranged on the box body or the upper cover of the chassis, and the movable pin is correspondingly arranged on the upper cover of the chassis or the box body, and the movable pin is movably embedded in the blind hole of the sleeve.

[0014] Furthermore, an inclined surface or an arc surface is provided on one end of the movable pin facing the sleeve.

[0015] Furthermore, the chassis cover and the box body are locked and fixed by a connecting piece, and the connecting piece is arranged around and close to the outer edge of the chassis cover.

[0016] By adopting the above scheme, the utility model connects the upper cover of the chassis and the box body through a movable pin, thereby forming a closed passage between the upper cover of the chassis and the box body, thereby achieving the effect of multi-point conduction, and finally forming a shielding layer, reducing the possibility of the radiation source inside the box to emit outward, reducing the interference signal emitted outward by the product itself during operation, and meeting the product's requirements for electromagnetic compatibility (EMC). BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of the first embodiment of the present utility model.

[0018] Figure 2 It is a structural diagram of the plunger connection structure.

[0019] Figure 3 This is a schematic structural diagram of the second embodiment of the present utility model.

[0020] Figure 4 This is a top view of the chassis cover. DETAILED DESCRIPTION

[0021] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] See also Figures 1 to 3 The utility model provides a riveted spring plunger structure for inverter EMC, comprising: a box body 1, and a chassis cover 2 covering the box body 1, a plunger connection structure 3 is provided between the box body 1 and the chassis cover 2, and the plunger connection structure 3 comprises: a plurality of sleeves 31 provided on the box body 1 or the chassis cover 2, a spring 32 provided in the sleeve 31, and a movable pin 33 movable in the sleeve 31, one end of the sleeve 31 is provided with a blind hole, the spring 32 is placed in the blind hole, the movable pin 33 extends from the blind hole and moves along the blind hole, when the chassis cover 2 is covered on the box body 1, the top of the movable pin 33 contacts the chassis cover 2 or the box body 1 and moves downward under the action of the gravity of the chassis cover 2 to compress the spring 32.

[0023] In some embodiments, see Figure 1 The sleeve 31 is provided on the case 1. When the upper cover 2 is closed on the case 1, the end of the movable pin 33 extending from the sleeve 31 contacts the upper cover 2. When the upper cover 2 is pressed downward by gravity, the movable pin 33 moves downward and compresses the spring 32, thereby playing a buffering role and conducting the upper cover 2 and the case 1. In some embodiments, please refer to Figure 3 The sleeve 31 is arranged at the bottom of the chassis cover 2. When the chassis cover 2 is closed on the box body 1, the end of the movable pin 33 extending from the sleeve 31 contacts the box body 1, and when the chassis cover 2 is pressed down by gravity, the movable pin 33 moves toward the inside of the sleeve 31 and squeezes the spring 32, thereby playing a buffering role and conducting the chassis cover 2 and the box body 1.

[0024] The chassis cover 2 and the box body 1 are connected through the movable pin 33, so that the chassis cover 2 and the box body 1 form a closed path, thereby achieving the effect of multi-point conduction, and finally forming a shielding layer, reducing the possibility of the radiation source inside the box body 1 to emit outward, reducing the interference signal emitted outward by the product itself during operation, and meeting the product's EMC requirements.

[0025] During the manufacturing process, the sleeve 31 is press-riveted onto the box body 1 or the chassis cover 2. Then, before spraying the box body 1 and the chassis cover 2, the contact position corresponding to the movable pin 33 and the spring 32 is sprayed with protective paint to prevent paint from being sprayed on the contact position between the box body 1 or the chassis cover 2 and the movable pin 33 and the spring 32, thereby facilitating the connection between the box body 1 and the chassis cover 2 through the movable pin 33 and the spring 32. In subsequent use, there is no need to repeatedly disassemble and assemble the box body. Simply placing the chassis cover 2 on the box body can push the movable pin 33 and compress the spring 32 to achieve contact-type connection.

[0026] In some embodiments, a limit block 331 is provided at the end of the movable pin 33 that contacts the spring 32. The outer diameter of the limit block 331 is larger than that of the movable pin 33. A step is provided on the sleeve 31 corresponding to the outer diameter of the limit block 331 and the movable pin 33. The step blocks and limits the limit movement of the limit block 331. The blocking and limiting provided between the step and the limit block 331 prevents the movable pin 33 from falling out of the sleeve 31, thereby improving safety and stability.

[0027] In some embodiments, the sleeve 31 is provided on the housing 1, the movable pin 33 is correspondingly provided on the chassis cover 2, and the movable pin 33 is movably embedded in the blind hole of the sleeve 31; or the sleeve 31 is provided on the chassis cover 2, the movable pin 33 is correspondingly provided on the housing 1, and the movable pin 33 is movably embedded in the blind hole of the sleeve 31. In this embodiment, by providing a split movable pin 33, assembly and replacement are facilitated, thereby improving the efficiency of loading and unloading. In this embodiment, the movable pin 33 is provided with an inclined surface or an arc surface at one end facing the sleeve 31, so that when the movable pin 33 is installed, the inclined surface or the arc surface at the front end of the movable pin 33 can provide a guiding effect, thereby quickly installing the movable pin 33 into the sleeve 31. Moreover, the inclined surface or arc surface of the movable pin 33 allows the front end of the movable pin 33 to be inserted into the spring 32, thereby ensuring the stability of the contact between the movable pin 33 and the spring 32, and meeting the requirement of conducting the box body 1 and the chassis cover 2.

[0028] In some embodiments, the hole-axis fitting relationship between the movable pin 33 and the sleeve 31 adopts a clearance fit to facilitate the movable pin 33 to move inside the sleeve 31, thereby contacting and squeezing the spring 32, thereby achieving conduction between the box body 1 and the chassis cover 2.

[0029] In some embodiments, the sleeve 31 and the movable pin 33 are made of conductive metal, and the spring 32 is made of spring steel, so as to form a conductive circuit with the box body 1 and the chassis cover 2, thereby forming a shielding layer to shield and isolate the ionizing radiation and interference signals generated inside the box body 1.

[0030] In some embodiments, a connecting platform 311 is provided on the end of the sleeve 31 away from the blind hole opening, and the connecting platform 311 is embedded in the box body 1 or the chassis cover 2, thereby increasing the contact surface between the sleeve 31 and the box body 1 or the chassis cover 2, and making the connection state more stable and reliable.

[0031] In some embodiments, see Figure 4 The chassis cover 2 and the chassis body 1 are locked and fixed together by connectors 4, which are arranged around the outer edge of the chassis cover 2. In some embodiments, the connectors 4 are screws that pass through the mounting holes in the chassis cover 2 and lock into corresponding threaded holes in the chassis body 1, thereby connecting and fixing the chassis cover 2 and the chassis body 1. Used in conjunction with the plunger connection structure 3, the number of screws used can be reduced, the strength of the overall structure can be ensured, and the time required for assembly and disassembly during production can be indirectly reduced, effectively improving assembly and disassembly efficiency.

[0032] To sum up, the utility model connects the upper cover and the box body through the movable pin, thereby forming a closed passage between the upper cover and the box body, thereby achieving the effect of multi-point conduction, and finally forming a shielding layer, reducing the possibility of the radiation source inside the box to emit outward, reducing the interference signal emitted outward by the product itself during operation, and meeting the product's requirements for electromagnetic compatibility (EMC).

[0033] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A riveted spring plunger structure for inverter EMC, characterized in that: include: A box body, and a chassis cover covering the box body, a plunger connection structure is provided between the box body and the chassis cover, the plunger connection structure includes: a plurality of sleeves provided on the box body or the chassis cover, a spring provided in the sleeve, and a movable pin movable in the sleeve, one end of the sleeve is provided with a blind hole, the spring is placed in the blind hole, the movable pin extends from the blind hole and moves along the blind hole, when the chassis cover is closed on the box body, the top of the movable pin contacts the chassis cover or the box body and moves downward under the action of the gravity of the chassis cover to compress the spring.

2. The riveted spring plunger structure for inverter EMC according to claim 1, characterized in that: A limit block is provided at the end of the movable pin that contacts the spring, and the outer diameter of the limit block is larger than the outer diameter of the movable pin. A step position is provided on the sleeve corresponding to the outer diameter of the limit block and the movable pin, and the step position blocks and limits the limit position of the movement of the limit block.

3. The riveted spring plunger structure for inverter EMC according to claim 1, characterized in that: The movable pin and the sleeve adopt a hole-shaft matching relationship of clearance matching.

4. The riveted spring plunger structure for inverter EMC according to claim 1, characterized in that: The sleeve and the movable pin are made of conductive metal, and the spring is made of spring steel.

5. The riveted spring plunger structure for inverter EMC according to claim 1, characterized in that: A connecting platform is provided on the end portion of the sleeve away from the blind hole opening, and the connecting platform is embedded in the box body or the upper cover of the chassis.

6. The riveted spring plunger structure for inverter EMC according to claim 1, characterized in that: The sleeve is arranged on the box body or the upper cover of the chassis, and the movable pin is correspondingly arranged on the upper cover of the chassis or the box body, and the movable pin is movably embedded in the blind hole of the sleeve.

7. The riveted spring plunger structure for inverter EMC according to claim 6, characterized in that: An inclined surface or an arc surface is provided on one end of the movable pin facing the sleeve.

8. The riveted spring plunger structure for inverter EMC according to claim 1, characterized in that: The upper cover of the chassis is locked and fixed to the chassis body through a connecting piece, and the connecting piece is arranged around and close to the outer edge of the upper cover of the chassis.

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