A new portable power unit tester

Abstract

A novel portable power unit tester, including box and hinge on its upper side cover, box inside is equipped with detection host, cover is equipped with a plurality of switches, switch includes the power switch and adjustment switch arranged outside the cover, so that the test work can be more easily directly after wiring; The cover is provided with a cylindrical groove, the adjustment switch includes a knob switch arranged at the bottom of the cylindrical groove, and an adjustment knob vertically slidingly arranged in the cylindrical groove, the lower side of the middle part of the adjustment knob is connected with the knob switch through the vertically arranged plug shaft; A plurality of clamping teeth are circumferentially arranged on the inner ring of the middle part of the cylindrical groove, a plurality of clamping grooves capable of being clamped with the clamping teeth are arranged on the outer ring of the lower side of the adjustment knob, and a tension spring is connected between the lower side of the adjustment knob and the knob switch. The clamping groove and the clamping tooth can be clamped under the action of the tension spring, prevent the independent rotation of the adjustment knob caused by accidental touch or other reasons, and use more safely.

Description

Technical Field

[0001] This utility model relates to the technical field of frequency converter testing devices, specifically a novel portable power unit tester. Background Technology

[0002] Current power unit testers for frequency converters, especially those for small frequency converters, typically use a carrying case design to ensure portability. When using them, the carrying case needs to be opened before connecting to the test host for testing. This is inconvenient to operate, and when the test space is small, the carrying case cannot be opened properly, affecting the testing process. Utility Model Content

[0003] To address the technical problems existing in the background art, this utility model provides a novel portable power unit tester.

[0004] The technical solution of this utility model is as follows:

[0005] A novel portable power unit tester includes a housing and a top cover hinged to its upper side. The housing contains a testing host, which can perform tests on frequency converters.

[0006] As one of the core technical concepts of this utility model, the upper cover is provided with several switches, including a power switch and an adjustment switch located outside the upper cover. The upper or lower cover is provided with a wiring interface. This method of placing the power switch and adjustment switch outside the upper cover makes it easier to perform testing after wiring.

[0007] As another core technical concept of this utility model, the upper cover is provided with a cylindrical groove. The adjustment switch includes a rotary switch located at the bottom of the cylindrical groove and an adjustment knob that slides vertically within the cylindrical groove. The lower part of the adjustment knob is connected to the rotary switch via a vertically arranged insert shaft. The inner circumference of the cylindrical groove is provided with several teeth, and the lower outer circumference of the adjustment knob is provided with several slots that can engage with the teeth. A tension spring connects the lower side of the adjustment knob to the rotary switch. Based on the above structure, under the action of the tension spring, the slots on the adjustment knob can engage with the teeth. When it is necessary to rotate the adjustment knob, by pinching the adjustment knob and pulling it up, the slots and teeth are disengaged, thus completing the rotation of the adjustment knob and realizing the rotation adjustment of the rotary switch. When the adjustment is completed and the hand is released, the slots and teeth can re-engage under the action of the tension spring, preventing the adjustment knob from rotating on its own due to accidental touch or other reasons, making it safer to use.

[0008] As described above, in a preferred embodiment of the novel portable power unit tester, the insertion shaft is not cylindrical to facilitate the connection between the insertion shaft and the rotary switch, while ensuring that the rotation of the adjustment knob can smoothly drive the rotary switch.

[0009] As described above, in a preferred embodiment of the novel portable power unit tester, to prevent the adjustment knob from deflecting under the tension of the spring and to ensure that the slot can smoothly engage with the teeth when the adjustment knob is under the tension of the spring, the spring is sleeved on the outer ring of the insert shaft.

[0010] As a further preferred embodiment, in order to ensure that the tension spring can generate effective tension on the adjustment knob while preventing interference between the rotation of the adjustment knob and the tension spring, a transition ring is provided on the lower side of the adjustment knob, and the two ends of the tension spring are fixed to the knob switch and the transition ring, respectively.

[0011] As described above, in a preferred embodiment of the novel portable power unit tester, a buckle is provided between the upper and lower covers to prevent the housing and the upper cover from opening on their own.

[0012] As a further preferred option, to ensure the portability of the power unit tester, the housing or top cover is also provided with a handle.

[0013] The beneficial effects of this utility model are as follows: This utility model is a new type of portable power unit tester. By placing the power switch and adjustment switch on the outside of the top cover, the testing work can be carried out more easily and directly after wiring. Under the action of the tension spring, the slot on the adjustment knob can engage with the teeth. When it is necessary to rotate the adjustment knob, by pinching the adjustment knob and pulling it up, the slot and teeth are disengaged, which can complete the rotation of the adjustment knob, thereby realizing the rotation adjustment of the knob switch. When the hand is released after adjustment, the slot and teeth can re-engage under the action of the tension spring, preventing the adjustment knob from rotating on its own due to accidental touch or other reasons, making it safer to use. Attached Figure Description

[0014] The advantages and solutions of this application will become clear to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this invention.

[0015] In the attached diagram:

[0016] Figure 1 This is a schematic diagram of the power unit tester in the embodiment;

[0017] Figure 2 This is a top view of the power unit tester in the embodiment;

[0018] Figure 3 This is a schematic diagram of the connection structure of the first regulating switch in the embodiment;

[0019] Figure 4 This is a schematic diagram of the connection structure of the second regulating switch in the embodiment;

[0020] The components represented by the various reference numerals in the diagram are:

[0021] 1. Box body; 2. Top cover; 21. First cylindrical groove; 211. First locking tooth; 22. Second cylindrical groove; 221. Second locking tooth; 3. Handle; 4. Buckle; 5. First adjustment switch; 51. First rotary switch; 52. First adjustment knob; 53. First insert shaft; 54. First adapter ring; 55. First tension spring; 6. Second adjustment switch; 61. Second rotary switch; 62. Second adjustment knob; 63. Second insert shaft; 64. Second adapter ring; 65. Second tension spring; 7. Power switch. Detailed Implementation

[0022] Exemplary embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings.

[0023] Example

[0024] This embodiment provides a novel portable power unit tester. (See also...) Figure 1 and Figure 2 The device includes a housing 1 and a top cover 2 hinged to its upper side. The housing 1 contains a testing host, which can perform the testing of the frequency converter. As for the specific structure of the testing host, it is based on the existing technology that can achieve the testing of frequency converters. For example, it can be the testing host disclosed in the application document with application number CN202121792806.0. This application does not impose specific limitations on the structure or modules of the testing host. The structure of the power unit tester (the above-mentioned novel portable power unit tester) will be described in detail below with reference to the accompanying drawings.

[0025] In a preferred embodiment, the back of the box 1 and the top cover 2 are hinged together. To prevent the box 1 and the top cover 2 from opening on their own, a buckle 4 is also provided between the front of the top cover 2 and the bottom cover.

[0026] As a further preferred embodiment, to ensure the portability of the power unit tester, a handle 3 is also provided on the front side of the housing 1 or the top cover 2.

[0027] In this embodiment, as one of the core technical concepts of this utility model, the upper cover 2 is provided with a number of switches, including a power switch 7 and an adjustment switch located outside (or on the upper side) of the upper cover 2. The upper cover 2 or the lower cover is provided with a wiring interface. This method of setting the power switch 7 and the adjustment switch outside the upper cover 2 makes it easier to perform the test work directly after wiring.

[0028] As another core technical concept of this utility model, the upper cover 2 is provided with a cylindrical groove. The adjustment switch includes a rotary switch located at the bottom of the cylindrical groove and an adjustment knob that slides vertically within the cylindrical groove. The lower part of the adjustment knob is connected to the rotary switch via a vertically arranged insert shaft. The inner circumference of the cylindrical groove is provided with several teeth, and the lower outer circumference of the adjustment knob is provided with several slots that can engage with the teeth. A tension spring connects the lower side of the adjustment knob to the rotary switch. Based on the above structure, under the action of the tension spring, the adjustment knob... The slot can engage with the teeth. When the adjustment knob needs to be rotated, the slot and teeth disengage by pinching the knob and pulling it upwards, allowing the knob to be rotated. After adjustment, the slot and teeth re-engage under the action of the tension spring, preventing the adjustment knob from rotating on its own due to accidental touch or other reasons, making it safer to use. Moreover, this method of rotating the adjustment knob by pulling it effectively avoids the failure of the engagement between the teeth and slot due to pressure, further ensuring safety.

[0029] Furthermore, to facilitate the installation of the various components of the regulating switch, the bottom of the cylindrical groove is a spiral detachable type or other detachable structure.

[0030] Specifically, the regulating switch includes a first regulating switch 5 and a second regulating switch 6:

[0031] The first adjustment switch 5 has a rotary switch 51, an adjustment knob 52, a plug shaft 53 and a tension spring 55, respectively. The cylindrical groove includes a first cylindrical groove 21 that is vertically arranged on the upper cover 2 and is open at the upper end and closed at the lower end, and the inner ring teeth in the middle are first teeth 211.

[0032] The first rotary switch 51 is fixed to the bottom of the first cylindrical groove 21 and has a rotatable first rotating column. The first adjustment knob 52 includes a cylindrical first body whose outer diameter is adapted to the inner diameter of the first cylindrical groove 21 and is inserted into the first cylindrical groove 21. The first insertion shaft 53 is vertically arranged on the lower side of the first adjustment knob 52 and its lower end is inserted into the first rotating column. The lower outer ring of the first body is provided with a plurality of first slots and the first locking teeth 211 can engage with the first slots.

[0033] To facilitate the rotation of the first adjustment knob 52, the upper end of the first adjustment knob 52 extends out of the first cylindrical groove 21, and the outer ring is provided with several anti-slip grooves.

[0034] The second adjustment switch 6 has a rotary switch 61, an adjustment knob 62, a plug shaft 63, and a tension spring 65, respectively. The cylindrical groove includes a second cylindrical groove 22 that is vertically arranged on the upper cover 2 and is open at the upper end and closed at the lower end, and the inner ring of the groove is a second locking tooth 221.

[0035] The second rotary switch 61 is fixed to the bottom of the second cylindrical groove 22 and has a rotatable second rotating column. The second adjustment knob 62 includes a cylindrical second body whose outer diameter is adapted to the inner diameter of the second cylindrical groove 22 and is inserted into the second cylindrical groove 22. The second insertion shaft 63 is vertically arranged on the lower side of the second adjustment knob 62 and its lower end is inserted into the second rotating column. The lower outer ring of the second body is provided with a plurality of second slots and the second locking teeth 221 can engage with the second slots.

[0036] To facilitate the rotation of the second adjustment knob 62, the upper end of the second adjustment knob 62 extends out of the first cylindrical groove 21, and an adjustment piece is provided vertically.

[0037] In this embodiment, as a preferred implementation, in order to facilitate the plug-in connection between the insert shaft and the rotary switch, and at the same time ensure that the rotation of the adjustment knob can smoothly drive the rotary switch to operate, the insert shaft is not a cylindrical structure. Preferably, both the first insert shaft 53 and the second insert shaft 63 adopt a polygonal prism structure.

[0038] As a further preferred embodiment, in order to prevent the adjustment knob from deflecting under the tension of the spring and to ensure that the slot can smoothly engage with the tooth when the adjustment knob is under the tension of the spring, the first tension spring 55 and the second tension spring 65 are respectively sleeved on the outer ring of the first insert shaft 53 and the second insert shaft 63.

[0039] Preferably, to ensure that the tension spring can generate effective tension on the adjustment knob while preventing interference between the rotation of the adjustment knob and the tension spring, a transition ring is provided on the lower side of the adjustment knob. The transition ring of the first adjustment switch 5 is a first transition ring 54, which is rotatably sleeved on the upper end of the first rotating shaft. The two ends of the first tension spring 55 are respectively fixed to the first knob switch 51 and the first transition ring 54. The transition ring of the second adjustment switch 6 is a second transition ring 64, which is rotatably sleeved on the upper end of the second rotating shaft. The two ends of the second tension spring 65 are respectively fixed to the second knob switch 61 and the second transition ring 64.

Claims

1. A novel portable power unit tester, comprising a housing (1) and a top cover (2) hinged to its upper side, wherein a testing host is disposed inside the housing (1), characterized in that, The upper cover (2) is provided with several switches, including a power switch (7) and an adjustment switch located outside the upper cover (2); The upper cover (2) is provided with a cylindrical groove. The adjustment switch includes a rotary switch located at the bottom of the cylindrical groove and an adjustment knob that slides vertically in the cylindrical groove. The lower side of the middle part of the adjustment knob is connected to the rotary switch by a vertically arranged insert shaft. The inner circumference of the cylindrical groove is provided with several locking teeth, and the outer circumference of the lower side of the adjustment knob is provided with several locking grooves that can engage with the locking teeth. A tension spring is connected between the lower side of the adjustment knob and the knob switch.

2. The novel portable power unit tester according to claim 1, characterized in that, The insert shaft is not a cylindrical structure.

3. The novel portable power unit tester according to claim 1, characterized in that, The tension spring is sleeved on the outer ring of the insert shaft.

4. A novel portable power unit tester according to claim 3, characterized in that, The lower side of the adjustment knob is equipped with an adapter ring, and the two ends of the tension spring are fixed to the knob switch and the adapter ring, respectively.

5. A novel portable power unit tester according to any one of claims 1-4, characterized in that, A buckle (4) is also provided between the upper cover (2) and the lower cover.

6. A novel portable power unit tester according to any one of claims 1-4, characterized in that, The box body (1) or the top cover (2) is also provided with a handle (3).

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