Multimeter multifunctional detection tool

Abstract

The invention relates to a multimeter multifunctional detection tool, and relates to the field of electrical measurement, the multimeter multifunctional detection tool comprises a regulator body, a contact, a metal needle and a first magnet, the regulator body comprises a fixed part and a rotating part, the fixed part is electrically connected with a multimeter through a cable, the rotating part is connected with a plurality of test pens through cables, the contact is fixedly connected in the fixed part, and the metal needle is connected with the first magnet. The plurality of metal needles are erected in the rotating part at intervals, and the rotating part rotates to enable the single metal needle to be in contact with the single contact and enable the cables on the two sides of the regulator body to be connected; the device has the advantages that different contact devices such as a needle, a hole and an alligator clip can be automatically selected according to the condition of an equipment interface, so that the equipment can be efficiently measured.

Description

Technical Field

[0001] This invention relates to the field of electrical measurement technology, and in particular to a multi-functional testing fixture for a multimeter. Background Technology

[0002] The test heads that come with existing multimeters have a simple structure. When dealing with different interfaces, incompatibility of the test heads can increase the difficulty of testing or make it impossible to measure.

[0003] Therefore, to address the above shortcomings, a multi-functional testing fixture for multimeters is needed. Summary of the Invention

[0004] (a) Technical problems to be solved The technical problem to be solved by this invention is to solve the problem of mismatch between the connector interface on the device and the multimeter test head when using a multimeter to test continuity.

[0005] (II) Technical Solution To solve the above-mentioned technical problems, the present invention provides a multi-functional testing fixture for a multimeter, including an adjuster body, contacts, metal needles, and a first magnet. The adjuster body includes a fixed part and a rotating part. The fixed part is electrically connected to the multimeter via cables. The rotating part is connected to multiple test leads via cables. The contacts are fixedly connected within the fixed part. Several metal needles are spaced apart within the rotating part. The rotating part rotates to make a single metal needle contact a single contact and to connect the cables on both sides of the adjuster body. The first magnet is fixedly connected to the middle of the rotating part to make the rotating part fit against the fixed part.

[0006] As a further explanation of the present invention, preferably, a second magnet with magnetic poles opposite to those of the first magnet is fixedly connected to the middle of the fixing part, and the first magnet and the second magnet attract each other so that the fixing part and the rotating part fit tightly together.

[0007] As a further explanation of the present invention, preferably, both the fixed part and the rotating part are fixedly connected to solder pads, the solder pads are electrically connected to the cable, the contacts are welded to the solder pads in the fixed part, and the metal pins are electrically connected to the solder pads in the rotating part.

[0008] As a further explanation of the present invention, preferably, the end of the metal needle that connects with the contact point has an acute chamfer, and the contact point has a disc-shaped structure.

[0009] As a further explanation of the present invention, preferably, the other end of the metal needle is fixedly connected to the solder pad in the rotating part by a spring, so that the chamfered end of the metal needle contacts or rotates away from the contact.

[0010] As a further explanation of the present invention, preferably, a circular partition is fixedly connected inside the rotating part, and a plurality of holes are provided on the partition. The metal needle passes through the holes on the partition to slide and connect with the rotating part. The outer diameter of the position where the metal needle contacts the spring is larger than the diameter of the hole in the partition.

[0011] As a further explanation of the present invention, preferably, the end of the rotating part is fixedly connected to an annular outer sleeve, and the end of the fixing part is fixedly connected to an annular middle sleeve, the outer diameter of the middle sleeve being equal to the inner diameter of the outer sleeve so that the middle sleeve is embedded in the outer sleeve so that the fixing part is connected to the rotating part.

[0012] As a further explanation of the present invention, preferably, the first magnet is fixed to the partition and protrudes outside the outer sleeve, and an annular inner sleeve is fixed to the middle of the fixing part. The second magnet is located inside the inner sleeve, the inner diameter of the inner sleeve is equal to the outer diameter of the first magnet, and the first magnet extends into the inner sleeve and attracts the second magnet.

[0013] (III) Beneficial Effects The above-described technical solution of the present invention has the following advantages: This invention designs a testing fixture with a built-in rotating device, which can select different contact devices such as needles, holes, and alligator clips according to the equipment interface, so as to efficiently measure the equipment. Attached Figure Description

[0014] Figure 1 This is a diagram illustrating the effect of using the present invention; Figure 2 This is a diagram illustrating the combined effect of the regulator body of the present invention; Figure 3 This is a diagram of the internal structure of the regulator body of the present invention; Figure 4 This is a structural diagram of the fixing part interface of the present invention; Figure 5 This is a structural diagram of the rotating part interface of the present invention.

[0015] In the diagram: 1. Regulator body; 11. Fixing part; 12. Rotating part; 13. Middle sleeve; 14. Inner sleeve; 15. Divider; 16. Outer sleeve; 17. Scale; 18. Pointer; 2. Contact point; 3. Metal needle; 31. Spring; 4. First magnet; 41. Second magnet; 5. Multimeter; 51. Anode wire; 52. Cathode measuring pen; 53. First-position test pen; 54. Second-position test pen; 55. Third-position alligator clip. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] A multi-functional testing fixture for multimeters, combined with Figure 1 , Figure 3 The regulator includes a regulator body 1, contacts 2, a metal needle 3, and a first magnet 4. The regulator body 1 is divided into a non-rotating part and a rotating part. Contacts 2 are located in the non-rotating part, and the metal needle 3 is located in the rotating part. The metal needle 3 contacts the contacts 2 to achieve energization. The first magnet 4 is used to connect to the regulator body 1.

[0018] Combination Figure 1 , Figure 2 The regulator body 1 specifically includes a fixed part 11 and a rotating part 12, both of which are 3D-printed plastic rotating structures. The constricted end of the fixed part 11 is electrically connected to the multimeter 5 via an anode wire 51. The constricted end of the rotating part 12 is connected to multiple test probes, preferably three, via the anode wire 51: a first-range test probe 53, a second-range test probe 54, and a third-range alligator clip 55. A cathode test probe 52 is also connected to the multimeter 5 via a cathode wire. The anode wire 51 and cathode wire are respectively selected from AFR-2500 0.5mm black and red wires, and their connection to the multimeter terminals remains unchanged. Generally, only the anode wire 51 is equipped with a fixture, but when the usage requirements are not met, the same fixture can be added to the negative wire.

[0019] Combination Figure 3 , Figure 4 An annular middle sleeve 13 is fixedly connected to the open end of the fixing part 11, and an annular inner sleeve 14 is fixedly connected to the middle part of the open opening of the fixing part 11. A metal disc-shaped contact 2 is fixedly connected to the open opening of the fixing part 11 between the middle sleeve 13 and the inner sleeve 14. The fixing part 11 is provided with a solder pad, the anode wire 51 is soldered to the solder pad, and the contact 2 is fixedly connected to the solder pad. A second magnet 41 with magnetic poles opposite to those of the first magnet 4 is fixedly connected to the fixing part 11 inside the inner sleeve 14. The first magnet 4 and the second magnet 41 attract each other to make the fixing part 11 and the rotating part 12 fit tightly together.

[0020] Combination Figure 3 , Figure 5An annular outer sleeve 16 is fixedly connected to the open end of the rotating part 12. The inner diameter of the outer sleeve 16 is equal to the outer diameter of the middle sleeve 13, allowing the middle sleeve 13 to be inserted into the outer sleeve 16 so that the fixing part 11 and the rotating part 12 are rotatably connected. The first magnet 4 is a cylinder, and the outer diameter of the first magnet 4 is the same as the inner diameter of the inner sleeve 14. The first magnet 4 extends into the inner sleeve 14 and attracts the second magnet 41. By setting the middle sleeve 13, the inner sleeve 14, and the outer sleeve 16, and combining the attraction of the two magnets, not only can the rotational connection between the fixing part 11 and the rotating part 12 be made stable, but water and dust and other impurities can also be prevented from seeping into the body of the regulator 1.

[0021] Combination Figure 3 , Figure 5 Three metal needles 3 are spaced apart within the rotating part 12. The rotating part 12 also has pads connected to the anode wires 51. Springs 31 are fixed between the metal needles 3 and the pads in the rotating part 12 to allow the metal needles 3 to extend and retract. A circular partition 15 is fixedly connected within the rotating part 12. The partition 15 has three holes spaced apart. The metal needles 3 pass through the holes in the partition 15 to slide and connect with the rotating part 12. The outer diameter of the metal needle 3 at the point of contact with the spring 31 is larger than the diameter of the holes in the partition 15, ensuring the metal needle 3 is stably engaged within the rotating part 12 and preventing it from disengaging from the limiting position of the rotating part 12 during extension and retraction. The end of the metal needle 3 that contacts the contact point 2 has a sharp chamfer. The rotating part 12 rotates to make a single metal needle 3 contact a single contact point 2 and connect the anode wires 51 on both sides of the regulator body 1, enabling the switching of multiple measuring pens. The chamfered end of the metal needle 3 is stably in contact with the contact point 2 by cooperating with the spring 31, or the spring 31 is contracted under the guidance of the chamfer when switching measuring pens so that the metal needle 3 can smoothly turn away from the contact point 2.

[0022] Furthermore, a pointer 18 is provided on the outer end face of the fixing part 11 near the contact point 2, and a scale 17 with three positions is provided on the outer end face of the rotating part 12 at the three metal pins 3. Position 1 corresponds to a first-position test pen 53 for measuring a pin connector on the equipment; position 2 corresponds to a second-position test pen 54 for measuring a socket connector on the equipment; and position 3 corresponds to a third-position alligator clip 55, used to clamp loose wires on the equipment for easy measurement. Operators can use the markings on the scale 17 and pointer 18 to determine which test pen or alligator clip is currently connected to the multimeter, facilitating operation and identification.

[0023] The present invention also provides a method of use, specifically as follows: Figure 1As shown, before use, insert the banana plug into multimeter 5. Red corresponds to the positive terminal and black corresponds to the negative terminal. Observe the specific shape of the connector on the device. Since contact 2 is only 0.5mm deep and has been chamfered, after determining which range from 1 to 3 is suitable for measurement, rotate the rotating part 12 of the regulator body 1 with force. At this time, the metal needle 3 will retract backward. After rotating to the desired range, since there is a spring 31 behind the metal needle 3, the metal needle 3 is pressed into contact 2 to complete the range change. Moreover, since the force of the magnetic attraction between the fixed part 11 and the rotating part 12 is much greater than the elastic force of the spring 31, the fixed part 11 and the rotating part 12 will be tightly connected and will not separate. When one rotating device cannot meet the measurement requirements, two devices with rotating devices can be selected for use together.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-functional testing fixture for a multimeter, characterized in that: The regulator body (1) includes a contact (2), a metal needle (3) and a first magnet (4). The regulator body (1) includes a fixed part (11) and a rotating part (12). The fixed part (11) is electrically connected to a multimeter (5) via a cable. The rotating part (12) is connected to multiple test probes via a cable. The contact (2) is fixed inside the fixed part (11). Several metal needles (3) are spaced apart inside the rotating part (12). The rotating part (12) rotates so that a single metal needle (3) contacts a single contact (2) and connects the cables on both sides of the regulator body (1). The first magnet (4) is fixed in the middle of the rotating part (12) so that the rotating part (12) fits against the fixed part (11).

2. The multi-functional testing fixture for a multimeter according to claim 1, characterized in that: A second magnet (41) with magnetic poles opposite to those of the first magnet (4) is fixedly connected to the middle of the fixing part (11). The first magnet (4) and the second magnet (41) attract each other so that the fixing part (11) and the rotating part (12) fit tightly together.

3. The multi-functional testing fixture for a multimeter according to claim 2, characterized in that: Both the fixed part (11) and the rotating part (12) are fixedly connected to the solder pads, which are electrically connected to the cable. The contact (2) is welded to the solder pad in the fixed part (11), and the metal needle (3) is electrically connected to the solder pad in the rotating part (12).

4. The multi-functional testing fixture for a multimeter according to claim 3, characterized in that: The end of the metal needle (3) that connects to the contact point (2) has an acute chamfer, and the contact point (2) has a disc-shaped structure.

5. A multi-functional testing fixture for a multimeter according to claim 4, characterized in that: The other end of the metal needle (3) is fixed to the solder pad inside the rotating part (12) by a spring (31) so that the chamfered end of the metal needle (3) contacts or rotates away from the contact (2).

6. The multi-functional testing fixture for a multimeter according to claim 5, characterized in that: A circular partition (15) is fixed inside the rotating part (12). Several holes are opened on the partition (15). The metal needle (3) passes through the holes on the partition (15) to slide and connect with the rotating part (12). The outer diameter of the metal needle (3) at the point where it connects with the spring (31) is larger than the diameter of the hole in the partition (15).

7. A multi-functional testing fixture for a multimeter according to claim 6, characterized in that: The rotating part (12) is fixedly connected to an annular outer sleeve (16), and the fixed part (11) is fixedly connected to an annular middle sleeve (13). The outer diameter of the middle sleeve (13) is equal to the inner diameter of the outer sleeve (16) so that the middle sleeve (13) is embedded in the outer sleeve (16) so that the fixed part (11) is connected to the rotating part (12).

8. A multi-functional testing fixture for a multimeter according to claim 7, characterized in that: The first magnet (4) is fixed to the partition (15) and protrudes out of the outer sleeve (16). The middle part of the fixing part (11) is fixed to the annular inner sleeve (14). The second magnet (41) is located inside the inner sleeve (14). The inner diameter of the inner sleeve (14) is equal to the outer diameter of the first magnet (4). The first magnet (4) extends into the inner sleeve (14) and attracts the second magnet (41).

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