Test pen

Abstract

The utility model discloses a test pen. The test pen comprises a test head; the testing head comprises a metal conductive core; the shell is coaxially arranged outside the metal conductive core in a sleeving manner, one end of the metal conductive core is exposed out of the shell so as to be in electric contact with a circuit to be detected, and the other end of the metal conductive core is used for being electrically connected with a detection instrument; the two grounding pins are arranged on the first end face of the shell in a spaced mode, the two grounding pins are symmetrically arranged on the two sides of the metal guide core respectively, and the first end face is the end, close to the exposed position of the metal guide core, of the shell; according to the test pen, the microwave circuit can be accurately tested only by contacting the top end (namely the exposed end) of the metal guide core with the to-be-tested point (such as a microstrip line) of the circuit and contacting the grounding pin with the ground at the two sides of the to-be-tested point, the electric connection is realized without welding, the operation is simple, the test efficiency is greatly improved, and the test cost is reduced. And the to-be-tested circuit is not damaged or influenced.

Description

TECHNICAL FIELD

[0001] The utility model relates to line test field, in particular to a test pen. BACKGROUND

[0002] When microwave circuit debugging, often need to test the signal in the microwave circuit at a certain point, for judging whether the circuit before this node works normally. The existing test mode is to test with open fork cable, if requiring test result error is small, need to weld cable in microwave line to realize grounding, its operation is troublesome, influences test efficiency and can have damage to the circuit, therefore, urgently need to provide a kind of test pen under the premise of guaranteeing test accuracy, improve test efficiency.

[0003] It should be noted that the information disclosed in the background section of the present application is only intended to deepen the understanding of the general background of the present application, and should not be regarded as acknowledging or implying in any form that the information constitutes prior art known to those skilled in the art. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a kind of test pen, improve test efficiency under the premise of guaranteeing test accuracy.

[0005] In order to achieve the above purpose, the utility model provides the following technical scheme:

[0006] The utility model provides a kind of test pen, including test head;

[0007] The test head includes metal guide core;

[0008] Coaxial shell is arranged outside the metal guide core, one end of the metal guide core is exposed outside the shell for electrical contact with the circuit to be tested, the other end of the metal guide core is used for electrical connection with detection instrument;

[0009] And two interval setting ground pins are arranged on the first end face of the shell, two ground pins are respectively arranged symmetrically on both sides of the metal guide core, wherein the first end face is one end of the shell close to the exposed part of the metal guide core.

[0010] As described above, the test pen further comprises a first cylindrical body for arranging two ground pins and a second cylindrical body for coaxially sleeving outside the metal guide core;

[0011] Wherein, the first cylindrical body and the second cylindrical body are coaxially detachably connected to realize that the two ground pins are respectively arranged symmetrically on both sides of the metal guide core.

[0012] The test pen as described above, further, a first elastic gasket is provided at the connection between the first column and the second column;

[0013] And / or, a second elastic gasket is provided at the contact end between the metal guide core and the second columnar body.

[0014] The test pen as described above, further, the metal guide core is made of beryllium bronze;

[0015] And / or, the grounding pin is made of beryllium copper.

[0016] The test pen as described above, further, the end of the grounding pin away from the housing is arc-shaped.

[0017] The test pen as described above further includes a pen barrel, one end of which is sleeved on a second end face of the shell opposite to the first end face, a first cable electrically connected to the metal conductor is provided in the pen barrel, and the first cable is passed through the other end of the pen barrel for electrical connection to the detection instrument.

[0018] As for the test pen as described above, further, the first cable is electrically connected to the metal conductor through a signal connector, and the shell of the signal connector is detachably connected to the housing.

[0019] As for the test pen as described above, further, the outer wall of the shell is a stepped cylindrical structure, and the outer wall size of the cylindrical section provided with the grounding pin is smaller than the outer wall size of other cylindrical sections.

[0020] As described above, the test pen further comprises a plurality of first cylindrical bodies, the spacing between the two grounding pins provided in each first cylindrical body is different, and any first cylindrical body and the second cylindrical body are coaxially detachably connected to achieve the two grounding pins being symmetrically arranged on both sides of the metal guide core.

[0021] The test pen as described above, further, the first end surface of the shell is provided with a plurality of grooves along its radial direction for mounting a plurality of groups of grounding pins with different spacings, each group including two grounding pins arranged at intervals.

[0022] The beneficial effects of the present invention are:

[0023] When the test pen is used to test the circuit (such as a microwave circuit) in the circuit board, the top end (i.e. the exposed end) of the metal lead in the test head is in contact with the test point (such as a microstrip line) in the circuit, and the other end of the metal lead is electrically connected with the detection instrument; the grounding foot is in contact with the ground on both sides of the test point (the ground can be an absolute ground or a relative ground), so that the microwave circuit can be tested, that is, when the microwave line has a signal flowing through it, the metal lead will sense the signal and transmit it to the detection instrument for analysis and measurement.

[0024] The test pen only needs to contact the top end (i.e. the exposed end) of the metal lead with the test point (such as a microstrip line) in the circuit and the grounding foot with the ground on both sides of the test point to achieve electrical connection, so that the microwave circuit can be accurately tested without the need for welding to achieve electrical connection, which is simple to operate and greatly improves the testing efficiency without damaging or affecting the test circuit. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 Structure diagram of the test pen provided by the embodiment of the utility model Figure 1 ;

[0026] Figure 2 Structure diagram of the test pen provided by the embodiment of the utility model Figure 2 ;

[0027] Figure 3 Structure diagram of the recess arrangement in the first columnar body provided by the embodiment of the utility model

[0028] In the drawing marks: 10, test head; 11, shell; 12, metal lead; 13, grounding foot; 111, first columnar body; 111a, recess; 20, pen barrel; 30, first cable; 40, signal connector. DETAILED DESCRIPTION

[0029] In order to make the person skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the scope of protection of the present application. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be interpreted as a limitation on the present application.

[0030] In the description of the utility model, it is understood that the orientation or position relation indicated by the terms "center", "upper", "lower", "left", "right" and the like is based on the orientation or position relation shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0031] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0032] Figure 1 The structure of the test pen provided by the utility model embodiment Figure 1 ; As Figure 2 shown: the utility model provides a test pen, which comprises a test head 10, the test head 10 comprises a metal lead 12, a shell 11 coaxially sleeved outside the metal lead 12, one end of the metal lead 12 is exposed outside the shell 11 for electrical contact with the circuit to be tested, the other end of the metal lead 12 is used for electrical connection with a detection instrument, and two spaced apart grounding feet 13 are arranged on the first end face of the shell 11, the two grounding feet 13 are respectively arranged symmetrically on both sides of the metal lead 12, wherein the first end face is one end of the shell 11 close to the exposed part of the metal lead 12.

[0033] When the test pen of the utility model is used to test the circuit to be tested (such as a microwave circuit) in the circuit board, the top end (i.e. the exposed end) of the metal lead 12 in the test head 10 is in electrical contact with the test point (such as a microstrip line) in the circuit, the other end of the metal lead 12 is in electrical connection with the detection instrument, and the grounding feet 13 are in electrical contact with the ground (which can be absolute ground or relative ground) on both sides of the test point, so that the detection of the microwave circuit can be realized, that is, when the signal flows through the microwave circuit, the metal lead 12 will sense the signal and transmit it to the detection instrument for analysis and measurement.

[0034] In the utility model, only the top end (i.e. the exposed end) of the metal lead 12 is in contact with the test point (such as a microstrip line) in the circuit and the grounding feet 13 are in contact with the ground on both sides of the test point to realize electrical connection, so that the microwave circuit can be accurately tested without the need for electrical connection through welding, which is simple to operate, greatly improves the test efficiency, and does not damage or affect the circuit to be tested.

[0035] In the embodiment, the shape of the grounding foot 13 is not specifically limited, and can be rectangular, square or other shapes.

[0036] In practical applications, the grounding foot 13 and the metal core 12 need to be respectively abutted with the ground and the microstrip line in the microwave circuit. With the increase of the number of uses, damage is inevitable, which not only affects the service life of the test pen, but also affects the accuracy and reliability of the test.

[0037] In order to improve the accuracy and reliability of the test and the service life of the test pen, in some embodiments of the embodiment, the shell 11 includes a first cylindrical body 111 for arranging two grounding feet 13 and a second cylindrical body for coaxially sleeving outside the metal core 12; wherein the first cylindrical body 111 and the second cylindrical body are coaxially detachably connected to realize that the two grounding feet 13 are respectively arranged symmetrically on both sides of the metal core 12.

[0038] By arranging the metal core 12 and the grounding foot 13 on the first cylindrical body 111 and the second cylindrical body which are detachably connected, when any one of the metal core 12 and the grounding foot 13 is damaged, the damaged one can be replaced, and the other one can continue to be used. This not only reduces the maintenance cost and prolongs the service life of the test pen, but also ensures the accuracy and reliability of the test.

[0039] In order to further improve the accuracy and reliability of the test and the service life of the test pen, in some examples of the embodiment, a first elastic gasket is arranged at the connection between the first cylindrical body 111 and the second cylindrical body; by arranging the first elastic gasket, when the grounding foot 13 on the first cylindrical body 111 is abutted with the ground, the first elastic gasket can provide certain buffering and absorption effect, while maintaining a certain connection pressure, ensuring the reliability and stability of the electrical connection, thereby ensuring the accuracy and reliability of the test. In addition, it can effectively reduce the possibility of damage to the contact foot, improve the service life of the test pen, and also reduce the damage to the microwave circuit.

[0040] In order to further improve the accuracy and reliability of the test and the service life of the test pen, in some examples of the embodiment, a second elastic gasket is arranged at the contact end of the metal core 12 and the second cylindrical body; by arranging the second elastic gasket, when the metal core 12 is abutted with the microstrip line on the circuit board, the second elastic gasket can provide certain buffering and absorption effect, while maintaining a certain connection pressure, ensuring the reliability and stability of the electrical connection, thereby ensuring the accuracy and reliability of the test. In addition, it can effectively reduce the possibility of damage to the metal core 12, improve the service life of the test pen, and also reduce the damage to the microwave circuit.

[0041] To further improve test accuracy and reliability, as well as extend the lifespan of the test pen, in some implementations of this embodiment, the metal conductor 12 is made of beryllium copper, and / or the ground pin 13 is made of beryllium copper. Because beryllium copper has a certain elasticity, it can absorb shock and vibration to a certain extent, ensuring the reliability and stability of the electrical connection, thereby ensuring test accuracy and reliability. Furthermore, it effectively reduces the possibility of damage to the metal conductor 12 and ground pin 13, extending the lifespan of the test pen and reducing damage to the microwave circuit.

[0042] In order to further improve the accuracy and reliability of the test and the service life of the test pen, in some implementations of this embodiment, the end of the grounding pin 13 away from the shell 11 is arc-shaped. By setting one end of the grounding pin 13 to be arc-shaped, sharp edges or corners can be reduced, reducing the risk of damage to the microwave circuit. At the same time, the possibility of damage to the grounding pin 13 is effectively reduced, and the service life of the test pen is increased. In addition, the arc-shaped design can provide a larger contact area, increase the contact stability and reliability with the ground, and improve the accuracy and reliability of the test. Similarly, in order to further improve the accuracy and reliability of the test and the service life of the test pen, the end of the metal guide core 12 away from the shell 11 is arc-shaped.

[0043] The test head 10 in this embodiment is usually small in size and is not easy to hold during use.

[0044] In order to improve the convenience of use and improve the testing efficiency, Figure 2 Schematic diagram of the structure of the test pen provided in the embodiment of the utility model Figure 2 ;like Figure 3 As shown: In some implementations of this embodiment, the test pen further includes a pen holder 20. One end of the pen holder 20 is sleeved on a second end face of the housing 11, opposite the first end face. A first cable 30 electrically connected to the metal conductor 12 is disposed within the pen holder 20. The first cable 30 extends from the other end of the pen holder 20 for electrical connection to the testing instrument. The provision of the pen holder 20 facilitates handling during use, improves convenience during use, and thereby enhances testing efficiency.

[0045] In this embodiment, the electrical connection method between the first cable 30 and the metal core 12 is not specifically limited. To ensure the reliability and convenience of the electrical connection, the first cable 30 is electrically connected to the metal core 12 via a signal connector 40, and the outer shell of the signal connector 40 is detachably connected to the housing 11. The signal connector 40 ensures a reliable electrical connection between the first cable 30 and the metal core 12, thereby ensuring the accuracy of the test.

[0046] In the embodiment, the connection mode of the pen barrel 20 and the shell 11 is not specifically limited, and for example, the outer wall of the second end surface of the shell 11 is provided with external threads, and the inside of the pen barrel 20 is provided with internal threads matched with the external threads to realize detachable connection of the pen barrel 20 and the shell 11. The above arrangement facilitates the installation of the pen barrel 20 and the shell 11.

[0047] In order to further improve the convenience during use to improve the test efficiency, in some embodiments of the embodiment, the outer wall of the shell 11 is a stepped cylindrical structure, and the outer wall size of the cylindrical segment where the grounding foot 13 is arranged is smaller than that of other cylindrical segments. By arranging the outer wall size of the test pen test end to be small, the test pen can avoid other electronic devices in the microwave circuit, improve the convenience of use of the test pen, and thus improve the test efficiency.

[0048] In the embodiment, the spacing between the two grounding feet 13 is related to the width of the microstrip line in the specific microwave circuit, and the spacing between the two grounding feet 13 is greater than the width of the microstrip line to avoid electrical contact between the grounding feet 13 and the microstrip line. Therefore, in order to improve the application range of the test pen, so that it can be used for microstrip lines with different widths, in some embodiments of the embodiment, the first cylindrical body 111 is provided with a plurality of first cylindrical bodies 111, and the spacing between the two grounding feet 13 arranged in each first cylindrical body 111 is different. Any first cylindrical body 111 and the second cylindrical body are coaxially and detachably connected to realize that the two grounding feet 13 are respectively and symmetrically arranged on both sides of the metal core 12. In this way, during actual use, the matching first cylindrical body 111 can be replaced according to the width of the microstrip line to be tested.

[0049] In order to improve the application range of the test pen, so that it can be used for microstrip lines with different widths, in some other embodiments of the embodiment, the first end surface of the shell 11 is provided with a plurality of groups of grooves 111a along the radial direction, for mounting a plurality of groups of grounding feet 13 with different spacings, and each group includes two grounding feet 13 arranged at intervals. In this way, during actual use, a group of grounding feet 13 matched with the width of the microstrip line to be tested can be installed on the first end surface according to the width of the microstrip line to be tested. When the shell 11 is composed of the first cylindrical body 111 and the second cylindrical body, the plurality of groups of grooves 111a are arranged at the end surface of the first cylindrical body 111; for example, Figure 3 The structure schematic view of the grooves 111a arranged in the first cylindrical body 111 provided in the embodiment of the utility model is shown in Figure ​ As shown in Figure, the end surface of the first cylindrical body 111 is provided with 2 groups of grooves 111a along the radial direction, for mounting a plurality of groups of grounding feet 13 with different spacings, and each group includes 2 grounding feet 13 arranged at intervals.

[0050] In the embodiment, the fixing of the grounding foot 13 in the groove 111a is not limited, and for example, a first limiting hole is formed in the side wall of the first columnar body 111 along the axial direction of the grounding foot 13, the outer wall of the grounding foot 13 is provided with a limiting groove, and a fixing member passes through the first limiting hole and the limiting groove to fix the first limiting hole and the grounding foot 13. Further, the limiting groove is a waist-shaped groove, the first limiting hole is a threaded hole, and the fixing member is a screw. By setting the limiting groove as a waist-shaped groove, the axial installation position of the grounding foot 13 can be finely adjusted, so that the grounding foot 13 is facilitated to be in contact with the ground, thereby improving the accuracy and efficiency of the test.

[0051] In the description of the present specification, the description referring to the terms "some embodiments" or "an example" or the like means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments in a suitable manner. In addition, those skilled in the art can combine and integrate different embodiments or examples described in the present specification.

[0052] The above is only the preferred embodiment of the present application, and does not limit the present application in any way. Any person skilled in the art can make any form of equivalent replacement or modification of the technical solutions and technical contents disclosed in the present application without departing from the scope of the technical solutions of the present application, and such changes still belong to the protection scope of the present application.

Claims

1. A test pen characterized in that, The utility model relates to a test head for detecting circuit, comprising a shell coaxially sleeving outside a metal lead core, one end of the metal lead core is exposed outside the shell for electrical contact with a circuit to be detected, the other end of the metal lead core is used for electrical connection with a detection instrument, and two ground pins are arranged on a first end face of the shell, the two ground pins are symmetrically arranged on both sides of the metal lead core, and the first end face is an end of the shell close to the exposed end of the metal lead core. The shell comprises a first columnar body for arranging the two ground pins and a second columnar body for coaxially sleeving outside the metal lead core. The first columnar body and the second columnar body are coaxially detachably connected to achieve the symmetric arrangement of the two ground pins on both sides of the metal lead core. The connecting part of the first columnar body and the second columnar body is provided with a first elastic gasket.

2. The test strip of claim 1, wherein The contact end of the metal lead core and the second columnar body is provided with a second elastic gasket. The metal lead core is made of beryllium bronze.

3. The test strip of claim 2, wherein, The ground pin is made of beryllium bronze. The end of the ground pin away from the shell is arc-shaped.

4. The test strip of claim 1, wherein The utility model further comprises a pen barrel, one end of the pen barrel is sleeved in a second end face of the shell opposite to the first end face, a first cable electrically connected with the metal lead core is arranged in the pen barrel, the first cable is led out from the other end of the pen barrel for electrical connection with the detection instrument. The first cable is electrically connected with the metal lead core through a signal connector, and the shell of the signal connector is detachably connected with the shell.

5. The test strip of claim 1, wherein The outer wall of the shell is a stepped cylindrical structure, the outer wall size of the cylindrical segment where the ground pin is arranged is smaller than that of other cylindrical segments.

6. The test strip of claim 1, wherein The first columnar body is provided with a plurality of first columnar bodies, the distance between the two ground pins arranged in each first columnar body is different, and any first columnar body and the second columnar body are coaxially detachably connected to achieve the symmetric arrangement of the two ground pins on both sides of the metal lead core.

7. The test strip of claim 6, wherein The first end face of the shell is provided with a plurality of groups of grooves along the radial direction thereof, for mounting a plurality of groups of ground pins with different distances, and each group comprises two ground pins arranged at intervals.

8. The test strip of claim 1, wherein The first end face of the shell is provided with a plurality of groups of grooves along the radial direction thereof, for mounting a plurality of groups of ground pins with different distances, and each group comprises two ground pins arranged at intervals.

9. The test strip of claim 2, wherein ​ 10. The test strip of claim 1 or 2, wherein, ​

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