A test pen

Abstract

The utility model discloses a kind of test pens, relate to test pen technical field.The test pen is constituted by pen body, pen holder and luminous inner container.Wherein, pen body includes handle portion and switch cover portion, handle portion is equipped with intercommunicating installation channel and installation cavity;Pen holder is installed in installation channel, one end exposes outside handle portion, the other end extends into installation cavity;Luminous inner container includes LED light emitting portion and limiting resistance, LED light emitting portion and limiting resistance are located in installation cavity or switch cover portion, and the end of pen holder close to installation cavity, LED light emitting portion, limiting resistance, switch cover portion sequentially form electric connection.The test pen uses LED light emitting portion, and light emitting brightness is high, even in strong light environment can also be clearly distinguished, effectively improves the identification when testing electricity.

Description

Technical Field

[0001] This utility model relates to the field of voltage testing pen technology, specifically, to a voltage testing pen. Background Technology

[0002] In electrical testing and daily electrical operations, a test pen is an indispensable tool. Its main function is to detect whether an object is energized, providing operators with an intuitive basis for judging whether it is energized and ensuring the safety of electrical operations.

[0003] Currently, most commercially available test pens use a neon bulb as the light source. When the test pen comes into contact with a charged object, the neon bulb lights up due to the current flowing through it, thus indicating that the object being tested is charged. However, the neon bulb itself has a relatively low brightness. This characteristic may meet basic usage needs in dimly lit environments, but in bright environments, such as outdoor sunlight, or strongly lit workshops or offices, the light emitted by the neon bulb is significantly obscured by ambient light, making the illumination status inconspicuous or even difficult for the operator to clearly observe.

[0004] This lack of brightness directly affects the operator's accurate judgment of the electrical state of the object being tested. It may not only reduce work efficiency, but also pose a potential risk of electric shock and other safety accidents due to misjudgment. It cannot adapt well to diverse usage environments and cannot meet the requirements of modern electrical operation for high reliability and high recognition of electrical testing tools. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a test pen.

[0006] This utility model discloses a test pen, characterized in that it includes: The pen body includes a handle portion and a connecting cover portion. The handle portion has an installation channel and an installation cavity. One end of the installation channel passes through one end of the handle, and the other end of the installation channel communicates with one end of the installation cavity. The other end of the installation cavity passes through the other end of the handle. The connecting cover portion is located on the end of the handle portion near the installation cavity. The pen barrel, located within the mounting channel, has one end protruding beyond the handle portion and the other end extending into the mounting cavity; and The light-emitting inner tube includes an LED light-emitting part and a limiting resistor. The LED light-emitting part and the limiting resistor are respectively located in the mounting cavity or the connecting cover. The end of the pen barrel near the mounting cavity, the LED light-emitting part, the limiting resistor, and the connecting cover are electrically connected in sequence.

[0007] According to one embodiment of the present invention, the LED light-emitting part includes an encapsulation part, a carrier part, and a light-emitting circuit. The carrier part and the light-emitting circuit are disposed inside the encapsulation part, and the light-emitting circuit is disposed on the surface of the carrier part. The contact electrode of the light-emitting circuit and the detector are respectively exposed outside the encapsulation part. The contact electrode of the light-emitting circuit is electrically connected to one end of the pen barrel near the mounting cavity, and the contact electrode of the light-emitting circuit is electrically connected to a limiting resistor.

[0008] According to one embodiment of the present invention, the light-emitting circuit includes a first light-emitting diode, a second light-emitting diode, a third light-emitting diode, a fourth light-emitting diode, and a current-limiting circuit. The negative terminal of the first light-emitting diode and the positive terminal of the fourth light-emitting diode are electrically connected to one end of the pen barrel near the mounting cavity, respectively. The negative terminal of the second light-emitting diode and the positive terminal of the third light-emitting diode are electrically connected to a limiting resistor, respectively. The positive terminals of the first and second light-emitting diodes are electrically connected to two terminals of the current-limiting circuit, respectively. The negative terminals of the third and fourth light-emitting diodes are electrically connected to one terminal of the current-limiting circuit, respectively.

[0009] According to one embodiment of the present invention, the current limiting circuit includes a plurality of current limiting light-emitting diodes, which are connected in series, in parallel or in a mixed manner, and the conduction direction of the current limiting light-emitting diodes is from end 1 to end 2 of the current limiting circuit.

[0010] According to one embodiment of the present invention, a first light-emitting diode, a second light-emitting diode, a third light-emitting diode, a fourth light-emitting diode, and a current-limiting light-emitting diode are respectively arranged on the surface of the support portion.

[0011] According to one embodiment of the present invention, the supporting part adopts a plate-like structure, a column-like structure, or a tubular structure.

[0012] According to one embodiment of the present invention, the first light-emitting diode, the second light-emitting diode, the third light-emitting diode, the fourth light-emitting diode, and the current-limiting light-emitting diode are all passive LED components.

[0013] According to one embodiment of the present invention, the encapsulation part adopts a hollow cylindrical structure and is doped with phosphor.

[0014] According to one embodiment of the present invention, the light-emitting inner tube further includes a light-transmitting tube, a first electrical connection, and a second electrical connection. The first electrical connection is located at one end of the light-transmitting tube, and the second electrical connection is located at the other end of the light-transmitting tube. The LED light-emitting part and the limiting resistor are located inside the light-transmitting tube. The pen barrel near the mounting cavity, the first electrical connection, the LED light-emitting part, the limiting resistor, the second electrical connection, and the connecting cover are electrically connected in sequence.

[0015] According to one embodiment of the present invention, the end of the pen barrel near the mounting cavity is in contact with the first electrical connection part, and the second electrical connection part is electrically connected to the connecting cover part through a spring. One end of the spring is in contact with the second electrical connection part, and the other end of the spring is in contact with the connecting cover part.

[0016] Compared with the prior art, the test pen of this utility model has the following advantages: Firstly, the test pen of this utility model, by setting the pen body to include a handle and a connecting cover, with an installation channel and a mounting cavity formed inside the handle, the pen barrel placed in the installation channel, and the light-emitting inner tube placed in the mounting cavity, and the components electrically connected in sequence, not only realizes the basic electrical testing function of the test pen, but also lays the foundation for improving the brightness of the light by setting the LED light-emitting part in the light-emitting inner tube to replace the traditional neon bulb. At the same time, the orderly assembly of each component ensures the stability of the circuit connection and ensures the smooth progress of the electrical testing process.

[0017] Secondly, the LED light-emitting part adopts a structure including a packaging part, a carrier part, and a light-emitting circuit. The carrier part and the light-emitting circuit are located inside the packaging part, which effectively protects the light-emitting circuit and reduces interference from external factors. The contact electrode and the detection part are exposed outside the packaging part, ensuring good electrical connection with other components, improving the reliability of circuit conduction, and providing structural support for stable light emission. The light-emitting circuit adopts a bridge rectifier circuit containing four light-emitting diodes, combined with a current-limiting circuit composed of several current-limiting light-emitting diodes. When the AC output voltage is in the positive and negative half-wave, different light-emitting diodes conduct separately. The current-limiting circuit can limit the current flow direction, improve the voltage resistance, stabilize the circuit voltage and current, and make the light-emitting diodes light up without flickering, greatly improving the detection accuracy and widening the voltage detection range.

[0018] Furthermore, arranging multiple LEDs on the surface of the carrier, which can employ various structures such as plate, column, or tubular shapes, increases the light-emitting range and uniformity. Combined with structures like the light-transmitting tube, this facilitates omnidirectional light emission, enhancing the viewing experience from different angles. Each LED uses passive LED components, eliminating the need for an external battery, reducing operating costs and maintenance complexity. Its brightness far surpasses that of traditional neon lamps, enhancing the display effect. The encapsulation section employs a hollow cylindrical structure doped with phosphor; the LED's emission excites the phosphor to produce even brighter light, further increasing brightness and ensuring clear visibility even in strong light conditions.

[0019] Furthermore, a spring is used to achieve electrical connection between the second electrical connector and the contact cover. The elasticity of the spring ensures a tight contact between the two, guaranteeing stable circuit conduction and improving the reliability of the test pen. The handle and the light-transmitting tube are made of transparent material for easy observation of the light emission status. The pen barrel, the contact cover, the first electrical connector, and the second electrical connector are made of metal to ensure conductivity. The light-transmitting tube is cylindrical, and the first and second electrical connectors are cylindrical. These designs not only facilitate the assembly of each component but also enable 360° light emission, allowing clear observation from every angle and further improving the identification during electrical testing. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a cross-sectional view of the test pen in the embodiment; Figure 2 This is a circuit diagram of the test pen in the test state in the embodiment.

[0021] Explanation of reference numerals in the attached figures: 100. Pen body; 110. Handle; 111. Mounting channel; 112. Mounting cavity; 120. Connecting cover; 200. Pen barrel; 300. Illuminated inner tube; 310. Light-transmitting tube; 320. First electrical connection; 330. Second electrical connection; 340. LED light-emitting part; 341. Light-emitting circuit; 3411. First light-emitting diode; 3412. Second light-emitting diode; 3413. Third light-emitting diode; 3414. Fourth light-emitting diode; 3415. Current limiting circuit; 350. Limiting resistor; 400. Spring; 500. Human body. Detailed Implementation

[0022] The following illustrations disclose several embodiments of the present invention. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit the present invention. That is, in some embodiments of the present invention, these practical details are not essential. In addition, for the sake of simplicity, some conventional structures and components will be shown in the illustrations in a simple schematic manner.

[0023] Furthermore, in this utility model, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the utility model. They are merely used to distinguish components or operations described with the same technical terms and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0024] See Figure 1 and Figure 2 This embodiment provides a voltage tester, which consists of a pen body 100, a pen barrel 200, and a light-emitting inner tube 300. Each component achieves the function of detecting the charged state of an object through specific structural design and electrical connection, and can effectively solve the problems of insufficient brightness and limited environmental adaptability of existing neon bulb voltage testers.

[0025] The pen body 100, as the main support structure of the test pen, consists of a handle portion 110 and a connecting cover portion 120. The handle portion 110 has an installation channel 111 and an installation cavity 112 inside. One end of the installation channel 111 passes through one end of the handle portion 110, and the other end is connected to one end of the installation cavity 112. The other end of the installation cavity 112 passes through the other end of the handle portion 110. This connection structure provides a spatial basis for the installation of the pen barrel 200 and the light-emitting inner tube 300. The connecting cover portion 120 is located on the end of the handle portion 110 near the installation cavity 112 and serves as a conductive component that comes into contact with the human body.

[0026] The pen barrel 200 is installed in the mounting channel 111, with one end protruding from the handle portion 110 for contacting the object being measured, and the other end extending into the mounting cavity 112 to achieve electrical connection with the internal components. The luminous inner tube 300 is disposed within the mounting cavity 112 and is the core component for realizing luminous indication. It includes a light-transmitting tube 310, a first electrical connection 320, a second electrical connection 330, an LED luminous part 340, and a limiting resistor 350. The first electrical connection 320 is disposed at one end of the light-transmitting tube 310, and the second electrical connection 330 is disposed at the other end of the light-transmitting tube 310. Together with the light-transmitting tube 310, they form the basic framework of the luminous inner tube 300. The LED luminous part 340 and the limiting resistor 350 are disposed within the light-transmitting tube 310. Furthermore, the pen barrel 200, the first electrical connection 320, the LED luminous part 340, the limiting resistor 350, the second electrical connection 330, and the connecting cover 120 are sequentially electrically connected to ensure that the current can be smoothly conducted.

[0027] Furthermore, the LED light-emitting part 340 includes an encapsulation part (not shown), a carrier part (not shown), and a light-emitting circuit 341. The carrier part and the light-emitting circuit 341 are disposed inside the encapsulation part. The light-emitting circuit 341 is arranged on the surface of the carrier part, and its contact electrode and detection part are exposed outside the encapsulation part, respectively. The contact electrode is electrically connected to the second electrical connection terminal, and the contact electrode is also electrically connected to the limiting resistor 350, thereby realizing the current transmission between the LED light-emitting part 340 and other components.

[0028] The light-emitting circuit 341 specifically consists of a first light-emitting diode 3411, a second light-emitting diode 3412, a third light-emitting diode 3413, a fourth light-emitting diode 3414, and a current-limiting circuit 3415. The connection method of each light-emitting diode is as follows: the negative terminal of the first light-emitting diode 3411 and the positive terminal of the fourth light-emitting diode 3414 are electrically connected to the first electrical connection part 320, respectively; the negative terminal of the second light-emitting diode 3412 and the positive terminal of the third light-emitting diode 3413 are electrically connected to the limiting resistor 350, respectively; and the first light-emitting diode 3411... The positive terminals of the first LED and the second LED 3412 are electrically connected to terminals 2 of the current-limiting circuit 3415, respectively. The negative terminals of the third LED 3413 and the fourth LED 3414 are electrically connected to terminal 1 of the current-limiting circuit 3415, respectively. The current-limiting circuit 3415 is composed of several current-limiting LEDs, which can be connected in series, parallel, or mixed configurations. Their conduction direction is from terminal 1 to terminal 2 of the current-limiting circuit 3415. This bridge rectifier circuit design enables stable voltage and current output. The terminals electrically connected to the first electrical connection 320, specifically the negative terminal of the first LED 3411 and the positive terminal of the fourth LED 3414, constitute the contact terminals of the light-emitting circuit.

[0029] Meanwhile, the first light-emitting diode 3411, the second light-emitting diode 3412, the third light-emitting diode 3413, the fourth light-emitting diode 3414, and the current-limiting light-emitting diode all use passive LED components, which can be driven to light up without an additional built-in battery. They are arranged on the surface of the carrier, which can adopt a plate structure, column structure, or tubular structure according to actual needs. The encapsulation part adopts a hollow cylindrical structure with phosphor inside. When the light-emitting diode emits light, it can excite the phosphor to produce bright light, achieving a 360° light-emitting effect.

[0030] Regarding the connection details of each component, the end of the pen barrel 200 near the mounting cavity 112 is connected to the first electrical connection part 320 by contact to conduct current. The second electrical connection part 330 is electrically connected to the switch cover part 120 through a spring 400. One end of the spring 400 is connected to the second electrical connection part 330 in contact, and the other end is connected to the switch cover part 120 in contact. This elastic connection method can ensure the stable conduction of the circuit.

[0031] In terms of material selection, the handle part 110 and the light-transmitting tube part 310 are made of transparent material, which makes it easy for the operator to observe the light-emitting state of the light-emitting inner tube 300. The pen barrel 200, the connecting cover part 120, the first electrical connection part 320 and the second electrical connection part 330 are made of metal material, which ensures good conductivity. In addition, the light-transmitting tube part 310 is in the shape of a round tube, and the first electrical connection part 320 and the second electrical connection part 330 are in the shape of a round cover. These shape designs are conducive to the assembly of various components and the conduction of current.

[0032] The working process of the test pen is as follows: When performing live testing, the operator contacts the object to be tested with the end of the pen barrel 200 protruding from the handle part 110, and at the same time, the human body contacts the connection cover part 120. If the object to be tested is live, the current will pass through the object to be tested, the pen barrel 200, the first electrical connection part 320, the LED light-emitting part 340, the limiting resistor 350, the second electrical connection part 330, the spring 400, the connection cover part 120, and the human body 500 in sequence to form a complete circuit.

[0033] Under the action of alternating current, when the alternating current outputs a positive half-wave voltage, the current will drive the first light-emitting diode 3411 and the third light-emitting diode 3413 to conduct and emit light; when the alternating current outputs a negative half-wave voltage, the current will drive the second light-emitting diode 3412 and the fourth light-emitting diode 3414 to conduct and emit light; due to the presence of the current-limiting light-emitting diode in the current-limiting circuit 3415, the current flow can be effectively limited and the voltage resistance of the test pen can be improved, so that the voltage and current of the entire light-emitting circuit 341 remain stable, thereby ensuring that the light-emitting diodes remain lit and do not flicker.

[0034] During this process, the light emitted by the LED excites the phosphor inside the package, making the light brighter. With the help of the cylindrical structure of the light-transmitting tube 310 and the transparent handle 110, 360° all-round light emission is achieved. The operator can clearly observe the light emission state from all angles and accurately distinguish it even in strong light environment, thereby determining whether the object being tested is charged.

[0035] In summary, the test pen of this embodiment utilizes the coordinated action of components such as the pen body, pen barrel, light-emitting inner tube, and spring. The light-emitting inner tube includes a light-transmitting tube, a first electrical connection, a second electrical connection, an LED light-emitting part, and a limiting resistor. The LED light-emitting part has a carrier part and a light-emitting circuit inside its encapsulation part. The light-emitting circuit includes a first light-emitting diode, a second light-emitting diode, a third light-emitting diode, a fourth light-emitting diode, and a current-limiting circuit composed of several current-limiting light-emitting diodes. Each light-emitting diode is a passive LED component and is arranged on the carrier part. The encapsulation part contains phosphor. During operation, this test pen forms a stable circuit. During the positive half-wave of the AC current, the first and third LEDs conduct and emit light; during the negative half-wave, the second and fourth LEDs conduct and emit light. The current-limiting circuit ensures stable voltage and current, resulting in stable and flicker-free illumination and improved detection accuracy. The LEDs excite phosphors, achieving 360° illumination in conjunction with the light-transmitting tube and transparent handle. Its brightness far exceeds that of traditional neon lamps, allowing for clear visibility even in bright light environments, thus improving identification. Furthermore, the passive LED components require no additional battery for operation, reducing usage and maintenance costs and expanding the voltage detection range, providing a more reliable and convenient tool for electrical operations.

[0036] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A test pen, characterized in that, The utility model relates to a pen body (100), a pen barrel (200) and a light emitting inner container (300), and the pen body (100) comprises a handle part (110) and a switch cover part (120), the handle part (110) has an installation channel (111) and an installation cavity (112), one end of the installation channel (111) penetrates one end of the handle, the other end of the installation channel (111) communicates with one end of the installation cavity (112), the other end of the installation cavity (112) penetrates the other end of the handle, and the switch cover part (120) is arranged on one end of the handle part (110) close to the installation cavity (112). The pen barrel (200) is arranged in the installation channel (111), one end of the pen barrel (200) is exposed outside the handle part (110), and the other end of the pen barrel (200) extends into the installation cavity (112). The light emitting inner container (300) comprises an LED light emitting part (340) and a limiting resistor (350), the LED light emitting part (340) and the limiting resistor (350) are arranged in the installation cavity (112) or the switch cover part (120) respectively, and the one end of the pen barrel (200) close to the installation cavity (112), the LED light emitting part (340), the limiting resistor (350) and the switch cover part (120) are sequentially electrically connected. The LED light emitting part (340) comprises an encapsulation part, a bearing part and a light emitting circuit (341), the bearing part and the light emitting circuit (341) are arranged in the encapsulation part, the light emitting circuit (341) is arranged on the surface of the bearing part, the contact poles of the light emitting circuit (341) are respectively exposed outside the encapsulation part, the contact poles of the light emitting circuit (341) are electrically connected with the one end of the pen barrel (200) close to the installation cavity (112), and the contact poles of the light emitting circuit (341) are electrically connected with the limiting resistor (350). The light emitting circuit (341) comprises a first light emitting diode (3411), a second light emitting diode (3412), a third light emitting diode (3413), a fourth light emitting diode (3414) and a current limiting circuit (3415), the negative pole of the first light emitting diode (3411) and the positive pole of the fourth light emitting diode (3414) are electrically connected with the one end of the pen barrel (200) close to the installation cavity (112) respectively, the negative pole of the second light emitting diode (3412) and the positive pole of the third light emitting diode (3413) are electrically connected with the limiting resistor (350) respectively, the positive pole of the first light emitting diode (3411) and the positive pole of the second light emitting diode (3412) are electrically connected with the two ends of the current limiting circuit (3415) respectively, and the negative pole of the third light emitting diode (3413) and the negative pole of the fourth light emitting diode (3414) are electrically connected with the one ends of the current limiting circuit (3415) respectively.

2. The electrical testing pen according to claim 1, wherein The current limiting circuit (3415) comprises a plurality of current limiting light emitting diodes, the current limiting light emitting diodes are connected in series, parallel or mixed connection among the current limiting light emitting diodes, and the conduction directions of the current limiting light emitting diodes all flow from the one ends to the two ends of the current limiting circuit (3415).

3. The electrical testing pen according to claim 2, wherein, ​ 4. The electrical testing pen according to claim 3, wherein ​ 5. The electrical testing pen according to claim 4, wherein, The first light emitting diode (3411), the second light emitting diode (3412), the third light emitting diode (3413), the fourth light emitting diode (3414) and the current-limiting light emitting diode are arranged on the surface of the bearing part respectively.

6. The electrical testing pen according to claim 5, wherein, The bearing part adopts a plate-shaped structure, a columnar structure or a tubular structure.

7. The electrical testing probe according to claim 4, wherein The first light emitting diode (3411), the second light emitting diode (3412), the third light emitting diode (3413), the fourth light emitting diode (3414) and the current-limiting light emitting diode all adopt passive LED components.

8. The electrical testing pen of claim 2, wherein, The packaging part adopts a hollow cylindrical structure, and the packaging part is doped with fluorescent powder.

9. The electrical test probe according to claim 1, wherein The light emitting inner container (300) further comprises a light-transmitting tube part (310), a first electrical connection part (320) and a second electrical connection part (330), the first electrical connection part (320) is arranged on one end of the light-transmitting tube part (310), the second electrical connection part (330) is arranged on the other end of the light-transmitting tube part (310), the LED light emitting part (340) and the limiting resistor (350) are arranged in the light-transmitting tube part (310), and the pen barrel (200) is sequentially electrically connected to the first electrical connection part (320), the LED light emitting part (340), the limiting resistor (350), the second electrical connection part (330) and the on-off cover part (120) in sequence from the end close to the installation cavity (112).

10. The electrical testing pen of claim 9, wherein, The end of the pen barrel (200) close to the installation cavity (112) is in contact with the first electrical connection part (320), the second electrical connection part (330) is electrically connected to the on-off cover part (120) through a spring (400), one end of the spring (400) is in contact with the second electrical connection part (330), and the other end of the spring (400) is in contact with the on-off cover part (120).

Images