CN209979732U

CN209979732U - Test pencil

Info

Publication number: CN209979732U
Application number: CN201920276890.7U
Authority: CN
Inventors: 黄邦宇; 芦望龙
Original assignee: Guilin Huayi Intelligent Measurement Technology Co Ltd
Current assignee: Guilin Huayi Intelligent Measurement Technology Co Ltd
Priority date: 2019-03-05
Filing date: 2019-03-05
Publication date: 2020-01-21
Anticipated expiration: 2029-03-05

Abstract

The utility model relates to a test pencil, which comprises a pencil body, a pencil hanger, a pencil head and a test circuit board; the pen point is positioned at the measuring end of the pen body, and the pen hanger is sleeved at one end, far away from the pen point, of the pen body; the sensing part of the detection circuit board is positioned in the pen head, and the part of the detection circuit board except the sensing part is positioned in the pen body and is used for illuminating when the pen head senses alternating voltage and carrying out acousto-optic prompt after the pen head senses the alternating voltage; the screwdriver is also included; the pen hanger is internally provided with a containing cavity which contains the screwdriver and has an upward opening, and one end of the screwdriver is rotatably arranged in the pen hanger through a rotating shaft so that the screwdriver can move out of the containing cavity and be fixed for corresponding operation. Compared with the traditional test pencil, the test pencil can adopt non-contact detection to detect out a zero line and a live line, can also provide illumination and sound prompt, and has increased the function of a screwdriver compared with the non-contact test pencil.

Description

Test pencil

Technical Field

The utility model relates to an survey electric tool field, concretely relates to test pencil.

Background

The test pencil is a common electrician tool and is widely used. In some places where the light is dim or even dark, however, for safety reasons, the metal tip of the test pencil is not touched during use. Although the contact test pencil can measure the leakage current, the contact test pencil must be contacted with a charged body, which brings great inconvenience to people working in high-voltage occasions and dark occasions, is easy to cause personal electric shock accidents, and the range of measuring the electricity is limited to a certain extent.

For example, the utility model with patent number CN205484525U discloses an induction test pencil with illumination function, which comprises an insulating shell, an induction probe, an induction detection circuit connected with a power supply, an LED induction lamp, a buzzer SP, an LED night-vision lamp and an induction test pencil switch; the induction head is used for detecting an electric field signal of a measured object, and the induction probe is in non-contact with the induction detection circuit; the induction detection circuit is used for receiving the electric field signal detected by the induction probe, and controlling the LED induction lamp and the buzzer SP to work after the electric field signal is amplified and shaped; the induction test pencil also comprises an illuminating lamp, an illuminating lamp switch and an amplifier, wherein the illuminating lamp, the illuminating lamp switch and the amplifier are arranged outside the insulating shell and are connected with a power supply; an inwards concave placing groove is arranged on the outer side surface of the upper end of the insulating shell, and the illuminating lamp is arranged in the placing groove; the amplifier is used for amplifying the current flowing to the illuminating lamp. The test pencil is a relatively common contact test pencil in the current market, and a user can sense a zero line and a live wire while using the test pencil as a screwdriver. However, when the user uses the pen, the user is likely to touch the metal sheet at the pen tip to cause an electric shock accident. In addition, such a conventional test pencil has no lighting function and is difficult to operate normally.

SUMMERY OF THE UTILITY MODEL

To sum up, for overcoming prior art's defect, the utility model aims to solve the technical problem that a test pencil is provided, this test pencil not only can the sensing carry out the reputation suggestion after the approximate scope of alternating current voltage that surveys when, still possesses screwdriver and the function that illuminates.

The utility model provides an above-mentioned technical problem's technical scheme as follows: a test pencil comprises a pencil body, a pencil hanger, a pencil head and a detection circuit board; the pen point is positioned at the measuring end of the pen body, and the pen hanger is sleeved at one end, far away from the pen point, of the pen body; the sensing part of the detection circuit board is positioned in the pen head, and the part of the detection circuit board except the sensing part is positioned in the pen body and is used for illuminating when the pen head senses alternating voltage and carrying out acousto-optic prompt after the pen head senses the alternating voltage; the screwdriver is also included; the pen hanger is internally provided with a containing cavity which contains the screwdriver and has an upward opening, and one end of the screwdriver is rotatably arranged in the pen hanger through a rotating shaft so that the screwdriver can move out of the containing cavity and be fixed for corresponding operation.

The utility model has the advantages that: compared with the traditional test pencil, the test pencil can adopt non-contact detection to detect out a zero line and a live wire, and meanwhile can provide illumination and sound prompt, and the test pencil increases the function of a screwdriver compared with the non-contact test pencil.

On the basis of the technical scheme, the utility model discloses can also do as follows the improvement:

further, the detection circuit board comprises a substrate, a battery, an induction sheet, an operational amplifier, an MCU with AD, a display part and a buzzer; the substrate and the battery are both positioned inside the pen body; the sensing piece is positioned in the pen point and used for sensing a voltage signal of a measured object, the operational amplifier and the MCU with the AD are both positioned on the substrate, the input end of the operational amplifier is connected with the sensing piece, and the input end of the MCU with the AD is connected with the output end of the operational amplifier;

the display part is positioned on the side wall of the pen body, and the buzzer is also positioned inside the pen body; the MCU with the AD is respectively connected with and controls the display part and the buzzer through a control circuit; the battery is connected with the induction sheet, the operational amplifier, the MCU with the AD, the display part and the buzzer through power supply lines respectively so as to provide electric energy for the devices one by one.

The beneficial effect of adopting the further scheme is that: the zero line and the live line can be detected in a non-contact manner.

Further, the induction sheet is a metal sheet.

Further, the display part is an LED indicating lamp or a liquid crystal screen.

Further, the detection circuit board also comprises an LED illuminating lamp; the part of the pen body, which is close to the pen point, is made of a light-transmitting material, and the LED illuminating lamp is positioned in the pen body and corresponds to the position of the light-transmitting material; the battery is connected with the LED illuminating lamp through an illuminating circuit and provides electric energy for the LED illuminating lamp so as to emit light for illumination when the pen point senses alternating voltage.

The beneficial effect of adopting the further scheme is that: the non-contact detection of the zero line and the live line is realized, and meanwhile, illumination and sound prompt can be provided.

Furthermore, the detection circuit board also comprises a key; the plurality of keys are arranged on the side wall of the pen body and used for controlling the on-off of the power supply circuit and the lighting circuit.

Furthermore, a fixing head is arranged at one end of the screwdriver, the fixing head can be installed inside the pen hanger in a rotating mode through the rotating shaft by 180 degrees so that the screwdriver can move out of the accommodating cavity to reach a position parallel to the axial direction of the pen body and then is fixed, and a sliding groove for the rotating shaft to slide horizontally is formed in the position, corresponding to the rotating shaft, of the pen hanger; a notch is formed in one side of the fixing head, and a protrusion is arranged on the fixing head at a position corresponding to the notch; the pen hanger is internally provided with a shoulder structure which is aligned with the notch when the screwdriver reaches the position parallel to the axial direction of the pen body, the shoulder structure is provided with a limiting groove which horizontally pushes the notch to the shoulder structure and then clamps the notch into the limiting groove, and the screwdriver reaches the position parallel to the axial direction of the pen body and is fixed.

The beneficial effect of adopting the further scheme is that: the screwdriver bit can be fixed at a certain position when being used or not used after being rotated by 180 degrees.

Furthermore, a fixing head is arranged at one end of the screwdriver, and the fixing head can be installed in the pen hanger in a rotating mode through the rotating shaft by 90 degrees so that the screwdriver can be moved out of the accommodating cavity to reach a position vertical to the axial direction of the pen body and then fixed; one side of the fixing head is a straight surface, and the pen hanger is provided with a limiting surface which is used for propping against the straight surface when the screwdriver reaches a position which is vertical to the axial direction of the pen body so as to limit the fixing head to continuously rotate forwards; the fixing head is provided with a limiting point, and the part of the pen hanger corresponding to the limiting point is an arc surface so that when the screwdriver reaches the position vertical to the axial direction of the pen body, the limiting point is clamped to limit the fixing head to reversely rotate backwards, and then the screwdriver reaches the position vertical to the axial direction of the pen body and is fixed.

The beneficial effect of adopting the further scheme is that: the screwdriver bit can be fixed at a certain position when being used or not used after being rotated by 90 degrees.

Further, the pen cap is further included; the pen cap is located at one end, far away from the pen point, of the pen body so as to fix the pen hanger at a corresponding position of the pen body.

The beneficial effect of adopting the further scheme is that: the pen hanger is fixed.

Drawings

FIG. 1 is a three-dimensional view of a test pencil when the display is an LED indicator light (the screwdriver is moved out of the storage cavity to a position parallel to the axial direction of the pencil body);

FIG. 2 is a cross-sectional view of FIG. 1 (with a screwdriver received in the receiving cavity);

FIG. 3 is an enlarged view A of FIG. 2;

FIG. 4 is a flow chart of the screwdriver sequentially moving out of the storage cavity to a position parallel to the axial direction of the pen body (the display part is an LED indicator light);

FIG. 5 is an enlarged view B of FIG. 4 c;

FIG. 6 is a three-dimensional view of the test pencil with the screwdriver rotated only 90 degrees to a position axially perpendicular to the body (with the screwdriver moved out of the receiving cavity to a position axially perpendicular to the body);

FIG. 7 is a cross-sectional view of FIG. 6;

FIG. 8 is a cross-sectional view of FIG. 7;

fig. 9 is a three-dimensional view of the test pencil when the display is a liquid crystal display (the screwdriver is moved out of the storage cavity to a position parallel to the axial direction of the pencil body).

In the drawings, the components represented by the respective reference numerals are listed below:

1. the pen body, 2, the pen hanger, 3, the nib, 4, the base plate, 5, the battery, 6, the response piece, 7, bee calling organ, 8, the LED pilot lamp, 9, the LCD screen, 10, the LED light, 11, the button, 12, the screwdriver, 13, accomodate the chamber, 14, the pivot, 15, the fixed head, 16, the spout, 17, the breach, 18, the arch, 19, the circular bead structure, 20, spacing groove, 21, straight face, 22, spacing face, 23, spacing point, 24, the arc surface, 25, the cap for brush.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

Example 1

As shown in fig. 1 and 2, the test pencil comprises a pencil body 1, a pencil hanger 2, a pencil head 3, a pencil cap 25 and a detection circuit board. The nib 3 is in the measuring end of body 1, the suit of hanging 2 is in the body 1 is kept away from the one end of nib 3, specifically as follows: the pen cap 25 is located at one end of the pen body 1 far away from the pen point 3 to fix the pen hanger 2 at a corresponding position of the pen body 1. The sensing part of the detection circuit board is positioned in the pen head 1, and the parts except the sensing part are positioned in the pen body 1, and the detection circuit board is used for illuminating when the pen head 3 senses alternating voltage and performing acousto-optic prompt after the pen head 3 senses the alternating voltage.

The detection circuit board comprises a substrate 4, a battery 5, an induction sheet 6, an operational amplifier, an MCU with AD, a display part and a buzzer 7. The substrate 4 and the battery 5 are both located inside the pen body 1. The sensing piece 6 is arranged inside the pen point 3 and used for sensing a voltage signal of a measured object, preferably: the induction sheet 6 is a metal sheet. The operational amplifier and the MCU with AD are both arranged on the substrate 4, the input end of the operational amplifier is connected with the induction sheet 6 to amplify the detected voltage signal, and the input end of the MCU with AD is connected with the output end of the operational amplifier to convert the amplified voltage signal into a digital signal and analyze and process the digital signal. The display part is an LED indicator light 8 and is arranged on the side wall of the pen body 1, and the buzzer 7 is also arranged inside the pen body 1. The MCU with the AD is respectively connected with and controls the display part and the buzzer 7 through a control circuit, and then controls the display part to emit light to display corresponding voltage grade through the result of analyzing and processing the digital signal, and controls the buzzer 7 to sound to prompt the corresponding voltage grade. The battery 5 is respectively connected with the induction sheet 6, the operational amplifier, the MCU with AD, the display part and the buzzer 7 through power supply circuits so as to provide electric energy for each device one by one. The detection circuit board further comprises an LED illuminating lamp 10 and a key 11: the part of the pen body 1 close to the pen point 3 is made of a light-transmitting material, the LED illuminating lamp 10 is located inside the pen body 1 and corresponds to the position of the light-transmitting material, and the battery 5 is connected with the LED illuminating lamp 10 through an illuminating circuit and provides electric energy for the LED illuminating lamp 10 so as to emit light for illumination when the pen point 3 senses an alternating voltage; the plurality of keys 11 are arranged on the side wall of the pen body 1 and used for controlling the on-off of the power supply circuit and the lighting circuit. The specific technical scheme of the detection circuit board is disclosed in chinese utility model patent No. 201520609476.5, entitled non-contact detection voltmeter, and the specific circuit, control method, etc. are not described herein.

The test pencil also includes a screwdriver 12. A containing cavity 13 which contains the screwdriver 12 and has an upward opening is arranged in the pen hanger 2, one end of the screwdriver 12 is installed in the pen hanger 2 through a rotating shaft 14 which can rotate 180 degrees or 90 degrees, and then the screwdriver 12 moves out of the containing cavity 13 to reach a position which is parallel or vertical to the axial direction of the pen body 1 and is fixed, and then corresponding operations are carried out:

(1) the screwdriver 12 can be rotated 180 degrees

One end of the screwdriver 12 is provided with a fixing head 15, and the fixing head 15 is installed inside the pen hanger 2 through the rotating shaft 14 in a way of rotating 180 degrees, so that the screwdriver 12 moves out of the accommodating cavity 13 to reach a position parallel to the axial direction of the pen body 1. A sliding groove 16 for the rotating shaft 14 to horizontally slide is arranged on the pen hanger 2 corresponding to the rotating shaft 14. A notch 17 is formed in one side of the fixing head 15, and a protrusion 18 is formed in the position, corresponding to the notch 17, of the fixing head 15. A shoulder structure 19 which is aligned with the notch 17 when the screwdriver 12 reaches a position which is parallel to the axial direction of the pen body 1 is arranged in the pen hanger 2, a limiting groove 20 which horizontally pushes the notch 17 to the shoulder structure 19 and then clamps the notch 17 into the protrusion 18 is arranged on the shoulder structure 19, and the screwdriver 12 is fixed at the position which is parallel to the axial direction of the pen body 1.

As shown in fig. 3 and 4, initially the driver 12 is in the receiving cavity 13 and the indentation 17 in the fixation head 15 is offset from the shoulder formation 19. When the screwdriver 12 needs to be rotated 180 degrees, the screwdriver 12 is rotated to move out of the containing cavity 13 until the screwdriver 12 reaches a position axially parallel to the pen body 1. Because the fixing head 15 and the screwdriver 12 rotate synchronously, when the screwdriver 12 reaches a position parallel to the axial direction of the pen body 1, the notch 17 on the fixing head 15 and the shoulder structure 19 are aligned in the axial direction of the pen body 1, at this time, the screwdriver 12 is pushed backwards along the axial direction of the pen body 1 towards the direction of the pen head, the rotating shaft 14 synchronously slides horizontally along the sliding groove 16, the notch 17 is clamped into the shoulder structure 19, the limiting groove 20 clamps the protrusion 18, the fixing head 15 is fixed, the position parallel to the axial direction of the pen body 1 of the screwdriver 12 is also fixed, and then the screwdriver 12 can be used normally. After the screwdriver 12 is used, the screwdriver 12 is pulled forward along the axial direction of the pen body 1 until the protrusion 18 is separated from the limiting groove 20, and finally, the screwdriver 12 is rotated reversely to be accommodated in the accommodating cavity 13 again.

(2) The screwdriver 12 can rotate 90 degrees

As shown in fig. 5-7, one end of the screwdriver 12 is provided with a fixing head 15, and the fixing head 15 is mounted inside the pen hanger 2 by rotating 90 degrees through the rotating shaft 14 so that the screwdriver 12 moves out of the receiving cavity 13 to a position perpendicular to the axial direction of the pen body 1. One side of the fixing head 15 is a straight surface 21, and the pen hanger 2 is provided with a limiting surface 22 which abuts against the straight surface 21 to limit the fixing head 15 to continuously rotate forwards when the screwdriver 12 reaches a position which is vertical to the axial direction of the pen body 1. The fixing head 15 is provided with a limit point 23, and the part of the pen hanger 2 corresponding to the limit point 23 is an arc surface 24 so as to clamp the limit point 23 when the screwdriver 12 reaches the position vertical to the axial direction of the pen body 1 to limit the fixing head 15 to reversely rotate backwards, so that the screwdriver 12 reaches the position vertical to the axial direction of the pen body 1 and is fixed.

Initially, the screwdriver 12 is located in the receiving cavity 13, and the straight surface 21 on the fixing head 15 is staggered from the limiting surface 22. When the screwdriver 12 needs to be rotated by 90 degrees, the screwdriver 12 is rotated to move out of the containing cavity 13 until the screwdriver 12 reaches a position perpendicular to the pen body 1. As the fixing head 15 rotates synchronously with the screwdriver 12, when the screwdriver 12 reaches a position axially perpendicular to the pen body 1: on one hand, the straight surface 21 on the fixing head 15 touches the limiting surface 22, and the fixing head 15 cannot continue to rotate forwards under the blocking limitation of the limiting surface 22; on the other hand, the limiting point 23 rotates along the arc surface 24 of the pen body 1 and is clamped by the arc surface 24, so that the fixing head 15 cannot rotate backwards, the fixing head 15 is fixed, the position of the screwdriver 12, which is perpendicular to the axial direction of the pen body 1, is also fixed, and then the screwdriver 12 can be normally used. After the screwdriver 12 is used, the screwdriver 12 is rotated reversely to enable the limiting point 23 to cross the arc surface 24, so that the effect of the arc surface 24 on the fixing head 15 is released, and finally, the screwdriver 12 is rotated reversely to be accommodated in the accommodating cavity 13 again. The pen hanger 2 is a plastic product capable of generating certain elastic sex, and the arc surface 2 has elastic deformation capacity. The arc surface 24 is a convex surface, and the resistance of the arc surface 24 needs to be overcome (the arc surface 24 is elastically deformed) when the screwdriver 12 is rotated to a position perpendicular to the axial direction of the pen body 1, and also needs to be overcome when the screwdriver is stored in the storage cavity 13.

Example 2

As shown in fig. 8, the display member is a liquid crystal panel 9, and the rest of the structure is the same as that of embodiment 1.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A test pencil comprises a pencil body (1), a pencil hanger (2), a pencil head (3) and a detection circuit board; the pen point (3) is positioned at the measuring end of the pen body (1), and the pen hanger (2) is sleeved at one end, far away from the pen point (3), of the pen body (1); the induction part of the detection circuit board is positioned in the pen head (3), the part of the detection circuit board except the induction part is positioned in the pen body (1), and the detection circuit board is used for illuminating when the pen head (3) senses alternating voltage and performing acousto-optic prompt after the pen head (3) senses the alternating voltage; characterized in that the utility model also comprises a screwdriver (12); the pen hanger (2) is internally provided with a containing cavity (13) which contains the screwdriver (12) and has an upward opening, and one end of the screwdriver (12) is rotatably arranged in the pen hanger (2) through a rotating shaft (14) so that the screwdriver (12) can move out of the containing cavity (13) and be fixed and then be operated correspondingly.

2. Test pencil according to claim 1 characterized in that the detection circuit board comprises a base plate (4), a battery (5), a sensing piece (6), an operational amplifier, a MCU with AD, a display and a buzzer (7); the substrate (4) and the battery (5) are both positioned inside the pen body (1); the sensing piece (6) is arranged in the pen point (3) and used for sensing a voltage signal of a measured object, the operational amplifier and the MCU with the AD are both arranged on the substrate (4), the input end of the operational amplifier is connected with the sensing piece (6), and the input end of the MCU with the AD is connected with the output end of the operational amplifier;

the display part is arranged on the side wall of the pen body (1), and the buzzer (7) is also arranged inside the pen body (1); the MCU with the AD is respectively connected with and controls the display part and the buzzer (7) through a control circuit; the battery (5) is respectively connected with the induction sheet (6), the operational amplifier, the MCU with the AD, the display part and the buzzer (7) through power supply lines so as to provide electric energy for the devices one by one.

3. Test pencil according to claim 2 characterized in that the sensing strip (6) is a metal strip.

4. Test pencil according to claim 2 characterized in that the display is a LED indicator light (8) or a liquid crystal screen (9).

5. Test pencil according to claim 2 characterized in that the detection circuit board further comprises an LED lighting lamp (10); the part, close to the pen point (3), of the pen body (1) is made of a light-transmitting material, and the LED illuminating lamp (10) is located inside the pen body (1) and corresponds to the position of the light-transmitting material; the battery (5) is connected with the LED illuminating lamp (10) through an illuminating circuit and provides electric energy for the LED illuminating lamp (10) to emit light for illumination when the pen head (3) senses alternating voltage.

6. Test pencil according to claim 5 characterized in that the detection circuit board further comprises a key (11); the plurality of keys (11) are arranged on the side wall of the pen body (1) and used for controlling the on-off of the power supply circuit and the lighting circuit.

7. The test pencil according to claim 1, characterized in that a fixing head (15) is provided at one end of the screwdriver (12), the fixing head (15) is mounted inside the pencil hanger (2) through the rotating shaft (14) in a manner of being capable of rotating 180 degrees so that the screwdriver (12) is moved out of the receiving cavity (13) to a position axially parallel to the pencil body (1) and then fixed, and a sliding groove (16) for the rotating shaft (14) to slide horizontally is provided on the pencil hanger (2) at a position corresponding to the rotating shaft (14); a notch (17) is formed in one side of the fixing head (15), and a protrusion (18) is arranged on the fixing head (15) at a position corresponding to the notch (17); be equipped with in the pen hanger (2) work as screwdriver (12) reach with when the position department of being parallel to the axial of body of a pen (1) is the position with shoulder structure (19) that breach (17) align, be equipped with on shoulder structure (19) with breach (17) level is pushed to block into behind shoulder structure (19) spacing groove (20) of arch (18), and then will screwdriver (12) reach with the position of being parallel to the axial of body of a pen (1) is fixed.

8. The test pencil according to claim 1, characterized in that one end of the screwdriver (12) is provided with a fixing head (15), and the fixing head (15) is installed inside the pen hanger (2) in a way of being capable of rotating 90 degrees through the rotating shaft (14) so as to enable the screwdriver (12) to move out of the accommodating cavity (13) to reach a position which is vertical to the axial direction of the pencil body (1) and then be fixed; one side of the fixing head (15) is a straight surface (21), and a limiting surface (22) which is used for propping against the straight surface (21) to limit the fixing head (15) to continuously rotate forwards when the screwdriver (12) reaches a position which is axially vertical to the pen body (1) is arranged on the pen hanger (2); be equipped with limit point (23) on fixed head (15), the portion that corresponds on pen hanger (2) limit point (23) is arc surface (24) with when screwdriver (12) reach with body of a writing brush (1) axial vertically position department blocks limit point (23) with the restriction fixed head (15) reverse backward rotation, and then will screwdriver (12) reach with body of a writing brush (1) axial vertical position is fixed.

9. Test pencil according to any of claims 1 to 8, characterized in that it further comprises a pencil cap (25); the pen cap (25) is located at one end, far away from the pen point (3), of the pen body (1) so as to fix the pen hanger (2) at a corresponding position of the pen body (1).