CN210199192U - Test pencil - Google Patents

Abstract

The utility model relates to the technical field of electrician tools, in particular to a test pencil, which comprises a cutter bar, a lead wire; the insulating light guide sleeve is used for insulating the cutter bar from the outside and guiding light; the shell is of a handle-shaped hollow structure; the electric plate is fixed in the shell and is also provided with an illuminating lamp and an indicating lamp; the power supply is fixed in the shell and used for supplying power to the indicator light; the cap is arranged at the tail end of the shell and comprises an aperture, a metal conductive block and an indicator light button, and the aperture is of a transparent tubular structure. The utility model discloses in, through the light guide ring of insulating leaded light cover and test pencil tail end on setting up light and test pencil front end cutter arbor in the test pencil shell, make the front end and the rear end of test pencil have the light source to shine simultaneously, improved illumination greatly, pilot lamp button and wiring plug connection in addition, through the intercommunication of pilot lamp button simultaneous control illumination and circuit, electrician does not need contact circuit, has avoided the possibility of electrician's electric shock.

Description

Test pencil

Technical Field

The utility model relates to an electrician's instrument technical field especially relates to a test pencil.

Background

The test pencil is also called test pencil, which is called test pencil for short. The testing tool is an electrician tool and is used for testing whether the electric wire is electrified or not. The pen body is provided with a neon bulb, and if the neon bulb shines during testing, the neon bulb indicates that the lead is electrified or is a fire wire of a passage. The pen point and the pen tail of the test pencil are made of metal materials, and the pen holder is made of insulating materials. When the test pencil is used, a user must touch a metal part at the tail end of the test pencil by hand to enable a charged body, the test pencil, a human body and the ground to form a loop, so that a neon bulb emits light, the current required by the neon bulb emitting light is very small and less than 1mA, a resistor larger than 1M is connected in series in the test pencil, and in a 220V circuit, the current does not exceed 0.22mA, so that the human body does not feel. During testing, if a human body does not touch the metal part at the tail end of the test pencil, the neon bulb does not emit light, and the charged body is easy to be judged to be dead by mistake.

In practical work, the inventor finds that when the test pencil works in a place with insufficient light, the pen point at the front end on one hand carries high-voltage electricity during testing, and is more dangerous for touch by mistake, and on the other hand, due to insufficient light, the pen point at the front end is possibly not touched by a metal material at the tail of the pen to cause misjudgment, a worker needs to hold the test pencil by one hand, and can work only by holding the flashlight by one hand for illumination, so that the work efficiency is low and the use is inconvenient.

In view of the above problems, the designer is based on the practical experience and professional knowledge that are abundant for many years in engineering application of such products, and is actively researched and innovated in cooperation with the application of theory, so as to create a test pencil, which is more practical.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing a test pencil, which improves the safety and the illumination.

In order to achieve the above purpose, the utility model adopts the technical scheme that: a test pencil, comprising:

the cutter bar is made of a metal conductor, and the front end of the cutter bar is contacted with the charged body when electricity is tested;

the insulating light guide sleeve is shorter than the cutter bar, covers the middle part of the cutter bar and is used for insulating the cutter bar from the outside and guiding light;

the cutter bar penetrates through the front end of the shell, and the middle part of the cutter bar is fixed on the shell;

the electric plate is fixed in the shell, and is provided with a cutter bar connecting piece which is connected with one end of the cutter bar extending into the shell and conducts electricity on the cutter bar to the electric plate; the electric plate is also provided with an illuminating lamp and an indicating lamp, and the indicating lamp is electrically connected with the cutter bar connecting piece through a resistor arranged on the electric plate;

the power supply is fixed in the shell and connected with the indicator light and used for supplying electric energy to the indicator light;

the cap is arranged at the tail end of the shell and comprises a light guide ring, a metal conductive block and an indicator light button, wherein the light guide ring is of a transparent tubular structure, threads matched with the inner wall of the tail end of the shell are arranged on the outer wall of the light guide ring, the metal conductive block is fixed inside the light guide ring and is electrically connected with an indicator light, and the indicator light button is fixed on the light guide ring and is respectively connected with a power supply and an illuminating lamp to form a power-on loop; the utility model discloses a wiring lamp, including pilot lamp button, wiring jack, wiring plug and wire, be fixed with on the lateral wall of pilot lamp button with the wiring plug that the wiring jack corresponds, after pressing the pilot lamp button, the wiring plug inserts in the wiring jack, the wiring plug is connected with the wire, wire end connection has the inside metal conductive ball that is equipped with magnet, the metal conductive ball is used for ground connection.

Preferably, the knife bar is detachably mounted on the housing.

Preferably, the middle part of cutter arbor still is provided with the installation department, the installation department is greater than for the diameter the cylinder of insulating leaded light cover is provided with the screw thread on it, fixes through the screw thread on the installation department the front end of shell.

Preferably, the cutter arbor connecting piece is the electrically conductive pipe fitting of metal that the internal diameter is greater than the cutter arbor, and its inside is provided with toward radially extending's metal elastic sheet, and when the cutter arbor penetrated in the cutter arbor connecting piece, metal elastic sheet and cutter arbor compress tightly the contact.

Preferably, the light includes leading light and rearmounted light, leading light sets up in the cutter arbor connecting piece to make light directly shine on the insulating leaded light cover on the cutter arbor, rearmounted light sets up in being close to the light guide ring side makes light see through the light guide ring.

Preferably, the inside guide way that is provided with of shell, the relative at least two that is provided with of guide way, its width size satisfies the required precision that the electroplax penetrated.

Preferably, still include the power mounting, be provided with the guide post along the axial on the outer wall of power mounting, the guide post set up relatively in the both sides of power mounting outer wall, the guide post with the guide way suits to fix in the shell.

Preferably, the power fixing part comprises a fixing cavity and a rear light channel, the fixing cavity is used for fixing the power, and the rear light channel is close to the rear illuminating lamp.

Preferably, the outer diameter of the light guide ring in the housing is larger than that of the power supply fixing member, so as to press the power supply fixing member in the axial direction of the housing.

Preferably, the metal conductive block is provided with a wiring jack for assisting in grounding.

The utility model has the advantages that: the utility model discloses in, through the light that leads of the insulating leaded light cover on the light that sets up in the test pencil shell and the test pencil front end cutter arbor and the light guide ring of test pencil tail end, there is the light source to shine simultaneously at the front end and the rear end that make the test pencil, the illumination nature in the not enough environment of light has been improved greatly, be connected with the wire plug on the pilot lamp button moreover, with the metal conducting block cooperation of test pencil tail end, press button light and open the wire and the ground contact that link to each other with the wiring plug simultaneously, artifical and metal conducting block direct contact have been avoided. Compared with the prior art, electrician need not hold a flashlight alone again and can accomplish the survey electric work, the use of insulating leaded light cover moreover to and the human body is direct not contact with the metal conducting block, greatly reduced electrician's electric shock's possibility, compare with prior art, test pencil's security performance further improves.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a cross-sectional view of a test pencil according to an embodiment of the present invention;

FIG. 2 is a front view of the pen tail of the test pencil in the embodiment of the present invention

FIG. 3 is a schematic structural view of a cutter bar in an embodiment of the present invention;

fig. 4 is a schematic structural diagram of an electric board in an embodiment of the present invention;

fig. 5 is a side sectional view of an outer shell in an embodiment of the invention;

fig. 6 is a schematic back side view of the power fixing member according to an embodiment of the present invention;

fig. 7 is a schematic front view of a power fixing member according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a cap according to an embodiment of the present invention.

Reference numerals: 1-cutter bar, 2-shell, 3-electric plate, 4-power supply, 5-cap, 6-wiring plug, 11-insulating light guide sleeve, 12-installation part, 21-guide groove, 31-cutter bar connecting piece, 32-illuminating lamp, 33-indicator lamp, 41-power supply fixing piece, 42-guide post, 43-fixing cavity, 44-rear light channel, 51-light guide ring, 52-metal conductive block, 53-indicator lamp button, 311-metal elastic sheet, 321-front illuminating lamp, 322-rear illuminating lamp and 521-wiring jack.

Detailed Description

Because the nib security performance of test pencil among the prior art is relatively poor, when electrician's operation in dark surrounds, it is unclear probably to lead to the electric shock accident to observe, for this application improved on prior art's basis, at the inside light that has increased leading and rearmounted of test pencil, and nib and a tail all make with leaded light material, still use insulating material cladding at the nib, make electrician's not only can be very clear see the electrified body that waits to detect in dark surrounds, the metal conductor of the tail of discernment pen that can also be clear, under the condition of having ensured the illumination performance, the security performance has been guaranteed again, the rate of accuracy of test has also been improved simultaneously.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are the directions or positional relationships indicated on the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element indicated must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may include, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. This embodiment is written in a progressive manner.

A test pencil as shown in fig. 1, the test pencil comprising:

the cutter bar 1 is made of a metal conductor, and the front end of the cutter bar is contacted with a charged body when electricity is tested;

the insulating light guide sleeve 11 is shorter than the cutter bar 1, covers the middle part of the cutter bar 1, and is used for insulating the cutter bar 1 from the outside and guiding light; here, the covering of the middle portion of the blade bar 1 means that a portion of the blade bar 1 contacting the charged body at the head end and a portion of the blade bar 1 connected to other elements are exposed, and the other portions are covered, and the insulating light guide sleeve 11 is made of an insulating light guide material, such as an acrylic material, polycarbonate, polystyrene, or the like.

The shell 2 is of a handle-shaped hollow structure, the cutter bar 1 penetrates through the front end of the shell 2, and the middle part of the cutter bar 1 is fixed on the shell 2;

the electric plate 3 is fixed inside the shell 2, the knife bar connecting piece 31 is arranged on the electric plate 3, the knife bar connecting piece 31 is connected with one end of the knife bar 1 extending into the shell 2, and the electricity on the knife bar 1 is conducted to the electric plate 3; the electric plate 3 is also provided with an illuminating lamp 32 and an indicating lamp 33, and the indicating lamp 33 is electrically connected with the cutter bar connecting piece 31 through a resistor arranged on the electric plate;

a power source 4 fixed in the housing 2 and connected to the indicator lamp 33 for supplying power to the indicator lamp 33;

referring to fig. 2 and 8, the cap 5 is disposed at the tail end of the housing 2, the cap 5 includes a light guiding ring 51, a metal conductive block 52 and an indicator button 53, the light guiding ring 51 is a transparent tubular structure, a thread matched with the inner wall of the tail end of the housing 2 is disposed on the outer wall of the light guiding ring 51, the metal conductive block 52 is fixed inside the light guiding ring 51 and electrically connected to the indicator 33, and the indicator button 53 is fixed on the light guiding ring 51 and respectively connected to the power source 4 and the illumination lamp 32 to form a power-on loop. The metal conductive block 52 is provided with a wiring jack 521 for auxiliary grounding; the side wall of the indicator light button 53 is fixedly provided with a wiring plug 6 corresponding to the wiring jack 521, after the indicator light button 53 is pressed, the wiring plug 6 is inserted into the wiring jack, the wiring plug 6 is connected with the lead 61, the tail end of the lead 61 is connected with a metal conductive ball 62 with a magnet inside, and the metal conductive ball 62 is used for grounding. Here, pilot lamp button 53 is the pilot lamp switch, wiring plug 6 fixed in pilot lamp button 53 department is put through with metal conducting block 52 after the button is pressed, pilot lamp 33 is bright simultaneously, the button is pressed once more and is popped up wiring plug 6 and the disconnection of metal conducting block 52, pilot lamp 33 goes out, the button is prior art, all can buy on the market, as long as guarantee that its two connector one end links to each other with power 4, the other end is connected with the wire behind the pilot lamp 33 and is formed a route, it is no longer repeated here. And the inside magnet that is provided with of metal conductive ball 62 to the electrician is linked together wire 61 through metal conductive ball 62 and other electric conductors when ascending a height the operation, is provided with magnet in the metal conductive ball 62, is convenient for with the conductor connection, and the electric conductor refers to the electric conductor that has the magnetic conductivity here, and electrician no longer contacts metal conducting block 52, even intake in the test pencil, when making the voltage of test pencil conduction too big, also can communicate with earth through wire 61, thereby has avoided the injured possibility of electrician.

When using the test pencil to detect, because the electrified body's of difference detection condition differs, the shape of the contact jaw of the cutter arbor 1 that needs also is different, consequently, in this application, cutter arbor 1 detachably installs on shell 2.

Specifically, as shown in fig. 3, the middle of the tool bar 1 is further provided with a mounting portion 12, the mounting portion 12 is a cylinder with a diameter larger than that of the insulating light guide sleeve 11, and is provided with a thread, and the mounting portion 12 is fixed at the front end of the housing 2 through the thread on the mounting portion 12. The front end of the housing 2 is provided with a mounting hole to make the rear end of the cutter bar 1 extend into the housing 2, and the mounting hole of the housing 2 is stepped to ensure the tightening of the mounting part 12 and prevent water from entering after the tightening. In this arrangement, the tool bar 1 can be replaced by simply screwing the mounting portion 12, and preferably, the mounting portion 12 is provided with a screwing portion (not shown) for clamping a wrench, so as to facilitate replacement and installation of the tool bar 1.

Because cutter arbor 1 demountable installation, need to obtain the guarantee to the reliability of the electricity connection of cutter arbor 1 and inside electroplax 3, as shown in fig. 4, cutter arbor connecting piece 31 is the electrically conductive pipe fitting of metal that the internal diameter is greater than cutter arbor 1, and its inside is provided with toward the metal elastic sheet 311 of radial extension, and when cutter arbor 1 penetrated in the cutter arbor connecting piece 31, metal elastic sheet 311 compressed tightly the contact with cutter arbor 1. Cutter arbor connecting piece 31 is the tubulose, and the position setting is in 3 front end intermediate positions of electroplax, with penetrating 1 alignment of cutter arbor in the shell 2, so that cutter arbor 1 inserts the back, can directly stretch into to the cutter arbor connecting piece 31 in, metal flexure strip 311 sets up intraductally, when cutter arbor 1 stretches into cutter arbor connecting piece 31 inside, the lateral wall and the metal flexure strip 311 contact of cutter arbor 1 are electrically conductive, thereby has guaranteed the reliability of being connected of cutter arbor 1 with inside electroplax 3.

With continued reference to fig. 4, further, the illuminating lamp 32 includes a front illuminating lamp 321 and a rear illuminating lamp 322, the front illuminating lamp 321 is disposed in the tool bar connector 31 to directly irradiate light onto the insulating light guide sleeve 11 on the tool bar 1, and the rear illuminating lamp 322 is disposed near the light guide ring 51 to allow light to penetrate through the light guide ring 51. In order to make the connection more reliable, the utility model discloses a structural connection each component of electroplax, electroplax 3 are the PCB board, and the price economy, the lower and installation of being convenient for of cost is fixed.

Referring to fig. 5, when the electric board 3 is mounted, at least two guide grooves 21 are disposed in the housing 2, and the width dimension of the two guide grooves 21 meets the requirement of the accuracy of penetration of the electric board 3. The electroplax 3 is clamped in the guide groove 21, so that the electroplax can be fixed, and the installation and the disassembly are convenient.

Referring to fig. 6 and 7, the power supply 4 is further provided with a power supply fixing member 41, the outer wall of the power supply fixing member 41 is provided with guide posts 42 along the axial direction, the guide posts 42 are oppositely arranged on two sides of the outer wall of the power supply fixing member 41, and the guide posts 42 are adapted to the guide grooves 21 to be fixed in the housing 2. The power fixing member 41 includes a fixing cavity 43 and a rear light channel 44, the fixing cavity 43 is used for fixing a power, and the rear light channel 44 is adjacent to the rear illumination lamp 322.

In the above embodiment, the power fixing member 41 is fixed in the same manner as the electric board 3, and two guide posts 42 are disposed on the side wall of the power fixing member 41, so that the power fixing member 41 can be installed, and two cavities are disposed in the power fixing member 41, one fixing cavity 43 with one end closed is used for fixing the power source 4 in the fixing cavity 43 by adhesion, of course, the bottom of the power source 4 is provided with a conductive member which forms a power-on loop (not shown) with the indicator light 33, the other cavity is a rear light channel 44, as shown in fig. 1, the rear illumination lamp 322 extends into the rear light channel 44, and two ends of the rear light channel 44 are opened, so as to irradiate the light source onto the light guide ring 51.

As shown in fig. 8, the outer diameter of the diaphragm 51 in the housing 2 is larger than the outer diameter of the power supply holder 41 to press the power supply holder 41 in the axial direction of the housing 2. Here, since the electric board 3 and the power supply holder 41 are both fixed in the guide groove 21, but need to be fixed in the axial direction of the housing 2, the pipe wall at the lower part of the diaphragm 51 is used for fixing the power supply holder 41, and the power supply holder 41 is in contact with the electric board 3 to press and fix the power supply holder 41 and the electric board 3 by the rotation and pressing of the diaphragm 51. Here, as shown in fig. 1, the connection lines of the indicator lamp 33 and the illumination lamp 32 are provided with a margin so as not to damage the wire when the light guide ring 51 rotates.

The utility model discloses in, each part all adopts the detachable mode, is convenient for maintain and change the annex, and life is more permanent, and when pilot lamp simultaneous operation, insulating leaded light cover is cylindric luminous body, and the light guiding ring is cyclic annular luminous body, and two kinds of lighting modes can satisfy multiple demand, and the setting of pilot lamp button moreover, the button is pressed, and wire and metal block put through need not the switch-on of human participation return circuit, and the security performance improves greatly.

It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (9)

1. A test pencil, comprising:

the cutter bar (1) is made of a metal conductor, and the front end of the cutter bar is contacted with a charged body when electricity is tested;

the insulating light guide sleeve (11) is shorter than the cutter bar (1), covers the middle of the cutter bar (1), and is used for insulating the cutter bar (1) from the outside and guiding light;

the cutter bar (1) penetrates through the front end of the shell (2), and the middle part of the cutter bar (1) is fixed on the shell (2);

the electric plate (3) is fixed inside the shell (2), a cutter bar connecting piece (31) is arranged on the electric plate (3), the cutter bar connecting piece (31) is connected with one end, extending into the shell (2), of the cutter bar (1), and the electricity on the cutter bar (1) is conducted to the electric plate (3); the electric plate (3) is also provided with an illuminating lamp (32) and an indicating lamp (33), and the indicating lamp (33) is electrically connected with the cutter bar connecting piece (31) through a resistor arranged on the electric plate;

a power supply (4) fixed in the housing (2) and connected with the indicator light (33) for supplying electric energy to the indicator light (33);

the cap (5) is arranged at the tail end of the shell (2), the cap (5) comprises an aperture guide ring (51), a metal conductive block (52) and an indicator light button (53), the aperture guide ring (51) is of a transparent tubular structure, threads matched with the inner wall of the tail end of the shell (2) are arranged on the outer wall of the aperture guide ring, the metal conductive block (52) is fixed inside the aperture guide ring (51) and is electrically connected with the indicator light (33), and the indicator light button (53) is fixed on the aperture guide ring (51) and is respectively connected with the power supply (4) and the illuminating lamp (32) to form an electrifying loop;

the metal conductive block (52) is provided with a wiring jack (521) for auxiliary grounding; be fixed with on the lateral wall of pilot lamp button (53) with wiring plug (6) that wiring jack (521) correspond, after pressing pilot lamp button (53), wiring plug (6) insert in the wiring jack, wiring plug (6) are connected with wire (61), the trailing end connection of wire (61) has inside metal conductive ball (62) that is equipped with magnet, metal conductive ball (62) are used for ground connection.

2. Test pencil according to claim 1, characterized in that the knife bar (1) is detachably mounted on the housing (2).

3. The test pencil according to claim 2, characterized in that the middle of the cutter bar (1) is provided with a mounting part (12), the mounting part (12) is a cylinder with a diameter larger than the insulating light guide sleeve (11), and is provided with a thread, and the mounting part (12) is fixed at the front end of the shell (2) through the thread on the mounting part.

4. The test pencil according to claim 1, characterized in that the said knife bar connector (31) is a metal conductive pipe with an inner diameter larger than the knife bar (1), and a metal elastic sheet (311) extending radially is provided inside the said knife bar connector (31), when the knife bar (1) penetrates into the knife bar connector (31), the said metal elastic sheet (311) is pressed and contacted with the knife bar (1).

5. The test pencil according to claim 1, characterized in that the illuminating lamp (32) comprises a front illuminating lamp (321) and a rear illuminating lamp (322), the front illuminating lamp (321) is arranged in the holder connecting member (31) to directly irradiate light on the insulating light guide sleeve (11) on the holder (1), and the rear illuminating lamp (322) is arranged near the light guide ring (51) to allow the light to pass through the light guide ring (51).

6. The test pencil according to claim 1, characterized in that the housing (2) is provided with at least two guide slots (21) inside, and the width dimension of the at least two guide slots (21) meets the accuracy requirement of penetration of the electric plate (3).

7. The test pencil according to claim 6, characterized in that the housing (2) further comprises a power fixing member (41), the outer wall of the power fixing member (41) is provided with a guide post (42) along the axial direction, the guide post (42) is oppositely arranged on two sides of the outer wall of the power fixing member (41), and the guide post (42) is adapted to the guide groove (21) to be fixed in the housing (2).

8. The test pencil according to claim 7, characterized in that the power supply fixing member (41) comprises a fixing cavity (43) and a rear light channel (44), the fixing cavity (43) is used for fixing the power supply, and the rear light channel (44) is close to the rear lighting lamp (322).

9. Test pencil according to claim 7, characterized in that the outer diameter of the diaphragm (51) inside the housing (2) is larger than the outer diameter of the power fixture (41) to press the power fixture in the axial direction of the housing (2).

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