CN110514888A - Digital multimeter - Google Patents
Digital multimeter Download PDFInfo
- Publication number
- CN110514888A CN110514888A CN201910737586.2A CN201910737586A CN110514888A CN 110514888 A CN110514888 A CN 110514888A CN 201910737586 A CN201910737586 A CN 201910737586A CN 110514888 A CN110514888 A CN 110514888A
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- China
- Prior art keywords
- digital multimeter
- light
- shell
- key
- jack
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000012360 testing method Methods 0.000 claims abstract description 96
- 238000005259 measurement Methods 0.000 claims description 75
- 230000001681 protective effect Effects 0.000 claims description 38
- 210000003205 muscle Anatomy 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims 3
- 230000000694 effects Effects 0.000 abstract description 5
- 238000013461 design Methods 0.000 abstract description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 10
- 238000010586 diagram Methods 0.000 description 10
- 239000000741 silica gel Substances 0.000 description 10
- 229910002027 silica gel Inorganic materials 0.000 description 10
- 238000000034 method Methods 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 238000009529 body temperature measurement Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/12—Circuits for multi-testers, i.e. multimeters, e.g. for measuring voltage, current, or impedance at will
- G01R15/125—Circuits for multi-testers, i.e. multimeters, e.g. for measuring voltage, current, or impedance at will for digital multimeters
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The present invention discloses a kind of digital multimeter, the digital multimeter includes shell, circuit board and eyeglass, the circuit board is disposed in the housing, the front of the shell is equipped with display screen and touch key-press unit, the display screen and touch key-press unit with the circuit board electrical connection, the eyeglass is set to the front of the shell and completely covers the display screen and touch key-press unit, and the side of the shell is equipped with the multiple test pencil input jacks being inserted into for test pencil.Digital multimeter of the invention, by using touch key-press unit, and display screen and touch key-press unit are completely covered using eyeglass, so that the operating area of touch key-press unit has preferable waterproof effect, touch key-press unit is easy to operate and is hardly damaged, and by the way that test pencil input jack to be set on the side of shell, so that digital multimeter carries and uses more convenient convenient for slimming design.
Description
Technical field
The present invention relates to technical field of electrical measurement more particularly to a kind of digital multimeter.
Background technique
Present digital multimeter on sale on the market, the overwhelming majority are all that conventional belt knob is transferred the files bit function, also there is few portion
Divide the digital multimeter that pure silica gel push-button handoff functionality is directly used without knob.For transferring the files the number ten thousand of bit function with knob
With table, when use, needs to carry out position of transferring the files by rotation knob, and such user just needs a hand to hold digital multimeter
Fuselage, another hand rotates knob, do not free hand to held test pencil now, operates inconvenient, and uses knob tune
Gear, so that the waterproof effect of operation panel is also bad.And for using the digital multimeter of silica gel push-button handoff functionality, it is adjusting
When gear user need firmly pressing silica gel push-button, and each producer use silica gel push-button elastic force be it is different,
Some button key springs are very strong, and the dynamics of at this moment operation will be larger, some silica gel push-button elastic force it is small may pressing when
Time will be stuck and can not reset, and equally exists operation panel using silica gel push-button handoff functionality and prevent ineffective ask
Topic, more particularly noteworthy to be, the black grain of conduction of silica gel push-button bottom is in long-time and wiring board contact surface, using long
The case where will appear failure.
In addition, whether transferring the files the digital multimeter of bit function with knob, or use pure silica gel push-button handoff functionality
Digital multimeter, test pencil input jack are the fronts that digital multimeter is arranged in, and lead to the thickness of whole multimeter in this way
It is thicker, it has not been convenient to carry and operation is switched especially using the digital multimeter of silica gel push-button handoff functionality using silica gel push-button
It is also not easy to logarithm word multimeter because thickness is thicker when function and carries out one-handed performance.
Summary of the invention
The main purpose of the present invention is to provide a kind of digital multimeter of slimming, it is intended to realize taking for digital multimeter
Band and easy to use.
In order to achieve the above object, the present invention proposes that a kind of digital multimeter, the digital multimeter include shell, circuit
Plate and eyeglass, the circuit board are disposed in the housing, and the front of the shell is equipped with display screen and touch key-press unit, described
With the circuit board electrical connection, the eyeglass is set to the front of the shell and completely covers for display screen and touch key-press unit
The display screen and touch key-press unit, the side of the shell are equipped with the multiple test pencil input jacks being inserted into for test pencil.
Preferably, the touch key-press unit uses capacitance touch button or resistive touch key.
Preferably, the shell has panel, the backboard opposite with panel and between the panel and backboard
Side wall, the multiple test pencil input jack are set on the side wall of the shell, display screen described in face on the panel of the shell
Display window is offered, the touch key-press unit includes touch control part and interconnecting piece, and the touch control part includes multiple touch controlled keys,
The interconnecting piece is used for and circuit board electrical connection, corresponds to the multiple touch-control on the eyeglass or on the touch key-press unit
Key is respectively equipped with corresponding marking keys to indicate the position of touch of touch controlled key, by the lens surface touch controlled key
The indicated position of touch of mark can operate corresponding touch controlled key.
Preferably, the side wall include in the roof that is oppositely arranged and bottom wall and in the left wall and right wall being oppositely arranged,
The multiple test pencil input jack is set on the bottom wall.
Preferably, the fluted touching with for accommodating the touch key-press unit is arranged in the outer surface of the panel of the shell
Control portion, the panel of the shell in the edge of the groove have through-hole for the interconnecting piece of touch key-press unit pass through afterwards with
Circuit board electrical connection.
Preferably, the shell includes face-piece and dorsal shield, is enclosed an accommodating space by the face-piece and dorsal shield, described
Circuit board and display screen are set in the accommodating space, and the panel is formed on the face-piece, and the backboard is formed in described
On dorsal shield, the bottom end of the dorsal shield is equipped with bottom baffle, and the multiple test pencil input jack is set on the bottom baffle, the circuit
Plate is equipped with multiple jack elastic slices, each jack elastic slice is set in corresponding test pencil input jack.
Preferably, the top of the dorsal shield is equipped with top baffle, and the top of the circuit board is equipped with contactless voltage induced
Piece, the top baffle are equipped with the sensing chip receiving portion for accommodating the contactless voltage induced piece, and the sensing chip accommodates
Portion, which outwardly protrudes, is formed with protrusion.
Preferably, the top baffle is equipped with switch key, and the switch key is used to control the unlatching of digital multimeter
And closing.
Preferably, the multiple touch controlled key includes intelligent measure key, manual measurement key, high current/low current survey
It measures switching key, maximum/minimum measurement key, ac/dc measurement switching key and data and keeps function unlatching/pass
Close key.
Preferably, the multiple test pencil input jack is corresponded on the circuit board is equipped with multiple jack warning lights, it is described more
A jack warning light is respectively used to be lighted when corresponding test pencil input jack has test pencil to prompt user in corresponding table
Test pencil is inserted into input jack.
Preferably, the multiple jack warning light is corresponded on the eyeglass or on the panel of the shell be respectively equipped with phase
The jack prompt mark answered.
Preferably, the digital multimeter further includes multiple first light-guide devices, each first light-guide device and opposite
The jack warning light answered is oppositely arranged, and corresponding jack mentions on the light directing eyeglass for issuing the jack warning light
Indicating is known.
Preferably, first light-guide device includes light in part and light out part, the light in part peace of first light-guide device
Mounted in the inner surface of the panel of the shell, the panel of the shell corresponds to each first light-guide device and is equipped with for described first
The light hole that the light out part of light-guide device plugs.
Preferably, the multiple test pencil input jack is arranged at intervals on the bottom wall of the shell in a row, the multiple
First light-guide device is arranged in a row and is correspondingly arranged respectively with multiple test pencil input jacks.
Preferably, the quantity of the test pencil input jack is four, and respectively Super-Current Measurement input jack, low current are surveyed
It measures input jack, common end input jack and voltage/resistance and measures input jack.
Preferably, the multiple test pencil input jack is set on the bottom baffle, outside the multiple test pencil input jack
End is connected by the bottom baffle, is connected with splice muscle between two neighboring test pencil input jack, the splice muscle also with it is described
Bottom baffle connection.
Preferably, the test pencil input jack is corresponded on the face-piece and is equipped with the first positioning region, corresponds to institute on the dorsal shield
Test pencil input jack is stated equipped with the second positioning region, by first positioning region and the second positioning region to second positioning region into
Row installation positioning, first positioning region 1171 and the second positioning region are each formed with arc positioning groove, the inner surface of the face-piece
It being formed in two first card slots being oppositely arranged, the left and right ends of the bottom baffle are fastened on respectively in two first card slot,
The inner surface of the face-piece is also formed with the second card slot being connected between two first card slot, a side of the bottom baffle
Edge is fastened in second card slot.
Preferably, the digital multimeter further includes headlamp, and the headlamp is mounted on the back side of circuit board, the shell
The backboard of body corresponds to the headlamp and is equipped with light-emitting window, is equipped with lampshade at the light-emitting window.
Preferably, the side wall of the shell is equipped with headlamp key, and the headlamp key is used to control the unlatching of headlamp
And closing.
Preferably, non-contact voltage/firewire measurement switching key, the non-contact electricity are additionally provided on the side wall of the shell
Pressure/firewire measurement switching key is used to measure in non-contact voltage and switch between function and firewire detection function.
Preferably, on off test indicator light is additionally provided on the circuit board, the on off test indicator light is for carrying out
When on off test according on off test result issue corresponding color light come indicate on off test as a result, the digital multimeter also
Including the second light-guide device, the light out part that the panel of the shell corresponds to second light-guide device is equipped with light-emitting window, and described the
Two light-guide devices are used to show the light that the on off test indicator light issues through light-emitting window guiding eyeglass.
Preferably, the circuit board includes the first plate body and the second plate body, and first plate body and the second plate body are in shell
Thickness direction mutually stagger setting, first plate body corresponds to the display screen setting, and second plate body corresponds to the touching
Push-button unit setting is touched, the bottom end of first plate body is electrically connected with the top of second plate body, and second plate body is opposite
It is arranged in the first plate body closer to the panel 111.
Preferably, the dorsal shield of the digital multimeter is equipped with battery compartment with described in for installing battery, the backboard is corresponding
Battery compartment is equipped with Hatch Opening, and detachable battery lid is equipped on the dorsal shield for closing the Hatch Opening, the battery compartment face
The second plate body setting.
Preferably, the inner surface of the battery cover is equipped with battery locating slot to be positioned and be limited to battery.
Preferably, the second plate body of the circuit board is equipped with the first protective tube and the second protective tube, first insurance
Pipe and the second protective tube be respectively used to carry out overcurrent protection when Super-Current Measurement and small current measurement, first protective tube and
Second protective tube is located at the left and right sides of the battery compartment.
A kind of digital multimeter proposed by the present invention completely covers display screen by touch key-press unit, and using eyeglass
With touch key-press unit, so that the operating area of touch key-press unit has preferable waterproof effect, touch key-press unit is operated
It conveniently and is hardly damaged, and by the way that test pencil input jack to be set on the side of shell, so that digital multimeter is convenient for slimming
Design, carries and uses more convenient.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of one preferred embodiment of digital multimeter of the present invention.
Fig. 2 is the structural schematic diagram that digital multimeter shown in Fig. 1 is regarded by another visual angle.
Fig. 3 is the decomposition diagram of digital multimeter shown in Fig. 1.
Fig. 4 is the decomposition diagram of digital multimeter shown in Fig. 2.
Fig. 5 is the further exploded view of members in digital multimeter shown in Fig. 3.
Fig. 6 is the further exploded view of members in digital multimeter shown in Fig. 4.
Fig. 7 is the example that marking keys in digital multimeter shown in Fig. 1, jack prompt mark and display screen show content.
Fig. 8 is the structural schematic diagram of an embodiment of protective case compatible with digital multimeter shown in Fig. 1.
Fig. 9 is the schematic diagram that protective case shown in Fig. 8 is arranged in digital multimeter shown in Fig. 1.
Figure 10 is the schematic diagram that protective case and digital multimeter shown in Fig. 9 are regarded by another visual angle.
In order to keep technical solution of the present invention clearer, clear, it is described in further detail below in conjunction with attached drawing.
Specific embodiment
Referring to figs. 1 to Fig. 6, present pre-ferred embodiments propose that a kind of digital multimeter, the digital multimeter include shell
Body 11, circuit board 12 and eyeglass 13.The circuit board 12 is set in the shell 11, and the front of the shell 11 is equipped with display screen
14 and touch key-press unit 15, and the display screen 14 and touch key-press unit 15 are electrically connected with the circuit board 12, it is described
Eyeglass 13 is set to the front of the shell 11 and completely covers the display screen 14 and touch key-press unit 15, the shell 11
Side is equipped with the multiple test pencil input jacks 16 being inserted into for test pencil." the complete covering " refers to eyeglass 13 for display screen 14 and touches
15 region of push-button unit all covers and eyeglass 13 does not open up through-hole for display screen 14 and 15 region of touch key-press unit.
The digital multimeter of the present embodiment completely covers display screen 14 by touch key-press unit 15, and using eyeglass 13
With touch key-press unit 15 so that the operating area of touch key-press unit 15 have preferable waterproof effect, touch key-press unit
15 is easy to operate and be hardly damaged, and by the way that test pencil input jack 16 to be set on the side of shell 11, so that digital multimeter
Convenient for slimming design, carry and use more convenient.
The touch key-press unit 15 uses capacitance touch button or resistive touch key.
The shell 11 has panel 111, the backboard 112 opposite with panel 111 and is located at the panel 111 and back
Side wall (unlabeled in figure) between plate 112, the multiple test pencil input jack 16 are set on the side wall of the shell 11.
Display screen 14 described in face offers display window 111 on the panel 111 of the shell 11.The touch key-press list
Member 15 includes touch control part 151 and interconnecting piece 152, and the touch control part 151 includes multiple touch controlled keys, and the interconnecting piece 152 is used for
It is connect with circuit board 12, on the eyeglass 13 or corresponds to the multiple touch controlled key on the touch key-press unit 15 and set respectively
There are corresponding marking keys to indicate the position of touch of touch controlled key, it is signified by being identified in the 13 surface touch controlled key of eyeglass
The position of touch shown can operate corresponding touch controlled key.Eyeglass 13 can be arranged in marking keys by way of silk-screen
On the upper or described touch key-press unit 15, it is preferably provided on eyeglass 13.
The side wall includes in the roof 113 and bottom wall 114 being oppositely arranged and in the left wall 115 and the right side being oppositely arranged
Wall 116.In the present embodiment, the multiple test pencil input jack 16 is set on the bottom wall 114.In other embodiments, institute
Stating multiple test pencil input jacks 16 can also be other forms, for example, the multiple test pencil input jack 16 is provided entirely in a left side
On wall 115；The multiple test pencil input jack 16 is provided entirely in right wall 116；The multiple test pencil input jack 16 is distributed
In any two in left wall 115, right wall 116 and bottom wall 114 or the multiple test pencil input jack 16 is distributed in left wall
115, in right wall 116 and bottom wall 114.
The shell 11 includes face-piece 117 and dorsal shield 118, is enclosed receiving sky by the face-piece 117 and dorsal shield 118
Between (do not indicated in figure), the circuit board 12 and display screen 14 are set in the accommodating space.The panel 111 is formed in described
On face-piece 117, the backboard 112 is formed on the dorsal shield 118.The bottom end of the dorsal shield 118 is equipped with bottom baffle 119, described
Bottom baffle 119 constitutes a part of the bottom wall 114 of the shell 11, and the multiple test pencil input jack 16 is set to the bottom baffle
On 119.The circuit board 12 is equipped with multiple jack elastic slices 121, each jack elastic slice 121 is set to the input of corresponding test pencil and inserts
In hole 16.
The top of the dorsal shield 118 is equipped with top baffle 120, and the top of the circuit board 12 is equipped with contactless voltage induced
Piece 122, the top baffle 120 are equipped with the sensing chip receiving portion 1201 for accommodating the contactless voltage induced piece 122.Institute
State sensing chip receiving portion 1201 outwardly protrude be formed with protrusion 1202, contactless voltage induced piece 122 can be made to the greatest extent may be used in this way
The accuracy of contactless voltage measurement is improved close to determinand in energy ground.
In the present embodiment, the top baffle 120 is equipped with switch key 123, and the switch key 123 is for controlling number
The opening and closing of word multimeter.
In the present embodiment, the outer surface setting fluted 1112 of the panel 111 of the shell 11 is with described for accommodating
The panel 111 of the touch control part 151 of touch key-press unit 15, the shell 11 has through-hole in the edge of the groove 1112
1113 are electrically connected with circuit board 12 afterwards so that the interconnecting piece 152 of touch key-press unit 15 passes through.
In the present embodiment, in the present embodiment, the quantity of test pencil input jack 16 is four, respectively Super-Current Measurement
Input jack 10A, small current measurement input jack mA, common end input jack COM and voltage/resistance measure input jack V,
The multiple touch controlled key includes that intelligent measure key SMART, manual measurement key MANUAL, high current/small current measurement are cut
Key mA/A, maximum/minimum measurement key MAX/MIN, ac/dc measurement switching key AC/DC and data are changed to keep
Key HOLD/REL is opened/closed to function, totally six touch controlled keys.As shown in fig. 7, giving corresponding to six touch controlled keys
The example of marking keys, six touch controlled keys are lined up two rows three and are arranged, and can be wanted according to designed measurement function in practical application
It asks and the quantity and distributing position of touch controlled key is adjusted.
Intelligent measure key SMART is for switching into intelligent measure functional mode；
Manual measurement key MANUAL is used to measure the switching of function manually, for example, pressing after booting by manual measurement
Key MANUAL is once switched to low current mV measurement function, can measure exchange mV, direct current mV, frequency under this function；By exchange/
DC measurement switching key AC/DC key switches alternating current and direct current；After booting, it is switched to frequency twice by manual measurement key MANUAL
Rate, duty ratio are than measurement；It can measure frequency and duty ratio under this function；After booting, three times by manual measurement key MANUAL
It is switched to capacitance measurement, can measure capacitor under this function；After booting, two poles are switched to tetra- times by manual measurement key MANUAL
Pipe measurement, can measure diode under this function；After booting, it is switched to temperature measurement by manual measurement key MANUAL five times,
It can measure temperature under this function；
High current/small current measurement switching key mA/A between Super-Current Measurement and small current measurement for being cut
It changes.For example, test pencil is inserted into small current measurement input jack mA under arbitrarily measurement function, instrument automatically switches to after booting
Low current mA measures function, can measure exchange uA/mA, direct current uA/mA and frequency under this function, cuts by ac/dc measurement
Change key AC/DC key switching alternating current and direct current；Test pencil is inserted into A jack under arbitrarily measurement function, instrument automatically switches to big electricity
It flows A and measures function, can measure exchange A, direct current A and frequency under this function；Press ac/dc measurement switching key AC/DC key
Switch alternating current and direct current；It can be measured in low current mA by high current/small current measurement switching key mA/A and high current A is surveyed
Amount；
Maximum/minimum measurement key MAX/MIN is used to enter maximum value of the MAX/MIN mode to detect reading
(MAX) and minimum value (MIN)；
Ac/dc measurement switching key AC/DC is used to carry out the switching of AC measurment and DC measurement；
Data keep function to open/close key HOLD/REL and keep function for opening or closing data.
In the present embodiment, the multiple test pencil input jack 16 is corresponded on the circuit board 12 to prompt equipped with multiple jacks
Lamp 123, the multiple jack warning light 123 are respectively used to light when corresponding test pencil input jack 16 has test pencil with prompt
User is inserted into test pencil in corresponding test pencil input jack 16.On the eyeglass 13 or on the panel 111 of the shell 11
Corresponding the multiple jack warning light 123 is respectively equipped with corresponding jack prompt mark.Jack prompt mark can pass through silk-screen
Mode is arranged on eyeglass 13 or on the panel 111 of the shell 11, is preferably provided on eyeglass 13.
In the present embodiment, digital multimeter further includes multiple first light-guide devices 17, each first light-guide device 17
It is oppositely arranged with a corresponding jack warning light 123, the light directing eyeglass 13 for issuing the jack warning light 123
Upper corresponding jack prompt mark.As shown in fig. 7, giving the example of four jack prompt marks, high current survey is respectively corresponded
It measures input jack 10A, small current measurement input jack mA, common end input jack COM and voltage/resistance and measures input jack
V.Wherein voltage/resistance measurement input jack V can be used for firewire detection, resistance measurement, capacitance measurement, diode measurement, on-off
Measurement, voltage measurement, frequency measurement, duty ratio measuring and temperature measurement, voltage/resistance measurement input jack V's inserts in Fig. 7
The prompt mark of jack corresponding to hole warning light 123 gives symbol corresponding to these functions.
First light-guide device 17 includes light in part 171 and light out part 172, and the light in part 171 is mounted on the shell
The inner surface of the panel 111 of body 11, each corresponding first light-guide device 17 of the panel 111 of the shell 11 are equipped with for described the
The light hole 1114 that the light out part 172 of one light-guide device 17 plugs.
The multiple test pencil input jack 16 is arranged at intervals on the bottom wall 114 of the shell 11 in a row, the multiple
First light-guide device 17 is arranged in a row and is correspondingly arranged respectively with multiple test pencil input jacks 16.In the present embodiment, test pencil
The quantity of input jack 16 is four, respectively Super-Current Measurement input jack 10A, small current measurement input jack mA, public
Input jack COM and voltage/resistance is held to measure input jack V.Four test pencil input jacks 16 are arranged at intervals in a row
On the bottom wall 114 of the shell 11, four the first light-guide devices 17 be arranged in a row and respectively with four test pencil input jacks 16
Face, as shown in Figure 7.
In the present embodiment, multiple test pencil input jacks 16 are set on the bottom baffle 119, multiple test pencil input jacks 16
Outer end connected by the bottom baffle 119, be connected with splice muscle 1191 between two neighboring test pencil input jack 16, it is described plus
Plate muscle 1191 is also connect with the bottom baffle 119.By be arranged splice muscle 1191, can with the stability of test pencil input jack 16,
It shakes when test pencil being prevented to be inserted into or firmly plus suddenly damages test pencil input jack 16 in swapping process.
The test pencil input jack 16 is corresponded on the face-piece 117 equipped with the first positioning region 1171, it is right on the dorsal shield 118
It answers the test pencil input jack 16 to be equipped with the second positioning region 1181, passes through first positioning region 1171 and the second positioning region 1181
Installation positioning is carried out to second positioning region 1181.First positioning region 1171 and the second positioning region 1181 are each formed with arc
Shape locating slot.
The inner surface of the face-piece 117 is formed in two first card slots 1172 being oppositely arranged, a left side for the bottom baffle 119
Right both ends are fastened on respectively in two first card slot 1172.The inner surface of the face-piece 117, which is also formed with, is connected to described two
The second card slot 1173 between first card slot 1172, the one side edge of the bottom baffle 119 are fastened on second card slot 1173
It is interior.By the first card slot 1172 of setting and the second card slot 1173, it can be realized and positioning and limit are installed to bottom baffle 119, with side
Just the installation of bottom baffle 119.
The digital multimeter further includes headlamp 18, and the headlamp 18 is mounted on the back side of circuit board 12, the shell
The corresponding headlamp 18 of the backboard 112 of body 11 is equipped with light-emitting window 1121.Lampshade 19 is equipped at the light-emitting window 1121.
The side wall of the shell 11 is equipped with headlamp key 20, and the headlamp key 20 is used to control the unlatching of headlamp 18
And closing.
It is additionally provided with non-contact voltage/firewire measurement switching key 21 on the side wall of the shell 11, the non-contact voltage/
Firewire measurement switching key 21 is used to measure in non-contact voltage and switch between function and firewire detection function.For example, opening
After machine, non-contact voltage/firewire measurement switching key 21 is pressed under arbitrarily measurement function, measures function into non-contact voltage NCV
Energy；Live is measured by the recyclable switching non-contact voltage NCV measurement of non-contact voltage/firewire measurement switching key 21 and firewire again
Function；Long-pressing non-contact voltage/firewire measurement switching key 21 or intelligent measure key SMART or manual measurement key again
MANUAL exits non-contact voltage/firewire measurement function.The dorsal shield 118 of the digital multimeter is equipped with battery compartment 22 for pacifying
Packed battery 23 is the power supply of entire digital multimeter by battery 23.The corresponding battery compartment 22 of the backboard 112 is equipped with Hatch Opening
(not indicating in figure) is equipped with detachable battery lid 24 on the dorsal shield 118 for closing the Hatch Opening, to facilitate battery 23
Installation and removal.
The inner surface of the battery cover 24 is equipped with battery locating slot 241 battery 23 is positioned and be limited, by setting
Battery locating slot 241 is set, so that the installation fixation of battery 23 is relatively reliable.
In the present embodiment, on off test indicator light 25, the on off test indicator light are additionally provided on the circuit board 12
25 indicate on off test as a result, for example for issuing the light of corresponding color according on off test result when carrying out on off test
The connection of greening light representations, rubescent light representations disconnect.The digital multimeter further includes the second light-guide device 26, the shell 11
The light out part 261 of corresponding second light-guide device 26 of panel 111 is equipped with light-emitting window 1115, and second light-guide device 26 is used for
The light that the on off test indicator light 25 issues is shown through the light-emitting window 1115 guiding eyeglass 13.
In the present embodiment, the circuit board 12 includes the first plate body 127 and the second plate body 128, first plate body 127
Setting, the corresponding institute of first plate body 127 are mutually staggered in the thickness direction of the shell 11 of digital multimeter with the second plate body 128
The setting of display screen 14 is stated, the corresponding touch key-press unit 15 of second plate body 128 is arranged, the bottom of first plate body 127
End is electrically connected with the top of second plate body 128, and second plate body 128 is relative to the first plate body 127 closer to the face
Plate 111 is arranged, the setting of the second plate body 128 described in 22 face of battery compartment.By the shell 11 that digital multimeter is arranged in
Thickness direction mutually staggers the first plate body 127 and the second plate body 128, and the first plate body 127 is used to place display screen 14, and face the
Battery compartment 22 is arranged in two plate bodys 128, and the thickness of overall digital multimeter is enabled to be made thinner as far as possible in this way, more sharp
It is designed in the slimming of digital multimeter.
In the present embodiment, the second plate body 128 of the circuit board 12 is equipped with the first protective tube F1 and the second protective tube
F2, the first protective tube F1 and the second protective tube F2 are respectively used to carry out over current protection when Super-Current Measurement and small current measurement
Shield.The first protective tube F1 and the second protective tube F2 is located at the left and right sides of the battery compartment 22.
Fig. 8 is the structural schematic diagram of an embodiment of protective case 29 compatible with digital multimeter shown in Fig. 1, and Fig. 9 is
Protective case shown in Fig. 8 is arranged the schematic diagram in digital multimeter shown in Fig. 1, and Figure 10 is protective case and digital versatile shown in Fig. 9
The schematic diagram that table is regarded by another visual angle.Protective case 29 is for being set on the shell 11 of the digital multimeter to digital versatile
Table is protected.
The front openings of the protective case 29, including rear wall 290 and the side wall extended forward by 290 periphery of rear wall (in figure
Do not indicate), the side wall of the protective case 29 is equipped with multiple first through hole 291 for the corresponding test pencil of test pencil insertion digital multimeter
In input jack 16, the rear wall 291 of the protective case 29 is equipped with the second through-hole 292 so that the headlamp 18 of digital multimeter goes out
Light is additionally provided with third through-hole 293 for the protrusion of the sensing chip receiving portion 1201 of digital multimeter on the side wall of the protective case 29
1202 stretch out, and the switch key 123 that fourth hole 294 is additionally provided on the side wall of the protective case 29 for digital multimeter stretches out,
Fifth hole 295 is additionally provided on the side wall of the protective case 29 for non-contact voltage/firewire measurement switching of digital multimeter
Key 21 stretches out, and is additionally provided with the 6th through-hole 296 on the side wall of the protective case 29 for non-contact voltage/fire of digital multimeter
Line measurement switching key 21 stretches out.
In the present embodiment, the side wall of the protective case 29 includes in opposite side wall 297 and downside wall 298 and is in
Opposite left side wall 299 and right side wall 300, the multiple first through hole 291 are set on the downside wall 298, and the third is logical
Hole 293 is set in the side wall 297, and the fourth hole 294 is set in the side wall 297, and the fifth hole 295 is set
On one of the left side wall 299 and right side wall 300 are a, the 6th through-hole 296 is set to the left side wall 299 and the right side
On wherein another of side wall 300.
Tread plate 301,302 is respectively equipped on the left side wall 299 and right side wall 300 of the protective case 29.The protective case
The outer surface of 29 rear wall 290 is equipped with the first anti-skid bulge portion 303 close to left side wall 299, the rear wall 290 of the protective case 29
Outer surface is equipped with the second anti-skid bulge portion 304 close to right side wall 300, and the outer surface of the rear wall 290 of the protective case 29 is the bottom of close to
Side wall 298 is equipped with third anti-skid bulge portion 305, and by the way that tread plate 301,302 is arranged, the first anti-skid bulge portion 303, second is anti-skidding
Lug boss 304 and third anti-skid bulge portion 305, good antiskid effect can be played when holding protective case 29.
The rear wall 290 of the protective case 29 is additionally provided with multiple support protrusions 306, the multiple support protrusion 306 for pair
Digital multimeter is supported, convenient that digital multimeter is picked up from placed side.
The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all utilizations
Equivalent structure made by description of the invention and accompanying drawing content or process transformation, are applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (25)
1. a kind of digital multimeter, which is characterized in that the digital multimeter includes shell, circuit board and eyeglass, the circuit
Plate is disposed in the housing, and the front of the shell is equipped with display screen and touch key-press unit, the display screen and touch key-press
Unit with the circuit board electrical connection, the eyeglass be set to the shell front and completely cover the display screen and touch
Push-button unit, the side of the shell are equipped with the multiple test pencil input jacks being inserted into for test pencil.
2. digital multimeter as described in claim 1, which is characterized in that the touch key-press unit uses capacitance touch button
Or resistive touch key.
3. digital multimeter as described in claim 1, which is characterized in that the shell has panel, the back opposite with panel
Plate and the side wall between the panel and backboard, the multiple test pencil input jack are set on the side wall of the shell,
Display screen described in face offers display window on the panel of the shell, and the touch key-press unit includes touch control part and connection
Portion, the touch control part include multiple touch controlled keys, and the interconnecting piece is used for and circuit board electrical connection, on the eyeglass or described
The multiple touch controlled key is corresponded on touch key-press unit is respectively equipped with corresponding marking keys to indicate the touch-control of touch controlled key
Position, by that can be grasped to corresponding touch controlled key in the indicated position of touch of lens surface touch controlled key mark
Make.
4. digital multimeter as claimed in claim 3, which is characterized in that the side wall includes in the roof and bottom being oppositely arranged
Wall and in the left wall and right wall being oppositely arranged, the multiple test pencil input jack is set on the bottom wall.
5. digital multimeter as claimed in claim 3, which is characterized in that the outer surface setting of the panel of the shell is fluted
With the touch control part for accommodating the touch key-press unit, the panel of the shell in the edge of the groove have through-hole with
The interconnecting piece of push-button unit for touch passes through afterwards and circuit board electrical connection.
6. digital multimeter as claimed in claim 4, which is characterized in that the shell includes face-piece and dorsal shield, by the face
Shell and dorsal shield are enclosed an accommodating space, and the circuit board and display screen are set in the accommodating space, and the panel is formed
On the face-piece, the backboard is formed on the dorsal shield, and the bottom end of the dorsal shield is equipped with bottom baffle, and the multiple test pencil is defeated
Enter jack on the bottom baffle, the circuit board is equipped with multiple jack elastic slices, each jack elastic slice is set to corresponding
In test pencil input jack.
7. digital multimeter as claimed in claim 4, which is characterized in that the top of the dorsal shield is equipped with top baffle, the electricity
The top of road plate is equipped with contactless voltage induced piece, and the top baffle is equipped with for accommodating the contactless voltage induced piece
Sensing chip receiving portion, the sensing chip receiving portion, which outwardly protrudes, is formed with protrusion.
8. digital multimeter as claimed in claim 7, which is characterized in that the top baffle is equipped with switch key, described to open
Close button is used to control the opening and closing of digital multimeter.
9. digital multimeter as claimed in claim 3, which is characterized in that the multiple touch controlled key include intelligent measure by
Key, manual measurement key, high current/small current measurement switching key, maximum/minimum measurement key, ac/dc measurement
Switching key and data keep function open/close key.
10. digital multimeter as claimed in claim 4, which is characterized in that it is defeated to correspond to the multiple test pencil on the circuit board
Enter jack equipped with multiple jack warning lights, the multiple jack warning light is respectively used to have test pencil in corresponding test pencil input jack
When light to prompt user to be inserted into test pencil in corresponding test pencil input jack.
11. digital multimeter as claimed in claim 10, which is characterized in that on the eyeglass or on the panel of the shell
Corresponding the multiple jack warning light is respectively equipped with corresponding jack prompt mark.
12. digital multimeter as claimed in claim 11, which is characterized in that the digital multimeter further includes multiple first leading
Optical element, each first light-guide device is oppositely arranged with a corresponding jack warning light, for prompting the jack
Corresponding jack prompt mark on the light directing eyeglass that lamp issues.
13. digital multimeter as claimed in claim 12, which is characterized in that first light-guide device includes light in part and goes out
Light portion, the light in part of first light-guide device are mounted on the inner surface of the panel of the shell, and the panel of the shell is corresponding
Each first light-guide device is equipped with the light hole plugged for the light out part of first light-guide device.
14. digital multimeter as claimed in claim 11, which is characterized in that the multiple test pencil input jack is in a row interval
Be arranged on the bottom wall of the shell, the multiple first light-guide device in a row be arranged and respectively with multiple test pencil input jacks
It is correspondingly arranged.
15. the digital multimeter as described in any one of claim 1 to 14, which is characterized in that the test pencil input is inserted
The quantity in hole be four, respectively Super-Current Measurement input jack, small current measurement input jack, common end input jack and
Voltage/resistance measures input jack.
16. digital multimeter as claimed in claim 6, which is characterized in that the multiple test pencil input jack is set to the bottom
On baffle, the outer end of the multiple test pencil input jack is connected by the bottom baffle, between two neighboring test pencil input jack
It is connected with splice muscle, the splice muscle is also connect with the bottom baffle.
17. the digital multimeter as described in claim 6 or 16, which is characterized in that correspond to the test pencil input on the face-piece
Jack is equipped with the first positioning region, and the test pencil input jack is corresponded on the dorsal shield equipped with the second positioning region, passes through described first
Positioning region and the second positioning region carry out installation positioning, first positioning region 1171 and the second positioning region to second positioning region
It is each formed with arc positioning groove, the inner surface of the face-piece is formed in two first card slots being oppositely arranged, the bottom baffle
Left and right ends are fastened on respectively in two first card slot, and the inner surface of the face-piece, which is also formed with, is connected to two first card
The second card slot between slot, the one side edge of the bottom baffle are fastened in second card slot.
18. digital multimeter as claimed in claim 3, which is characterized in that the digital multimeter further includes headlamp, described
Headlamp is mounted on the back side of circuit board, and the backboard of the shell corresponds to the headlamp equipped with light-emitting window, the optical window out
Lampshade is equipped at mouthful.
19. digital multimeter as claimed in claim 18, which is characterized in that the side wall of the shell is equipped with headlamp key,
The headlamp key is used to control the opening and closing of headlamp.
20. digital multimeter as claimed in claim 3, which is characterized in that be additionally provided with non-contact electricity on the side wall of the shell
Pressure/firewire measurement switching key, the non-contact voltage/firewire measurement switching key be used for non-contact voltage measurement function and
It is switched between firewire detection function.
21. digital multimeter as described in claim 1, which is characterized in that be additionally provided on off test instruction on the circuit board
Lamp, the on off test indicator light refer to for issuing the light of corresponding color according on off test result when carrying out on off test
Show on off test as a result, the digital multimeter further includes the second light-guide device, the panel of the shell corresponds to described second and leads
The light out part of optical element is equipped with light-emitting window, and the light that second light-guide device is used to issue the on off test indicator light is through institute
Light-emitting window guiding eyeglass is stated to be shown.
22. digital multimeter as claimed in claim 6, which is characterized in that in the present embodiment, the circuit board includes first
Plate body and the second plate body, first plate body and the second plate body mutually stagger setting, first plate in the thickness direction of shell
Body corresponds to the display screen setting, and second plate body corresponds to the touch key-press unit setting, the bottom end of first plate body
It is electrically connected with the top of second plate body, second plate body is arranged relative to the first plate body closer to the panel 111.
23. digital multimeter as claimed in claim 22, which is characterized in that the dorsal shield of the digital multimeter is equipped with battery compartment
With for installing battery, the backboard corresponds to the battery compartment and is equipped with Hatch Opening, detachable battery lid is installed on the dorsal shield
For closing the Hatch Opening, the setting of the second plate body described in the battery compartment face.
24. digital multimeter as claimed in claim 23, which is characterized in that the inner surface of the battery cover is positioned equipped with battery
Slot is to position battery and be limited.
25. digital multimeter as claimed in claim 23, which is characterized in that the second plate body of the circuit board is equipped with first
Protective tube and the second protective tube, when first protective tube and the second protective tube are respectively used to Super-Current Measurement and small current measurement
Overcurrent protection is carried out, first protective tube and the second protective tube are located at the left and right sides of the battery compartment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910737586.2A CN110514888A (en) | 2019-08-08 | 2019-08-08 | Digital multimeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910737586.2A CN110514888A (en) | 2019-08-08 | 2019-08-08 | Digital multimeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110514888A true CN110514888A (en) | 2019-11-29 |
Family
ID=68625679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910737586.2A Pending CN110514888A (en) | 2019-08-08 | 2019-08-08 | Digital multimeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110514888A (en) |
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