CN2708237Y

CN2708237Y - High protective capacitor grid electronic ruler

Info

Publication number: CN2708237Y
Application number: CN 200420077328
Authority: CN
Inventors: 杨荣珍
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-07-21
Filing date: 2004-07-21
Publication date: 2005-07-06
Anticipated expiration: 2014-07-21

Abstract

The utility model discloses a high protective capacitor grid electronic ruler which is manufactured in the principle of the linear displacement capacitor grid, and the high protective capacitor grid electronic ruler can resist oily soil, liquid splashing and dust adhesion. The high protective capacitor grid electronic ruler is characterized in that an air gap between movable and fixed grid electrodes is arranged in a movable protective space. No matter where the protective space moves, the fixed grid electrode outside the protective space is covered by a thin band which is appressed to the surface of the fixed grid electrode, and the fixed grid electrode can not be polluted. The normal dielectric coefficient of the air gap between the movable and fixed grid electrodes can not be polluted to be abnormal. The high protective capacitor grid electronic ruler has the advantages of simple structure, easy manufacturing, good cost performance and strong practicability.

Description

High protection volume grate electronic chi

(1) technical field

The utility model relates to a kind of length measurer, be specially a kind of with displacement of the lines hold that the grid principle is made, can prevent that greasy dirt, the anti-liquid attached height that spatters, prevents dust protects the volume grate electronic chi.

(2) technical background

Holding the grid principle with angular displacement compares, the volume grate electronic chis such as slide calliper rule, scale, height gauge and pit gauge that hold the making of grid principle with displacement of the lines are the volume grate electronic chis that present technology maturity is the highest, turnout is maximum, application surface is the widest, price is also minimum, are extensive use of in manufacturing industry.But at present the protective capacities at this series products of usefulness is very low, be subjected to the influence of polluters such as greasy dirt, liquid spatter, dust after, precise decreasing, show inaccurately, make range of application, environment for use and the operation of this series products require all to be restricted.

Below with reference to Fig. 1～Fig. 4 brief description at present in ordinary construction and existing defective thereof usefulness, hold traditional volume grate electronic chi that the grid principle makes with displacement of the lines.As shown in Figure 1, the volume grate electronic chi comprises main scale 101 and secondary chi 102, and selects measuring jaw 103 and the pit gauge bar 104 made according to the different cultivars of volume grate electronic chi and effect.Secondary chi 102 is sleeved on the main scale 101 and along main scale 101 and moves around.The transversal section of main scale 101 as shown in Figure 2; cementation has the fixed grid electrode of being made by printed circuit board (PCB) 106 on the blade 105 of main scale 101; fixed grid electrode 106 is isometric with blade 105; the surperficial cementation of fixed grid electrode 106 have by plastic sheeting make and with fixed grid electrode 106 wide isometric diaphragms 107; its objective is that protection fixed grid electrode 106 is not subjected to extraneous hard thing to draw damage; two grooves 108 on the transversal section are that technology is required, can mount on earth really to guarantee fixed grid electrode 106.The transversal section of secondary chi 102 as shown in Figure 3, install case 110 on the chi frame 109 of secondary chi 102, be fixed with the moving grid electrode and the metering circuit of making on the case 110, also be fixed with display 112 and button 113 and button cell (not drawing among the figure) on the case 110 by printed circuit board (PCB) 111.Transversal section behind main scale 101 and secondary chi 102 suits as shown in Figure 4, the moving grid electrode is to keep a suitable clearance 114 to form electric capacity between printed circuit board (PCB) 111 and the fixed grid electrode 106.When secondary chi 102 when main scale 101 moves, the moving grid electrode is to produce relative motion between printed circuit board (PCB) 111 and the fixed grid electrode 106 and electric capacitance change occurs, the variation of the variation reflection amount of movement of electric capacity is carried out numeral by display 112 and is shown after metering circuit is handled.When the volume grate electronic chi uses under the most general shop condition; because diaphragm 107 surfaces inevitably can be retained the operator and be held main scale 101 attachs at last greasy dirt and sweat stain; or retention has the machine tool coolant of splash; or retain and to have attached polluters such as dust during such as wheel grinding; it is that clearance 114 due normal dielectric coefficients are damaged between printed circuit board (PCB) 111 and the fixed grid electrode 106 that these polluters will make the moving grid electrode; under abnormal dielectric coefficient condition; therefore the variation of electric capacity can not expect to obtain correct precision measurement with the variation of not correct reflection amount of movement.Analyze the contaminated and reason destroyed of the normal dielectric coefficient of clearance 114 from structure; be because the diaphragm 107 shown in Fig. 2 is static fixed grid electrode 106 surfaces that cement in; be not in printed circuit board (PCB) 111 is included in the moving grid electrode shown in Fig. 3; thereby its position is 114 li of clearances between moving, fixed grid electrode, and the polluter that retain on its surface is also polluted clearance 114 with regard to being in 114 li of clearances.

In No. 96104062 Chinese patents, disclosed a kind of with displacement of the lines hold that the grid principle is made, can immersion work and can dustproof volume grate electronic slide calliper rule, but complex structure, member is a lot, some technical requirement is close to harsh, be difficult to realize, simultaneously traditional relatively volume grate electronic slide calliper rule volume increases many, and is all not really desirable to fabricator and user.

In No. 98116518.4 Chinese patents, disclosed and a kind ofly held with angular displacement that the grid principle makes, the volume grate electronic slide calliper rule of work can soak, no gap meshed gears that it adopted and the miscellaneous complexity of rack transmission system, the more important thing is the long-range motive seal that can't solve tooth bar, after causing microgranular polluter to fall between cog, slide calliper rule can't smooth and easyly move, let alone be applied to woodworking machinery, the occasion of dust from flying such as powder metallurgy, simultaneously owing to must be converted to twice value conversion that the angular displacement electric signal is converted to the displacement of the lines electric signal again through mechanical amount of movement, thereby the inaccessible manufacturing accuracy of holding the volume grate electronic slide calliper rule of grid principle making with displacement of the lines of manufacturing accuracy.

In No. 02145659.3 Chinese patent, disclosed another kind of with angular displacement appearance grid principle volume grate electronic slide calliper rule that make, that can soak work, though the no tooth bar friction gearing that it adopted has been avoided the disadvantage of tooth bar transmission, but can not prevent dust and need the defective of twice value conversion still to exist, in order to guarantee that the friction gearing process a bit interruption can not occur fully continuously, then high all the better simultaneously to the requirement of environment and operation.

In addition, two kinds of electronic calipers of No. 96108034 Chinese patents and the work of soaking that No. 98107990 Chinese patent disclosed, what adopt respectively is inductance and magnetic resistance principle, has completely lost the power consumptive province that holds the grid principle and had, the advantage of not being afraid of magnetic.

The behaviour in service of analytical electron chi, the situation that needs immersion work is very special and rare, maximum, the most generally the pollution condition of Chu Xianing be the operator be stained with greasy dirt and sweat stain on hand the time remove the grasping electronic ruler, perhaps the water oil base cutting fluid of lathe is splashed on the electronic ruler, fine particulate matter during perhaps as wheel grinding attaches on electronic ruler, these pollution factors are only the priority of protection of electronic ruler, if only in order to reach the purpose of the work of soaking, and abandoned the distinctive power consumptive province of displacement of the lines volume grate electronic chi, be not afraid of magnetic, the precision height, simple in structure, volume is small and exquisite, with low cost, be easy to produce these and do not allow the valuable technical advantage ignored, the technology cost is obviously high.

(3) utility model content

Technical purpose of the present utility model is: by to fixed grid electrode and moving, the long-range of clearance is dynamically topped between the fixed grid electrode, provide a kind of and hold with displacement of the lines that the grid principle makes, with slide calliper rule, scale, height gauge and pit gauge form occur, volume grate electronic chi with high protective capacities, the work though can not soak, but can prevent greasy dirt, anti-liquid spatters, dustproof attached, be subjected to the grasped of operator with greasy dirt, or be subjected to water, the splash of wet goods liquid, or be subjected to falling of impurity such as dust when attached, all can not destroy the due normal dielectric coefficient in clearance between moving grid electrode and the fixed grid electrode, thus can be under the most general shop condition of environment for use reliably working.

The technical scheme that realizes the utility model technical purpose is: set up one contain moving, fixed grid electrode and can with the synchronization-moving guard space of moving grid electrode; clearance between moving, the fixed grid electrode is arranged in this movably in the guard space; no matter where guard space moves to; it is topped and not contaminated that fixed grid electrode beyond the guard space all is close to its surperficial strip by one, and the due normal dielectric coefficient in clearance is caused with regard to not polluting unusually between moving, the fixed grid electrode.

The particular content of technical solutions of the utility model is: it comprises main scale and secondary chi, and secondary chi can move back and forth along main scale; Main scale comprises blade, cement on the blade and with the isometric fixed grid electrode of blade, with the wide or slightly wide rectangular strip of fixed grid electrode; Secondary chi comprise hollow the chi frame, be arranged on chi frame hollow inside supporter, be packed on the chi frame and behind main scale and secondary chi suit, be positioned at the opposite of fixed grid electrode and the moving grid electrode parallel with the fixed grid electrode, secondary chi also comprises the measurement display circuit, measure display circuit and moving grid electrode and be produced in two printed boards, realize being electrically connected with conductive rubber between two printed boards.Behind main scale and the secondary chi suit, keep a suitable clearance between fixed grid electrode and the moving grid electrode; Strip passes the inside of chi frame hollow, and its head and the tail two ends are packed in two ends of blade length direction, and keeps concordant with the head and the tail two ends of fixed grid electrode; The strip that does not pass the chi frame and be exposed to chi frame outside keeps exceptionally straight state to be adjacent to the fixed grid electrode and can dynamically rise and fall along with moving of chi frame; Be hidden in the strip of chi frame hollow inside guard space that leaves the fixed grid electrode and contain the moving grid electrode of support formation, so need to keep the clearance of normal dielectric coefficient just to be arranged in this guard space by protection by supporter.When secondary chi when main scale moves back and forth; chi frame inside also rises and falls mobile along with moving of secondary chi along main scale by strip and the formed guard space of supporter synchronously; moving of the mobile moving grid electrode just of secondary chi; and the moving grid electrode is inclusive in strip and the formed guard space of supporter; so secondary chi finally is exactly the moving of clearance that needs to keep normal dielectric coefficient in the guard space along moving of main scale; the strip that is exposed to chi frame outside then rises and falls along with moving of secondary chi; the strip that rose and fell is because length is immutable; to remain exceptionally straight state and be adjacent to the fixed grid electrode; so the fixed grid electrode just has been subjected to preventing the dynamic topped protection of long-range of extraneous contamination; all polluters all are deposited on the strip; the clearance that needs protection is inclusive under the strip, thereby it is not contaminated to have guaranteed to need to keep the clearance of normal dielectric coefficient.

The utility model has the advantages that: 1. compare with traditional volume grate electronic chi of no high protective capacities, both structurally do not have essential difference, thereby kept the distinctive power consumptive province of displacement of the lines volume grate electronic chi fully, be not afraid of magnetic, the precision height, simple in structure, volume is small and exquisite, with low cost, the technical advantage that is easy to produce, do not have the measurer enterprise of high protective capacities tradition volume grate electronic chi for consistent production, need not change technology pattern and just can change the line of production fast.2. compare with traditional volume grate electronic chi of no high protective capacities, production cost quite or only omits high, and protective capacities has but had the raising of the order of magnitude, and is practical; Compare with the electronic ruler of the work of soaking fully, production run is simple, and cost declines to a great extent.Thereby the ratio of performance to price is good, satisfies the maximum of working and use the composite request of crowd to electronic ruler under common shop condition.3. can be applicable to electronic rulers such as slide calliper rule, scale, height gauge and pit gauge, have a large capacity and a wide range, adaptability is strong.

(4) description of drawings

Fig. 1 is traditional volume grate electronic chi outside drawing

Fig. 2 is the sectional drawing of traditional volume grate electronic chi main scale

Fig. 3 is the sectional drawing of the secondary chi of traditional volume grate electronic chi

Fig. 4 is the sectional drawing behind traditional volume grate electronic chi main scale and the secondary chi suit

Fig. 5 is the one-piece construction figure of the utility model embodiment

Fig. 6 is the A-A cutaway view Amplified image of Fig. 5

Fig. 7 is the B-B cutaway view Amplified image of Fig. 5

(5) embodiment

A specific embodiment of the present utility model such as Fig. 5～shown in Figure 7.Shown in Figure 5 is the one-piece construction of present embodiment, and it comprises main scale 200 and secondary chi 300, and secondary chi 300 can move back and forth along main scale 200.As shown in Figure 6, main scale 200 comprises blade 201, cementation has the fixed grid electrode 202 isometric with blade 201 on blade 201, and be fixed with the rectangular strip 203 wide with fixed grid electrode 202, the head and the tail two ends of strip 203 are packed in two ends of blade 201 length directions and keep concordant (not shown) with the head and the tail two ends of fixed grid electrode 202, and the strip 203 after installing keeps exceptionally straight state to be adjacent to fixed grid electrode 202; Secondary chi 300 comprises chi frame 301, in the inside of chi frame 301 hollows, is provided with four columniform supporters 302, is fixed with moving grid electrode 303, also is fixed with the measurement display circuit 304 with moving grid electrode 303 separating makings on the chi frame 301.Behind main scale 200 and secondary chi 300 suits, moving grid electrode 303 is positioned at the opposite of fixed grid electrode 202 and parallel with fixed grid electrode 202, keeps a suitable clearance 401 between the two; Strip 203 passes the inside of chi frame 301 hollows; support by supporter 302; form the guard space 400 that a part is left fixed grid electrode 202 and contained moving grid electrode 303, need to keep the clearance 401 of normal dielectric coefficient to be in 400 li of guard spaces between fixed grid electrode 202 and the moving grid electrode 303.When secondary chi 300 when main scale 200 moves back and forth; polluters such as the cutting fluid of greasy dirt, sweat stain, splash, finely ground particles all are deposited on the strip 203; the clearance 401 that needs protection is inclusive under the strip 203; thereby it is not contaminated to have guaranteed to need to keep the clearance 401 of normal dielectric coefficient; noting clearance 401 and being adjacent to topped fixed grid electrode 202 by strip 203 is the back side that is placed in main scale 200 working positions, and this more helps protection.Shown in Figure 7 is moving grid electrode 303 and the electrical connection of measuring display circuit 304, keeps electric signal to be communicated with by conductive rubber 305 between them; Chi frame 301 is installed by cover plate 301-1 and trip frame 301-2 and forms to realize inner hollow.

More than carried out implementation of the present utility model by embodiment, but the utility model is not limited to above embodiment, under the prerequisite that does not surmount the utility model characteristic range, the utility model can have various differentiation.

Claims

1. a height protection volume grate electronic chi made from displacement of the lines appearance grid principle is made up of main scale and secondary chi, it is characterized in that:

Described main scale comprise blade, with the isometric fixed grid electrode of blade, with the wide or slightly wide strip of fixed grid electrode;

Described secondary chi comprise hollow the chi frame, be arranged on chi frame hollow inside supporter, be packed in the moving grid electrode on the chi frame;

Described strip passes the inside of chi frame hollow;

The head and the tail two ends of described strip are packed in two ends of blade length direction, and keep concordant with the head and the tail two ends of fixed grid electrode;

Described strip forms the space that the part is left the fixed grid electrode and contained the moving grid electrode by the support of supporter, and required clearance is arranged in this space between fixed grid electrode and the moving grid electrode;

Its part of not leaving the fixed grid electrode of described strip keeps exceptionally straight state to be adjacent to the fixed grid electrode and dynamically rises and falls with moving of chi frame.

2. high protection volume grate electronic chi according to claim 1 is characterized in that:

Described secondary chi comprises the measurement display circuit.

3. high protection volume grate electronic chi according to claim 1 is characterized in that:

Described moving grid electrode is produced in two printed boards with the measurement display circuit; Behind main scale and the secondary chi suit, described moving grid electrode is positioned at the opposite of described fixed grid electrode and parallel with described fixed grid electrode.