CN206531928U - A kind of pcb board test arm - Google Patents

Abstract

The utility model is related to pcb board test component field, there is provided a kind of pcb board test arm, including support, probe assembly and drive component, a slide rail is provided with support, the sliding block moved along slide rail is provided with slide rail, drive component driving sliding block is moved back and forth along slide rail, probe assembly is fixed on sliding block, also include debugging component in the present embodiment, control module and first sensor, component output pressure threshold value is debugged to control module, when sliding block is moved towards pcb board and is moved in the induction range of first sensor, first sensor senses slide position and exports induced signal to control module, sliding block produces different induced signals in different position first sensors, and control module then compares induced signal and threshold value, when induced signal is equal to threshold value, control module control drive component driving sliding block is moved away from pcb board, therefore the test pressure of probe assembly can be changed by debugging the different threshold values of component input.

Description

A kind of pcb board test arm

Technical field

The utility model is related to pcb board test component field, more specifically, is to be related to a kind of pcb board test arm.

Background technology

In pcb board test device, screw body driving test arm movement is surveyed to each position on pcb board Examination.Test arm includes support, lens assembly, probe assembly and drive component.Branch erects fixation connection wire rod machine simultaneously Structure, the probe that lens assembly is used on the image for obtaining pcb board, drive component driving probe assembly abuts pcb board, passes through probe Whether the marking for testing pcb board circuit is qualified.

In the test of probe and circuit board, probe needs to apply pressure contact circuit board, because probe is pointed object, It abuts not enough then influence test effect with pcb board, and probe is excessively abutted with pcb board, can easily cause PCB because pressure is excessive Plate is pierced out tiny pit, causes test to damage.Therefore, in PCB test devices of the prior art, precisely tune how is accomplished The test pressure for saving probe is one of important technical barrier.

Utility model content

The purpose of this utility model is to provide a kind of pcb board test arm, it is intended to solve in the prior art to exist because surveying The problem of test effect difference that pressure testing power is difficult to accurate control and caused and test damage.

In order to solve the above technical problems, the technical solution of the utility model is：A kind of pcb board test arm, for PCB Plate is tested, including support, the support be provided with along point to pcb board direction extension slide rail, can be along the cunning The sliding block that rail is slided and the drive component for driving the sliding block to slide, the sliding block are provided with probe assembly, in addition to For precondition and determine the probe assembly abut the pcb board produced by pressure threshold debugging component, for controlling State the control module of drive component and the first sensor for detecting the slide position in real time, the debugging component and described First sensor is each electrically connected to the control module, and the control module is electrically connected to the drive component.

Further, the drive component includes motor, transmission belt, driving wheel, driven pulley and is fixed on the transmission belt Clamping plate mechanism that is upper and being connected with the sliding block, the control module is electrically connected with the motor.

Further, the sliding block includes the first sliding part, the second sliding part and probe fixed plate, the probe fixed plate It is fixedly connected with first sliding part and the second sliding part, the probe assembly is fixed in the probe fixed plate.

Further, the test arm also includes the second sensor for being used to limit the sensing baffle position, described The moving direction of first sensor and the second sensor along the sensing baffle plate is set, and is provided with the sliding block for touching Send out first sensor described and the second sensor produces the sensing baffle plate of induced signal.

Further, the probe assembly includes probe connecting plate, probe and installed for the probe for fixing the probe Frame, the probe mounting frame is fixed on the probe connecting plate, and the probe connecting plate is fixed on the sliding block.

Further, it is provided with multiple alignment pins, the probe mounting frame and is provided with and many on the probe connecting plate The individual one-to-one positioning hole of the alignment pin.

Further, the support includes fixed plate, connecting plate and installing plate, and the slide rail and the drive component are fixed In the installing plate, the screw body of the fixed plate connection driving test arm movement, the connecting plate connects the fixation The driven pulley fixed mount for fixing the driven pulley is also set up on plate and the installing plate, the installing plate.

Further, it is additionally provided with the support for drawing the back-moving spring that the sliding block resets.

Further, protective cover and the pressure adjusting bracket for fixing the debugging component are additionally provided with the support, The pressure adjusting bracket is arranged at the inner side of the protective cover, and the protective cover is provided with the circle for being available for the debugging component to pass through Hole.

Further, the debugging component is adjusting knob or the keyboard for inputting threshold value.

The utility model beneficial effect：

The utility model is provided to be set on a kind of pcb board test arm, including support, probe assembly and drive component, support The sliding block for being provided with and being moved along slide rail on a slide rail, slide rail is equipped with, drive component driving sliding block is moved back and forth along slide rail, probe groups Part is fixed on sliding block.Also include debugging component, control module and first sensor in the present embodiment, debugging component and first pass Sensor is respectively connected on control module.Debugging component exports the threshold value of test pressure for adjusting probe assembly to controlling mould Block, when sliding block is moved towards pcb board and is moved in the induction range of first sensor, first sensor senses cunning in real time Block position and according to sliding block position output induced signal to control module, i.e. sliding block can be produced in different position first sensors Raw different induced signal, and control module then compares induced signal and threshold value, when induced signal is more than or equal to threshold value, control Module control drive component driving sliding block is moved away from pcb board, therefore can changed by debugging the different threshold values of component input Sliding block relative to first sensor extreme position, and then change probe assembly test pressure, realize the accurate of test pressure Control, test pressure when can ensure that probe is abutted with pcb board by multiple debugging before actual test is not rationally again right Pcb board causes test to damage.

Brief description of the drawings

Fig. 1 is the stereogram of test arm in the embodiment that the utility model is provided；

Fig. 2 is the solid for removing protective cover and sensor shield of test arm in the embodiment that the utility model is provided Figure；

Fig. 3 is the stereogram of another angle of test arm in the embodiment that the utility model is provided；

Fig. 4 is the exploded view of test arm in the embodiment that the utility model is provided；

Fig. 5 is the assembling schematic diagram of slide rail, sliding block and drive component in the embodiment that the utility model is provided；

Fig. 6 is the exploded view of drive component in the embodiment that the utility model is provided；

Fig. 7 is mounting plates structure schematic diagram in the embodiment that the utility model is provided；

Fig. 8 is the enlarged drawing of regional area in Fig. 4；

Fig. 9 is the confined state schematic diagram of the embodiment second sensor that the utility model is provided and sensor mount.

Accompanying drawing indicates explanation

Support -- 100, installing plate -- 110, is transversely mounted portion -- 111, longitudinally mounted portion -- 112, driven pulley mounting bracket -- 120, chute -- 1121, sensor mount -- 130, sensor shield -- 140, sensor installing plate -- 131, threaded connection Post -- 132, fixed plate -- 150, connecting plate -- 160, back-moving spring frame -- 170, supporting part -- 1122, circular hole -1123, protection Cover 180；

Lens assembly -200, CCD camera -210, CCD camera lens -- 220, light source -- 230, lens fixing base -240；

Probe assembly -- 300, probe connecting plate -- 310, probe -- 320, probe mounting frame -- 330, alignment pin -- 311, Fastening screw -312, positioning hole -331；

Drive component -400, motor -- 410, transmission belt -- 420, driving wheel -- 430, driven pulley -- 440, clamping plate machine Structure -450, first clamping plate -- 451, second clamping plate -- 452, linkage board -453, groove -4511, anti-slop serrations 4521；

Slide rail -500；

Sliding block -600, the first sliding part -- 610, the second sliding part -- 620, probe fixed plate -630 sense baffle plate -- 640, back-moving spring -650；

Debug component -800, pressure adjusting bracket -810；

First sensor -901, second sensor -- 902.

Embodiment

In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only to explain The utility model, is not used to limit the utility model.

It should be noted that when element is referred to as " being fixed on " or " being arranged at " another element, it can be directly another On one element or it is connected on another element.When an element is known as " being connected to " another element, it can To be directly to another element or be indirectly connected on another element.

It should also be noted that, the orientation term such as left and right, upper and lower in the present embodiment, be only each other relative concept or Using the normal operating condition of product as reference, and it should not be regarded as restrictive.

If having used the word such as " first ", " second " in the present embodiment come if limiting parts, people in the art Member should know：" first ", the use of " second " are intended merely to facilitate in description and parts distinguished as not having separately Statement is outer, and above-mentioned word does not have special implication.

In addition, being used for applied in any technical scheme disclosed in above-mentioned the present embodiment represents position relationship or shape Its implication includes approximate with its, similar or close state or shape to term unless otherwise stated.The utility model embodiment is carried Any part supplied can be assembled by multiple single parts, or integrally formed technique is manufactured Separate part.

Generally test arm is driven to do horizontal and vertical movement by screw body in PBC board tests, test arm is then Driving probe assembly does the fast reciprocating movement in vertical pcb board direction, and the one-shot measurement action of probe includes the shifting for pointing to pcb board Move and away from the movement of pcb board, each test of probe is both needed to abut pcb board with certain test pressure.

As shown in Fig. 1 Fig. 2 and Fig. 3, a kind of pcb board test arm, including support 100, camera lens are provided in the present embodiment It is provided with a slide rail 500 on component 200, probe assembly 300 and drive component 400, support 100, slide rail 500 is along pointing to pcb board Direction extends, and the sliding block 600 moved along slide rail 500 is provided with slide rail 500, and drive component 400 drives sliding block 600 along slide rail 500 are moved back and forth, and probe assembly 300 is fixed on sliding block 600.Also include debugging component 800, control module in the present embodiment (not indicated in figure) and first sensor 901, debugging component 800 is used to preconditioning and determining that probe assembly 300 abuts pcb board institute The threshold value of the test pressure of generation, debugging component 800 and first sensor 901 are each electrically connected to control module, control module It is electrically connected to drive component 400.Debugging component 800 output one be used for adjust probe assembly 300 test pressure threshold value to control Molding block, when sliding block 600 is moved towards pcb board and is moved in the induction range of first sensor 901, first sensor 901 sense the position of sliding block 600 and the position according to sliding block 600 in real time exports induced signal to control module, and sliding block 600 is in difference Position first sensor 901 can produce different induced signals, and control module then compares induced signal and threshold value, works as sensing When signal is equal to threshold value, the control module control driving sliding block 600 of drive component 400 is moved away from pcb board, therefore passes through debugging group Part 800, which inputs different threshold values, can change position of the sliding block 600 relative to first sensor 901, and then change probe assembly 300 test pressure, realizes the accurate control of test pressure, it is ensured that test pressure when probe is abutted with pcb board is rationally again not Test is caused to damage to pcb board.

Further, as shown in Fig. 4, Fig. 6, drive component 400 include motor 410, transmission belt 420, driving wheel 430, from Driving wheel 440 and clamping plate mechanism 450, motor 410, which is fixed on the output shaft of the rear end of support 100 and motor 410, is provided with a master Driving wheel 430, driven pulley 440 is fixed on the front end of support 100, and driving wheel 430 and driven pulley 440 are driven by transmission belt 420 to be connected Connect, clamping plate mechanism 450 is fixed on transmission belt 420 and is connected with sliding block 600, and control module is electrically connected with motor 410, control electricity The startup of machine 410, stop, rotating and reverse.More specifically, clamping plate mechanism 450 includes first clamping plate 451, the and of second clamping plate 452 Linkage board 453, first clamping plate 451 and second clamping plate 452 from sandwich transmission belt 420 wherein on one side, wherein first clamping plate 451 It is provided with the groove 4511 for being available for placing transmission belt 420.During installation, one side of transmission belt 420 is placed in groove 4511, then One clamping plate 451 and second clamping plate 452 put one side of fastening clamp transmission belt 420.Transmission belt 420 is timing belt in the present embodiment, The one side abutted with transmission belt 420 of second clamping plate 452 is provided with for anti-slop serrations 4521, the anti-slop serrations 4521 insertion groove Dentalation in 4511 with the inner circumferential of transmission belt 420 matches, and can effectively prevent transmission belt 420 relative to clamping plate mechanism 450 Slide.The length of first clamping plate 451 is more than the width of transmission belt 420, and the two ends of first clamping plate 451 exceed the part of transmission belt 420 It is fastenedly connected with second clamping plate 452, can so avoids fastener from passing through transmission belt 420, it is ensured that the performance of transmission belt 420 is complete. Wherein, the two ends difference connection sliding block 600 and second clamping plate 452 of linkage board 453.In the present embodiment, front end refers to close to pcb board One end, rear end refers to one end away from pcb board.In the present embodiment, drive component can also use other structures, such as straight line Motor, motor driving Worm Wheel System etc..

Further, as shown in Figure 4, Figure 5, sliding block 600 is solid including the first sliding part 610, the second sliding part 620 and probe Fixed board 630, the both ends of probe fixed plate 630 are fixedly connected with the first sliding part 610 and the second sliding part 620 respectively, are passed through First sliding part 610 and the second sliding part 620 be set, the stability that increase sliding block 600 is moved, by probe fixed plate 630 First sliding part 610 and the second sliding part 620 are linked together, in addition, probe assembly 300 is fixed in probe fixed plate 630. Wherein the first sliding part 610 is located on slide rail 500 at the one of pcb board, and the second sliding part 620 is located at remote on slide rail 500 Pcb board it is another go out.The sensing baffle plate 640 for triggering the sensing of first sensor 901, this implementation are additionally provided with sliding block 600 In example, first sensor 901 senses the position of sliding block 600, and actual is to sense sliding block 600 indirectly by sensing baffle plate 640 Position, specifically senses baffle plate 640 and is connected in probe fixed plate 630, other embodiment, sensing baffle plate 640 can also be connected In the first sliding part 610 or the second sliding part 620.

Further, as shown in figure 8, probe assembly 300 includes probe connecting plate 310, probe 320 and for fixing probe 320 probe mounting frame 330, probe mounting frame 330 is fixed on probe connecting plate 310, and probe connecting plate 310 is fixed on sliding block 600.Specifically, probe connecting plate 310 is fixed in probe fixed plate 630.

Specifically, be provided with probe connecting plate 310 in multiple alignment pins 311, probe mounting frame 330 be provided with it is how fixed The position one-to-one positioning hole 331 of pin 311, in the present embodiment, multiple alignment pins 311 refer specifically to two and two or more quantity Alignment pin 311, such as sets the alignment pin 311 of two, three, four, five, six, seven or more than eight quantity, probe Mounting bracket 330 is positioned with probe connecting plate 310 by multiple alignment pins 311；In addition, probe connecting plate 310 is provided with a spiral shell Pit (is not indicated) in figure, and fastening screw 312 is correspondingly arranged in screwed hole, and probe mounting frame 330 passes through the fastening screw 312 It is fixed on probe connecting plate 310；Probe connecting plate 310 is provided with two screwed holes, and interior set of each screwed hole is arranged in correspondence with There is fastening screw 312, probe mounting frame 330 is fixed on probe connecting plate 310 by two fastening screws 312.Normal conditions test Needle assemblies 300 are fixed using four even more screws mostly, therefore replacing probe needs to take a long time, and then image Production efficiency.And lead in the present embodiment between probe mounting frame 330 and probe connecting plate 310 and positioned by multiple alignment pins 311 Position relationship each other, the effect of such fastening screw 312 is only probe mounting frame 330 is close to probe connecting plate 310, the carrying effect of fastening screw 312 is small, can greatly reduce the quantity of fastening screw 312, therefore can in the present embodiment Only to set one or two fastening screws 312.Being located by connecting for alignment pin 311 can be by directly pressing probe mounting frame 330 with probe connecting plate 310 and realizes, locating speed block, and fastening screw 312 is few, and probe mounting frame 330 is anchored on probe and connected The speed of fishplate bar 310 is fast, easily realizes that the fast assembling-disassembling of probe mounting frame 330 is changed.The present embodiment middle probe connecting plate 310 One end sets multiple alignment pins 311 of longitudinal arrangement, and the alignment pin 311 of longitudinal arrangement is specifically provided with three, probe connecting plate 310 other end is provided with transversely arranged multiple alignment pins 311, is specifically provided with the transversely arranged multiple alignment pins of two row 311, wherein being again provided with transversely arranged 311 each column of alignment pin two, probe mounting frame 330 identical with alignment pin 311 The positioning hole 331 of arrangement.

Further, test arm also includes the second sensor 902 for being used to limit sensing baffle plate 640 position, and first passes The moving direction of sensor 901 and second sensor 902 along sensing baffle plate 640 is set.One end of sensing baffle plate 640 is connected to probe Fixed plate 630, the other end of sensing baffle plate 640 is extended between first sensor 901 and second sensor 902, senses baffle plate 640 other end is moved back and forth between second sensor 902 with the movement of sliding block 600 between first sensor 901, and first Sensor 901 and second sensor 902 are respectively from the moving section of one in front and one in back limitation sensing baffle plate 640.In the present embodiment, the One sensor 901 and second sensor 902 are photoelectric sensor, when probe fixed plate 630 move towards pcb board, and sensing is kept off Plate 640 is moved to first sensor 901 with sliding block 600, and the other end of sensing baffle plate 640 enters the sensing of first sensor 901 During scope, when sensing baffle plate 640 is in different positions, shaded effect is different, and correspondence sensing baffle plate 640 is in induction range Diverse location first sensor 901 produces induced signal, with this accurate position for perceiving sensing baffle plate 640, and then accurately perceives The position of probe 320.Second sensor 902 is a limit sensors, deviates from pcb board for being limited when being moved away from pcb board The position of shifting, sensing baffle plate 640 triggers second sensor 902 when being moved away from pcb board and produces induced signal, and control module connects Controlled motor 410 after the induced signal of second sensor 902 is received to rotate backward, or control module control electricity when being completed Machine 410 stops operating.

Further, as shown in fig. 7, support 100 includes being used for fixed rack 500, drive component 400 and lens assembly 200 installing plate 110, installing plate 110 is provided with the portion of being transversely mounted 111 and longitudinally mounted portion 112, is transversely mounted portion 111 and sets One side in longitudinally mounted portion 112, slide rail 500 is fixed on the one side in longitudinally mounted portion 112, and sliding block 600 is slideably positioned in On slide rail 500.Drive component 400 is arranged at the lower section of sliding block 600, specifically, and motor 410 is fixed on the portion of being transversely mounted vertically 111 rear end, the output shaft of motor 410 is arranged at output the tip of the axis, longitudinal direction peace through portion 111, driving wheel 430 is transversely mounted The front end in dress portion 112 is provided with a driven pulley mounting bracket 120, and driven pulley 440 is installed on driven pulley mounting bracket 120.Lens group Part 200 is arranged at the top in longitudinally mounted portion 112, specifically, and lens assembly 200 includes CCD camera, camera lens and light source, camera lens Towards pcb board, light source is arranged at the front end of camera lens.

Further, longitudinally mounted portion 112 is provided with a chute 1121, and driven pulley mounting bracket 120 is slidably set In in chute 1121, the bottom of chute 1121 is provided with an elongated hole, and the centerline parallel of the center line and chute 1121 of elongated hole is set Put, a screw is set in elongated hole, driven pulley mounting bracket 120 is fixed in chute 1121 by the screw.Limited by chute 1121 The installation direction of driven pulley mounting bracket 120 processed, the position of driven pulley mounting bracket 120 is adjusted by the cooperation of elongated hole and screw, with This realizes the position adjustments of driven pulley mounting bracket 120.

Further, first sensor 901 and second sensor 902 are adjustable respectively is fixed on the portion of being transversely mounted 111 Front end.Specifically, the front end for being transversely mounted portion 111 is provided with void region, while being transversely mounted the bottom of the front end in portion 111 Two sensor mounts 130 are provided with, moving direction of two sensor mounts 130 along sensing baffle plate 640 is set, two Sensor mount 130 is respectively arranged in two sensings across void region, first sensor 901 and second sensor 902 respectively On device mounting bracket 130.Sense the upper end connection sliding block 600 of baffle plate 640, the other end of sensing baffle plate 640 passes through void region position Between first sensor 901 and second sensor 902.The bottom for being transversely mounted the front end in portion 111 is additionally provided with for protecting The sensor shield 140 of first sensor 901 and second sensor 902.

Further, as shown in figure 9, sensor mount 130 includes sensor installing plate 131 and be respectively arranged to engrave Two threaded connection posts 132 of dummy section both sides, the bottom in the portion of being transversely mounted 111, each spiral shell are fixed in each threaded connection post 132 one end The other end of line connecting pole 132 connection sensor installing plate 131, first sensor 901 and second sensor 902 are respectively arranged in two On sensor installing plate 131.It is provided with sensor installing plate 131 and one-to-one two elongated hole of post 132, spiral shell is threadedly coupled with two Line connecting pole 132 is fixedly connected by the elongated hole with sensor installing plate 131, is coordinated by two elongated holes and threaded connection post 132 The position of each sensor installing plate 131, and then regulation first sensor 901 and second sensor 902 respectively can quickly be adjusted Position.

A more step, support 100 also includes fixed plate 150 and connecting plate 160, the connection driving test arm of fixed plate 150 Mobile screw body, connecting plate 160 is connected plate 150 and installing plate 110, specifically, the opposite side in longitudinally mounted portion 112 Face is connected with connecting plate 160.

Further, the back-moving spring 650 for drawing the reset of sliding block 600 is additionally provided with installing plate 110, specifically, Back-moving spring 650 is arranged at the rear end in longitudinally mounted portion 112.The present embodiment is the length back-moving spring of increase back-moving spring 650 Frame 170, back-moving spring frame 170 is fixed on the rear end of installing plate 110 and extended back, and one end connection of back-moving spring 650 should The rear end of back-moving spring frame 170, the other end linking probe fixed plate 630 or the second sliding part 620 of back-moving spring 650.More Further, the first side of the rear end in longitudinally mounted portion 112 is provided with for preventing the sagging supporting part of back-moving spring 650 1122, supporting part 1122 sets and is available for the circular hole 1123 that back-moving spring 650 is passed through.

Further, protective cover 180 and pressure adjusting bracket 810 are additionally provided with support 100, pressure adjusting bracket 810 is used for Fixed debugging component 800, specifically, protective cover 180 is arranged at the rear end of installing plate 110, for protecting the rear end of installing plate 110, Pressure adjusting bracket 810 is arranged at the inner side of protective cover 180, and protective cover 180, which is provided with, to be available for debugging the circular hole that component 800 is passed through. In the present embodiment, debugging component 800 is adjusting knob or the keyboard for inputting threshold value.

Further, in the present embodiment, lens assembly 200 includes CCD camera 210, CCD camera lenses 220, light source 230 and mirror Head fixed seat 240, CCD camera 210 is fixed on lens fixing base 240, and CCD camera lenses 220 are arranged in CCD camera 210, light source 230 are arranged on CCD camera lenses 220, and lens fixing base 240 is installed on the top in longitudinally mounted portion 112.

Preferred embodiment of the present utility model is these are only, it is all in this practicality not to limit the utility model Any modifications, equivalent substitutions and improvements made within new spirit and principle etc., should be included in guarantor of the present utility model Within the scope of shield.

Claims (10)

1. a kind of pcb board test arm, for testing pcb board, including support, the support is provided with described along pointing to The slide rail of pcb board direction extension, the sliding block that can be slided along the slide rail and the driving group for driving the sliding block to slide Part, the sliding block is provided with probe assembly, it is characterised in that：Also include being used to preconditioning and determining that the probe assembly abuts institute The debugging component of pressure threshold produced by stating pcb board, the control module for controlling the drive component and for detecting in real time The first sensor of the slide position, the debugging component and the first sensor are each electrically connected to the control mould Block, the control module is electrically connected to the drive component.

2. pcb board test arm according to claim 1, it is characterised in that：The drive component includes motor, transmission Band, driving wheel, driven pulley and the clamping plate mechanism for being fixed on the transmission belt and being connected with the sliding block, the control module with The motor electrical connection.

3. pcb board test arm according to claim 2, it is characterised in that：The sliding block includes the first sliding part, second Sliding part and probe fixed plate, the probe fixed plate are fixedly connected with first sliding part and the second sliding part, described to visit Needle assemblies are fixed in the probe fixed plate.

4. pcb board test arm according to claim 3, it is characterised in that：The test arm also includes sensing baffle plate With the second sensor for limiting the sensing baffle position, the sensing baffle plate is on the sliding block for triggering institute State first sensor and the second sensor produces induced signal, the first sensor and the second sensor are described in The moving direction for sensing baffle plate is set.

5. pcb board test arm according to claim 1, it is characterised in that：The probe assembly include probe connecting plate, Probe and the probe mounting frame for fixing the probe, the probe mounting frame is fixed on the probe connecting plate, described Probe connecting plate is fixed on the sliding block.

6. pcb board test arm according to claim 5, it is characterised in that：It is provided with the probe connecting plate multiple It is provided with alignment pin, the probe mounting frame and multiple one-to-one positioning holes of alignment pin.

7. according to any described pcb board test arm of claim 2 to 4, it is characterised in that：The support include fixed plate, Connecting plate and installing plate, the slide rail and the drive component are fixed on the installing plate, the fixed plate connection driving test The screw body of arm movement, the connecting plate connects and also sets up use on the fixed plate and the installing plate, the installing plate In the driven pulley fixed mount of the fixed driven pulley.

8. according to any described pcb board test arm of claim 1 to 6, it is characterised in that：Use is additionally provided with the support In the back-moving spring for drawing the sliding block reset.

9. according to any described pcb board test arm of claim 1 to 6, it is characterised in that：It is additionally provided with the support anti- Shield and the pressure adjusting bracket for fixing the debugging component, the pressure adjusting bracket are arranged at the inner side of the protective cover, The protective cover is provided with the circular hole for being available for the debugging component to pass through.

10. according to any described pcb board test arm of claim 1 to 6, it is characterised in that：The debugging component is regulation Knob or the keyboard for inputting threshold value.