KR20060125067A - Specification measurement apparatus of wiper arm - Google Patents

Abstract

An apparatus for measuring the specification of a wiper arm is provided to easily and exactly measure a twisted angle and a y-axis side length of a protection box, a downward length of the wiper arm, and a total length of an x-axis. In an apparatus for measuring the specification a wiper arm, a box fixing jig(120) is installed at a center of a base frame(110) and fixes a protection box. A first LM guide(130) is vertically fixed in an x-axis at a front end of the box fixing jig. A second LM guide(140) is fixed at a top surface of a first LM block of the first LM guide. A first measuring jig(150) measures a twisted angle of the protection box and a y-axis side length. And, a second measuring jig(160) measures a downward length of the wiper arm and the y-axis side length.

Description

Specification measurement apparatus of wiper arm

1 is an explanatory diagram showing a general wiper;

2 and 3 is a bottom and side cross-sectional view showing the configuration of a general wiper,

4A and 4B are explanatory diagrams for explaining the specifications of the wiper arm;

5 is a perspective view showing the configuration of the wiper arm specification measuring apparatus according to the present invention, FIG. 6 is a side view showing the configuration of a box fixing jig of the wiper arm specification measuring apparatus according to the present invention;

7 is an exploded perspective view showing the configuration of the first measurement jig of the wiper arm specification measuring device according to the present invention;

8 is a rear view showing the configuration of the rolling block of FIG.

9 is an exploded perspective view showing the configuration of a second measuring jig of the wiper arm specification measuring device according to the present invention;

10 is a commercial state diagram showing a state of use of the wiper arm specification measuring apparatus according to the present invention.

<Explanation of symbols on main parts of the drawings>

12: protection box 14: retainer

14: armpiece 15: wiper arm

100: specification measuring device 110: base frame

120: Vox fixing jig 130, 140: 1, 2 LM Guide

150, 160: 1st, 2nd measuring jig

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for measuring wiper arm specifications, and more particularly, to an apparatus for measuring wiper arm specifications in which a wiper arm specification can be easily measured.

The wiper 10 for securing the front view at the time of rainfall or snowfall is mounted in a pair at the lower end of the windshield 11 of the vehicle as shown in FIG. 1, and the wiper is divided into a vacuum type and an electric type according to the operating power. .

First, the vacuum type is used as pumping power by using the vacuum (negative pressure) generated in the intake stroke of the engine.The vacuum is changed in the operating state of the engine and causes an unbalance in power, which is rarely used at present. It uses the power of the motor by the battery, and has the capability to fully cope with the conditions of rainfall and snowfall. Currently, almost all cars select electric, and the electric drive type wiper 10 is shown in FIG. Similarly, a wiper arm 15 composed of a protection box 12, a retainer 13, and an arm piece 14 engaged with a link necessary for operation of the wiper is formed of a link unit and a motor unit.

At the tip of the arm piece 14 of the wiper arm 15, a wiper arm 15 is angularly moved by an operation of a link by a motor through a blade of rubber material (not shown) to clean the windshield 11 of the vehicle. do.

The wiper arm 15 is provided with a uniform and continuous elastic force between the protection box 12 and the arm piece 14 via a spring 16 to maintain surface contact with the vehicle windshield 11. It is composed.

To this end, an arm piece 14 having a plurality of bent portions by pressing a metal plate is inserted into the front end of the retainer 13, and the inserted arm piece 14 inserts both side portions a of the front end of the retainer 13. Bend and fix it first.

As described above, the arm piece 14 fixed to the retainer 13 fixes one side of the spring 16 by using an assembly hole 17 formed at the tip, and the other side of the spring 16 is provided with a protection box 12. It is fixed to the pin 18 to fasten the retainer 13 so that an elastic force acts on the wiper arm assembly 15.

At the front end of the arm piece 14 on which the spring 16 is mounted, the rivet 18 is secondarily used to prevent the flow and noise of the arm piece 14 during the angular movement of the wiper arm assembly 15. Fix it.

On the other hand, such a wiper arm has been developed a number of jig for measuring the torsion angle, pressing pressure, rotation angle, friction coefficient, etc., such as domestic patent application 1999-66293 (torsion angle measuring device of automotive wiper arm).

However, these fixtures were developed to simply test the performance of the wiper arm, and the basic specifications of the wiper arm as shown in FIGS. 4A and 4B (torsion angle and Y-axis lateral length of the protection box, downward distance of the wiper arm, Since a separate device for measuring the Y-axis lateral length and the X-axis full length is not developed, it is impossible to accurately measure the basic specifications of the actual wiper arm, and it is impossible to check the occurrence of product defects due to the failure to measure the specifications. have.

The present invention is to solve the above problems, the specification of the wiper arm in the state of fixing the wiper arm (torsion angle and Y-axis lateral length of the protection box, the downward distance of the wiper arm, Y-axis lateral length and X-axis full length It is an object of the present invention to provide a wiper arm specification measuring device that can easily and accurately measure).

Features of the present invention for achieving the above object,

A measuring apparatus for measuring a specification of a wiper arm comprising a protection box, a retainer and an armpiece, comprising: a base frame; A box fixing jig installed at one end of an upper surface of the base frame to fix the protection box; A first LM guide vertically fixed in the X-axis direction at the front end of the box fixing jig so that the first LM block is slidably moved in the X-axis according to the rotation of the first ball screw with the handle; A second LM guide fixed to an upper surface of the first LM block of the first LM guide such that the second LM block is slidably moved in the Y axis according to the rotation of the second ball screw with the handle; A first measuring jig fixed to both sides of the first LM guide to measure the torsion angle and the Y axis lateral length of the protection box while being lifted and lowered on the Y-axis while the retainer is seated; And fixed to the upper surface of the second LM block of the second LM guide, while measuring the downward distance and the Y-axis side length of the wiper arm while sliding in the lifting and Y-axis while the armpiece of the wiper arm is coupled And a second measuring jig.

Here, the side of the first LM guide is further attached to the X-axis full-length measurement ruler for measuring the X-axis full length of the wiper arm.

Here, the second LM block of the second LM guide can be read vertically attached to the indicator plate on the inner surface thereof to read the ruler for measuring the X-axis electric field.

Here, the box fixing jig is formed in a rectangular bar shape, the first guide grooves are formed in the longitudinal direction on both sides and the front surface, the body having a fixing plate on the bottom; A first fixing plate coupled to and fixed by the bolt to the first guide groove at an upper portion of the body; A fixing lever fixed to the front surface of the first fixing plate to move the shaft up and down; A fixing block formed at the shaft end of the fixing lever to fix the protection box; A second fixing plate coupled to and fixed by the bolt to the first guide groove at the bottom of the body; And a fixing member having a fixing pin fixed to an upper surface of the second fixing plate to which the protection box is inserted.

Here, the fixing pin is formed to be detachable from the fixing member.

Here, the second LM guide further has a first Y-axis lateral measurement ruler capable of measuring the Y-axis lateral length of the wiper arm, and the first Y-axis lateral measurement ruler is the first LM guide. 2 Scales are formed on both sides of the center of the LM Guide.

Here, the first measuring jig is coupled to the support wall, the first base plate is formed with a pair of first guide rail on the upper surface; A second Y-axis lateral measurement ruler attached to a side of the first base plate to measure a Y-axis lateral length of the protection box; A first guide block coupled to the first guide rail is formed at a bottom thereof to slide on the Y axis by the first screw handle on the first guide rail, and a third ball screw vertically coupled to the second screw handle is vertically formed. A lower block having a second guide rail vertically formed on one side of the upper surface, and having an instruction block reading a scale of the second Y-axis lateral measurement ruler on a side thereof; And a second guide block coupled to the second guide rail at a side thereof, and being lifted up and down from the second guide rail by a second screw handle of the third ball screw, and formed by a third screw handle formed at a side thereof. And an upper block sliding the sliding block in the X-axis direction along the second guide groove formed therein.

Here, the sliding block has a third guide groove which is engaged with the second guide groove on the side, a semi-cylindrical seating groove is formed on the upper surface, the main block to which the fixing screw is fastened on both sides; The bottom surface is formed in a shape corresponding to the seating groove to be seated in the seating groove of the main block to be rolled left and right, the V groove is formed in the longitudinal direction on the upper surface, the angle is displayed on one side, the fixing screw It consists of a rolling block that can be fixed by, and the retainer is seated in the V-groove of the rolling block, the angle of the rolling block is checked by measuring the torsion angle of the protection box in a state where the retainer is leveled.

Here, the second measuring jig is fixed to the upper surface of the second LM block, the second base plate on which the downward distance measuring ruler for measuring the downward distance of the wiper arm is fixed vertically; A support block which is bent with a needle thread and is fastened to an inner side and a side of the second base plate, and is attached with a third guide rail perpendicularly to an upper end of the upper end, and a stopper provided at the upper center; An insertion groove into which a fourth screw handle is inserted, and a fourth ball screw is penetrated in the state where the fourth screw handle is inserted into the insertion groove and fastened to the support block while being engaged with the fourth screw handle; A elevating block having a fourth guide groove coupled to the third guide rail on a side thereof and installed to be in contact with a side of the down distance measuring ruler; And a coupling pin block fixed on the upper surface of the elevating block to be rotatable by a rotation shaft, and a coupling pin on the same line as the rotation shaft is coupled to the arm piece.

Here, the downward distance measuring ruler is formed on both sides from the upper surface of the lifting block.

Hereinafter, with reference to the accompanying drawings, the configuration of the wiper arm specification measuring apparatus according to the present invention will be described in detail.

FIG. 5 is a perspective view showing the configuration of the wiper arm specification measuring apparatus according to the present invention, FIG. 6 is a side view showing the configuration of the box fixing jig of the wiper arm specification measuring apparatus according to the present invention, and FIG. An exploded perspective view showing the configuration of the first measurement jig of the wiper arm specification measuring apparatus according to the present invention, FIG. 8 is a rear view showing the configuration of the rolling block of FIG. 7, and FIG. It is an exploded perspective view which shows the structure of a 2nd measuring jig.

5 to 9, the wiper arm specification measuring apparatus 100 according to the present invention includes a base frame 110, a box fixing jig 120, a first LM guide 130, and a second It consists of an LM guide 140, the 1st measuring jig 150, and the 2nd measuring jig 160.

First, the base frame 110 is formed in a table shape.

Then, the box fixing jig 120 has a body 121, a first fixing plate 122, a fixing lever 123, a fixing block 124, and a second fixing plate 125 as shown in FIG. 6. And a fixing member 126.

Body 121 is formed in a rectangular bar shape, a pair of first guide grooves (121-1) are formed on both sides and the front in the longitudinal direction, respectively, the fixing plate is fastened by the base frame 110 and the bolt on the bottom ( 121-2).

The first fixing plate 122 is bent in the form of a recess and is coupled to and fixed by a bolt to the first guide groove 121-1 at the upper front of the body 121.

The fixing lever 123 has a shaft 123-1 which is moved up and down, and is fixed to the front surface of the first fixing plate 121-2.

The fixing block 124 is formed at the end of the shaft 123-1 of the fixing lever 123 to fix the protection box 12. Here, a fixing pin groove (not shown) is formed at the bottom of the fixing block 124 to which the fixing pin 126-1 to be described below is inserted.

The second fixing plate 125 is bent in the form of a needle-shaped, the support wall (125-1) is formed in the form formed integrally on the side, the first guide groove (121-1) in the lower front of the body 121 It is joined and fixed by bolts.

The fixing member 126 is fixed to the upper surface of the second fixing plate 125 to form a fixing pin 126-1 into which the protection box 12 is inserted. Here, the fixing pin 126-1 is formed to be detachable from the fixing member 126.

In addition, the first LM guide 130 is the front end of the vox fixing jig 120 so that the first LM block 133 is slidably moved in the X axis according to the rotation of the first ball screw 132 having a handle 131. In the X-axis direction is fixed vertically. Here, the side of the first LM guide 130 is further attached to the X-axis full-length measurement ruler 134 that can measure the X-axis full length of the wiper arm (15).

On the other hand, the second LM guide 140 of the first LM guide 130 so that the second LM block 143 is slid along the Y axis in accordance with the rotation of the second ball screw 142 having a handle 141. It is fixed to the upper surface of the first LM block 133. Here, the second LM guide 140 is further attached to the first Y-axis lateral measurement ruler 144 that can measure the Y-axis lateral length of the wiper arm 15, the first Y-axis side The measuring ruler 144 is formed on both sides of the scale from the center of the second LM guide 140, respectively. Here, the second LM block 143 of the second LM guide 140 may read the X-axis full-length measurement ruler 134 by vertically attaching the indicator plate 145 on its inner surface.

As shown in FIG. 7, the first measuring jig 150 includes a first base plate 151, a second Y-axis lateral measurement ruler 152, a lower block 153, and an upper block ( 154).

The first base plate 151 is horizontally coupled to the support wall 101 by bolts, and a pair of first guide rails 151-1 are formed on the upper surface in the Y-axis direction.

The second Y-axis lateral measurement ruler 152 is attached to the side of the first base plate 151 so as to measure the Y-axis lateral length of the protection box 12.

The lower block 153 has a first guide block 153-1 coupled to the first guide rail 151-1 at the bottom thereof, so that the first screw handle 153-2 is formed on the first guide rail 151-1. The third ball screw 153-4, which is slid along the Y axis by the second screw handle 153-3 on the upper surface, is vertically fixed, and the second guide rail 153-5 on the upper surface on one side thereof. It is formed vertically, and the instruction block 153-6 which reads the scale of the 2nd Y-axis lateral measurement ruler 152 is attached to the side surface.

The second block handle 153-3 of the third ball screw 153-4 is formed by forming a second guide block 154-1 coupled to the second guide rail 153-5 on the side of the upper block 154. The second guide groove 154, which is lifted up and down from the guide rail 153-5, and the sliding block 154-4 is formed in itself by the third screw handle 154-2 formed on the side thereof. Slide in the X-axis direction along -3).

The sliding block 154-4 has a third guide groove 154-31 engaged with the second guide groove 154-3 on the side thereof, and a semi-cylindrical seating groove 154-32 on the upper surface thereof. The bottom surface is seated in the main block 154-34 to which the fixing screws 154-33 are fastened to both sides, and the bottom surface of the main block 154-34 to be rolled from side to side. It is formed in a shape corresponding to the -32, the V groove (154-35) is formed in the longitudinal direction on the upper surface and consists of a rolling block (154-36) that can be fixed by a fixing screw (154-33), rolling block The retainer 13 is seated in the V-groove 154-35 of (154-36), and the angle is displayed on one side so that the rolling block (154-36) is rolled with the retainer 13 level. Check the torsion angle of the protection box 12 is measured. Here, the lubricating oil is applied to the mounting grooves (154-32).

In addition, the second measuring jig 160 includes a second base plate 161, a support block 162, a lifting block 163, and a coupling pin block 164 as shown in FIG. 9. do.

The second base plate 161 is fixed to the upper surface of the second LM block 143 by a bolt, and the downward distance measuring ruler 161-1 capable of measuring the downward distance of the wiper arm 15 is provided on the upper surface of the second base plate 161. It is fixed vertically. Here, the down distance measuring ruler 161-1 is formed on both sides of the starting surface of the lifting block 163, which will be described later, on both sides.

The support block 162 is bent with a needle thread and fastened to the second base plate 161 on the side, and the third guide rail 162-1 is attached to the upper surface side, and the lifting block 163 is attached to the upper surface. A bar-shaped stopper 162-2 for blocking the lowering is provided.

The elevating block 163 has an insertion groove 163-2 into which the fourth screw handle 163-1 is inserted, and a fourth screw handle 163-1 is inserted into the insertion groove 163-2. The fourth ball screw (163-3) in the state is coupled to the support block 162 in a state of being engaged with the fourth screw handle (163-1), coupled to the third guide rail (162-1) on the side The fourth guide groove 163-4 is formed, and is installed to interview the side surface of the downward distance measuring ruler 161-1.

The coupling pin block 164 is bent with a needle thread, the rotation shaft 164-1 is formed on the bottom surface, the coupling pin 164-is coupled to the arm piece 14 in the same line as the rotation shaft 164-1 to the side inner side. 2) is formed.

Hereinafter, the operation of the wiper arm specification measuring apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

10 is a commercial state diagram showing a state of use of the wiper arm specification measuring apparatus according to the present invention.

First, the measurer protects the protection box against the fixing pin 126-1 of the fixing member 126 of the box fixing jig 120 while the first measuring jig 150 and the second measuring jig 160 are positioned at the reference position. Insert the hole of (12), the fixing lever 123 is pulled down, the fixing block 124 is lowered to be combined with the fixing pins (126-1) so that the protection box 12 is fixed.

In this state, the measurer rotates the first screw handle 153-2 of the first measuring jig 150 according to the degree of bending of the protection box 12 of the wiper arm 15 to lower the block 153 and the upper block. 154 is moved along the first guide rail 151-1 along the X axis so that the retainer 13 is centered on the V-groove 154-35 of the rolling block 154-36.

In addition, the measurer uses the handles 131 and 141 to slide the first LM block 133 of the first LM guide 130 and the second LM block 143 of the second LM guide 140, that is, the second LM block 143. The arm piece 14 is fastened to the coupling pin 164-2 formed on the coupling pin block 164 of the second measurement jig 160 by sliding the second measurement jig 160 coupled to the LM block 143. .

Then, the measurer attaches a protractor (not shown) to the retainer 13, rotates the second screw handle 153-3 of the first measuring jig 150, and rotates the third ball screw 153-4. By adjusting the height of the upper block 154 by rotating the fourth screw handle 163-1 of the second measuring jig 160 to adjust the height of the elevating block 163 to adjust the height of the retainer 13 Level it up. At this time, the measurer rotates the third screw handle 154-2 along the length of the protection box 12 to adjust the sliding block 154-4 in the X-axis direction to retain the retainer 13 in the rolling block 154-36. ) Only to be seated.

When the retainer 13 is level, the measurer measures the angle at which the rolling blocks 154-36 of the sliding block 154-4 are rolled, the angle formed on the back of the main block 154-34 of the sliding block 154-4. Check through the indication to measure the twist angle of the protection box (12).

In addition, the measurer reads the scale using the second block Y-axis measuring ruler 152 attached to the first base plate 151 using the instruction block 153-6 of the lower block 153, and the protection box 12. Measure the Y axis lateral length.

In addition, the measurer reads the X-axis full-length measurement ruler 134 through the indicator plate 145 formed vertically in the second LM block 143 of the second LM guide 140, and the X-axis full-length of the wiper arm 15. Measure At this time, the X-axis electric field measuring ruler 134 is an error of the coupling pin block 164 of the second measuring jig 160, that is, the arm piece 14 to the coupling pin 164-2 of the coupling pin block 164. Is attached in a state of being corrected by a distance that does not form the same line as the indicator plate 145 when the coupling, and the side of the second LM block 143 also has a coupling pin block ( The error with the arm piece 14 coupled to the coupling pin 164-2 of 164 is attached in a corrected state.

In addition, the measurer reads a scale indicating that the upper surface of the elevating block 163 indicates the downward distance measuring ruler 161-1 to measure the downward distance of the wiper arm 15, and measures the first distance of the second LM guide 140. 2 The Y-axis side length of the wiper arm 15 is measured by reading the scale which the side surface of the LM block 143 points to the 1st Y-axis direction measurement ruler 144. As shown in FIG.

Finally, the measurer measures the downward distance of the wiper arm 15 by reading a scale in which the upper surface of the elevating block 163 matches the downward ruler 161-1.

Therefore, the measurer reads the angle and scale with the wiper arm fixed to determine the exact specifications of the wiper arm (the torsion angle and Y-axis lateral length of the protection box, the downward distance of the wiper arm, the Y-axis lateral length and the X-axis full length). Can be measured at the same time.

According to the specification of the wiper arm of the present invention constituted as described above, the specifications of the wiper arm in the state of fixing the wiper arm (torsion angle and Y axis lateral length of the protection box, the downward distance of the wiper arm, the Y axis lateral length and X It is possible to prevent the occurrence of product defects by allowing easy and accurate measurement of the full length of the shaft.

Claims (10)

In the measuring apparatus for measuring the specifications of the wiper arm comprising a protection box, a retainer and an arm piece, A base frame; A box fixing jig installed at one end of an upper surface of the base frame to fix the protection box; A first LM guide vertically fixed in the X-axis direction at the front end of the box fixing jig so that the first LM block is slidably moved in the X-axis according to the rotation of the first ball screw with the handle; A second LM guide fixed to an upper surface of the first LM block of the first LM guide such that the second LM block is slidably moved in the Y axis according to the rotation of the second ball screw with the handle; A first measuring jig fixed to both sides of the first LM guide to measure the torsion angle and the Y axis lateral length of the protection box while being lifted and lowered on the Y-axis while the retainer is seated; And It is fixed to the upper surface of the second LM block of the second LM guide, and measuring the downward distance and the Y-axis lateral length of the wiper arm while being moved up and down and sliding in the Y-axis while the armpiece of the wiper arm is coupled 2. A wiper arm specification measuring device, comprising: a measuring jig. The method of claim 1, On the side of the first LM guide, An x-axis electric field measuring ruler capable of measuring the X-axis full length of the wiper arm is further attached to the wiper arm. The method of claim 2, The second LM block of the second LM guide, Wiring arm specification measuring device, characterized in that the indicator plate is attached vertically on the inner surface thereof to read the ruler for measuring the X-axis electric field. The method of claim 1, The vox fixing jig, Is formed in a rectangular bar shape, the first guide groove is formed in the longitudinal direction on both sides and the front surface, the body having a fixing plate on the bottom; A first fixing plate coupled to and fixed by the bolt to the first guide groove at an upper portion of the body; A fixing lever fixed to the front surface of the first fixing plate to move the shaft up and down; A fixing block formed at the shaft end of the fixing lever to fix the protection box; A second fixing plate coupled to and fixed by the bolt to the first guide groove at the bottom of the body; And And a fixing member having a fixing pin fixed to an upper surface of the second fixing plate to insert the protection box therein. The method of claim 4, wherein The fixing pin, The wiper arm specification measuring device is formed so as to be detachable from the fixing member. The method of claim 1, The second LM guide, A first Y-axis lateral measurement ruler for measuring the Y-axis lateral length of the wiper arm is further attached to the upper surface, The first Y-axis direction measurement ruler, Scales of the wiper arm, characterized in that formed on both sides from the center of the second LM guide, respectively. The method of claim 1, The first measuring jig, A first base plate coupled to the support wall and having a pair of first guide rails formed on an upper surface thereof; A second Y-axis lateral measurement ruler attached to a side of the first base plate to measure a Y-axis lateral length of the protection box; A first guide block coupled to the first guide rail is formed at a bottom thereof to slide on the Y axis by the first screw handle on the first guide rail, and a third ball screw vertically coupled to the second screw handle is vertically formed. A lower block having a second guide rail vertically formed on one side of the upper surface, and having an instruction block reading a scale of the second Y-axis lateral measurement ruler on a side thereof; And A second guide block coupled to the second guide rail is formed at a side thereof, and is lifted and lowered from the second guide rail by a second screw handle of the third ball screw, and is slid by a third screw handle formed at a side thereof. And an upper block which slides the block in the X-axis direction along the second guide groove formed therein. The method of claim 7, wherein The sliding block, A main block having a third guide groove engaged with the second guide groove on a side surface, a semi-cylindrical seating groove formed on an upper surface thereof, an angle displayed on the rear surface thereof, and fastening screws fastened to both sides thereof; The bottom surface is formed in a shape corresponding to the seating groove to be seated in the seating groove of the main block to be rolled left and right, the V groove is formed in the longitudinal direction on the upper surface, the angle is displayed on one side, by the fixing screw It consists of a stationary rolling block, The retainer is mounted on the V-groove of the rolling block, and the twisting angle of the protection box is measured by checking the angle at which the rolling block is rolled in a state where the retainer is leveled. . The method of claim 3, wherein The second measuring jig, A second base plate fixed to an upper surface of the second LM block and having a downward distance measuring ruler vertically fixed to an upper surface thereof to measure a downward distance of the wiper arm; A support block which is bent with a needle thread and is fastened to an inner side and a side of the second base plate, and is attached with a third guide rail perpendicularly to an upper end of the upper end, and a stopper provided at the upper center; An insertion groove into which a fourth screw handle is inserted, and a fourth ball screw is penetrated in the state where the fourth screw handle is inserted into the insertion groove and fastened to the support block while being engaged with the fourth screw handle; A elevating block having a fourth guide groove coupled to the third guide rail on a side thereof and installed to be in contact with a side of the down distance measuring ruler; And And a coupling pin block fixed to the upper and lower surfaces of the elevating block by a rotation shaft, and a coupling pin block parallel to the rotation shaft formed to engage the arm piece. The method of claim 9, The downward distance measuring ruler, A wiper arm specification measuring device, characterized in that the graduation is formed on both sides from the upper surface of the lifting block.

Images