CN202757956U - rotatable edge finder - Google Patents

Abstract

The utility model relates to a rotatable edge finder, which comprises a base, a cantilever arranged on the base and a probe arranged on the cantilever; the method is characterized in that: the base comprises a fixed unit and a rotating unit which can be rotatably arranged on the fixed unit, and the cantilever is arranged on the rotating unit. Therefore, the utility model discloses a cantilever and probe can rotate and leave the position when point contact operation goes on along with the rotation unit of base to other limit wares of seeking that are close to carry out the probe and change the operation.

Description

rotatable edge finder

technical field

The utility model is related to an edge sensor mounted on a probing device (prober) which uses a probe to detect the properties of semiconductor crystal grains such as light-emitting diodes, in particular to a rotatable edge sensor.

Background technique

A spot measuring device is a device that uses a probe to detect the performance or characteristic parameters of semiconductor grains such as light-emitting diodes. The spot measuring device usually includes at least one edge finder. As shown in FIGS. sheet 130, and a probe 140 arranged at one end of the cantilever 120, an adjustable pre-force applicator 150 is also provided between the cantilever 120 and the base 110, and two conductors 160 are respectively fixed on the cantilever 120 and the base 110. , 170, the two conductors 160, 170 are kept in contact with each other by the preforce applied by the preforce applicator 150 and are electrically connected.

When the edge finder 100 is used, its probe 140 is electrically connected to a testing machine. The edge finder 100 is driven down by a vertically reciprocating feed mechanism or a device under test (Device Under Test) is driven up by a vertically reciprocating bearing table, and the probe 140 can be in contact with the device under test, so that The testing machine can output test signals to the object under test and receive test results from the object under test, so as to detect or verify the good or bad of the circuit or electrical characteristics of the object under test.

Once the probe 140 exerts the probing force on the object to be tested so that its reaction force overcomes the pre-force, the cantilever 120 will be caused to swing and the elastic piece 130 will be elastically bent and deformed, so that the two conductors 160, 170 are separated from each other and disconnected. , and at the same time, once the spot measuring device detects the signal of the disconnection of the two conductors 160, 170, it immediately stops the aforementioned feeding action. Thus, the edge finder 100 can ensure that the probe 140 can actually contact and apply a certain pressing force on the object to be tested, and the edge finder 100 can also prevent the needle pressure of the probe 140 on the object to be measured from being too large cause damage to the object under test or the probe 140 .

The same point measuring device is often equipped with multiple edge finders as mentioned above to touch multiple electrical contacts of the same object under test at the same time, or to touch multiple objects under test at the same time. The position configuration of each edge finder needs to be The position of the electrical contacts to be touched often makes the probes quite close to each other, so that it is very difficult to replace the probes without disassembling the edge finder from the measuring device. In other words, conventional edge finders are likely to make it difficult to replace the probes of other edge finders adjacent to it, so there is still room for improvement.

Contents of the invention

In view of the above problems, the main purpose of this utility model is to provide a rotatable edge finder, which can make its cantilever and probe leave the position when the touch operation is in progress by rotating, so that other adjacent edge finders can carry out Probe replacement.

In order to achieve the above purpose, a rotatable edge finder provided by the utility model includes a base, a cantilever disposed on the base, and a probe disposed on the cantilever; it is characterized in that: The base includes a fixed unit, and a rotating unit rotatably arranged on the fixed unit, and the cantilever is arranged on the rotating unit.

In the above-mentioned technical solution of the utility model, it also includes a rotating shaft connecting the fixed unit and the rotating unit, the rotating unit can be rotated around the rotating shaft by an external force from a starting position, and the cantilever can rotate around the rotating shaft when it is rotating. When the unit is at the initial position, it is substantially horizontal, and the rotating shaft is substantially horizontal and perpendicular to the cantilever.

The fixing unit has a front stop surface. When the rotation unit is at the initial position, the front stop surface of the fixation unit faces the probe, and the rotation unit abuts against the front blocking surface.

The fixing unit also has an upper stop surface above the front stop surface, and when the rotating unit rotates in a predetermined direction, it can be resisted by the upper stop surface and stop at a limit position.

It also includes a magnetic attraction assembly. The magnetic attraction assembly has two components that can attract each other. The two components are respectively arranged on the fixed unit and the rotating unit. When the cantilever moves with the rotation of the rotating unit, When swinging to a substantially vertical posture, the two members of the magnetic attraction assembly attract each other, so that the cantilever maintains a substantially vertical posture.

The component of the magnetic attraction assembly disposed on the fixed unit is a magnet, and the component of the magnetic attraction assembly disposed on the rotating unit is a magnetic conductor.

The magnetic guide is a screw locked on the rotating unit.

The rotating shaft passes through the rotating unit, and the tail end of the magnetic-conducting member is against the rotating shaft.

It also includes another magnet arranged on the rotating unit, and the two magnets attract or repel each other to provide a force acting on the rotating shaft.

The fixing unit includes a connecting piece, the connecting piece has a top wall, a right side wall and a left side wall, the left and right side walls are respectively equipped with a bearing, and the rotating shaft passes through the two In the bearing; the rotating unit includes a rotating member, the rotating member is located between the left and right side walls of the connecting member and fixedly connected to the rotating shaft, and the rotating member has a connection with the connecting member The top corresponding to the top wall, and a bottom connected to the cantilever; the magnet and the magnetic guide part of the magnetic attraction assembly are respectively arranged on the top wall of the connecting part and a front side of the rotating part.

The edge finder also includes another magnet disposed on the top of the rotating member. The two magnets attract or repel each other to provide a force acting on the rotating shaft.

The fixing unit also includes a limiting member that can move between an active position and a non-active position and penetrates the top wall of the connecting member; when the limiting member is at the active position and the When the rotating unit rotates in a predetermined direction, the limiting member can abut against the rotating unit to limit the rotation angle of the rotating unit; when the limiting member is in the inactive position, the limiting member Leave the turning unit.

The fixing unit includes a connecting piece, the connecting piece has a top wall, a right side wall and a left side wall, the left and right side walls are respectively equipped with a bearing, and the rotating shaft passes through the bearing In; the rotating unit includes a rotating member, the rotating member is located between the left and right side walls of the connecting member and fixedly connected to the rotating shaft, and the rotating member has a top connected to the connecting member A top corresponding to the wall, and a bottom connected to the cantilever; the two components of the magnetic attraction assembly are respectively arranged on the top wall of the connecting piece and a front side of the rotating piece.

The fixing unit is also provided with a limiter capable of moving between an active position and a non-active position; when the limiter is located at the active position and the rotating unit rotates in a predetermined direction, the The limiter can abut against the rotation unit to limit the rotation angle of the rotation unit; and when the limiter is in the inactive position, the limiter leaves the rotation unit.

It also includes a rotating shaft connecting the fixed unit and the rotating unit, the rotating unit can be rotated around the rotating shaft by an external force from a starting position, and the cantilever is substantially in the shape of a cantilever when the rotating unit is at the starting position. In a horizontal posture, the rotating shaft is substantially in a vertical posture.

The fixed unit has a front stop surface, and the rotation unit has a rear abutment surface. When the rotation unit is at the initial position, the front stop surface of the fixation unit faces the probe , and the rear abutting surface of the rotating unit abuts against the front stop surface.

The rotating unit also has a side abutting surface, and when the rotating unit rotates in a predetermined direction, the side abutting surface can be resisted by the front stop surface of the fixing unit to stop at a limit position.

The rotating shaft can be set at one of a first position and a second position, and the rotating unit can rotate in a first predetermined direction from the initial position when the rotating shaft is set at the first position, The rotating unit can rotate from the initial position in a second predetermined direction opposite to the first predetermined direction when the rotating shaft is disposed at the second position.

The rotating unit also has a first side abutting surface and a second side abutting surface; when the rotating shaft is set at the first position and the rotating unit rotates in the first predetermined direction, the The rotating unit can stop at a first limit position with the first side abutting surface being resisted by the front stop surface of the fixing unit; when the rotating shaft is set at the second position and the rotating unit is When rotating in the second predetermined direction, the rotating unit can stop at a second extreme position with the second side abutting surface being resisted by the front stop surface of the fixing unit.

With the above technical solution, the cantilever and the probe of the utility model can rotate with the rotation unit of the base to leave the position when the touch operation is in progress, so as to stay away from the probes of other adjacent edge finders, so that the probe replacement operation is easier. easy to carry out.

Description of drawings

Fig. 1 is a three-dimensional combination diagram of a conventional edge finder;

Fig. 2 is a side view of the edge finder shown in Fig. 1;

Fig. 3 is a first preferred three-dimensional combination diagram of the utility model;

Fig. 4 is a three-dimensional exploded view of the first preferred embodiment of the utility model;

Fig. 5 is a side view of the first preferred embodiment of the utility model, showing a state where a rotating unit of a base of the edge finder is located at an initial position;

Fig. 6 is similar to Fig. 5, showing the state that the rotating unit is in a limit position;

Fig. 7 is a three-dimensional schematic diagram of a spot measuring device including four rotatable edge finders provided by the first preferred embodiment of the present invention, wherein the rotating units of each edge finder are located at the initial position;

Figure 8 is similar to Figure 7, showing that only one of the edge finders is at the initial position of the spot measuring device;

Fig. 9 is a three-dimensional combined view of a second preferred embodiment of the utility model;

Fig. 10 is a three-dimensional exploded view of the second preferred embodiment of the utility model;

Fig. 11 is the second preferred sectional view of the utility model, showing a state where a rotating unit of a base of the edge finder is located at an initial position;

Fig. 12 is similar to Fig. 11, showing the state that the rotating unit is in a limit position;

Fig. 13 is a three-dimensional combined view of a third preferred embodiment of the present invention;

Fig. 14 is a three-dimensional exploded view of the third preferred embodiment of the utility model;

Fig. 15 is a top view of the third preferred embodiment of the utility model, showing a state where a rotating unit of a base of the edge finder is located at an initial position;

Fig. 16 is similar to Fig. 15, showing that the rotation unit is in a state of a first extreme position;

Fig. 17 is similar to Fig. 15, showing that the rotation unit is in a state of a second extreme position;

Fig. 18 is a three-dimensional schematic diagram of a spot measuring device including four rotatable edge finders provided by the third preferred embodiment of the present invention, wherein the rotating units of each edge finder are located at the initial position;

Fig. 19 is similar to Fig. 18, showing that only one of the edge finders is in the initial position of the survey device.

Detailed ways

In order to describe the structure, features and effects of the present utility model in detail, the following preferred embodiments are given below together with the accompanying drawings.

The applicant first explains here that in the embodiments and drawings to be described below, the same reference numerals denote the same or similar elements or structural features.

As shown in Figures 3 to 6, the rotatable edge finder 11 provided by a first preferred embodiment of the present invention includes a base 20, a cantilever 30, a probe 40, and a pre-force applying unit 50 , and a conductive unit 60 .

The base 20 includes a fixing unit 22 , a rotating unit 24 , and a rotating shaft 26 . The fixing unit 22 includes a fixing member 222 , and the rotating unit 24 includes a rotating member 242 and a driven member 244 . The follower 244 , the cantilever 30 , the probe 40 , the pre-force applying unit 50 and the conducting unit 60 are the same as those in the prior art.

The fixing member 222 has a body 222a with a trapezoidal cross section, and two connecting parts 222b extending forward and downward from the body 222a. The two connecting parts 222b are respectively provided with a through hole 222c and a screw hole 222d. Each connecting part 222b respectively have a front stop surface 222e, and an upper stop surface 222f located above the front stop surface 222e.

The rotating member 242 has a body 242a with a trapezoidal cross-section, and a connecting portion 242b extending obliquely upward from the body 242a. The connecting portion 242b defines a shaft hole 242c substantially horizontally penetrating through the connecting portion 242b. The follower 244 is fixed on the bottom of the rotating member 242 by screws.

The rotating shaft 26 passes through the through hole 222c of the fixing member 222 and the shaft hole 242c of the rotating member 242 in sequence, and is screwed and fixed to the screw hole 222d of the fixing member 222 by the threaded portion 262 at one end.

The cantilever 30 includes an elastic piece 32, a front cantilever part 34 and a rear cantilever part 36. The upper half of the elastic piece 32 is locked on the front side of the follower 244 by screws, and the front cantilever part 34 and the rear cantilever part 36 are respectively connected by screws. It is fixed on the front side and the rear side of the lower half of the elastic piece 32 . The probe 40 is disposed on the front cantilever 34 .

The pre-force applying unit 50 includes a bolt 52 passing through the follower 244, a magnet (not shown) disposed at the bottom of the bolt 52, and a metal screw 54 passing through the rear suspension member 36 and opposite to the magnet. . The conductive unit 60 includes an insulating part 62 fixed on the bottom of the follower 244 , and a first conductive part 64 and a second conductive part 66 respectively fixed on the insulating part 62 and the rear cantilever part 36 . The pre-force generated by mutual attraction between the magnet of the pre-force applying unit 50 and the metal screw 54 makes the two conductive elements 64 , 66 contact each other and conduct electrical conduction.

When the edge finder 11 is in the use state of the touch operation, the rotating unit 24 is located at a starting position P1 (as shown in FIG. 5 ), at this time, the cantilever 30 is in a substantially horizontal posture, and the front stop surface of the fixed unit 22 222e is toward the probe 40, and the rotating member 242 of the rotating unit 24 abuts against the front stop surface 222e.

Since the rotating shaft 26 is substantially horizontal and perpendicular to the cantilever 30, when the rotating shaft 26 is unscrewed, the rotating unit 24 can be rotated around the rotating shaft 26 in a predetermined direction D1 from the initial position P1 by an external force, and then the cantilever 30 can be turned upwards. , until the rotating unit 24 is stopped at a limit position P2 (as shown in FIG. 6 ) by being resisted by the upper stop surface 222f.

When the touch operation is actually carried out, the edge finder 11 is fixed on a feed mechanism 70 (as shown in FIG. 7 ) with its fixing part 222, so as to be driven by the feed mechanism 70 to move along the three axes, and the probe 40 is electrically connected with a testing machine (not shown in the figure). When the edge finder 11 is performing a touch operation, its rotating unit 24 is located at the initial position P1 as shown in Figure 5, and the edge finder 11 moves from top to bottom with the probe 40 relative to an object to be measured (not shown in the figure). Contact the conductive contact of the object under test, so that the testing machine can output the test signal to the object under test and receive the test result from the object under test, so as to detect or verify the circuit quality or electrical characteristics of the object under test. In the process of continuous feeding, once the reaction force applied by the object to be tested to the probe 40 overcomes the pre-force applied by the pre-force applying unit 50, the cantilever 30 will swing with the fulcrum of the shrapnel 32, so that the two conductors 64, 66 interact with each other. Separate, and then send a disconnection signal to make the feeding mechanism 70 stop the aforementioned feeding action, so as to prevent the object under test from being damaged due to excessive needle pressure exerted by the probe 40 .

As shown in Figures 7 and 8, when the same measuring device is provided with multiple edge finders 11, and their probes 40 are quite close to each other, the user can replace the probe 40 of one of the edge finders 11 Each cantilever 30 can be turned upwards by rotating the rotating units 24 of other adjacent edge finders 11 in the predetermined direction D1 as shown in FIG. 5 , so as to allow enough space for probe replacement operations.

The rotation mode of the rotatable edge finder provided by the utility model is not limited to the method provided by the foregoing embodiments, as long as the base of the edge finder includes a fixed unit and a rotating unit, so that the The cantilever can rotate with the rotating unit and then leave its position for spot measurement. Two more embodiments are listed below, the structure of the base is different from the base 20 of the aforementioned first preferred embodiment, but the aforementioned effects can also be achieved.

As shown in Figures 9 to 12, the base 80 of the rotatable edge finder 12 provided by a second preferred embodiment of the present invention mainly includes a fixing unit 82, a rotating unit 84, and a Two bearings 85 and a rotating shaft 86 of the unit 82 and the rotating unit 84 .

The fixing unit 82 includes a fixing part 822 for fixing with the feeding mechanism, and a connecting part 824 fixed at the bottom of the fixing part 822 . The shape of the connector 824 is similar to that of the follower 244 in the aforementioned first preferred embodiment, and is also equipped with the bolt 52 and the magnet of the pre-force applying unit 50, and the insulator 62 of the conductive unit 60 and the first Conductive member 64 . However, the front end of the connecting member 824 also has a receiving groove 824d defined by a top wall 824a, a right side wall 824b, and a left side wall 824c, and its front side and bottom side are open.

The rotating unit 84 includes a rotating member 842. The rotating member 842 has a right side 842a, a left side 842b, and a shaft hole 842c passing through the left and right sides 842b, 842a. The rotating member 842 is disposed in the accommodating groove 824d It is located between the left and right side walls 824c, 824b of the connecting member 824 . The two bearings 85 are installed on the left and right side walls 824c, 824b of the connecting piece 824 respectively, and the rotating shaft 86 is penetrated in the shaft hole 842c of the second bearing 85 and the rotating member 842, and the rotating member 842 and the rotating shaft 86 are arranged through a lock. The set screws 87 on the rotating member 842 and against the rotating shaft 86 are fixed to each other (as shown in FIG. 11 ).

The front and rear cantilever members 34 , 36 of the cantilever 30 are locked to each other and to the bottom of the rotating member 842 by screws.

Thus, the rotating shaft 86 is substantially horizontal and perpendicular to the cantilever 30, so the rotating unit 84 can rotate in a predetermined direction D1 from its initial position P1 where the cantilever 30 is substantially horizontal (as shown in FIG. 11 ). , and then the cantilever 30 is turned upwards to allow enough space for the adjacent edge finder to perform probe replacement operations.

The fixing unit 82 can further have a limiting member 826 , which is a screw passing through the top wall 824 a of the connecting member 824 , and can be rotated to move relative to the connecting member 824 . When the limiting member 826 is located at an active position P3 as shown in FIG. 11 , it can be used to stop the rotating member 842 rotating in a predetermined direction D1, so as to limit the rotation angle of the rotating member 842 when the edge finder 12 performs a touch operation. In order to give full play to the function of the edge finder 12. When the limiting member 826 is located at a non-active position P4 as shown in FIG. The stylus can move away from its original touch position, thus freeing up the space required for other edge finder stylus replacement operations.

The base 80 can also be provided with a magnetic attraction assembly 88, and the magnetic attraction assembly 88 has two members 882, 884 that can attract each other, that is, the two members 882, 884 can be both magnets, or the two members 882, 884 can be a magnet and a magnetically conductive part (such as metal). The two components 882 and 884 are respectively disposed on the top wall 824a of the connecting part 824 and a front side 842d of the rotating part 842 . Thus, when the cantilever 30 swings to a substantially vertical posture with the rotation of the rotating unit 84 (as shown in FIG. 12 ), the two members 882, 884 are attracted to each other, so that the cantilever 30 remains substantially vertical. attitude.

In this embodiment, the component 882 of the magnetic attraction assembly 88 disposed on the fixing unit 82 is a magnet, while the component 884 disposed on the rotating unit 84 is a magnetic conducting member, and the magnetic conducting member 884 is locked on the rotating member 842 Therefore, in addition to realizing the aforementioned functions, the magnetically conductive member 884 can also push against the rotating shaft 86 with its tail end, so that the rotating member 842 and the rotating shaft 86 are fixed more firmly. In addition, another magnet 89 can be provided on the top of the rotating member 842 corresponding to the top wall 824a. When the probe 40 touches the object to be tested, the rotating unit 84 is located at the initial position P1 (as shown in FIG. 11 ). At this time, The two magnets 882, 89 attract or repel each other (depending on whether their magnetism is the same or different), so that the rotating member 842 drives the rotating shaft 86 to press against the bearing 85 upwards or downwards, thereby eliminating the gap between the rotating shaft 86 and the bearing 85 and the bearing 85 In other words, the magnetic force of the two magnets 882, 89 can eliminate the gap of the deflection of the rotating shaft 86, so as to avoid the unexpected swing of the cantilever 30 and cause the probe 40 to leave an excessive needle on the object to be tested. mark.

As shown in Figures 13 to 17, the base 90 of the rotatable edge finder 13 provided by a third preferred embodiment of the present invention includes a fixing unit 92, a rotating unit 94, and a connection fixing unit 92 and the rotating shaft 96 of the rotating unit 94 .

The fixing unit 92 includes a fixing piece 922, the fixing piece 922 has a body 922a, and a connecting portion 922c extending from a front stop surface 922b of the body 922a, the connecting portion 922c is provided with a substantially vertical connection portion 922c A first shaft hole 922d and a second shaft hole 922e.

The rotating unit 94 includes a rotating part 942 and a driven part 944 fixed on the bottom of the rotating part 942 . Since the shape of the follower 944 and the connection relationship with the cantilever 30 , the pre-force applying unit 50 and the conductive unit 60 are the same as those of the follower 244 in the first preferred embodiment, it will not be repeated here. The rotating member 942 has a main body 942a, and two connecting parts 942b extending backward from the main body 942a, wherein one connecting part 942b is provided with a first through hole 942c and a second through hole 942d, and the other connecting part 942b is provided with two respectively and two The through holes 942c and 942d are opposite to the screw holes 942e. Each connecting portion 942b has a rear abutting surface 942f, a first side abutting surface 942g and a second side abutting surface 942h.

The rotating shaft 96 can pass through the first through hole 942c and the first shaft hole 922d, and is screwed and fixed to the screw hole 942e opposite to the first through hole 942c with a threaded portion 962 thereof, and is located at a first position P5 (as shown in FIG. 15 and Figure 16). Alternatively, the rotating shaft 96 can pass through the second through hole 942d and the second shaft hole 922e, and be screwed and fixed to the screw hole 942e opposite to the second through hole 942d with its threaded portion 962, and be located at a second position P6 (as shown in FIG. 17). Regardless of whether the rotating shaft 96 is located at the first position P5 or the second position P6, the rotating shaft 96 is substantially vertical, so that the rotating unit 94 can rotate substantially horizontally.

As shown in FIG. 15 , when the rotating unit 94 is at the initial position P1, the front stop surface 922b of the fixing member 922 faces the probe 40, and the rear abutment surface 942f of the rotation unit 94 is against the front stop surface 922b. . When the rotating shaft 96 is set at the first position P5 and is unscrewed, the rotating unit 94 can be rotated in a first predetermined direction D2 around the rotating shaft 96 by an external force from the initial position P1 until the rotating unit 94 presses against the first side surface 942g It is stopped at a first extreme position P7 (as shown in FIG. 16 ) by being resisted by the front stop surface 922b. When the rotating shaft 96 is set at the second position P6 and unscrewed, the rotating unit 94 can be subjected to an external force from the initial position P1 to rotate around the rotating shaft 96 in a second predetermined direction D3 opposite to the first predetermined direction D2 until the rotating unit 94 The second side abutting surface 942h is stopped at a second extreme position P8 (as shown in FIG. 17 ) by being resisted by the front stop surface 922b.

Thus, as shown in Figure 18 and Figure 19, when the same point measuring device is provided with multiple edge finders 13, and the probes 40 thereof are quite close to each other, the user can replace the probe of one of the edge finders 13. When the needle 40 is used, the rotating unit 84 of other adjacent edge finders 13 is rotated in the first predetermined direction D2 or the second predetermined direction D3 (depending on its relative position with the edge finder of the probe to be replaced), and then each The cantilever 30 is deflected sideways to allow enough room for probe changing operations.

To sum up, the focus of this utility model is to make the base of the edge finder include a fixed unit and a rotating unit that can rotate relative to the fixed unit, so that the cantilever installed on the rotating unit can rotate away from it The location of the spot measurement operation to allow space for the adjacent edge finder to facilitate the replacement of the probe. The structure of the base and the direction of rotation of the rotating unit are not limited, and the fixing unit does not have to be provided with features or elements that can stop the rotating unit or maintain the position of the rotating unit. Secondly, the mechanism design for realizing the function of the edge finder is not limited to the methods disclosed in the above-mentioned embodiments, that is, the pre-force applying unit is not limited to the magnetic force, and springs can also be used to provide the pre-force, and the shrapnel can also It can be connected with the cantilever in the traditional horizontal attitude mode. In other words, the technical features provided by the utility model can be applied to various existing edge finders, such as those disclosed in Chinese Taiwan Patents No. M345241 and No. M382589 Various edge finders.

Finally, it must be explained again that the constituent elements disclosed in the foregoing embodiments of the present utility model are only for illustration, and are not used to limit the scope of patent protection of this case. The substitution or change of other equivalent elements should also be covered by the present utility model. covered by the scope of patent protection.

Claims (19)

1. the rotating limit device of seeking includes the cantilever that a pedestal, is arranged at described pedestal, and a probe that is arranged at described cantilever; It is characterized in that:

Described pedestal includes a fixed cell, and a rotating unit that can be arranged at rotationally described fixed cell, and described cantilever is arranged at described rotating unit.

2. the rotating limit device of seeking as claimed in claim 1, it is characterized in that: also include the rotating shaft of a described fixed cell of connection and described rotating unit, described rotating unit can be subjected to external force from an initial position and rotate around described rotating shaft, described cantilever is in fact the attitude of level when described rotating unit is positioned at reference position, described rotating shaft is in fact level and the attitude vertical with described cantilever.

3. the rotating limit device of seeking as claimed in claim 2, it is characterized in that: described fixed cell has a front stopping surface, when described rotating unit was positioned at described reference position, the front stopping surface of described fixed cell was towards described probe, and described rotating unit is against described front stopping surface.

4. the rotating limit device of seeking as claimed in claim 3, it is characterized in that: described fixed cell also has a upper stopping surface that is positioned at described front stopping surface top, and described rotating unit is kept out by described upper stopping surface can when rotating with a predetermined direction and stop scheduling an extreme position.

5. the rotating limit device of seeking as claimed in claim 2, it is characterized in that: also include a magnetic assembly, described magnetic assembly has two members that can inhale mutually, described two members are arranged at respectively described fixed cell and described rotating unit, when described cantilever along with the rotation of described rotating unit swing when being in fact vertical attitude, described two members of described magnetic assembly are inhaled mutually, make described cantilever remain on the attitude that is in fact vertical.

6. the rotating limit device of seeking as claimed in claim 5, it is characterized in that: the member that described magnetic assembly is arranged at described fixed cell is a magnet, the member that described magnetic assembly is arranged at described rotating unit is a magnetic conductive part.

7. the rotating limit device of seeking as claimed in claim 6, it is characterized in that: described magnetic conductive part is the screw that is locked on described rotating unit.

8. the rotating limit device of seeking as claimed in claim 7, it is characterized in that: described rotating shaft is arranged in described rotating unit, and the tail end of described magnetic conductive part is resisted against described rotating shaft.

9. such as each described rotating limit device of seeking in the claim 6 to 8, it is characterized in that: also include the magnet that another is arranged at described rotating unit, described two magnet are for inhaling mutually or repel each other, so that a strength that acts on described rotating shaft to be provided.

10. such as each described rotating limit device of seeking in the claim 6 to 8, it is characterized in that: described fixed cell includes a connection piece, described web member has a roof, a right side wall and a left side wall, described left and right sidewall is equiped with respectively a bearing, and described rotating shaft is arranged in described two bearings; Described rotating unit includes a tumbler, and described tumbler is between the left and right sidewall of described web member and affixed with described rotating shaft, and described tumbler has a top corresponding with the roof of described web member, and a bottom that is connected with described cantilever; The magnet of described magnetic assembly and magnetic conductive part are located at respectively the roof of described web member and a leading flank of described tumbler.

11. the rotating limit device of seeking as claimed in claim 10 is characterized in that: the described limit device of seeking also includes the magnet that another is arranged at described tumbler top, described two magnet are for inhaling mutually or repel each other, so that a strength that acts on described rotating shaft to be provided.

12. the rotating limit device of seeking as claimed in claim 11 is characterized in that: described fixed cell also includes a locating part that can be arranged in movably the roof of described web member between an active position and a non-working position; When described locating part was positioned at described active position and described rotating unit and rotates with a predetermined direction, described locating part can be supported described rotating unit to limit the rotational angle of described rotating unit; When described locating part was positioned at described non-working position, described locating part left described rotating unit.

13. the rotating limit device of seeking as claimed in claim 5, it is characterized in that: described fixed cell includes a connection piece, described web member has a roof, a right side wall and a left side wall, and described left and right sidewall is equiped with respectively a bearing, and described rotating shaft is arranged in the described bearing; Described rotating unit includes a tumbler, and described tumbler is between the left and right sidewall of described web member and affixed with described rotating shaft, and described tumbler has a top corresponding with the roof of described web member, and a bottom that is connected with described cantilever; Described two members of described magnetic assembly are located at respectively the roof of described web member and a leading flank of described tumbler.

14. the rotating limit device of seeking as claimed in claim 5 is characterized in that: described fixed cell also is provided with a locating part that can move between an active position and a non-working position; When described locating part was positioned at described active position and described rotating unit and rotates with a predetermined direction, described locating part can be supported described rotating unit to limit the rotational angle of described rotating unit; And when described locating part was positioned at described non-working position, described locating part left described rotating unit.

15. the rotating limit device of seeking as claimed in claim 1, it is characterized in that: also include the rotating shaft of a described fixed cell of connection and described rotating unit, described rotating unit can be subjected to external force from an initial position and rotate around described rotating shaft, described cantilever is in fact the attitude of level when described rotating unit is positioned at reference position, described rotating shaft is in fact vertical attitude.

16. the rotating limit device of seeking as claimed in claim 15, it is characterized in that: described fixed cell has a front stopping surface, described rotating unit has a rear abutment face, when described rotating unit is positioned at described reference position, the front stopping surface of described fixed cell is towards described probe, and the rear abutment face of described rotating unit is against described front stopping surface.

17. the rotating limit device of seeking as claimed in claim 16, it is characterized in that: described rotating unit also has a side abutment face, can be subjected to the front stopping surface of described fixed cell to keep out and stop due to an extreme position with its side abutment face when described rotating unit rotates with a predetermined direction.

18. the rotating limit device of seeking as claimed in claim 16, it is characterized in that: described rotating shaft can be arranged at a primary importance and a second place one of them, described rotating unit can rotate with one first predetermined direction from described reference position when described rotating shaft is arranged at described primary importance, and described rotating unit can rotate with second predetermined direction opposite with described the first predetermined direction from described reference position when described rotating shaft is arranged at the described second place.

19. the rotating limit device of seeking as claimed in claim 18 is characterized in that: described rotating unit also has one first side abutment face and one second side abutment face; When described rotating shaft was arranged at described primary importance and described rotating unit and rotates with described the first predetermined direction, described rotating unit can be subjected to the front stopping surface of described fixed cell to keep out and stop due to one first extreme position with described the first side abutment face; When described rotating shaft was arranged at the described second place and described rotating unit and rotates with described the second predetermined direction, described rotating unit can be subjected to the front stopping surface of described fixed cell to keep out and stop due to one second extreme position with described the second side abutment face.

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