CN201007652Y - Laser self-regulating projection line gauge - Google Patents
Laser self-regulating projection line gauge Download PDFInfo
- Publication number
- CN201007652Y CN201007652Y CNU2007201063107U CN200720106310U CN201007652Y CN 201007652 Y CN201007652 Y CN 201007652Y CN U2007201063107 U CNU2007201063107 U CN U2007201063107U CN 200720106310 U CN200720106310 U CN 200720106310U CN 201007652 Y CN201007652 Y CN 201007652Y
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- laser
- laser head
- shell
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Abstract
A laser self-adjusted tossing thread device comprises a casing and a base. A weight portion of an automatic leveling member is arranged inside the casing via a suspension mechanism. Four vertical laser headstocks are equipped around the movement at the upper portion of the weight portion. Laser heads forming a perpendicular line are mounted inside each vertical laser headstock, and the separation angle of each laser headstock is 90 DEG. The casing is provided with vertical laser windows relatively, and a power and a control circuit board are also arranged inside the casing. The utility model is characterized in that the vertical laser headstocks are connected with the hanging top board of the suspension mechanism via screws, the hanging top board is provided with lugs on two sides of each laser headstock, the inside of each lug is connected with a screw which contradicts to the vertical lasers, thereby realizing 90 DEG of the separation angles between four laser heads provided on the movement and realizing perpendicular and horizontal adjustment. The utility model has the advantages of a good adjustment effect and a reasonable and practical structure.
Description
Technical field
The utility model relates to the self-adjusting level of a kind of laser.
Background technology
Laser level is a kind of exact instrument that can project cross horizontal line and perpendicular line on metope, ground and zenith, is widely used in various construction occasions such as interior decoration industry.In order to reduce the installation deviation of laser head, so each laser head has generally all adopted adjusting mechanism.
As the patent No. is that " level laser module adjusting gear comprises several perpendicular line laser modules, and described several perpendicular line laser modules are fixed on a monoblock type and adjust on the seat for 200520070817.2 Chinese patent; Described monoblock type adjustment seat is beveled structure, be evenly equipped with four installing plates on its taper surface, hollow out between four installing plates, installing plate is provided with oblique mounting hole up, the fixed laser module is fixed in the mounting hole, circumferential angle between each mounting hole is 90 degree, and the side of installing plate is provided with the adjustment screw hole; Further improve, the lower edge of installing plate is outward extended with the adjustment plate respectively, adjust plate and be pressed on the levelness adjusting gear that change speed motor, reducing gear and lead screw are formed, it has reduced the alignment error between the laser module, has made things convenient for the adjustment of angle between the laser module.Its defective is: it is too simple that 90 degree between the vertical laser head are adjusted structure, range of adjustment is smaller, and, be in course of adjustment, disturb the perpendicularity of laser rays easily, on the contrary, and adjusting mechanism is too complicated about the level of vertical laser head, the levelness adjusting gear that adopts change speed motor, reducing gear and lead screw to form, and some is lost more than gain, cause volume big, defectives such as cost height.
It as the patent No. 200520076200.1 Chinese patent " laser level ", its advantage rotating mechanism is flexible, can multiplely freely change, because laser head is few, causing defective is to launch cross horizontal line and perpendicular line simultaneously, limited on some occasion and used, and precision may be weaker.
Comprehensively above-mentioned, the self-adjusting level of laser also requires further improvement aspect adjusting mechanism.
The utility model content
Technical problem to be solved in the utility model provides a kind of practicality rational in infrastructure, the self-adjusting level of laser that regulating effect is good.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: the self-adjusting level of a kind of laser, it includes shell and base, housings is connected with the weight part of self leveling by hitch, movement above the weight part distributes along ring week and is provided with four vertical laser head seat, install the laser head that forms perpendicular line in each vertical laser head seat, and the angle between each laser head is 90 degree, shell also is provided with vertical laser window targetedly, power supply and control circuit board also are installed in shell, it is characterized in that described vertical laser head seat is connected with hanging body top board in the hitch by screw, simultaneously, the hanging body top board is provided with lug in the laser head seat both sides, be connected with screw in the lug, the screw vertical laser head seat of conflicting.
As improvement, hanging body middle part in the described hitch has the installation cavity, install in the cavity and be connected with the horizontal laser light headstock rotationally with pin, be provided with the horizontal laser light head in the horizontal laser light headstock, be shaped on screw below the horizontal laser light headstock, cavity bottom is installed has perforation, screw passes perforation, the cover upper spring, the screw below the horizontal laser light headstock links together, thereby can regulate horizontal laser light line projection height easily.
Improve, described vertical laser head seat and horizontal laser light headstock have the elasticity notch on the surface again, and the notch edges part is fixed laser head separately with screw lock, can adjust the horizontality or the perpendicularity of laser head like this, improves measuring accuracy.
Useful improvement is, described vertical laser head seat adopts three screws to be connected with the hanging body top board, and one piece be sunk screw, about two pieces be screw, cooperate with long slot bore on the hanging body top board, be convenient to installation and adjustment.
Useful improvement is, is connected with lock-screw between described installation cavity sidewalls and the horizontal laser light headstock, is convenient to install and adjust.
The improvement that is highly profitable is; described outer casing underpart is connected with supporting plate rotationally by pivot pin; the perforate of supporting plate middle part; overlap rubber ring in the hole; partly cooperate with the weight of hitch, accordingly, the opposite side of shell is provided with locking knob; locking knob inner end biasing post is conflicted with a side of supporting plate and is cooperated; be supported with spring between the spring fixed seat on supporting plate and the base, and the inboard position of shell is fixed with microswitch; contact lever on the microswitch is conflicted with supporting plate and is cooperated; can realize locking and switch synchronous interaction like this,, remove locking when supporting plate has broken away from the weight part downwards; just nature can be pressed onto the contact lever of microswitch; make control circuit work, can be used for measuring, opposite; when supporting plate upwards contacts the weight part; lock the weight part once more, just broken away from the contact lever of microswitch naturally, control circuit is quit work; use very conveniently, and protected the hitch and the operating circuit of self leveling.
Further improve again, described shell is to be connected on the bottom, bottom ring limit distributes equably with screw and is fixed with the chassis locking plate, the chassis locking plate extends in the inner groove in the base, shell is rotatably installed on the base, and, the bottom side is with regulating ring, be connected with the fine motion driving lever on the regulating ring, the fine motion driving lever is set in the adjusting cavity of base side, regulates the cavity sidewalls fine setting screw rod that has been threaded, and conflicts on the fine motion driving lever in fine setting screw rod inner end, regulate cavity opposite side sidewall and be provided with little spring, the inner end of little spring is supported on the fine motion driving lever.
Further improve again, described movement side is connected with the optoelectronic induction sheet, accordingly, be provided with the photoelectric tube of cooperation in hanging body or housings, photoelectric tube is connected on the control circuit of band warning function module, in case movement exceeds certain magnitude of inclination outside like this, makes photoelectric tube can sense the photoelectricity sheet, thereby makes control circuit send alerting signal.
As improvement, described weight part lower end snail line is connected with the damping cover, and damping cover circumference outside is equipped with the rubber anti-collision ring, is fixed with magnetic sheet in the holder on the base, carries out cutting magnetic line with the damping cover and cooperates, and plays to promote the effect of quick Anping.
Improve again, described weight part bottom surface perforate, under penetrate laser head and be plugged in the perforate by O type elastic ring, and be fastened on three no magnetic screws on the bottom surface of weight part, accordingly, have the unthreaded hole of penetrating of cooperation in damping cover bottom surface, by the adjusting of three pieces of screws, can realize penetrating down the vertical of laser head, simple and practical.
At last, described shell is at the vertical fenestrate cover of laser window socket connection, and the joint pin below the window cover penetrates into housings, is fixed on after the blanching to connect and takes on the post, is convenient to install.
Compared with prior art, advantage of the present utility model is: can realize on the movement four vertical laser head angles 90 the degree, and can realize perpendicularity and horizontality adjustment, regulating effect is good, structure is also reasonable and practical, the horizontal laser light head and under penetrate laser head and also can adjust easily, have interlock and locking function, in conjunction with the warning circuit of photoelectric tube, convenient to use, improved safe reliability, shell rotation coarse adjustment and fine setting combine, nature more convenient to use, and increase the service life, be adapted at using on the self-adjusting level of laser.
Description of drawings
Fig. 1 is the stereographic map of the self-adjusting level of laser;
Fig. 2 is the three-dimensional exploded view of the self-adjusting level of laser;
Fig. 3 is the movement stereographic map of the self-adjusting level of laser;
Fig. 4 is the movement vertical view of the self-adjusting level of laser;
Fig. 5 is that Fig. 4 A-A is to cut-open view;
Fig. 6 is that Fig. 4 C-C is to cut-open view;
Fig. 7 is the movement vertical view of the self-adjusting level of laser;
Fig. 8 is that Fig. 7 A1-A1 is to cut-open view;
Fig. 9 is that Fig. 7 B1-B1 is to cut-open view;
Figure 10 is that Fig. 7 C1-C1 is to cut-open view;
Figure 11 is that Fig. 7 D1-D1 is to cut-open view;
Figure 12 a is the three-dimensional exploded view (top) of the self-adjusting level movement of laser and Anping hitch;
Figure 12 b is the three-dimensional exploded view (lower part) of the self-adjusting level movement of laser and Anping hitch;
Figure 13 is the partial cross-sectional perspective view of the self-adjusting level of laser;
Figure 14 is the partial sectional view of the self-adjusting level of laser;
Figure 15 is that the B2-B2 of base is to cut-open view;
Figure 16 is that the A2-A2 of base is to the broken section vertical view.
Embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
Anticipate as shown in the figure, figure number is: shell 1, base 2, upper encloser 3, main casing 4, set collar 6, bracing frame 7, hanging body 8, movement 9, last rotating shaft 10, lower rotary shaft 11, weight part 12, vertical laser head seat 13, laser head 14, hanging body top board 15, screw 16, lug 17, screw 18, elasticity notch 19, screw 20, cavity 21 is installed, pin 22, horizontal laser light headstock 23, lock-screw 24, horizontal laser light 25, screw 26, perforation 27, screw 28, spring 29, perforate 30, under penetrate laser head 31, elastic ring 32, no magnetic screw 33, damping cover 34, penetrate unthreaded hole 35, pivot pin 36, supporting plate 37, perforate 38, rubber ring 3g, locking knob 40, biasing post 41, counterweight screws 42, spring fixed seat 43 is arranged, microswitch 44, contact lever 45, optoelectronic induction sheet 46, photoelectric tube 47, spring 48, rubber anti-collision ring 49, holder 50, magnetic sheet 51, bottom 52, chassis locking plate 53, inner groove 54, fine motion driving lever 55, regulate cavity 56, fine setting screw rod 57, little spring 58, vertical laser window 59, window cover 60, regulating ring 61, horizontal laser light window 62, screw 63.
Anticipate as Figure 1-3, the self-adjusting level of a kind of laser, it includes shell 1 and base 2, and shell is divided into upper encloser 3 and main casing 4, the support ring 5 usefulness screws of one of hanging body composition are connected on the inboard set collar 6 in top of main casing 4, accordingly, presenting criss-cross bracing frame 7 usefulness screws and joint pin is fixed on the support ring 5, formed hanging body 8, hanging body 8 centers are connected following movement 9 by rotating upward rotating shaft with lower rotary shaft mechanism, wherein go up rotating shaft 10 and lower rotary shaft 11 is right-angled intersection, they are connected on the bracing frame 7 by bearing and bearing seat, have formed universal rotation mechanism, and the hitch in this and the traditional Anping instrument is similar, making shell 1 the inside be connected with the weight part 12 of self leveling by hitch like this, is movement 9 above the weight part 12.See Fig. 3-6, movement 9 distributes along ring week and is provided with four vertical laser head seat 13, install the laser head 14 that forms perpendicular line in each vertical laser head seat 13, and the angle between each laser head 14 is 90 degree, in order to reduce in assembling and mismachining tolerance, need adjust, as Fig. 4-6, for this reason, vertical laser head seat 13 is by screw 16,63 are connected with hanging body top board 15 in the hitch, and simultaneously, hanging body top board 15 is provided with lug 17 in vertical laser head seat both sides, lug is connected with screw 18 for 17 li, just the conflicting left and right sides of vertical laser head seat 13 of screw 18.And vertical laser head seat 13 is that two screws 63 are connected with the hanging body top board with a sunk screw 16 about adopting, the taper countersunk head is made at sunk screw 16 corresponding hanging body top board positions, about the hanging body top board position of two screw 63 correspondences make long slot bore, be convenient to vertical laser head seat like this and adjust and lock, nature easy to use.By the screw 18 of the left and right sides, the angle of adjusting vertical laser head seat 13 is at 90 degree, and error is in the scope of precision.
See Fig. 5,6, in addition, vertical laser head seat 13 has elasticity notch 19 at lower surface, notch 19 marginal portions connect locking with screw 20 and fix laser head 14, by unclamping screw, can rotating laser head, after adjusting laser head and sending the perpendicularity of laser rays, tighten screw, lock laser head.
Mainly see Fig. 9, hanging body 8 middle parts have installs cavity 21,21 li of cavitys is installed is connected with horizontal laser light headstock 23 rotationally with pin 22, and install between cavity sidewalls and the horizontal laser light headstock and be connected with lock-screw 24.Be provided with horizontal laser light 25 in the horizontal laser light headstock 23, be shaped on screw 26 below the horizontal laser light headstock 25, cavity bottom is installed has perforation 27, screw 28 passes perforation 27, cover upper spring 29, and the screw 26 below the horizontal laser light headstock links together.Unclamp lock-screw 24 like this, just can rotary screw 28, adjust the horizontal upper-lower position of laser rays of horizontal laser light 25, after adjusting, tighten lock-screw 24 again, fix horizontal laser light headstock 23.Horizontal laser light headstock 23 also has elasticity notch 19 at upper surface, and notch edges partly connects locking with screw 20 and fixes laser head.By unclamping screw, can rotating laser head, after adjusting laser head and sending the horizontality of laser rays, tighten screw, lock laser head.
See Figure 10,9, weight part 12 generally therein upper/lower positions counterweight screws 42 is installed, be convenient to regulate its center of gravity, the 12 bottom surface perforates 30 of weight part, under penetrate laser head 31 and be plugged in the perforate 30 by O type elastic ring 32, and be fastened on the bottom surface of weight part 12 with three no magnetic screws 33, accordingly, penetrate unthreaded hole 35 what damping overlapped that 34 bottom surfaces have a cooperation.Penetrate the following laser rays vertical of penetrating that laser head sends by tightening and regulate no magnetic screw, can adjusting down easily.
See Figure 13,14, shell 1 bottom is provided with pivot pin 36, be connected with supporting plate 37 rotationally by pivot pin, supporting plate 37 middle part perforates 38, cover rubber ring 39 in the hole, cooperate with the weight part 12 of hitch, cooperate with the damping cover exactly herein, accordingly, the opposite side of shell is provided with locking knob 40, there is biasing post 41 locking knob 40 inner ends, conflict with a side of supporting plate 37 and to cooperate, base is equipped with spring fixed seat 43 for 42 li, be provided with spring 48 in the spring fixed seat 43, the other end of spring withstands on the bottom surface of supporting plate 37, simultaneously, the inboard position of shell is fixed with microswitch 44, contact lever 45 on the microswitch 44 is conflicted with supporting plate 37 and is cooperated, and has constituted interlock and locking mechanism like this, when locking knob 40 is screwed into a side, when making biasing post 41 risings of its inside, supporting plate 37 also increases under the elastic reaction of spring, and supporting plate perforate 38 just is enclosed within on the weight part 12 of hitch, locked hitch, on the contrary, when locking knob 40 is screwed into opposite side, the biasing post 41 of its inside is reduced, force supporting plate 37 to overcome the elastic reaction of spring, also decrease, supporting plate perforate 38 has just broken away from the weight part 12 of hitch, no longer locks hitch, movement 9 Anping systems just can work, and pressing down of supporting plate 37 also touched the contact lever 45 on the microswitch, and control circuit is also started working simultaneously, need not to be provided with in addition gauge tap, it is convenient more naturally to use.
See Fig. 2, in order to protect Anping system under the movement better, movement 9 sides are connected with optoelectronic induction sheet 46, accordingly, are provided with the photoelectric tube 47 of cooperation in hanging body or housings, and photoelectric tube 47 is connected on the control circuit.In case movement exceeds certain magnitude of inclination outside like this, makes photoelectric tube can sense the photoelectricity sheet, thereby, make the control circuit of band warning function module send alerting signal, remind the user.
See Figure 13,14,10, weight part 12 lower end screw threads are connected with damping cover 34, damping is overlapped 34 circumference outside and is equipped with rubber anti-collision ring 49, be fixed with magnetic sheet 51 in the holder 50 on the base 2, cooperate with damping cover 34, by the cutting magnetic line of damping cover and magnetic sheet, make Anping system of hitch be more prone to steady.
See Figure 13-16, upper encloser 3 and main casing 4 have connected to form shell 1, the main casing 4 of shell is that screw is connected on the bottom 52, bottom 52 is with regulating ring 61, bottom 52 bases distribute equably with screw and are fixed with three chassis locking plates 53, bottom 52 is installed in the base 2 together with chassis locking plate 53, they can push chassis locking plate 53 in the inner groove 54 of 2 li of bases by the bottom outlet of base 2, shell 1 is rotatably installed on the base 2, and, regulating ring 61 sides are connected with fine motion driving lever 55, fine motion driving lever 55 is set in the adjusting cavity 56 of base side, regulate cavity 56 sidewall thread and be connected with fine setting screw rod 57, conflict on fine motion driving lever 55 in fine setting screw rod 57 inner ends, regulate cavity 56 opposite side sidewalls and be provided with little spring 58, the inner end of little spring 58 is supported on the fine motion driving lever 55, has formed the coarse adjustment and the micro-adjusting mechanism of shell rotation.When adjusting the direction of illumination of vertical laser head, general first rotational shell 1 makes vertical laser window on the shell at the orientation that needs, and carries out coarse adjustment, then, regulate the fine setting screw rod 57 on the cavity sidewalls, contact fine motion driving lever 55, drive regulating ring 61 and rotate by the fine setting screw rod, carry out fine tuning again, realize laser head at accurate irradiation position, easy to use, improved precision.
Power supply and control circuit board also are installed in shell, and in present embodiment, power supply is to adopt battery, and battery cavities designs on the main casing side, is connected with battery cover board outward.Wiring board is divided into polylith, and one is to be placed in the space on battery cavities top, and several settings are fixed on below the movement top board in addition.
See Fig. 1, the upper encloser 3 of shell is at four vertical laser head seat, ordinatedly be provided with four vertical laser windows 59, the vertical fenestrate cover 60 of laser window 59 socket connections, joint pin below the window cover 60 penetrates into upper encloser 3 the insides of shell, is fixed on after the blanching to connect to take on the post.The main casing 4 of shell also is provided with horizontal laser light window 62 facing to the horizontal laser light headstock.
Claims (10)
1. self-adjusting level of laser, it includes shell and base, housings is connected with the weight part of self leveling by hitch, movement above the weight part distributes along ring week and is provided with four vertical laser head seat, install the laser head that forms perpendicular line in each vertical laser head seat, and the angle between each laser head is 90 degree, shell also is provided with vertical laser window targetedly, power supply and control circuit board also are installed in shell, it is characterized in that described vertical laser head seat is connected with hanging body top board in the hitch by screw, simultaneously, the hanging body top board is provided with lug in the laser head seat both sides, be connected with screw in the lug, the screw vertical laser head seat of conflicting.
2. level according to claim 1, it is characterized in that the hanging body middle part in the described hitch has the installation cavity, install in the cavity and be connected with the horizontal laser light headstock rotationally with pin, be provided with the horizontal laser light head in the horizontal laser light headstock, be shaped on screw below the horizontal laser light headstock, cavity bottom be installed have perforation, screw passes perforation, the cover upper spring, the screw below the horizontal laser light headstock links together.
3. level according to claim 2 is characterized in that described vertical laser head seat and horizontal laser light headstock have the elasticity notch on the surface, and the notch edges part is fixed laser head separately with screw lock.
4. level according to claim 3 is characterized in that described vertical laser head seat adopts three screws to be connected with the hanging body top board, and one piece is sunk screw, about two pieces be that screw cooperates with the long slot bore of top board.
5. level according to claim 4 is characterized in that being connected with lock-screw between described installation cavity sidewalls and the horizontal laser light headstock.
6. according to any described level of claim of claim 1 to 5, the described outer casing underpart of its feature is connected with supporting plate rotationally by pivot pin, the perforate of supporting plate middle part, overlap rubber ring in the hole, partly cooperate with the weight of hitch, accordingly, the opposite side of shell is provided with locking knob, locking knob inner end biasing post is conflicted with a side of supporting plate and is cooperated, be supported with spring between the spring fixed seat on supporting plate and the base, and the inboard position of shell is fixed with microswitch, and the contact lever on the microswitch is conflicted with supporting plate and cooperated.
7. level according to claim 6, it is characterized in that described shell is connected on the bottom, bottom ring limit distributes equably with screw and is fixed with the chassis locking plate, the chassis locking plate extends in the inner groove in the base, shell is rotatably installed on the base, and, the bottom side is with regulating ring, be connected with the fine motion driving lever on the regulating ring, the fine motion driving lever is set in the adjusting cavity of base side, regulates the cavity sidewalls fine setting screw rod that has been threaded, and conflicts on the fine motion driving lever in fine setting screw rod inner end, regulate cavity opposite side sidewall and be provided with little spring, the inner end of little spring is supported on the fine motion driving lever.
8. level according to claim 7 is characterized in that described movement side is connected with the optoelectronic induction sheet, accordingly, is provided with the photoelectric tube of cooperation in hanging body or housings, and photoelectric tube is connected on the control circuit.
9. level according to claim 8 is characterized in that described weight part lower end snail line is connected with the damping cover, and damping cover circumference outside is equipped with the rubber anti-collision ring, is fixed with magnetic sheet in the holder on the base, carries out cutting magnetic line with the damping cover and cooperates.
10. level according to claim 9, it is characterized in that described weight part bottom surface perforate, penetrate laser head down and be plugged in the perforate, and be fastened on three no magnetic screws on the bottom surface of weight part by O type elastic ring, accordingly, have the unthreaded hole of penetrating of cooperation in damping cover bottom surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201063107U CN201007652Y (en) | 2007-02-06 | 2007-02-06 | Laser self-regulating projection line gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201063107U CN201007652Y (en) | 2007-02-06 | 2007-02-06 | Laser self-regulating projection line gauge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201007652Y true CN201007652Y (en) | 2008-01-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201063107U Expired - Lifetime CN201007652Y (en) | 2007-02-06 | 2007-02-06 | Laser self-regulating projection line gauge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201007652Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101241008B (en) * | 2007-02-06 | 2010-04-21 | 陈建军 | Laser self-adjusting demarcation device |
| CN103398703A (en) * | 2013-06-09 | 2013-11-20 | 中国十七冶集团有限公司 | Inverted image projection method |
| CN104713532A (en) * | 2015-03-10 | 2015-06-17 | 浙江新蓝达实业股份有限公司 | Laser marking instrument with automatic correcting function |
| CN111076681A (en) * | 2020-01-21 | 2020-04-28 | 国网福建省电力有限公司 | Quick check device for safety angle of pull rope and working method thereof |
-
2007
- 2007-02-06 CN CNU2007201063107U patent/CN201007652Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101241008B (en) * | 2007-02-06 | 2010-04-21 | 陈建军 | Laser self-adjusting demarcation device |
| CN103398703A (en) * | 2013-06-09 | 2013-11-20 | 中国十七冶集团有限公司 | Inverted image projection method |
| CN104713532A (en) * | 2015-03-10 | 2015-06-17 | 浙江新蓝达实业股份有限公司 | Laser marking instrument with automatic correcting function |
| CN111076681A (en) * | 2020-01-21 | 2020-04-28 | 国网福建省电力有限公司 | Quick check device for safety angle of pull rope and working method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20080116 Effective date of abandoning: 20070206 |