CN101082476A - Band tape - Google Patents
Band tape Download PDFInfo
- Publication number
- CN101082476A CN101082476A CN 200710028809 CN200710028809A CN101082476A CN 101082476 A CN101082476 A CN 101082476A CN 200710028809 CN200710028809 CN 200710028809 CN 200710028809 A CN200710028809 A CN 200710028809A CN 101082476 A CN101082476 A CN 101082476A
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- Prior art keywords
- housing
- connecting link
- tooth
- moving tooth
- cooperates
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Abstract
This invention provides a sort of tape, it includes that: The shell, the tub wheel fitted in the shell, the rule belt that one end of it connects with the tub wheel, as well as convolutes the tub wheel. The check part, the heel of it has a runner and there has the spring behind the pole body. A driver fixed in the bosom of the bilateral wall of the shell, and the driver partially put out the shell at least. There have the meshing gear and the dialing gear in the shell, one side of the dialing gear has no hindrance. A driven wheel fixed in the bosom of the bilateral wall, it has the dialing gear and the meshing gear which joggles with the meshing gear, one side of the dialing gear has no hindrance. A connecting link, one end of it has the pin roll, and there has a spring between the shell and another end of the connecting link, its middle part has the limitation part. The face which compare to the driver and the driven wheel has the weighted part, and the constraint part which fixes in the shell in this invention and limits the movement of the connecting link in this invention. The tape in this invention locks the rule belt automatically, and unblocks expediently, and the operation of the deblocking is convenient.
Description
Technical field
The present invention relates to a kind of tape measure, especially a kind of tape measure with locking mechanism.
Background technology
Along with the needs that are convenient for people to surveying work, be widely used to using the various easily designs of tape measure.For being convenient for measuring and reading, people like using the tape measure that has lock function when measuring, and the chi band in this tape measure is drawn out behind the housing can be by locking mechanism locking, in the housing of can not withdrawing under released state not.
The CN1194202C patent of invention has just been announced the innovation and creation that name is called the tape measure locking device that is used for tape measure, its embodiment that provides as shown in Figure 1, tape measure comprises a housing 10, one chi band, 12 1 ends are around having on the disc spring drum 11, the other end of chi band 12 is connected with a chi hook 13, and extends to the outside of housing 10 by slit 20.Also be provided with a locking bar 14 on housing 10, locking bar 14 is connected with an end of retainer 18 bodies of rod by web member 15, spring pad 16, and the head of retainer 18 selectively inserts or withdraw from the excircle of winding part of chi band 12 and the intersection of straight line portion.On the body of rod of retainer 18, also be with volute spring 17, apply elastic force with head to retainer 18.
When the user pulls out housing 10 with chi band 12, the head of retainer 18 is at the effect lower compression volute spring 17 of both sides chi band up and down and contract behind the web members 15 relatively, pull out the action stop after, the head that volute spring 17 just promotes retainer 18 inserts it into the excircle of the chi roll coil of strip 12 winding parts and the intersection of straight line portion, frictionally overcomes the restoring force of disc spring in the drum 11, and with 12 lockings of chi band.When the user need regain the sponson of chi band 12, press locking bar 14 along Fig. 1 direction of arrow, remove locking to chi band 12, it is just withdrawn under the effect of disc spring restoring force in the housing 10 automatically.Its releasing process is: when the user presses locking bar 14, locking bar 14 just moves to the direction of housing 10 by the body of rod that web member 15 drives retainer 18, thereby the head that makes retainer 18 leaves chi band 12, and drum 11 is just regained chi band 12 by the disc spring restoring force with reeling.But this scheme does not illustrate locking bar 14 and shows from Fig. 1 how the dot-and-dash line position is got back to solid line and shown the position, promptly this scheme lacks necessary structure, locking has problem once more, in addition, because web member 15 is the parts of a vertical bar shaped, move more distance to the direction near housing 10 after pressing locking bar 14, this takies space bigger in the housing 10, is unfavorable for the miniaturization of tape measure.And the user realizes regaining chi band 12 by the mode of pressing locking bar 14, if the user picks up the tape measure mistiming and presses locking press button, it is locking bar 14, chi band 12 is just withdrawn in the housing 10 immediately, and the user just can't see the data of measurement, brings great inconvenience to the user.Simultaneously, this locking device can only be regained chi band 12 in a kind of mode of pressing locking bar 14, brings some inconvenience also for user's operation.
Summary of the invention
Fundamental purpose of the present invention provides a kind of locking and the reliable tape measure of release;
Another object of the present invention provides a kind of locking mechanism less tape measure that takes up room;
A further object of the present invention provides a kind of easy to operate its allows the user be difficult for the tape measure that mistake is pressed locking press button.
For realizing above-mentioned purpose, tape measure provided by the invention comprises the housing that holds the chi band; The drum that is arranged in the housing and is connected by a disc spring with housing; Chi band, its first end connect also and are wound on the drum, and it is overhanging and be connected with the chi hook that second end passes the slit that is formed on lower housing portion; Retainer, its head insert or withdraw from the intersection of chi tape wrapping part excircle and chi band straight line portion selectively, and its body of rod rear portion has a chute, and are furnished with behind the body of rod and force the retainer head to insert the spring 17 of described intersection; And comprise and a driving wheel be fixed between the housing two side by rotating shaft, at least a portion is stretched out housing, and the part that is positioned at housing is provided with engaging tooth 31 and moving tooth 32, and moving tooth 32 1 sides are without hindrance 33; One engaged wheel is fixed between the housing two side by rotating shaft, has the engaging tooth 34 and the moving tooth 35 that mesh with driving wheel engaging tooth 31, and moving tooth 35 1 sides are without hindrance 36; And a connecting link, the one end cooperates by the chute of bearing pin with described retainer body of rod rear portion; Be equipped with a spring 25 between its other end and housing; Its middle part is provided with the restrictions that is subjected to the housing restriction and only moves along axis direction; It is provided with forced section 43,45 that cooperates with moving tooth 32 and the forced section 44,46 that cooperates with moving tooth 35 with driving wheel, a face that engaged wheel is relative; Be fixed on the described housing to limit the attaching means of described connecting link motion.
By above scheme as seen, after the chi band was drawn out housing, the head of retainer can be inserted into the intersection of chi tape wrapping part excircle and straight line portion, and relied on friction force that chi is with lock fixed.When the user stirred driving wheel simultaneously, moving tooth 32 or moving tooth 35 can drive connecting link and upwards slide, and made retainer to the direction motion near housing, thereby made the head of retainer separate from the chi band, and the chi band is withdrawn under the effect of disc spring in the housing.So tape measure provided by the invention can effectively lock the chi band, and release reliably.
A concrete scheme is, forced section 43 is the straight-tooth that cooperates with moving tooth 32, and forced section 44 is the straight-tooth that cooperates with moving tooth 35, and the axis of connecting link is circular arc line, and promptly connecting link is a circular shape.Like this, when the user stirs driving wheel, connecting link will upwards slide, and its end that is connected with retainer also is upwards to slide, rather than to the direction motion near housing.Simultaneously because the space that connecting link occupies when sliding is less, so the space that locking mechanism occupies diminishes, and helps the miniaturization of tape measure.
Simultaneously, the user can regain the chi band by stir driving wheel with counterclockwise or clockwise direction, so not only make things convenient for the user to operate, and can avoid user's mistake to press locking press button and situation that the chi band is regained.
Description of drawings
Fig. 1 is existing tape measure structural representation;
Fig. 2 is the structural representation of first embodiment of the invention;
Fig. 3 is the synoptic diagram of first user mode of first embodiment of the invention;
Fig. 4 is the synoptic diagram of second user mode of first embodiment of the invention;
Fig. 5 is the structural representation of second embodiment of the invention;
Fig. 6 is the structural representation of another embodiment of connecting link among the present invention;
Fig. 7 is the structural representation of the another embodiment of connecting link among the present invention;
Fig. 8 is the connecting link structural representation of an embodiment again among the present invention.
The invention will be further described below in conjunction with drawings and Examples.
Embodiment
Referring to Fig. 2, be the structural representation of first embodiment of the invention.In the present embodiment, be provided with the drum 11 of a built-in disc spring in the housing 10 of tape measure, an end of chi band 12 is connected and is wound on the drum 11, and second end is connected with chi hook 13, and extends to the outside of housing 10 by slit 20.Slit 20 is positioned at the bottom of housing 10, and the restoring force of disc spring makes chi band 12 have the trend of withdrawal housing 10.
On the top of tape measure, be provided with a pair of intermeshing driven wheel of tooth that passes through, wherein the rotating shaft of driving wheel 22 is fixed between two sidewalls of housing 10, and at least a portion is stretched out housing 10.Part and peripheral part that driving wheel 22 is positioned at housing 10 outsides are provided with the lines of the hand, make things convenient for the user to stir driving wheel 22 around its rotating shaft rotation.And being positioned at the part of housing 10, driving wheel 22 is provided with engaging tooth 31 and moving tooth 32.In the present embodiment, it is without hindrance 33 between the engaging tooth 31 of driving wheel 22 and the moving tooth 32, so that driving wheel can cooperate with connecting link 24.Engaged wheel 23 also is to be fixed between the two side of housing 10 by rotating shaft, and has engaging tooth 34 and moving tooth 35 with engaging tooth 31 engagement of driving wheel 22, and is without hindrance 36 between engaging tooth 34 and the moving tooth 35.
On driving wheel 22 and the engaged wheel 23 close directions of drum 11, be provided with the connecting link 24 of a bending.Connecting link 24 is provided with forced section that cooperates with moving tooth 32 respectively and the forced section that cooperates with moving tooth 35 with driving wheel 22 and engaged wheel 23 facing surfaces.In the present embodiment, the forced section that cooperates with moving tooth 32 is a straight-tooth 43, and the forced section that cooperates with moving tooth 35 is a straight-tooth 44.End at connecting link 24 also is provided with a spring 25.One end of spring 25 is fixed on the inwall of housing 10, the other end and connecting link 24 1 end in contact, and apply an elastic force to connecting link 24.Simultaneously, along also being provided with restrictions on the axis direction, promptly groove 51 at connecting link 24 middle parts, and groove 51 can cooperate with the attaching means on being fixed on housing 10 inwalls.In the present embodiment, attaching means is a pin 52.The slip that can limit connecting link 24 that cooperates of groove 51 and pin 52 is slided connecting link 24 on projected path.And, on the inwall of housing 10, also be fixed with rib 26,27 and 28, be used for further limiting the sliding trace of connecting link 24.Certainly, groove 51 can exchange with pin 52, promptly groove 51 as attaching means, and be fixed on the housing 10, and will sell 52, and be arranged on the connecting link 24 as restrictions, also can obtain identical effect.
What be connected with the other end of connecting link 24 is a retainer 18, and the rear portion of retainer 18 bodies of rod is provided with a chute 53, and chute 53 can cooperate with the bearing pin 54 on the connecting link 24.When connecting link 24 during, can promote retainers 18 by bearing pin 54 to lower slider.The other end of retainer 18 is its head, is a wedge-shaped member of being made by materials such as rubber, selectively inserts or withdraws from the excircle of chi band 12 winding parts and the intersection of straight line portion, and can apply friction force to chi band 12, locking chi band 12.On the body of rod of retainer 18, also be with a spring 17, one end in contact of one end and connecting link 24, the other end contacts with the head of retainer 18, and apply an elastic force to the head of retainer 18, can force the head of retainer 18 to insert the excircle of chi band 12 winding parts and the intersection of straight line portion.
Direction pulling chi hook 13 when the user edge away from housing 10, chi band 12 discharges from housing 10.At this moment, spring 17 promotes retainer 18 and moves to chi band 12 directions, and be inserted into intersection between chi band 12 winding part excircles and the straight line portion, when the friction force between retainer 18 and the chi band 12 spurs the power of chi hook 13 greater than the user, chi band 12 is just automatically locked, and the user just can check the numerical value of scale to determine to measure on the chi band 12.
When the user need regain the chi band, stir driving wheel and get final product.As shown in Figure 3, be the synoptic diagram of first user mode of first embodiment of the invention.When the user stretched out part housing 10 outside counterclockwise to stir driving wheel 22, shown in the double-lined arrow among the figure, driving wheel 22 was with rotation counterclockwise.At this moment, the moving tooth 32 of driving wheel 22 moves upward, and by straight-tooth 43 connecting link 24 is upwards slided.When connecting link 24 upwards slides, removed the constraint of 54 pairs of retainers of bearing pin, in the housing 10 of then withdrawing automatically under the effect of the disc spring of chi band 12 in drum 11, and be wound on the drum 11.After the user unclamped driving wheel 22, connecting link 24 is reverse slide under the elastic force effect of spring 25, and recovered original lock-out state.Simultaneously, under the drive of straight-tooth 43, driving wheel 22, engaged wheel 23 all return to initial position, wait for user's operation next time.
When counterclockwise stirring driving wheel 22, under the effect of the engaging tooth 31 of driving wheel 22 and the engaging tooth 34 of engaged wheel, engaged wheel 23 will rotate in a clockwise direction the user.But owing to be without hindrance 36 between the engaging tooth 34 of engaged wheel 23 and the moving tooth 35, when engaged wheel 23 clockwise rotated, what the straight-tooth 44 on the connecting link 24 was faced was without hindrance 36, can not cause obstruction to the slip of connecting link 24 like this.
Certainly, the user not necessarily need also can stir driving wheel 22 in a clockwise direction counterclockwise to stir driving wheel 22.As shown in Figure 4, be the synoptic diagram of first embodiment of the invention second user mode.Shown in double-lined arrow direction among the figure, when the user stirred driving wheel 22 in a clockwise direction, engaged wheel 23 will be counterclockwise to rotate.At this moment, the moving tooth 35 of engaged wheel 23 cooperates with the straight-tooth 44 of connecting link 24, and moves upward and drive connecting link 24 and upwards slide by driving straight-tooth 44.Simultaneously, because between the engaging tooth 31 of driving wheel 22 and the moving tooth 32 is without hindrance 33, the straight-tooth 43 of connecting link 24 is in the face of without hindrance 33, can not cause obstruction to the slip of connecting link 24 yet, make its slip that can successfully make progress, remove the constraint of 54 pairs of retainers 18 of bearing pin, thereby make in the chi band 12 automatic withdrawal housings 10.
Referring to Fig. 5, be the structural representation of second embodiment of the invention.Different with first embodiment is, engaged wheel 23 is arranged on the below of driving wheel 22 in the present embodiment, and its effect and first embodiment are identical.Identical with first embodiment is, driving wheel 22 also is that the moving tooth 32 of driving wheel 22 cooperates with the straight-tooth 43 of connecting link 24 by engaging tooth 34 engagements of engaging tooth 31 with engaged wheel 23, and the moving tooth 35 of engaged wheel 23 cooperates with the straight-tooth 44 of connecting link 24.Be provided with without hindrance 33 at driving wheel 22 moving teeth 32 near a side of straight-tooth 43, be provided with without hindrance 36 near a side of straight-tooth 44 at engaged wheel 23 moving teeth 35, so as with the cooperating of connecting link 24.No matter the user stirs driving wheel 22 with counter clockwise direction or clockwise direction, connecting link 24 all can upwards slide, and in the chi band 12 regracting housings 10, its principle of work is identical with aforesaid first embodiment, does not repeat them here.
Certainly, the forced section of tape measure of the present invention differs and is decided to be straight-tooth, also can be other structure.Referring to Fig. 6, Fig. 6 has disclosed the structure of another embodiment of connecting link of tape measure of the present invention.In the present embodiment, the forced section of connecting link 24 is 2 grooves 45 and 46 that are arranged near the surface of housing, at 47 engaging tooths that are used to hold engaged wheel of connecting link 24 lip-deep grooves.After the tape measure assembling finished, the moving tooth of driving wheel can be inserted in the groove 45, and the moving tooth of engaged wheel can insert in the groove 46.When the user stirred driving wheel with counter clockwise direction, the coboundary that the moving tooth of driving wheel will promote groove 45 upwards slided connecting link 24; When the user stirred driving wheel in a clockwise direction, the coboundary that the moving tooth of engaged wheel will promote groove 46 upwards slided connecting link 24.Its course of work is identical with aforesaid embodiment, all can allow in the chi band withdrawal housing.
Simultaneously, the shape that can also be arranged to vertical bar of the connecting link of tape measure of the present invention, as shown in Figure 7 and Figure 8, Fig. 7, Fig. 8 are respectively the structural representations of the other two kinds of embodiments of the connecting link of tape measure of the present invention.Among Fig. 7, also be to be provided with straight- tooth 43,44 on the surface of connecting link 24, cooperate with the moving tooth of engaged wheel with the moving tooth of driving wheel respectively so that connecting link upwards slides; The surface of the connecting link 24 among Fig. 8 is provided with groove 45,46 and 47, cooperates with driving wheel and engaged wheel respectively.Different with aforesaid connecting link 24 is, Fig. 7 and connecting link 24 shown in Figure 8 are the vertical bar shape, and promptly its axis is a straight line, after the user stirred driving wheel, connecting link 24 moved up, and drove the motion of retainer, its principle of work is identical with aforesaid first embodiment, does not repeat them here.
From above-mentioned embodiment as seen, tape measure provided by the invention is after the user pulls out housing with the chi band, and retainer can automatically lock the chi band, and the chi band is difficult for making things convenient for the user to check measurement data in the withdrawal housing.And in the foregoing embodiments, the axis of connecting link is a circular arc, and its direction of motion is for sliding up and down, and it is less to occupy the space, helps the miniaturization of tape measure.Simultaneously, the locking control part of tape measure of the present invention is a driving wheel, and the user need be with counterclockwise or clockwise direction rotary driving wheel, even the user presses driving wheel, the chi band can not withdrawn in the housing yet, avoid user's mistake by and the situation that causes the chi band at once to withdraw.And the driving wheel of tape measure of the present invention can counterclockwise or clockwise rotate, and the user satisfies the people of different use habits with all recoverable chi band of either direction rotary driving wheel, also makes things convenient for user's operation.
In the foregoing description, the end that connecting link is connected with retainer is provided with bearing pin, and the body of rod of retainer is provided with the chute that cooperates with this bearing pin.In actual application of the present invention, chute can be set on connecting link, and bearing pin is set on the body of rod of retainer, also can realize identical effect.If also be arranged to circular arc line with the axis of connecting link this moment, promptly connecting link is a circular shape, and this will help the miniaturization of tape measure.
In addition, in the tape measure of the present invention, the center of driving wheel and the center of engaged wheel can the axle ways of connecting be fixed on the housing, and the mode that also can lead to ball is fixed on the housing, and the rotation of driving wheel and engaged wheel is more smooth and easy like this.
At last; it is emphasized that; the invention is not restricted to above-mentioned embodiment, the small variations such as change of connected mode of change, connecting link and retainer that change, the connecting link surface configuration of position are set as driving wheel and engaged wheel also should be included within the claim protection domain of the present invention.
Claims (10)
1, tape measure comprises
The housing that holds the chi band;
The drum that is arranged in the housing and is connected by a disc spring with housing;
Chi band, its first end connect also and are wound on the drum, and it is overhanging and be connected with the chi hook that second end passes the slit that is formed on lower housing portion;
Retainer, its head insert or withdraw from the intersection of chi tape wrapping part excircle and chi band straight line portion selectively, and its body of rod rear portion has a chute, and are furnished with behind the body of rod and force the retainer head to insert the spring (17) of described intersection;
It is characterized in that:
One driving wheel is fixed between the housing two side by rotating shaft, and at least a portion is stretched out housing, and the part that is positioned at housing is provided with engaging tooth (31) and moving tooth (32), and moving tooth (32) one sides are without hindrance (33);
One engaged wheel is fixed between the housing two side by rotating shaft, has the engaging tooth (34) and the moving tooth (35) that mesh with driving wheel engaging tooth (31), and moving tooth (35) one sides are without hindrance (36);
One connecting link,
The one end cooperates by the chute of bearing pin with described retainer body of rod rear portion;
Be equipped with a spring (25) between its other end and housing;
Its middle part is provided with the restrictions that is subjected to the housing restriction and only moves along axis direction;
It is provided with forced section (43,45) that cooperates with moving tooth (32) and the forced section (44,46) that cooperates with moving tooth (35) with driving wheel, a face that engaged wheel is relative;
Be fixed on the described housing to limit the attaching means of described connecting link motion.
2, tape measure according to claim 1,
It is characterized in that:
Described without hindrance (33) are positioned near forced section (43, a 45) side;
Described without hindrance (36) are positioned near forced section (44, a 46) side.
3, tape measure according to claim 1,
It is characterized in that:
Described restrictions is for being located at described web member axis upper groove;
Described attaching means is the pin with described groove fit.
4, tape measure according to claim 1,
It is characterized in that:
Described restrictions is the pin that is located on the described web member;
Described attaching means is the groove that cooperates with described pin.
5, tape measure according to claim 1,
It is characterized in that:
Described forced section (43) is the straight-tooth that cooperates with moving tooth (32);
Described forced section (44) is the straight-tooth that cooperates with moving tooth (35).
6, tape measure according to claim 1,
It is characterized in that:
Described forced section (45) is the groove that cooperates with moving tooth (32);
Described forced section (46) is the groove that cooperates with moving tooth (35).
7, according to each described tape measure of claim 1 to 4,
It is characterized in that:
The axis of described connecting link is a circular arc line.
8, according to each described tape measure of claim 1 to 4,
It is characterized in that:
The axis of described connecting link is a straight line.
9, tape measure comprises
The housing that holds the chi band;
The drum that is arranged in the housing and is connected by a disc spring with housing;
Chi band, its first end connect also and are wound on the drum, and it is overhanging and be connected with the chi hook that second end passes the slit that is formed on lower housing portion;
Retainer, its head insert or withdraw from the intersection of chi tape wrapping part excircle and chi band straight line portion selectively, and its body of rod rear portion has a bearing pin, and body of rod rear portion is equipped with and forces the retainer head to insert the spring (17) of described intersection;
It is characterized in that:
One driving wheel is fixed between the housing two side by rotating shaft, and at least a portion is stretched out housing, and the part that is positioned at housing is provided with engaging tooth (31) and moving tooth (32), and moving tooth (32) one sides are without hindrance (33);
One engaged wheel is fixed between the housing two side by rotating shaft, has the engaging tooth (34) and the moving tooth (35) that mesh with driving wheel engaging tooth (31), and moving tooth (35) one sides are without hindrance (36);
One connecting link,
The one end cooperates by the bearing pin of chute with described retainer body of rod rear portion;
Be equipped with a spring (25) between its other end and housing;
Its middle part is provided with the restrictions that is subjected to the housing restriction and only moves along axis direction;
It is provided with forced section (43,45) that cooperates with moving tooth (32) and the forced section (44,46) that cooperates with moving tooth (35) with driving wheel, a face that engaged wheel is relative;
Be fixed on the described housing to limit the attaching means of described connecting link motion.
10, tape measure according to claim 9,
It is characterized in that:
The axis of described connecting link is a circular arc line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710028809 CN101082476A (en) | 2007-06-19 | 2007-06-19 | Band tape |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710028809 CN101082476A (en) | 2007-06-19 | 2007-06-19 | Band tape |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101082476A true CN101082476A (en) | 2007-12-05 |
Family
ID=38912167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710028809 Pending CN101082476A (en) | 2007-06-19 | 2007-06-19 | Band tape |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101082476A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245261A (en) * | 2013-04-24 | 2013-08-14 | 珠海友博精密工业有限公司 | Tape |
| CN111562411A (en) * | 2020-06-17 | 2020-08-21 | 国网山东省电力公司莱阳市供电公司 | Special current loop cross-over connection instrument for electric power operation and inspection |
| WO2021239011A1 (en) * | 2020-05-26 | 2021-12-02 | 宁波宏迪尺业有限公司 | Tape measure with safety braking |
-
2007
- 2007-06-19 CN CN 200710028809 patent/CN101082476A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245261A (en) * | 2013-04-24 | 2013-08-14 | 珠海友博精密工业有限公司 | Tape |
| CN103245261B (en) * | 2013-04-24 | 2016-01-20 | 珠海友博精密工业有限公司 | Tape measure |
| WO2021239011A1 (en) * | 2020-05-26 | 2021-12-02 | 宁波宏迪尺业有限公司 | Tape measure with safety braking |
| CN111562411A (en) * | 2020-06-17 | 2020-08-21 | 国网山东省电力公司莱阳市供电公司 | Special current loop cross-over connection instrument for electric power operation and inspection |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20071205 |