CN103245261B - Tape measure - Google Patents
Tape measure Download PDFInfo
- Publication number
- CN103245261B CN103245261B CN201310146208.XA CN201310146208A CN103245261B CN 103245261 B CN103245261 B CN 103245261B CN 201310146208 A CN201310146208 A CN 201310146208A CN 103245261 B CN103245261 B CN 103245261B
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- CN
- China
- Prior art keywords
- tape
- retainer
- housing
- locking bar
- connecting portion
- Prior art date
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Abstract
The invention provides a kind of tape measure, it comprises housing, in housing, be provided with drum, drum is connected with housing by disc spring, accommodate tape in housing, tape one end connects disc spring and is also wound on drum, and the other end is overhanging and be connected with chi hook through the slit being formed in lower housing portion.Wherein, tape measure comprises locking device, and locking device comprises locking bar and retainer, is connected between locking bar with retainer by connecting portion.Locking bar has operating portion in housing outer surface, and have fixed part in operating portion both sides, locking bar is fixed in housing by fixed part, and locking bar is slided on hull outside profile.Retainer comprises at the head of tape in the space between the external peripheral surface and the straight line portion of tape guide slit of the winding part of drum, and head and tape keep magnetic contact around the external peripheral surface of the winding part of drum.It is functional that tape measure provided by the invention has tape locking, and structure is simple and durability is high.
Description
Technical field
The present invention relates to a kind of tape measure, especially a kind of tape measure with locking device.
Background technology
Along with the needs of people's surveying work, tape measure is widely used, and traditional tape measure comprises a housing, and tape is contained in housing.Portion arranges a drum in the housing, and one end of tape is connected with drum by disc spring, and the other end extends to outside.This tape measure does not arrange locking device, when tape one end side of being stretched to outside housing decontrols by user, in tape and retraction housing, is not easy to user's observed reading.
Therefore, notification number is the innovation and creation that the Chinese invention patent of CN1194202C discloses " the tape locking device for tape measure " by name, and the structure of the tape measure of this disclosure of the invention as shown in Figure 1.Tape measure 1 comprises housing 10, and tape 12 is contained in housing 10.Also arrange a drum 11 in housing 10, one end of tape 12 is connected with drum 11 by disc spring, and the other end extends to the slit 13 of housing 10 bottom, is stretched to externally measured use by slit 13.Tape measure 10 also comprises a locking device, and this locking device comprises cylinder 16 and the retainer 18 that a locking bar 14, with a web member 15 is equipped with volute spring 17.Locking bar 14 is to be hinged on the top of the wall of housing 10 with the mode rotated backward forward around anchor point 141, and web member 15 is from locking bar 14 to downward-extension, and one end of cylinder 16 is fixed in the hole being formed at web member 15 bottom, and volute spring 17 is enclosed within cylinder 16.
When pulling out the tape 12 around the drum 11 be fixed in shell 10 from slit 13, between the unwound part in the tape 12 of guide slit 13 and the external peripheral surface around tape 12 part on drum 11, form a triangular open space.Now, pull out the tape 12 of Len req from slit 13 after, inserted it in triangular open space by spiral elasticity bias voltage retainer 18 when discharging locking bar 14, so that the friction force applied by retainer 18 automatically locks the tape 12 of pull-out.
But, the mode of above-mentioned this locking tape is when after the use regular hour, volute spring 17 there will be mechanical loss, cause the flexibility decrease of volute spring 17, then retainer 18 can be caused can not to insert the triangular open space of tape measure, or cause retainer 18 can not be close to external peripheral surface and tape 12 unwound part of tape 12 winding drum 11, the locking tape effect of tape measure 12 can be affected like this, bring the inconvenience of use to user.
Simultaneously, when tape 12 pull out very long work measure use need fixing time, in housing 11, the tape 12 of winding can reduce, and then causes the radius of tape 12 winding part to diminish, thus need retainer 18 more near the center of circle of tape winding, the effect of its locking tape of such guarantee.But due to web member 15 and cylinder 16 when tape measure machines with regard to regular length, so the slewing area of retainer 18 is restricted, equally can not ensure its locking effect when pulling out very long tape 12.
Summary of the invention
Fundamental purpose of the present invention is to provide the simple and tape measure that reliability that is locking is good of a kind of structure.
To achieve these goals, tape measure provided by the invention comprises housing, drum is provided with in housing, drum is connected with housing by a disc spring, tape is accommodated at housing, tape one end connects disc spring and is also wound on drum, and the other end is overhanging and be connected with chi hook through the slit being formed in lower housing portion.Wherein, tape measure also comprises locking device, and this locking device comprises locking bar and retainer, is connected between locking bar with retainer by connecting portion.Locking bar has operating portion in housing outer surface, in the operating portion both sides of locking bar, there is fixed part, locking bar is fixed in housing by fixed part, and locking bar is slided on hull outside profile, retainer comprises at the head of tape in the space between the external peripheral surface and the straight line portion of tape guide slit of the winding part of drum, and head and tape keep magnetic contact around the external peripheral surface of the winding part of drum.
From such scheme, can be formed by the material system of magnetic absorption because tape is generally steel etc., so retainer is contacted with tape coiling external peripheral surface by magnetic.When needs locking tape, operating portion is pushed along hull outside profile, operating portion is by connecting portion transmission, the retainer be connected with connecting portion take advantage of a situation the unwound part that inserts tape and around the tape part on drum external peripheral surface between formed in a triangular open space, just can be automatically locked the tape of pull-out to the friction force that tape applies by retainer.
By above-mentioned locking device, even if pull out very long tape and cause the radius of the tape of winding to reduce, retainer still can be close to tape by magnetic force, thus locking tape, and more durable by magnetic force contact Loss reducing.
Further scheme is, retainer is wedge-shaped stopper.
Therefore wedge-shaped stopper is effective in the triangular space being close to tape winding part and tape unwound part more, be conducive to the friction force improving locking tape.
Further scheme is, the head of retainer is made up of the material with high skin-friction force.
Therefore, because the head of retainer contacts with the external peripheral surface around the tape part on drum with the unwound part of tape, when needs locking tape, friction force with regard to needing the head of retainer to provide is greater than the elastic restoring force of disc spring, so the head be made by the material with high skin-friction force, this head has good friction force provides better locking effect then.
Further scheme is, the material of high skin-friction force is rubber or synthetic resin.
Therefore, adopt rubber or synthetic resin to have processing technology maturation, low cost and other advantages as the material making retainer.
Further scheme is, retainer also comprises magnet, and magnet is arranged in the head of retainer.
Therefore be provided with magnet in the head of retainer, for the magnetic contact of the winding part of retainer and tape provides magnetic force, and magnet is not easy by demagnetization, so make tape measure more durable.
Further scheme is, retainer also comprises magnetic material, and magnetic material is arranged in described head.
Therefore common magnetic material is as ferrocart core, soft magnetic ferrite or magnetic plastics etc., and magnetic material is by as one of material providing magnetic force, mating the tape measure with different materials tape equally by after magnetic by different magnetic materials.
Further scheme is, retainer overcoat has a friction member.
Therefore, the magnet that the friction member with high skin-friction force can be enclosed within head and be arranged in head or magnetic material, good locking effect can be provided for tape measure equally, and the friction member of different-thickness can be provided as required to adapt to the tape measure of different model.
Further scheme is, connecting portion comprises the first connecting portion and the second connecting portion, and it is hinged that the first connecting portion and the second connecting portion pass through joint pin.
Therefore, connect the first connecting portion and the second connecting portion by joint pin, the second connecting portion can be rotated around joint pin, be conducive to the dirigibility of raising second connecting portion, more contribute to promoting tape locking effect.
Further scheme is, the first connecting portion comprises first end and the second end, and the second connecting portion comprises the 3rd end and the 4th end, and first end is connected with locking bar, and the 4th end is connected with retainer, and the second end is connected by joint pin with the 3rd end.
Therefore connect locking bar by first end, the 4th end connects retainer, the scope of activities of retainer can be made more flexible, be conducive to the triangular space better inserting tape winding part and tape unwound part, thus improve locking tape effect.
Accompanying drawing explanation
Fig. 1 is the structural drawing of existing tape measure.
Fig. 2 is the structural drawing of tape measure first embodiment of the present invention.
Fig. 3 is tape measure first embodiment exploded view of the present invention.
Fig. 4 is tape measure first embodiment locking device left view of the present invention.
Fig. 5 is the top partial view diagram of tape measure first embodiment locking device retainer of the present invention.
Fig. 6 is tape measure second embodiment locking device left view of the present invention.
Fig. 7 is the structural drawing of tape measure first embodiment lock-out state of the present invention.
Below in conjunction with drawings and Examples, the invention will be further described.
Embodiment
First embodiment:
With reference to the structural drawing that Fig. 2 and Fig. 3, Fig. 2 are tape measure first embodiments of the present invention, Fig. 3 is tape measure first embodiment exploded view of the present invention, sets forth the present embodiment below in conjunction with Fig. 2 and Fig. 3.Tape measure 2 comprises housing 21, and housing 21 comprises left end cap 211, right end cap 212 and pad 215, and pad 215 is arranged on the bottom of housing 21, and is formed with left end cap 211, right end cap 212 with slit 216.Above the slit 216 of housing 21, also offer a dead slot 213, this dead slot 213 is surrounded by housing 21 outer wall and inwall 214.
A reel 28 is provided with in housing 21, the disc spring 25 be connected with drum 23 is placed with in reel 28, tape 22 is also provided with in housing 21, one end of tape 22 connects disc spring 25 and coiling is in reel 28 centered by drum, and it is overhanging and be connected with chi hook 221 that the other end is passed in the slit 216 of lower housing portion.
Wherein, tape measure also comprises locking device, is tape measure first embodiment locking device left view of the present invention with reference to Fig. 4, Fig. 4.This locking device comprises locking bar 24, retainer 26 and connecting portion 27.Locking bar 24 comprises operating portion 241 and fixed part 242, operating portion 241 is positioned on the outside surface of housing 21, fixed part 242 is positioned at the both sides of operating portion 241, fixed part 242 is arranged on the inner side of the inwall 214 of housing 21, operating portion 241 is arranged in the dead slot 213 outside inwall 214, and locking bar can the profile outside housing 21 be slided up and down along inwall 214.
Retainer 26 comprises head 261 and magnet 262, this head 261 is arranged in tape 22 in the space between the external peripheral surface and the straight line portion of tape 22 guide slit 216 of the winding part of drum 23, head 261 is by the material with high skin-friction force, as the wedge-shaped stopper that rubber etc. is made, in head 261, be also provided with a magnet 262.Because tape 22 is generally steel tape, so head 261 can by the impact being arranged on its internal magnets 262 and producing magnetic force, head 261 and tape 22 keep magnetic contact around the external peripheral surface of the winding part of drum 23.
Connecting portion 27 comprises the first connecting portion, second connecting portion and joint pin 275, first connecting portion comprises first end 271 and the second end 272, second connecting portion comprises the 3rd end 273 and the 4th end 274, first end 271 is connected with locking bar 24, 4th end 274 is connected with retainer 26, as shown in Figure 5, the second end 272 has two coaxial through-holes in its end, 3rd end 273 offers a through hole at its end tool, joint pin 275 inserts and runs through above-mentioned three through holes, the second end 272 and the 3rd end 273 is connected by joint pin 275, retainer 26 can be rotated around joint pin 275.
When user needs to measure measured object, locking bar 24 is pushed into non-locked position as shown in Figure 2, retainer 26 is not contacted with the straight line portion of tape 22 in housing, thus chi hook 221 can be caught swimmingly and extract tape 22 out and measure.
After user extracts the tape 22 of certain length out, after withdrawing the external force pulling tape 22, locking bar 22 will arrive latched position downwards automatically along inwall 214 as shown in Figure 7, because retainer 26 and tape 22 keep magnetic contact around the external peripheral surface of the winding part of drum 23, so the recovery of tape 22 can drive retainer 26 can insert tape 22 swimmingly in the space between the external peripheral surface and the straight line portion of tape 22 guide slit 216 of the winding part of drum 23.Wedge-shaped stopper 26 is made by the material with high skin-friction force simultaneously, forms certain friction force, because this friction force is greater than the elastic restoring force of disc spring, thus tape 22 locked between retainer head 261 and tape 22.Even if user pulls out very long tape for measurement, the radius of tape 22 winding part in housing 21 is caused to diminish, but because retainer 26 and tape 22 keep magnetic contact around the external peripheral surface of the winding part of drum 23, retainer 26 still can be close to tape 22, for locking tape provides enough friction force.
When user needs tape 22 to regain, locking bar 24 is upwards back into non-locked position along inwall 214, retainer 26 is withdrawn into the position do not contacted with the straight line portion of tape 22 in housing by locking bar 24, now do not have friction force between retainer 26 and tape 22, tape 22 is recovered in housing under the elastic restoring force effect of disc spring.
Second embodiment:
Above-mentioned tape measure first embodiment is a preferred embodiment of the present invention, and wherein, the locking device in above-mentioned tape measure first embodiment can also be replaced with locking device 6 as shown in Figure 6, locking device 6 comprises locking bar 61, retainer 62 and connecting portion 63.Locking bar 61 comprises operating portion 611 and fixed part 612, operating portion 611 is positioned on the outside surface of tape measure housing, fixed part 612 is positioned at the both sides of operating portion 611, fixed part 612 is arranged on the inner side of inner walls, operating portion 611 is arranged in the dead slot outside inner walls, and locking bar 611 can be slided up and down along inner walls.
Retainer 62 comprises head 621 and magnet 622, this head 621 is arranged in tape in the space between the external peripheral surface and the straight line portion of tape guide slit of the winding part of drum, head 621 is the wedge-shaped stopper be made by the material with high skin-friction force, a magnet 622 is also provided with in head 621, because tape is generally steel tape, so head 621 can by the impact being arranged on its internal magnets 622 and producing magnetic force, head 621 and tape keep magnetic contact around the external peripheral surface of the winding part of drum.
Locking bar 61 is connected by connecting portion 63 with retainer 62.Same, after user extracts the tape of certain length out, after withdrawing the external force pulling tape, locking bar 61 will along inwall downward rewinding latched position automatically, retainer 62 is driven by the recovery of tape, retainer 62 can insert tape equally swimmingly in the space between the external peripheral surface and the straight line portion of tape guide slit of the winding part of drum, and the friction force produced between retainer and tape is greater than the elastic restoring force of disc spring, thus locks tape.
Preferably, put a friction member 623 outside retainer 62, friction member 623 can be made by the material with high skin-friction force, as rubber or synthetic resin etc.Like this, the friction force between retainer 62 and tape more, is more conducive to tape to lock.Friction member 623 is equally applicable to the retainer of locking device in above-mentioned tape measure first embodiment, and friction member 623 is put retainer can be used.
By above-described embodiment, provide the simple and tape measure that reliability that is locking is good of structure, being effectively raised the locking performance of tape measure by the locking device in tape measure, even if extract very long tape out for measuring, its locking effect can be ensured equally.
Finally it is emphasized that; the present invention is not limited to above-mentioned embodiment; as adopted other magnetic materials that can produce magnetic force as ferrocart core, soft magnetic ferrite or magnetic plastics etc. at retainer head; after magnetic is subject to magnetic material; all can realize retainer and tape winding part keeps magnetic contact, these all should be included in the protection domain of the claims in the present invention.
Claims (7)
1. tape measure, comprises
Housing;
To be arranged in described housing and the drum be connected by a disc spring with described housing;
Tape, is contained in described housing, and one end of described tape connects described disc spring and is wound on described drum, and the other end is overhanging and be connected with chi hook through the slit being formed in described lower housing portion;
It is characterized in that:
Locking device, comprise locking bar and retainer, be connected by connecting portion between described locking bar with described retainer, described locking bar, comprise and be positioned at operating portion in described housing outer surface and fixed part, described locking bar, in described operating portion both sides, is fixed in described housing by described fixed position, and described locking bar is slided on described hull outside profile;
Described retainer comprise described tape around the external peripheral surface of the winding part of described drum and described tape lead described slit straight line portion between space in head, described head is provided with magnetic material, and described head and described external peripheral surface keep magnetic contact.
2. tape measure according to claim 1, is characterized in that:
Described retainer is wedge-shaped stopper.
3. tape measure according to claim 2, is characterized in that:
The described head of described retainer is made up of the material with high skin-friction force.
4. tape measure according to claim 3, is characterized in that:
The material of described high skin-friction force is rubber or synthetic resin.
5. the tape measure according to any one of Claims 1-4, is characterized in that:
Described retainer overcoat has a friction member.
6. the tape measure according to any one of Claims 1-4, is characterized in that:
Described connecting portion comprises the first connecting portion and the second connecting portion, and described first connecting portion and described second connecting portion are hinged by joint pin.
7. tape measure according to claim 6, is characterized in that:
Described first connecting portion comprises first end and the second end, described second connecting portion comprises the 3rd end and the 4th end, described first end is connected with described locking bar, and described 4th end is connected with described retainer, and described the second end is connected by described joint pin with described 3rd end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310146208.XA CN103245261B (en) | 2013-04-24 | 2013-04-24 | Tape measure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310146208.XA CN103245261B (en) | 2013-04-24 | 2013-04-24 | Tape measure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103245261A CN103245261A (en) | 2013-08-14 |
| CN103245261B true CN103245261B (en) | 2016-01-20 |
Family
ID=48924948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310146208.XA Expired - Fee Related CN103245261B (en) | 2013-04-24 | 2013-04-24 | Tape measure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103245261B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103615944B (en) * | 2013-11-19 | 2016-04-13 | 京东方科技集团股份有限公司 | A kind of ruler |
| CN107388914A (en) * | 2017-08-02 | 2017-11-24 | 王振兴 | digital tape measure |
| CN107960794A (en) * | 2017-12-25 | 2018-04-27 | 昆明理工大学 | A kind of Moveable telescopic bedroom stretches window-blind |
| CN108955443B (en) * | 2018-07-10 | 2024-03-19 | 宁波长城精工实业有限公司 | Reinforced locking structure of tape measure |
| US11517103B2 (en) * | 2018-11-19 | 2022-12-06 | Jun Young Choi | Belt holder for tape measure |
| JP2020020812A (en) * | 2019-11-01 | 2020-02-06 | 原度器株式会社 | Tape measure with spring fixing shaft of spring for winding measuring tape |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1435673A (en) * | 2002-01-29 | 2003-08-13 | 卡梅隆株式会社 | Tape locking device for tape measure |
| CN101082476A (en) * | 2007-06-19 | 2007-12-05 | 珠海友博精密工业有限公司 | Band tape |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4848167B2 (en) * | 2005-10-13 | 2011-12-28 | ムラテックＫｄｓ株式会社 | Tape measure |
| US20090307920A1 (en) * | 2008-06-13 | 2009-12-17 | Sidney Louis Schrage | Tape measure |
-
2013
- 2013-04-24 CN CN201310146208.XA patent/CN103245261B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1435673A (en) * | 2002-01-29 | 2003-08-13 | 卡梅隆株式会社 | Tape locking device for tape measure |
| CN101082476A (en) * | 2007-06-19 | 2007-12-05 | 珠海友博精密工业有限公司 | Band tape |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103245261A (en) | 2013-08-14 |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160120 Termination date: 20170424 |