DE2838968A1 - Depth gauge for electric hammer drill - uses light beam reflected onto photoelectric cell from surface being drilled - Google Patents
Depth gauge for electric hammer drill - uses light beam reflected onto photoelectric cell from surface being drilledInfo
- Publication number
- DE2838968A1 DE2838968A1 DE19782838968 DE2838968A DE2838968A1 DE 2838968 A1 DE2838968 A1 DE 2838968A1 DE 19782838968 DE19782838968 DE 19782838968 DE 2838968 A DE2838968 A DE 2838968A DE 2838968 A1 DE2838968 A1 DE 2838968A1
- Authority
- DE
- Germany
- Prior art keywords
- power tool
- tool according
- drilling
- drill
- receiver
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/003—Stops for limiting depth in rotary hand tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B49/00—Measuring or gauging equipment on boring machines for positioning or guiding the drill; Devices for indicating failure of drills during boring; Centering devices for holes to be bored
- B23B49/003—Stops attached to drilling tools, tool holders or drilling machines
- B23B49/006—Attached to drilling machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
- B25H1/00—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby
- B25H1/0021—Stands, supports or guiding devices for positioning portable tools or for securing them to the work
- B25H1/0078—Guiding devices for hand tools
- B25H1/0092—Guiding devices for hand tools by optical means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2260/00—Details of constructional elements
- B23B2260/092—Lasers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2270/00—Details of turning, boring or drilling machines, processes or tools not otherwise provided for
- B23B2270/32—Use of electronics
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling And Boring (AREA)
Abstract
Description
Elektrowerkzeug zum Bohren, Schlagbohren und HammerbohrenPower tool for drilling, hammer drilling and hammer drilling
Das Bearbeiten von Werkstücken aller Art sowie von Stein-und Betonwänden mittels für die Arbeitsgänge Bohren, Schlagbohren oder Hammerbohren konzipierten Elektrowerkzeugen ist stets in irgendeiner Form mit dem Problem verknüpft, Bohrungen von wenigstens einigermaßen genau definierter Tiefe einzubringen. Zu diesem Zweck werden, soweit die Voraussetzungen hierfür vorliegen, mechanische Tiefenanschläge in Form von Längsstäben verwendet, die in der Regel in einem am Hals des infrage kommenden Elektrowerkzeugs anbringbaren Handgriff längsverschiebbar gehaltert sind.Processing of all kinds of workpieces as well as stone and concrete walls means designed for the operations of drilling, hammer drilling or hammer drilling Power tools is always linked in some way with the problem, drilling to be introduced from at least somewhat precisely defined depth. To this end mechanical depth stops are used, provided that the prerequisites for this are met used in the form of longitudinal bars, usually in one at the neck of the in question Coming power tool attachable handle are held longitudinally displaceable.
Derartige Tiefenanschläge sind unter Berücksichtigung der infrage kommenden Bohrerlängen verhältnismäßig sehr lang zu bemessen und daher sperrig und häufig störend Außerdem besteht die Gefahr, daß sich die Spannschraube für den betreffenden Tiefenanschlag infolge von Vibrationen des Blektrowerkzeugs lockert, so daß sich der Tiefenanschlag bein Auftreffen auf das Werkstück unter Umständen unmerklich nach rückwärts verschiebt, so daß die betreffende Bohrung zu tief wird. Ferner besteht die Gefahr, daß der Tiefenanschlag und/oder der Handgriff verlegt wird.Such depth stops are considering the in question coming drill lengths to be measured relatively very long and therefore bulky and often annoying In addition, there is the risk that the clamping screw for the relevant Depth stop as a result of vibrations of the sheet metal tool loosens, so that the depth stop may be imperceptible when it hits the workpiece moves backwards so that the hole in question is too deep. Furthermore, there is the risk that the depth stop and / or the handle will be misplaced.
Es ist Aufgabe der Erfindung, eine Vorricht~ag zur Einstellung der Eindringtiefe des Bohrers in das zu bearbeitende Werkstück für Elektrowerkzeuge#für bohrenden, hanimerbohrenden und schlagbohrenden Betrieb zu schaffen, bei der die Nachteile mechanischer Anschlagelemente vermieden sind und optimale Betriebssicherheit gewährleistet ist.It is the object of the invention to provide a device for setting the Penetration depth of the drill into the workpiece to be machined for power tools # for boring, hooligan boring and to create percussion drilling operations, in which the disadvantages of mechanical stop elements are avoided and optimal Operational safety is guaranteed.
Diese Aufgabe ist erfindungsgemäß dadurch gelöst, daß die Einstellvorrichtung durch einen Sender für Licht-, Schalle ektro-oder magnetische Wellen und einen Empfänger für den von dem zu bearbeitenden Werkstück reflektierten entsprechenden Wellenanteil verkörpert ist und daß der-Empfänger einen im Speisestromkreis des Antriebsmotors liegenden Schalter steuert.This object is achieved according to the invention in that the adjusting device by a transmitter for light, sound, electro or magnetic waves and a receiver for the corresponding wave portion reflected by the workpiece to be machined is embodied and that the receiver is one in the supply circuit of the drive motor lying switch controls.
Ein Ausführungsbeispiel einer berührungslosen Vorrichtung zum Einstellen der Eindringtiefe eines Bohrers in das zu bearbeitende Werkstück wird im nachstehenden anhand der Zeichnung erläutert.An embodiment of a contactless device for setting the depth of penetration of a drill into the workpiece to be machined is given below explained with reference to the drawing.
Es zeigen: Fig. 1 eine mit einer lichtelektrischen Einstellvorrichtung ausgerüstete Schlagbohrmaschine in Seitenansicht und mit an der zu bearbeitenden Wand anliegendem Bohrer, Fig. 2 eine Ansicht gemäß Fig. 1, jedoch mit in der vorgesehenen Tiefe befindlichem Bohrer, Fig. 3 eine Schaltanordnung in Pnnzipdarstellung.1 shows a device with a photoelectric adjustment device Equipped hammer drill in side view and with the one to be processed Wall adjacent drill, FIG. 2 shows a view according to FIG. 1, but with the one provided Deep drill, FIG. 3 shows a circuit arrangement in a Pnnzipdarstellung.
Wie aus den Fig. 1 und 2 ersichtlich ist, ist auf dem Getriebegehäuse 1 der Schlagbohrmaschine 2 eine Reflexlichtschranke 3 in einer Halterung 4 längsverschiebbar und lösbar angebracht. Die Halterung4 4 ist dabei mit einem Maßstab 5 für Einstellungszwecke versehen.As can be seen from FIGS. 1 and 2, is on the gear housing 1 of the hammer drill 2, a reflex light barrier 3 in a holder 4 can be moved longitudinally and releasably attached. The bracket 4 4 is with a scale 5 for adjustment purposes Mistake.
Im Falle der Fig. 1 ist der Bohrer 6 auf die zu bearbeitende Wand 7 aufgesetzt. Die Lichtschranke 3 ist so eingestellt, daß der Brennpunkt B des optischen Systems so weit von der Wand 7 entfernt ist, wie die Bohrtiefe sein soll. Beim Ausführungsbeispiel ist diese Tiefe mit S bezeichnet. Die Einstellung der Reflexlichtschranke kann dabei mit Hilfe des Maßstabs 5 und/oder durch Verstellen der Sender- und/oder Empfängeroptik erfolgen.In the case of Fig. 1, the drill 6 is on the wall to be machined 7 put on. The light barrier 3 is set so that the focal point B of the optical System is as far away from the wall 7 as the drilling depth should be. In the exemplary embodiment this depth is denoted by S. The setting of the reflex light barrier can be with the help of the scale 5 and / or by adjusting the transmitter and / or receiver optics take place.
Hat der Bohrer 6 die vorgesehene Tiefe S erreicht, so befindet sich der Brennpunkt B gerade auf der Oberfläche der Wand, die Reflexion ist in diesem Fall optimal, so daß die Lichtschranke anspricht und den Antriebsmotor der Schlagbohrmaschine abschaltet.If the drill 6 has reached the intended depth S, then there is the focal point B just on the surface of the wall, the reflection is in this Case optimally, so that the light barrier responds and the drive motor of the hammer drill turns off.
Für den Fall, daß die Reflexionsverhältnisse eines mit Bohrungen zu versehenden Werkstücks so ungünstig sein sollten, daß keine definierte Schaltung der Reflexlichtschranke erfolgt, kann auf das Werkstück irgendeine Reflexmarke aufgelegt und gegebenenfalls durch Kleben fixiert werden.In the event that the reflection ratios one with holes too provided workpiece should be so unfavorable that no defined circuit the reflex light barrier takes place, any reflex mark can be placed on the workpiece and, if necessary, fixed by gluing.
Durch die Verwendung einer einen Ultraschallsender mit zugehörigem Empfänger enthaltenden Einstellvorrichtung entfallen etwaige Lichtreflexionsprobleme ohnehin, desgleichen bei auf der Basis elektromagnetischer Wellen arbeitenden Einstellvorrichtungen. Es besteht des weiteren auch die Möglichkeit, einen kapazitiven Annäherungsschalter als Einstellvorrichtung zum Einsatz zu bringen.By using an an ultrasonic transmitter with associated Adjustment device containing receiver eliminates any light reflection problems in any case, the same applies to adjusting devices operating on the basis of electromagnetic waves. There is also the option of a capacitive proximity switch to be used as an adjusting device.
Der vom Empfänger der jeweiligen Einstellvorrichtung bei Erreichen der vorgewählten Bohrtiefe ausgehende Impuls veranlaßt das Abschalten des Antriebsmotors. Dies kann in der Weise geschehen, daß, wie Fig. 3 zeigt, ein elektrisch in Reihe mit dem Hauptschalter 8 der Schlagbohrmaschine liegender Schalter oder Schaltkontakt 9 öffnet und den Speisestromkreis des Antriebsmotors unterbricht.The recipient of the respective setting device when it is reached The impulse emanating from the preselected drilling depth causes the drive motor to be switched off. This can be done in such a way that, as FIG. 3 shows, one is electrically in series with the main switch 8 of the hammer drill lying switch or switch contact 9 opens and interrupts the supply circuit of the drive motor.
Der Anker des Antriebsmotors ist mit 10 bezeichnet, während 11 und 12 die Feldwicklungshälften des Motors darstellen.The armature of the drive motor is denoted by 10, while 11 and 12 represent the field winding halves of the motor.
Die Reflexlichtschranke 3 ist beim Ausführungsbeispiel an das speisende Netz angeschlossen, wobei der eine Anschlußkontakt 13 hinter dem Hauptschalter 8 liegt. Am Ausgang der eine komplette bauliche und elektrische Einheit darstellenden Reflexlichtschranke 3 liegt ein Relais 14, das den Kontakt 9 enthält und betätigt.The reflective light barrier 3 is in the embodiment to the feeding Mains connected, the one connection contact 13 behind the main switch 8 lies. At the exit of a complete structural and electrical unit Reflective light barrier 3 is a relay 14 which contains the contact 9 and actuates.
Die Reflexlichtschranke 3 oder ein Ultraschallsender mit zugehörigem Empfänger oder ein elektromagnetischer Sender mit Empfänger oder ein kapazitiver Näherungsschalter können von vornherein auch baulich in das Gehäuse der Schlagbohrmaschine integriert sein. Dies ist insbesondere dann zweckmäßig, wenn durch die Verwendung gedruckter Schaltungen für die inneren Schaltverbindungen und für die Aufnahme von Entstörelementen des betreffenden Elektrowerkzeugs beispielsweise im Bereich zwischen Ständerblechpaket und der dieses umgebenden Gehäusewandung hinreichend Platz für das infrage kommende Einstellglied anfällt.The reflex light barrier 3 or an ultrasonic transmitter with associated Receiver or an electromagnetic transmitter with a receiver or a capacitive one Proximity switches can also be built into the housing of the impact drill from the outset be integrated. This is particularly useful when through use printed circuits for the internal circuit connections and for the inclusion of Interference suppression elements of the relevant power tool, for example in the area between Stator core and the surrounding housing wall enough space for the adjustment element in question is incurred.
Die erfindungsgemäße Einstellvorrichtung eignet sich insbesondere auch für die bei der Montage von Skibindungen anfallenden Bohrarbeiten. Hier kommt es besonders auf Tiefengenauigkeit der Bohrungen an. Im Falle der Verwendung einer Reflexionslichtschranke empfiehlt sich die Verwendung von Infrarotlichtsendern.The adjusting device according to the invention is particularly suitable also for the drilling work involved in the assembly of ski bindings. Here comes it particularly depends on the depth accuracy of the holes. In the case of using a For the reflection light barrier, the use of infrared light transmitters is recommended.
Es ist selbstverständlich auch denkbar, einen Laser als Lichtsender einzusetzen. Die Anpassung an die verschiedenen Bohrtiefen und/oder an verschiedene Bohrerlängen kann mittels eines in der betreffenden Einstellvorrichtung ein'-gebauten Stellglieds erfolgen.It is of course also conceivable to use a laser as the light transmitter to use. The adaptation to the different drilling depths and / or to different Drill lengths can be built into the relevant adjustment device by means of a Actuator done.
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19782838968 DE2838968C2 (en) | 1978-09-07 | 1978-09-07 | Power tool equipped with a device for determining the depth of penetration of the tool into the workpiece to be machined |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19782838968 DE2838968C2 (en) | 1978-09-07 | 1978-09-07 | Power tool equipped with a device for determining the depth of penetration of the tool into the workpiece to be machined |
Publications (2)
Publication Number | Publication Date |
---|---|
DE2838968A1 true DE2838968A1 (en) | 1980-03-20 |
DE2838968C2 DE2838968C2 (en) | 1984-06-20 |
Family
ID=6048880
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19782838968 Expired DE2838968C2 (en) | 1978-09-07 | 1978-09-07 | Power tool equipped with a device for determining the depth of penetration of the tool into the workpiece to be machined |
Country Status (1)
Country | Link |
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DE (1) | DE2838968C2 (en) |
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2855217A1 (en) * | 1978-12-21 | 1980-06-26 | Licentia Gmbh | Penetration depth control for electric hand drill - measuring change in time of reflected sound wave from pulse generator |
EP0224840A1 (en) * | 1985-11-28 | 1987-06-10 | Siemens Aktiengesellschaft | Electrical-optical distance measuring instrument |
WO1987007011A1 (en) * | 1986-05-10 | 1987-11-19 | Robert Bosch Gmbh | Process for measuring the distance between a machine-tool and a workpiece |
EP0306485B1 (en) * | 1986-05-10 | 1990-07-04 | Robert Bosch Gmbh | Machine-tool, preferably drilling machine |
US6375395B1 (en) * | 1999-07-30 | 2002-04-23 | Michael G. Heintzeman | Laser guide for hand held power drill |
EP1249291A2 (en) * | 2001-04-10 | 2002-10-16 | HILTI Aktiengesellschaft | Positioning device for hand tool |
EP1271094A1 (en) * | 2001-06-29 | 2003-01-02 | ITW Befestigungssysteme GmbH | Bore depth measuring device for a driller |
EP1464428A1 (en) * | 2003-04-03 | 2004-10-06 | Robert Bosch Gmbh | Determination of the depth of a hole by means of light beams |
FR2870595A1 (en) * | 2004-05-21 | 2005-11-25 | Bosch Gmbh Robert | DEVICE FOR DETERMINING THE DEPTH OF THE PENETRATION OF A TOOL, IN PARTICULAR A MACHINE TOOL |
EP1752243A1 (en) * | 2005-08-11 | 2007-02-14 | HILTI Aktiengesellschaft | Machine tool comprising depth measurement for tools |
GB2453621A (en) * | 2008-08-13 | 2009-04-15 | Anthony Pugh | Visual drilling depth indicator |
US7992311B2 (en) | 2008-04-17 | 2011-08-09 | John Cerwin | Rotary boring tool alignment and depth indication system |
WO2012000831A1 (en) * | 2010-07-02 | 2012-01-05 | Robert Bosch Gmbh | Machine tool device comprising a sensor unit that has at least one optical sensor element |
CN102513891A (en) * | 2011-12-27 | 2012-06-27 | 北京航空航天大学 | Composite material plate-and-shell structure arbitrary-angle conical hole positioning grinding device and method |
CN103042513A (en) * | 2012-12-25 | 2013-04-17 | 宁波鑫晟工具有限公司 | Electric drill depth control structure |
US20130189041A1 (en) * | 2010-09-30 | 2013-07-25 | Hitachi Koki Co., Ltd. | Power Tool |
CN107322053A (en) * | 2015-12-18 | 2017-11-07 | 陈建欢 | A kind of method of work for the multifunction drill for being easy to process |
CN111098412A (en) * | 2018-10-25 | 2020-05-05 | 苏州宝时得电动工具有限公司 | Electric hammer |
US20220126435A1 (en) * | 2017-12-04 | 2022-04-28 | Robbox Inc. | Hand held power tool with laser measuring system and interactive display |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3732595A1 (en) * | 1987-09-28 | 1989-04-13 | Gerhard Dipl Ing Meinl | Method of signalling faults in quick-change tap chucks by means of an infrared remote control system |
US8004664B2 (en) | 2002-04-18 | 2011-08-23 | Chang Type Industrial Company | Power tool control system |
US11105613B2 (en) | 2017-08-07 | 2021-08-31 | DePuy Synthes Products, Inc. | Universal direct measurement depth gauge |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1022077B (en) * | 1954-08-07 | 1958-01-02 | Heyligenstaedt & Co | Control device for post-forming machine tools, especially milling machines |
-
1978
- 1978-09-07 DE DE19782838968 patent/DE2838968C2/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1022077B (en) * | 1954-08-07 | 1958-01-02 | Heyligenstaedt & Co | Control device for post-forming machine tools, especially milling machines |
Cited By (33)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2855217A1 (en) * | 1978-12-21 | 1980-06-26 | Licentia Gmbh | Penetration depth control for electric hand drill - measuring change in time of reflected sound wave from pulse generator |
EP0224840A1 (en) * | 1985-11-28 | 1987-06-10 | Siemens Aktiengesellschaft | Electrical-optical distance measuring instrument |
WO1987007011A1 (en) * | 1986-05-10 | 1987-11-19 | Robert Bosch Gmbh | Process for measuring the distance between a machine-tool and a workpiece |
JPH01502412A (en) * | 1986-05-10 | 1989-08-24 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | How to measure the distance of a hand-held machine tool from the workpiece |
EP0306485B1 (en) * | 1986-05-10 | 1990-07-04 | Robert Bosch Gmbh | Machine-tool, preferably drilling machine |
US4968146A (en) * | 1986-05-10 | 1990-11-06 | Robert Bosch Gmbh | Optical depth measuring device to be mounted on drilling power tool |
US6375395B1 (en) * | 1999-07-30 | 2002-04-23 | Michael G. Heintzeman | Laser guide for hand held power drill |
EP1249291A2 (en) * | 2001-04-10 | 2002-10-16 | HILTI Aktiengesellschaft | Positioning device for hand tool |
DE10117953A1 (en) * | 2001-04-10 | 2002-10-24 | Hilti Ag | Positioning aid for hand tools |
EP1249291A3 (en) * | 2001-04-10 | 2002-10-30 | HILTI Aktiengesellschaft | Positioning device for hand tool |
US6587184B2 (en) | 2001-04-10 | 2003-07-01 | Hilti Aktiengesellschaft | Positioning aid for a hand tool device |
EP1271094A1 (en) * | 2001-06-29 | 2003-01-02 | ITW Befestigungssysteme GmbH | Bore depth measuring device for a driller |
EP1464428A1 (en) * | 2003-04-03 | 2004-10-06 | Robert Bosch Gmbh | Determination of the depth of a hole by means of light beams |
FR2870595A1 (en) * | 2004-05-21 | 2005-11-25 | Bosch Gmbh Robert | DEVICE FOR DETERMINING THE DEPTH OF THE PENETRATION OF A TOOL, IN PARTICULAR A MACHINE TOOL |
US7482819B2 (en) | 2005-08-11 | 2009-01-27 | Hilti Aktiengesellschaft | Power tool with measurement of a penetration depth of a working tool |
EP1752243A1 (en) * | 2005-08-11 | 2007-02-14 | HILTI Aktiengesellschaft | Machine tool comprising depth measurement for tools |
CN1911574B (en) * | 2005-08-11 | 2010-06-16 | 希尔蒂股份公司 | Machine tool and penetration depth measurement method using the machine tool |
JP2007044867A (en) * | 2005-08-11 | 2007-02-22 | Hilti Ag | Working machine capable of measuring intrusion depth of tool |
US7992311B2 (en) | 2008-04-17 | 2011-08-09 | John Cerwin | Rotary boring tool alignment and depth indication system |
GB2453621A (en) * | 2008-08-13 | 2009-04-15 | Anthony Pugh | Visual drilling depth indicator |
GB2453621B (en) * | 2008-08-13 | 2009-11-04 | Anthony Pugh | Drilling-depth indicator for a drilling device |
WO2010018372A1 (en) * | 2008-08-13 | 2010-02-18 | Anthony Pugh | Drilling depth indicator for a drilling device |
WO2012000831A1 (en) * | 2010-07-02 | 2012-01-05 | Robert Bosch Gmbh | Machine tool device comprising a sensor unit that has at least one optical sensor element |
US20130189041A1 (en) * | 2010-09-30 | 2013-07-25 | Hitachi Koki Co., Ltd. | Power Tool |
CN102513891A (en) * | 2011-12-27 | 2012-06-27 | 北京航空航天大学 | Composite material plate-and-shell structure arbitrary-angle conical hole positioning grinding device and method |
CN102513891B (en) * | 2011-12-27 | 2013-07-24 | 北京航空航天大学 | Composite material plate-and-shell structure arbitrary-angle conical hole positioning grinding device and method |
CN103042513A (en) * | 2012-12-25 | 2013-04-17 | 宁波鑫晟工具有限公司 | Electric drill depth control structure |
CN103042513B (en) * | 2012-12-25 | 2015-12-02 | 宁波鑫晟工具有限公司 | A kind of Electric drill depth control structure |
CN107322053A (en) * | 2015-12-18 | 2017-11-07 | 陈建欢 | A kind of method of work for the multifunction drill for being easy to process |
CN107322053B (en) * | 2015-12-18 | 2019-05-14 | 金华市新风景工具有限公司 | A kind of working method of multifunction drill easy to process |
US20220126435A1 (en) * | 2017-12-04 | 2022-04-28 | Robbox Inc. | Hand held power tool with laser measuring system and interactive display |
CN111098412A (en) * | 2018-10-25 | 2020-05-05 | 苏州宝时得电动工具有限公司 | Electric hammer |
CN111098412B (en) * | 2018-10-25 | 2022-03-18 | 苏州宝时得电动工具有限公司 | Electric hammer |
Also Published As
Publication number | Publication date |
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DE2838968C2 (en) | 1984-06-20 |
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Legal Events
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8110 | Request for examination paragraph 44 | ||
D2 | Grant after examination | ||
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |