WO2012142861A1 - 电钻防尘罩的定位套及使用该定位套的防尘罩 - Google Patents

电钻防尘罩的定位套及使用该定位套的防尘罩 Download PDF

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Publication number
WO2012142861A1
WO2012142861A1 PCT/CN2012/000547 CN2012000547W WO2012142861A1 WO 2012142861 A1 WO2012142861 A1 WO 2012142861A1 CN 2012000547 W CN2012000547 W CN 2012000547W WO 2012142861 A1 WO2012142861 A1 WO 2012142861A1
Authority
WO
WIPO (PCT)
Prior art keywords
dust cover
electric drill
positioning sleeve
dust
sleeve
Prior art date
Application number
PCT/CN2012/000547
Other languages
English (en)
French (fr)
Inventor
陈朝阳
Original Assignee
Chen Chao-Yang
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from CN 201120120627 external-priority patent/CN202090871U/zh
Priority claimed from CN2011103334335A external-priority patent/CN103085039A/zh
Application filed by Chen Chao-Yang filed Critical Chen Chao-Yang
Priority to AU2012244968A priority Critical patent/AU2012244968A1/en
Priority to US13/805,105 priority patent/US20130094915A1/en
Priority to SG2012083630A priority patent/SG186060A1/en
Publication of WO2012142861A1 publication Critical patent/WO2012142861A1/zh

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/0042—Devices for removing chips
    • B23Q11/0071—Devices for removing chips dust collectors for hand tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/08—Means for retaining and guiding the tool bit, e.g. chucks allowing axial oscillation of the tool bit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/20—Devices for cleaning or cooling tool or work
    • B25D17/22—Devices for cleaning or cooling tool or work using pressure fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/06—Means for driving the impulse member
    • B25D9/08—Means for driving the impulse member comprising a built-in air compressor, i.e. the tool being driven by air pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B1/00—Devices for securing together, or preventing relative movement between, constructional elements or machine parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D2217/003—Details relating to chucks with radially movable locking elements
    • B25D2217/0038—Locking members of special shape
    • B25D2217/0042—Ball-shaped locking members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
    • F16B2200/50—Flanged connections
    • F16B2200/503—Flanged connections the flange being separate from the elements to be connected
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/50—Cutting by use of rotating axially moving tool with product handling or receiving means

Definitions

  • the invention relates to a positioning sleeve for an electric drill dust cover and a dust cover using the same, in particular to a design which is positioned on the fixing portion of the electric drill to surround the rotating portion of the electric drill and then is connected with the dust cover. .
  • the dust cover 10 can cover the drill bit 22 of the electric drill 20, and a plurality of wrinkles are formed on the dust cover, so that the dust cover has an elastic restoring force after being pressed, so that the drill bit is drilled.
  • the dust cover is telescopically adjusted according to the depth of penetration of the drill bit, and can still be pressed against the outside of the drill hole to receive the dust of the drill cuttings discharged during the drilling, and the dust cover is to be drilled.
  • the elastic restoring force of the pleated portion is restored to return to the state of covering the drill bit and preventing the cutting dust from falling; however, since the existing dust cover is directly positioned at the fixing portion 21 of the electric drill 20, the dust cover as a whole The axial dimension will be very long, and the dust cover will cause a large vibration due to the vibration caused by the drilling, which will cause the dust cover to have poor adhesion to the wall end and reduce the dustproof effect.
  • the main technical problem to be solved by the present invention is to overcome the above-mentioned defects existing in the prior art, and to provide a positioning sleeve for an electric drill dust cover and a dust cover using the same, which have the dust lifting effect of the dust cover being greatly improved. And improve the user's operational safety.
  • the technical solution adopted by the present invention to solve the technical problem thereof is: the structural feature of the positioning sleeve of the present invention, comprising: a set of joint parts, a fixing portion fixed at a front edge of the electric drill body; and a supporting portion, the electric drill is drilled from the fitting portion The direction of the drill bit is extended, and the rotating portion of the electric drill is surrounded and separated, and the dust cover is combined and positioned.
  • the connecting ring body is further formed on the outer end of the supporting portion, and the inside of the connecting ring body is a dust collecting groove communicating with the inside of the dust cover; wherein the connecting ring body is provided with the dust collecting groove.
  • the air outlet is provided with a filter cotton relative to the air outlet, and an external thread for screwing the dust cover is formed on the outer periphery of the adapter ring.
  • the The inside of the support portion is provided with a bearing relative to the rotating portion of the electric drill.
  • the fitting portion is tightly disposed on the fixing portion of the electric drill, and an elastic collar for increasing the tightness degree is disposed in the fitting portion.
  • the support portion has a grid shape or a cylindrical shape, and the positioning sleeve can transmit light.
  • the structural features of the dust cover of the present invention include: a set of joints, fixed portions located at the front edge of the drill body; a support portion formed by extending the sleeve portion toward the drill bit of the electric drill, and The rotating portion of the electric drill is surrounded and separated, and the dust cover is combined and positioned; and a dust cover is coupled to the supporting portion and includes: a fixing seat coupled to the supporting portion; and a telescopic sleeve including the front end a wall ring portion, a dust collecting portion of the front portion, and a wrinkle portion of the tail portion, wherein the ring wall portion is formed with a drill piercing opening and a pushing member positioning groove, and the dust collecting portion is connected to the ring wall portion and is a small tail a large conical shape, the corrugated portion is continuous with the dust collecting portion and has a straight cylindrical shape with a diameter smaller than a tail end of the dust collecting portion, and the tail end of the corrugated portion is coupled to the fixing seat; and an
  • an outer ring is formed on the outer end of the support portion, and an outer thread is formed on the outer periphery of the connecting ring for the dust cover to be screwed, and the fixing seat of the dust cover is opposite to the connecting ring.
  • the external thread of the outer circumference of the outer body is formed with an internal thread; wherein the pushing member is a spring, and the dust cover is permeable to light.
  • the invention has the beneficial effects of greatly improving the dustproof effect of the dust cover and improving the safety of the user's operation.
  • FIG. 1 is a structural explanatory view of a conventional electric drill dust cover.
  • FIG. 2 is a perspective view showing the structure of the positioning sleeve of the present invention (1).
  • FIG. 3 is a perspective view showing the structure of the positioning sleeve of the present invention (2).
  • Figure 4 is a cross-sectional view showing the structure of the positioning sleeve of the present invention.
  • Fig. 5 is an exploded perspective view showing the structure of the positioning sleeve and the dust cover of the present invention.
  • Fig. 6 is a schematic view showing the state of use of the positioning sleeve and the dust cover of the present invention.
  • Figure 7 is a cross-sectional view showing the structure of the positioning sleeve and the dust cover of the present invention (before drilling).
  • Figure 8 is a cross-sectional view (in the borehole) of the positioning sleeve and the dust cover of the present invention.
  • the embodiment of the positioning sleeve 30 of the present invention can transmit light and includes: a set of joints 31 closely arranged to the fixing portion 21 of the front edge of the body of the electric drill 20 . And an elastic collar 311 for increasing the degree of tightness; and a grid-like or cylindrical support portion 32 for drilling the electric drill 20 from the sleeve portion 31
  • the direction of the head 22 is extended, and the rotating portion 23 of the electric drill 20 is surrounded and isolated (for the user to hold), and the dust cover 40 is combined and positioned, and the rotating portion 23 of the electric drill is opposite to the inside of the supporting portion 32.
  • the bearing 33 is provided to increase the stability of the structure and reduce the vibration.
  • the connecting ring body 322 is further formed on the outer end of the supporting portion 32, and a dust cover is formed on the outer periphery of the engaging ring body 322.
  • the external thread 323 of the connecting ring body 322 is screwed into the dust collecting groove 321 communicating with the inside of the dust cover 40, and the air discharging port 324 communicating with the dust collecting groove 321 is disposed in the connecting ring body 322.
  • a filter cotton 325 is provided to the air discharge port 324.
  • the positioning sleeve 30 is provided to shorten the length of the connected dust cover 40, and effectively reduce the vibration of the dust cover 40 due to the drilling, so that the wall end of the dust cover 40 is stably fitted. , and has the effect of greatly improving the dustproof effect of the dust cover. Moreover, since the rotating portion 23 of the electric drill 20 is surrounded by the isolation, the user can directly hold the positioning sleeve 30, and has the effect of improving the safety of the user's operation. Further, the dust collecting groove 321 of the present invention can concentrate the drill dust generated during drilling to facilitate subsequent dust cleaning.
  • the embodiment of the dust cover 40 of the present invention is coupled to the support portion 32 of the positioning sleeve 30 and includes: a fixing base 41 opposite to the positioning
  • the external thread 323 of the outer peripheral edge of the engaging ring body 322 of the support portion 32 of the sleeve 30 is formed with an internal thread 411 for engaging with the support portion 32 of the positioning sleeve 30 by means of a screwing connection; It can be axially stretched along the drill bit 22 of the electric drill 20, and includes a front wall ring portion 421, a front portion dust collecting portion 422 and a tail portion wrinkle portion 423, and the abutting ring portion 421 is formed with a drill piercelet opening.
  • the dust collecting portion 422 is connected to the abutting ring portion 421 and has a conical shape with a small head and a small tail.
  • the wrinkle portion 423 is continuous with the dust collecting portion 422 and has a smaller diameter than the dust collecting portion 422.
  • a straight cylindrical shape at the rear end of the dust collecting portion 422, and the tail end of the corrugated portion 423 is coupled to the fixing base 41; and a pushing member 43 such as a spring, and the positioning end thereof is coupled to the fixing seat 41, The free end thereof is coupled to the wall ring portion 421 of the telescopic sleeve 42. Providing the bellows 42 restoring force return the initial state.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Auxiliary Devices For Machine Tools (AREA)
  • Drilling And Boring (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)

Description

说明书 电钻防尘罩的定位套及使用该定位套的防尘罩 技术领域
本发明是有关一种电钻防尘罩的定位套及使用该定位套的防尘罩，尤指一种定位 于电钻的固定部而将电钻的转动部围绕隔离， 再供防尘罩连结的设计。
背景技术
使用电钻所产生的大量粉尘会四处飞散而弥漫于空气中， 不仅严重影响空气质 量， 同时影响施工人员的呼吸困难， 亦会破坏环境整洁且难以清理； 因此， 如「图 1」 所示的电钻防尘罩 10， 其可将电钻 20的钻头 22包覆于内， 并配合该防尘罩上形成 有数个皱褶部， 以使该防尘罩按压后具有弹性回复力， 故钻头钻孔时， 该防尘罩随着 钻头的钻入的深度来做伸缩调整，仍能顶抵于钻孔处外， 以承接钻孔时所排出的钻屑 粉尘， 待钻孔毕， 则该防尘罩将受皱褶部的弹性回复力作用， 回复至将钻头包覆状态 且防止钻屑粉尘掉落； 然而， 由于现有的防尘罩直接定位于电钻 20的固定部 21， 防 尘罩整体的轴向尺寸会很长， 防尘罩会因钻孔时所造成的振动， 而令防尘罩产生大幅 的振动， 致使防尘罩的抵墙端密合性不佳， 降低其防尘效果。
发明内容
本发明所要解决的主要技术问题在于， 克服现有技术存在的上述缺陷， 而提供一 种电钻防尘罩的定位套及使用该定位套的防尘罩，其具有大幅提升防尘罩防尘效果且 提升使用者操作安全的功效。
本发明解决其技术问题所采用的技术方案是- 本发明定位套的结构特征， 包括： 一套合部， 定位于电钻本体前缘的固定部； 以 及一支撑部， 自该套合部向电钻的钻头的方向延伸所形成， 而将电钻的转动部予以围 绕隔离， 且供防尘罩结合定位。
此外， 进一步于该支撑部外端段外扩形成有衔接环体， 而该衔接环体内部成为与 防尘罩内部连通的集尘槽； 其中， 该衔接环体设有连通该集尘槽的泄风口， 且相对该 泄风口设置有过滤棉， 该衔接环体外周缘形成有供防尘罩螺合连结的外螺纹。 又， 该 支撑部内部相对电钻的转动部设置有轴承。 另， 该套合部紧配定位于电钻的固定部， 并于该套合部设置一增加紧配程度的弹性套环。 再者， 该支撑部为栅条状或筒状， 且 令该定位套可透光。
另者， 本发明防尘罩的结构特征， 包括： 一套合部， 定位于电钻本体前缘的固定 部； 一支撑部， 自该套合部向电钻的钻头的方向延伸所形成， 而将电钻的转动部予以 围绕隔离， 且供防尘罩结合定位； 以及一防尘罩， 连结于该支撑部而包括有： 一固定 座， 结合定位于该支撑部； 一伸缩套， 包括前端的抵墙环部、 前段的集尘部及尾段的 皱褶部， 该抵墙环部形成有钻头穿伸口与顶推件定位槽， 该集尘部接续于该抵墙环部 而为头小尾大的圆锥形型态，该皱褶部接续于该集尘部而为口径小于该集尘部尾端的 直筒形型态， 并将该皱褶部尾端连结于该固定座； 以及一顶推件， 将其定位端连结于 该固定座， 而令其自由端与该伸縮套的抵墙环部连结。
然而， 进一步于该支撑部外端段外扩形成有衔接环体， 且于该衔接环体外周缘形 成有供防尘罩螺合连结的外螺纹，而该防尘罩的固定座相对该衔接环体外周缘的外螺 纹形成有内螺紋； 其中， 该顶推件为弹簧， 且令该防尘罩可透光。
本发明的有益效果是，具有大幅提升防尘罩防尘效果且提升使用者操作安全的功 效。
附图说明
下面结合附图和实施例对本发明进一步说明。
图 1是现有电钻防尘罩的结构说明图。
图 2是本发明定位套的结构立体示意图 (一）。
图 3是本发明定位套的结构立体示意图（二）。
图 4是本发明定位套的结构剖视图。
图 5是本发明定位套与防尘罩的结构立体分解图。
图 6是本发明定位套与防尘罩的使用状态示意图。
图 7是本发明定位套与防尘罩的结构剖视图 (钻孔前)。
图 8是本发明定位套与防尘罩的结构剖视图 (钻孔中）。
图中标号说明：
10防尘罩 20电钻
21固定部
22钻头
23转动部
30定位套
31套合部
311弹性套环
32支撑部
321集尘槽
322衔接环体
323外螺纹
324泄风口
325过滤棉
33轴承
40防尘罩
41固定座
411内螺紋
42伸缩套
421抵墙环部
4211钻头穿伸口
4212顶推件定位槽
422集尘部
423皱褶部
43顶推件
具体实施方式
首先， 请参阅 「图 2」 〜 「图 6」 所示， 本发明的定位套 30实施例可透光而包括 有： 一套合部 31， 紧配定位于电钻 20本体前缘的固定部 21， 并可设置一增加紧配程 度的弹性套环 311 ; 以及一栅条状或筒状的支撑部 32， 自该套合部 31向电钻 20的钻 头 22的方向延伸所形成，而将电钻 20的转动部 23予以围绕隔离 (可供使用者握持）， 且供防尘罩 40结合定位，另于该支撑部 32内部相对电钻的转动部 23设置有轴承 33, 可增加结构的稳定性而减少振动； 又， 进一步于该支撑部 32外端段外扩形成有衔接 环体 322， 且于该衔接环体 322外周缘形成有供防尘罩 40螺合连结的外螺纹 323，而 该衔接环体 322内部成为与防尘罩 40内部连通的集尘槽 321， 并于该衔接环体 322 设有连通该集尘槽 321的泄风口 324， 又相对该泄风口 324设置有过滤棉 325。
基于上述的构成， 该定位套 30的设置可让所连结的防尘罩 40的长度缩短，有效 降低防尘罩 40因钻孔所造成的振动， 使防尘罩 40的抵墙端稳定密合， 而具有大幅提 升防尘罩防尘效果的功效。 再者， 由于电钻 20的转动部 23被围绕隔离， 使用者可直 接握持于该定位套 30, 另具有提升使用者操作安全的功效。 又， 本发明的集尘槽 321 可让钻孔时所产生的钻屑粉尘集中， 方便后续的粉尘清洁处理。
再者， 请进一步参阅 「图 6」 〜 「图 8」 所示， 本发明的防尘罩 40实施例， 连结 于该定位套 30的支撑部 32而包括有： 一固定座 41， 相对该定位套 30的支撑部 32 的该衔接环体 322外周缘的外螺纹 323形成有内螺纹 411， 以利用螺合连结而结合定 位于该定位套 30的支撑部 32; —可透光的伸缩套 42，可沿着电钻 20的钻头 22轴向 伸缩， 而包括前端的抵墙环部 421、 前段的集尘部 422及尾段的皱褶部 423， 该抵墙 环部 421形成有钻头穿伸口 4211与顶推件定位槽 4212， 该集尘部 422接续于该抵墙 环部 421而为头小尾大的圆锥形型态，该皱褶部 423接续于该集尘部 422而为口径小 于该集尘部 422尾端的直筒形型态， 并将该皱褶部 423尾端连结于该固定座 41 ; 以 及一诸如弹簧的顶推件 43， 将其定位端连结于该固定座 41， 而令其自由端与该伸缩 套 42的抵墙环部 421连结， 以提供该伸缩套 42回复初始状态的回复力。
以上所述， 仅是本发明的较佳实施例而已， 并非对本发明作任何形式上的限制， 凡是依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与修饰， 均 仍属于本发明技术方案的范围内。
综上所述， 本发明在结构设计、使用实用性及成本效益上， 完全符合产业发展所 需， 且所揭示的结构亦是具有前所未有的创新构造， 具有新颖性、 创造性、 实用性， 符合有关发明专利要件的规定， 故依法提起申请。

Claims

权利要求书
1、 一种电钻防尘罩的定位套， 其特征在于， 包括：
一套合部， 定位于电钻本体前缘的固定部；
一支撑部， 自该套合部向电钻的钻头的方向延伸所形成， 而将电钻的转动部予以 围绕隔离， 且供防尘罩结合定位。
2、根据权利要求 1所述的电钻防尘罩的定位套， 其特征在于， 进一步于所述支 撑部外端段外扩形成有衔接环体，而所述衔接环体内部成为与防尘罩内部连通的集尘 槽。
3、根据权利要求 2所述的电钻防尘罩的定位套， 其特征在于， 所述衔接环体设 有连通所述集尘槽的泄风口， 且相对所述泄风口设置有过滤棉。
4、根据权利要求 3所述的电钻防尘罩的定位套， 其特征在于， 所述衔接环体外 周缘形成有供所述防尘罩螺合连结的外螺紋。
5、根据权利要求 1至 4项任一项所述的电钻防尘罩的定位套， 其特征在于， 所 述支撑部内部相对电钻的转动部设置有轴承。
6、根据权利要求 5所述的电钻防尘罩的定位套， 其特征在于， 所述套合部紧配 定位于电钻的所述固定部， 并于所述套合部设置一增加紧配程度的弹性套环。
7、根据权利要求 6所述的电钻防尘罩的定位套， 其特征在于， 所述支撑部为栅 条状或筒状， 且令所述定位套可透光。
8、 一种使用权利要求 1所述定位套的电钻防尘罩， 其特征在于， 包括- 一套合部， 定位于电钻本体前缘的固定部；
一支撑部， 自该套合部向电钻的钻头的方向延伸所形成， 而将电钻的转动部予以 围绕隔离， 且供防尘罩结合定位；
一防尘罩， 连结于该支撑部而包括有： 一固定座， 结合定位于该支撑部； 一伸縮 套， 包括前端的抵墙环部、前段的集尘部及尾段的皱褶部， 该抵墙环部形成有钻头穿 伸口与顶推件定位槽， 该集尘部接续于该抵墙环部而为头小尾大的圆锥形型态， 该皱 褶部接续于该集尘部而为口径小于该集尘部尾端的直筒形型态，并将该皱褶部尾端连 结于该固定座； 以及一顶推件， 将其定位端连结于该固定座， 而令其自由端与该伸缩 套的抵墙环部连结。
9、 根据权利要求 8所述的电钻防尘罩， 其特征在于， 进一步于所述支撑部外端 段外扩形成有衔接环体，且于所述衔接环体外周缘形成有供所述防尘罩螺合连结的外 螺纹， 而所述防尘罩的固定座相对所述衔接环体外周缘的外螺纹形成有内螺纹。
10、 根据权利要求 9所述的电钻防尘罩， 其特征在于， 所述顶推件为弹簧， 且令 所述防尘罩可透光。
PCT/CN2012/000547 2011-04-22 2012-04-23 电钻防尘罩的定位套及使用该定位套的防尘罩 WO2012142861A1 (zh)

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