EP0689902A1 - Elément de fixation pour un manche en deux parties - Google Patents

Elément de fixation pour un manche en deux parties Download PDF

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Publication number
EP0689902A1
EP0689902A1 EP95420176A EP95420176A EP0689902A1 EP 0689902 A1 EP0689902 A1 EP 0689902A1 EP 95420176 A EP95420176 A EP 95420176A EP 95420176 A EP95420176 A EP 95420176A EP 0689902 A1 EP0689902 A1 EP 0689902A1
Authority
EP
European Patent Office
Prior art keywords
section
handle
distal section
distal
proximal
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.)
Withdrawn
Application number
EP95420176A
Other languages
German (de)
English (en)
Inventor
William R. Witkowski
John D. Connors
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Welch Allyn Inc
Original Assignee
Welch Allyn Inc
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
Application filed by Welch Allyn Inc filed Critical Welch Allyn Inc
Publication of EP0689902A1 publication Critical patent/EP0689902A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25G—HANDLES FOR HAND IMPLEMENTS
    • B25G3/00—Attaching handles to the implements
    • B25G3/02—Socket, tang, or like fixings
    • B25G3/04—Socket, tang, or like fixings with detachable or separate socket pieces
    • 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
    • B25F5/02—Construction of casings, bodies or handles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25G—HANDLES FOR HAND IMPLEMENTS
    • B25G3/00—Attaching handles to the implements
    • B25G3/02—Socket, tang, or like fixings
    • B25G3/08—Socket, tang, or like fixings with dovetail or other groove

Definitions

  • This invention relates to a construction for a handle. More particularly this invention relates to a connection for a sturdy elongated handle that is constructed in two portions. The novel connection enables the handle to resist flexion, torque, and distraction at the jointure thereof.
  • handles for supporting an instrument are required to be assembled in two portions, an upper portion for mounting the instrument and a lower hand grip portion.
  • Such handles may be hollow tubular casings that contain electronic circuitry, wiring, sensors, or the like, and are fitted with connectors for an instrument, such as a hand-held optical device.
  • a distal portion be made of metal.
  • the proximal portion could be plastic, another non-metal material, or even another metal. In many work environments it has been found that the junction between the two parts fails when the handle is subjected to repeated flexion, torque, axial distraction or compression.
  • Prior art approaches to securing two sections into assembly as a single handle include providing internal or external threads on each section, and screwing the two together. This requires relative rotation between the two portions to achieve a threaded connection and complicates the installation of wiring that extends across the junction. Press fitting two sections together, with or without adhesives, is often mechanically unreliable, and in the case of thin metal or plastic housings, the result is relatively weak, because the stress forces are concentrated at the interface between the two sections. Furthermore it is difficult to repeatedly disassemble and reassemble the two portions.
  • an elongated handle for holding an instrument that includes a proximal elongated hand grip portion for grasping in the hand of a user.
  • the elongated hand grip portion has a length and cross sectional configuration so as to be grasped by the hand with the fingers in gripping relation thereto.
  • a distal portion is connected with the elongated hand grip portion and has a mounting assembly for receiving an instrument fastened thereto.
  • An internal splint is disposed in the elongated hand grip portion and in the distal portion, and extends across the interface therebetween. The splint secures the elongated hand grip portion in assembly with the distal portion distributes mechanical stresses beyond the interface.
  • either the distal portion or the elongated hand grip portion is provided with at least two flexible, longitudinally ribbed tabs extending outwardly thereof. At least two of the tabs having outwardly extending cross longitudinal ribs.
  • the other section has internal longitudinal grooves that receive the longitudinal ribs, and further having a cross longitudinal groove formed in the internal surface for engaging the cross longitudinal ribs. The internal splint bears on the tabs to urge the longitudinal ribs and the cross longitudinal ribs into locking engagement with the longitudinal grooves and the cross longitudinal groove respectively.
  • the internal split is a self threading screw
  • the hand grip section is formed of a plastic material that can be threaded by the screw.
  • the distal section is metal, and a secure plastic-to-metal connection is formed by the arrangement.
  • a handle referenced generally at 10 comprises an elongate proximal hand grip section 12 that mates with a distal section 14.
  • a mounting assembly 16 for holding an instrument is threadably attached to the distal section 14.
  • the mounting assembly 16 is preferably fitted with a bayonet adapter 22 that accepts interchangeable instruments such as a medical ophthalmoscope head, an otoscope head, a sensor, or the like (not shown). While the invention is explained with reference to an instrument handle, it will be appreciated by those skilled in the art that the invention can be practiced with other kinds of handle assemblies as well.
  • the hand grip section 12 is a hollow shaft fabricated of plastic, and can be made by any suitable technique, such as injection molding.
  • the plastic construction is desirable for aesthetic appearance, and to provide a light weight device that can be conveniently manipulated by the user.
  • the hand grip section 12 has a series of longitudinal grooves 13 distributed about its circumference for ease in gripping by the hand or the fingers.
  • a mating adapter 15 is disposed at the distal end of the hand grip section 12.
  • the distal section 14 can also be understood with reference to FIGS. 10 and 11. It is a tubular structure, preferably of metal construction to provide strength and scuff resistance. Its proximal internal wall portion 17 receives the mating adapter 15 of the hand grip section 12. Its distal portion 19 is relatively enlarged, and provided with internal threads 21 for attachment to the mounting assembly 16, and further provided with an internal shoulder 23 that projects inwardly to seat the mounting assembly in a predetermined position.
  • the mounting assembly 16 is connected to cabling 24 that passes through the interior of the distal section 14, and the hand grip section 12 to a suitable power source or to electronics (not shown) for processing signals that may be generated by an instrument mounted on the mounting assembly 16.
  • miniature electronics 26 can be housed within the mounting assembly 16. External threads 44 are provided for engagement with threads 21 of the distal section 14.
  • the mating adapter 15 comprises four-curved outstanding tabs 32, 32 and 34, 34 that form an extension of the tubular hand grip section 12.
  • Each tab 32, 34 is provided with an outwardly projecting longitudinal rib 31 on its outer surface.
  • the two tabs 32, 32 are further provided with an outwardly projecting circumferential rib 33 that is orthogonal to the longitudinal rib 31.
  • the tabs 34 are provided only with a longitudinal rib 31.
  • the tabs 32, 34 are slightly resilient, so that they bear outwardly against the internal wall portion 17 of the distal section 14 when inserted therein.
  • the internal wall portion 17 is provided with four longitudinal grooves 41 that engage the longitudinal ribs 31 when the mating adapter 15 is inserted into the distal section 14.
  • the circumferential ribs 33 snap into a circumferential groove 43 to seat the mating adapter 15 within the distal section 14.
  • the mating engagement of the circumferential ribs 33 in the circumferential groove 43 prevents longitudinal separation of the hand grip section 12 and the distal section 14 when a distractive force is applied.
  • the engagement of the longitudinal ribs 31 in the longitudinal grooves 41 prevent the hand grip section from rotating relative to the distal section 14.
  • a self threading screw 40 is disposed inside the distal section 14 to further secure the distal section 14 to the hand grip section 12.
  • the screw head 42 bears upon a shoulder 46 that is formed on the interior wall of the distal section 14 just beyond the end of the mating adapter 15.
  • the threads of the screw 40 bite into the plastic structure of the hand grip section 12, and draws the distal section 14 and the hand grip section 12 together, as well as expanding the mating adapter 15 to urge it more firmly against the internal wall portion 17 and thereby also preventing the circumferential ribs 33 from separating from the mating circumferential groove 43. Even if the screw 40 loosens significantly, the two handle portions 12, 14 will remain rigidly attached.
  • the screw 40 When the screw 40 is inserted its threaded portion is separated from the outer wall of the hand grip section 12 by the tabs 32, 34.
  • the tabs 32, 34 also isolate the screw 40 from the housing of the distal section 14. Torsion and flexion forces thus cannot act directly on the screw threads and thereby loosen the screw.
  • the screw 40 should be preferably tightened to a torque value of about 25 inch-pounds. It has been found 10 inch-pounds is too low, and 40 inch-pounds too high for satisfactory performance. Using a self-threading screw also avoids the necessity of molding the threads in the interior of the plastic handle, which reduces the cost of manufacture.
  • Pre-threading the interior of the plastic handle and using an appropriately matched screw would also be suitable, and may be required for handles that are constructed of materials cannot handle for self-threading screws.
  • the screw 40 is long enough to extend well beyond the metal-to-plastic interface and it distributes stresses away from the interface. This significantly increases the durability and reliability of the jointure, and the handle is more capable of resisting flexion.
EP95420176A 1994-07-01 1995-06-30 Elément de fixation pour un manche en deux parties Withdrawn EP0689902A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US27013894A 1994-07-01 1994-07-01
US270138 1994-07-01

Publications (1)

Publication Number Publication Date
EP0689902A1 true EP0689902A1 (fr) 1996-01-03

Family

ID=23030063

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95420176A Withdrawn EP0689902A1 (fr) 1994-07-01 1995-06-30 Elément de fixation pour un manche en deux parties

Country Status (2)

Country Link
EP (1) EP0689902A1 (fr)
CA (1) CA2152522A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002078912A1 (fr) * 2001-03-29 2002-10-10 Snap-On Technologies, Inc. Outil pneumatique allonge a poignee molle interchangeable
US7676890B2 (en) 2005-10-25 2010-03-16 Black And Decker, Inc. Vibration dampening handle for a powered apparatus
CN108015723A (zh) * 2016-11-04 2018-05-11 株式会社牧田 通信适配器安装装置以及电动工作机
GB2590084A (en) * 2019-10-23 2021-06-23 Black & Decker Inc Pole sander
US11867224B2 (en) 2021-01-27 2024-01-09 Black & Decker Inc. Locking mechanism for two telescoping poles of a power tool
US11919127B2 (en) 2019-10-23 2024-03-05 Black & Decker Inc. Pole sander
US11931851B2 (en) 2019-10-23 2024-03-19 Black & Decker Inc. Pole sander
US11951585B2 (en) 2019-10-23 2024-04-09 Black & Decker Inc. Pole sander

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1237790A (fr) * 1959-06-22 1960-11-25 Perfectionnements aux dispositifs de fixation des manches sur les balais et analogues
GB1103262A (en) * 1964-02-12 1968-02-14 Brosserie Franc Comtoise Improvements in or relating to devices for fixing a stick or rod in a socket in a broomhead
FR2342624A7 (fr) * 1976-02-26 1977-09-23 Caprini Pietro Dispositif de blocage de tiges telescopiques, en particulier de manches pour balais, cannes a peche, et similaires
US4400878A (en) * 1981-10-05 1983-08-30 G & S Screw Machine Products, Inc. Knife blade holder
US4684283A (en) * 1986-06-23 1987-08-04 The Drackett Company Handle socket adapter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1237790A (fr) * 1959-06-22 1960-11-25 Perfectionnements aux dispositifs de fixation des manches sur les balais et analogues
GB1103262A (en) * 1964-02-12 1968-02-14 Brosserie Franc Comtoise Improvements in or relating to devices for fixing a stick or rod in a socket in a broomhead
FR2342624A7 (fr) * 1976-02-26 1977-09-23 Caprini Pietro Dispositif de blocage de tiges telescopiques, en particulier de manches pour balais, cannes a peche, et similaires
US4400878A (en) * 1981-10-05 1983-08-30 G & S Screw Machine Products, Inc. Knife blade holder
US4684283A (en) * 1986-06-23 1987-08-04 The Drackett Company Handle socket adapter

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002078912A1 (fr) * 2001-03-29 2002-10-10 Snap-On Technologies, Inc. Outil pneumatique allonge a poignee molle interchangeable
US6547015B1 (en) 2001-03-29 2003-04-15 Snap-On Technologies, Inc. Elongated pneumatic tool with replaceable soft grip
CN1298514C (zh) * 2001-03-29 2007-02-07 斯耐普昂技术公司 带有可更换柔软抓握部的细长气动工具
KR100847549B1 (ko) * 2001-03-29 2008-07-21 스냅-온 인코포레이티드 교체 가능한 유연 손잡이를 갖는 연장형 공압공구 및 연장형 공압공구에 유연 손잡이를 유지하는 방법
US7676890B2 (en) 2005-10-25 2010-03-16 Black And Decker, Inc. Vibration dampening handle for a powered apparatus
US8141209B2 (en) 2005-10-25 2012-03-27 Black And Decker, Inc. Vibration dampening handle for a powered apparatus
CN108015723A (zh) * 2016-11-04 2018-05-11 株式会社牧田 通信适配器安装装置以及电动工作机
CN108015723B (zh) * 2016-11-04 2022-04-26 株式会社牧田 通信适配器安装装置以及电动工作机
GB2590084A (en) * 2019-10-23 2021-06-23 Black & Decker Inc Pole sander
US11919127B2 (en) 2019-10-23 2024-03-05 Black & Decker Inc. Pole sander
US11931851B2 (en) 2019-10-23 2024-03-19 Black & Decker Inc. Pole sander
US11951585B2 (en) 2019-10-23 2024-04-09 Black & Decker Inc. Pole sander
US11867224B2 (en) 2021-01-27 2024-01-09 Black & Decker Inc. Locking mechanism for two telescoping poles of a power tool

Also Published As

Publication number Publication date
CA2152522A1 (fr) 1996-01-02

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