CN1130556A

CN1130556A - Hand-help tool

Info

Publication number: CN1130556A
Application number: CN 95119026
Authority: CN
Inventors: G·赫泽; G·黑文斯坦; O·西尔
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 1994-11-05
Filing date: 1995-11-03
Publication date: 1996-09-11
Anticipated expiration: 2015-11-03
Also published as: GB9521935D0; CN1052933C; GB2295054A; NL1001578C2; ES2128213A1; ES2128213B1; DE4439590C2; DE4439590A1; GB2295054B; NL1001578A1

Abstract

A hand-held power tool has an operating element which is at least partially received in a casing opening, and which may be in the form of a locking button comprising a head part and an actuating part for locking a switch operating member in a depressed position. A gap is formed between the outer periphery of the head part and the wall of the casing opening. Viewed in the operating direction of the locking button, the gap width (s) increases in such a manner that foreign bodies which have penetrated into the gap cannot prevent the return of the operating element by means of a compression spring.

Description

Hand-held power tool

The present invention relates to a kind of hand-held power tool, it has a shell, this shell is provided with one and is used for receiving at least in part an executive component, the shell aperture of an electric switch preferably, this executive component can enter in this shell aperture more deeply at the wall of its direction of operating with respect to shell aperture, and the restoring force by the element that reverses loads on the direction opposite with direction of operating, simultaneously, the wall that protrudes into part and this shell aperture in this shell of this executive component forms the gap with certain width.

This hand-held power tool (DE 3540964 AL) has been well-known, and it is provided with the executive component that can enter in the corresponding shell aperture.This type of executive component for example is to be used for power switch locking press button form as being widely used in the hand-held power tool, described button can be pressed following time by actuating at power switch, thereby lock this power switch, make the operator of hand-held power tool that power switch is being pushed continuously.When closing, power switch must be again depressed, and therefore, locking press button makes it turn back to its original position from its latched position by spring force, thereby discharges power switch.The shortcoming of this executive component is: external physical efficiency penetrates the wall of shell aperture and the gap between the executive component, thereby stuck between the wall of executive component and shell aperture, so just makes executive component singly by elastic force it not returned.

Hand-held power tool of the present invention has a shell, this shell is provided with one and is used for receiving at least in part an executive component, the shell aperture of an electric switch preferably, this executive component can enter in this shell aperture more deeply at the wall of its direction of operating with respect to shell aperture, and the restoring force by the element that reverses loads on the direction opposite with direction of operating, the wall that protrudes into part and this shell aperture in this shell of this executive component forms the gap with certain width simultaneously, and it is characterized in that: the gap width between in the wall of this executive component and this shell aperture increases on the direction of operating of this executive component.

Hand-held power tool of the present invention has the advantage opposite with above-mentioned shortcoming, i.e. the stuck danger in the shell aperture inboard of executive component has reduced.Therefore, even in the environment that is full of grounds travel or drillings thick and fast, after the continued operation a very long time, also can handle the executive component of hand-held power tool reliably.

By the measure of pointing out in the dependent claims, can make hand-held power tool of the present invention obtain favourable development and improvement.Particularly advantageously be, having the guiding rib of leading the surface that the wall that is parallel to shell aperture extends is positioned on the neighboring of conical region of executive component, because with such method, executive component can be directed in shell aperture, simultaneously, the tapering part in other zones of executive component can prevent that executive component is stuck by foreign body.In addition, forming opening in the bottom of shell aperture or on the wall, foreign body is gone from the shell aperture pass-out also is favourable.

Exemplary embodiments of the present invention is shown in the drawings and done more detailed description in the following description.Wherein:

Fig. 1 is the elevation view of the hand-held power tool of an executive component of configuration;

Fig. 2 shows the executive component of the hand-held power tool of the present invention's first exemplary embodiments;

Fig. 3 shows the executive component of the present invention's second exemplary embodiments;

Fig. 4 is the 3 dimensional drawing according to the executive component of Fig. 3.

Fig. 1 shows the hand steered rig 10 as the embodiment of hand-held power tool, and this rig has a shell 11.The front portion that has fixtures for tools 13 of jar rod 12 stretches out from this shell 11, and instrument 14 can be inserted in the fixtures for tools 13, and fixed thereon.Jar rod 12 can utilize driver motor 15 to order about its rotation by gear drive 16.Driver motor 15 can by one for example the operation of the switch handle 17 of flip-over type press button 18 forms open and shut.Switch handle 17 or flip-over type press button 18 preferably are placed on the handle 19 of hand steered rig 10 herein, and described handle is by maybe may being attached on the shell that shell 11 forms.By the executive component 20 that is placed on handle 19 sides, just can flip-over type press button 18 be locked in the position of the switch of setting with known method, specifically be locked in " opening " position of driver motor 15.This kind locking of flip-over type press button 18 is useful for the continued operation of hand steered rig 10, because the operator just needn't keep flip-over type press button 18 being pushed continuously like this.

The executive component 20 that is shown specifically in Fig. 2 is forms of locking press button 21, and this locking press button 21 can be along 22 axially-movables of the shell aperture on the handle 19 or on the shell 11, and partly stretch out described opening part.Locking press button 21 has a conical head 21a and a columnar actuation part 21b, and this actuation part has the cross section little than head, and is formed with a flange 21c on the end of actuation part 21b.Head 21a has cone shape, makes it on the direction of actuation part 21b, that is to say to reduce gradually on direction of operating.Like this, the gap with certain interval width S 24 that forms between the obvious columnar wall 23 of shell aperture 22 and head 21a just broadens on the direction of actuation part 21b.Locking press button 21 and lock part 25 co-operation, this lock part are connected on the flip-over type press button 18 with its translation, and are provided with one therein and fasten port 26.Lock part 25 is installed on the supporting-point 27 so that travel longitudinally.Flip-over type press button 18 is loaded by a backspring 28 on the direction of the answer position of flip-over type press button 18 together with lock part 25.Backspring 28 is forms of compression spring, and an end heads on shell 11 and the other end heads on flip-over type press button 18 and supported.21 of locking press buttons are loaded on its original position direction by the element 29 that reverses, and the described element that reverses also is the form of compression spring.This element 29 that reverses is bearing on the end face of head 21a of the bottom 30 of shell aperture 22 and locking press button 21.This actuation part 21b passes bottom 30.

On actuated position shown in Figure 2, the actuation part 21b of locking press button 21 is engaged in the fastening opening 26 of lock part 25 definitely, makes flip-over type press button 18 not replied by backspring 28.Flange 21c is stretched on outside the edge that fastens opening 26 here, makes locking press button 21 be retained on equally firmly on this position.In this latched position, the electric switch that is not shown specifically among Fig. 2 for example is transferred to the continuous operation position of driver motor 15 (Fig. 1).If wish to make flip-over type press button 18 from then on location restore go back.By shutting driver motor 15 in other words, must press flip-over type press button 18 gently earlier the elastic force that overcomes backspring 28 is entered in the shell 11 more deeply, no longer be stretched on outside the edge that fastens opening 26 up to flange 21c.Like this, locking press button 21 has been exactly freely, and can make it vertically to the outer side shifting of shell 11 by the element 29 that reverses.Actuation part 21b ejects fast vertically together with flange 21c and fastens opening 26 like this, and making flip-over type press button 18 also be released also can make it be returned to its initial original position place by backspring 28.

The conical neighboring of head 21a has the effect that the foreign bodies 31 in the gap 24 between the wall 23 that prevents to insert head 21a and shell aperture 22 are stuck herein, because in the process of axially reversing of locking press button 21, the gap width S between the wall 23 of head 21a and shell aperture 22 increases continuously.

Do axially-movable in order to guide locking press button 21 in shell aperture 22 inboards, in exemplary embodiments, on the neighboring of the conical head 21a of locking press button 21, be formed with guiding rib 32 according to Fig. 3; The cylindrical wall 23 that guiding rib 32 is roughly parallel to shell aperture 22 extends, and forms guidance surface 33 in its outside.Because head 21a, that is to say the neighboring area between each guiding rib 32, mainly be conical, the foreign bodies 31 that inserted in the gap 24 between the wall 23 of head 21a and shell just can not be within it stuck.In the zone of guidance surface 33, the possibility that still has foreign body 31 to be stuck, still, this guiding zone is compared less with total neighboring area, therefore, also remain with advantageous effect of the present invention in according to the exemplary embodiments of Fig. 3.Because foreign body 31 may stuck main region within it reduce on the whole greatly, just guaranteed that locking press button 21 can not made mistakes by reversing of causing of the element that reverses, especially generally caused by a plurality of foreign bodies 31 because of stuck, these foreign bodies are by for example boring dirt or grinding dirt and form.Confirmed this point by test.

In exemplary embodiments according to Fig. 3, be provided with at least one in the bottom 30 of shell aperture 22 and be used for for the opening 34 of foreign body 31 by going out, make that the longer a period of time rear casing opening 22 of operation can not be blocked yet in being full of the environment of dust to clog.Opening 34 leads to the cavity 35 interior (Fig. 2) in the shell, and foreign body 31 can be discharged therein without difficulty.

Fig. 4 is the 3 dimensional drawing according to the executive component 20 of Fig. 3.Can be clear that the head 21a that is mainly taper of locking press button 21 from figure, be distributed with four guiding ribs 32 on its periphery, described button diminishes on the neighboring area between the guiding rib 32 taperedly.Cylindrical shape actuation part 21b adjoins head 21a and is provided with flange 21c in its end.

The present invention is not limited to shown exemplary embodiments.Its application not only obviously helps hand steered rig, and obviously helps all hand-held power tools, particularly the hand-held power tool of those continued operations in being full of the environment of dust, for example milling tool etc.In addition, locking press button 21 can have any other desirable shape, and the wall 23 of itself and shell aperture 22 surrounds a gap 24 whereby, looks from direction of operating in this gap 24, and gap width S is increasing.The increase of gap width S also can obtain by the corresponding conically widening of wall 23 on the direction of operating of executive component 20 herein, and head 21a then is a cylindrical shape.Opening 34 also can be arranged in the wall 23 of shell aperture 22.The present invention also is not limited to the locking press button that is used for the flip-over type press button, and other executive components that can suitably be applied to reverse by spring-loaded mode, for example the locking sliding part on switch handle or flip-over type press button.

Claims

1. hand-held power tool, this instrument has a shell (11), this shell (11) is provided with one and is used for receiving at least in part an executive component (20), the shell aperture of an electric switch (22) preferably, this executive component can enter in this shell aperture (22) more deeply at the wall (23) of its direction of operating with respect to shell aperture (22), and the restoring force by the element that reverses (29) loads on the direction opposite with direction of operating, simultaneously, the wall (23) that protrudes into part and this shell aperture (22) in this shell (22) of this executive component (20) forms the gap (24) with certain width, and it is characterized in that: the gap width between the wall (23) of this executive component (20) and this shell aperture (22) is interior increases on the direction of operating of this executive component (20).

2. hand-held power tool as claimed in claim 1, it is characterized in that: this executive component (20) is the form of locking press button (21), and one of locking is used to control the flip-over type Push switch (18) of a drive motor (15) of this hand-held power tool on the position of this locking press button (21) in it has entered this shell aperture (22).

3. hand-held power tool as claimed in claim 1 or 2 is characterized in that: this gap (24) between the wall (23) of this executive component (20) and this shell aperture (22) at least in part with the ring formal ring around distribution.

4. hand-held power tool as claimed in claim 3 is characterized in that: gap width increases on direction of operating conically.

5. described hand-held power tool one of in the claim as described above, it is characterized in that: the part of wall (23) in executive component (20) protrudes into this shell aperture (22) of this shell aperture (22) has drum, and this executive component (20) is tapered along direction of operating in this part.

6. hand-held power tool as claimed in claim 5, it is characterized in that: a plurality of guiding ribs that are distributed (32) radially stretch out on the periphery of this executive component (20), its radial outside of each guiding rib is provided with guide surface (33), and the cylindrical wall (23) that described guide surface (33) is parallel to shell aperture (22) extends.

7. described hand-held power tool one of in the claim as described above, it is characterized in that: this element that reverses (29) is bearing on the bottom (30) of this shell aperture (22), and this bottom (30) are provided with at least one can make foreign body (31) from the opening (34) of this shell aperture (22) by going out.