CN1296948C - electrical appliances - Google Patents

Abstract

The invention relates to an electrical appliance, in particular for a hand-held power tool (1) such as a drill, a power screwdriver, a grinder for curved ends, etc. The device has a switching element (7) which is inaccessible to the user, and an operating element (8) which is accessible to the user for actuating the switching element (7). The operating part is spaced from the switching part, and a plastic part (9) is located between the operating part (8) and the switching part (7) so that a force exerted by a user on the operating part (8) can be transmitted to the switching part (7) by means of said plastic part (9), an electric switch having a manually movable operating mechanism is arranged in the housing so that said switching part and operating part form an additional switching device relative to the electric switch; the operating part is positioned in the shell at a distance from the operating mechanism; the switch component is arranged on a switch housing of the electric switch.

Description

electrical appliances

technical field

The invention relates to an electrical appliance.

Background technique

Such electrical appliances may be manual electric tools such as drills, electric screwdrivers such as battery-operated screwdrivers, and angle handle hand grinders.

The power tool has a housing with a handle, and an electric switch with a manually operable operating mechanism is housed in the housing for turning on and off the hand power tool. If necessary, the rotational speed of the electric tool can be adjusted according to the position of the actuating mechanism. If the user of the electric hand tool is to be able to adjust other functions, for example the pulse function with impact rotation of the tool head for screwdriving, a switching element is provided for this purpose in the housing. An operating part for manually turning these other functions on and off is provided in this switch part. Because the switch unit is located within the housing of the power tool, the switch unit is generally mounted facing away from the user. In contrast, the operating components are installed towards the user.

In order to actuate the switching part via the operating part, it is necessary for the two parts to be directly adjacent to each other. Due to the position in and/or on the housing of the hand-held power tool, in some cases the switching device consisting of the switching part and the operating part is not optimally arranged.

US 4 421 964 A discloses a hand-held vacuum cleaner with a housing in which a switch element with an operating button for switching the hand-held vacuum cleaner is arranged facing away from the operator. The switching element can be remotely actuated by the operator by means of an operating element facing the operator and arranged on the handle separately from the switching element. A long, flexible and sheet-shaped plastic part guided in the housing serves to transmit the force exerted by the operator on the operating part. For this purpose, the operating button of the switch part is embedded in a hole at one end of the plastic part, while the operating part is mounted on the other end of the plastic part.

Although this switchgear with switch parts and spaced-apart operating parts offers a certain amount of freedom in its arrangement, if the user is required to be able to set a function that is not described in the above-mentioned documents, it needs to be located at a very close distance. An additional switch is placed inside.

In US 4 380 693 A there is also disclosed a switching device for an electric tool, wherein a switch part is similarly arranged so that it can be operated remotely by the operator via the operating part. Here, the movement of the operating part is transmitted to the switching part via a lever. However, since the rod is rigid, the freedom of arrangement of the switch components within the power tool housing is greatly restricted.

Contents of the invention

Based on US 4 421 964 A, the object of the present invention is to specify an electrical appliance with an additional switch, wherein the arrangement of the switch and/or switch parts and/or operating parts spaced apart from the switch parts is increased. degrees of freedom.

This object is achieved for the universal electrical appliance by the following features: According to the electrical appliance according to the invention, there is a housing and a switch part positioned in the housing and facing away from the operator, and an operating part for operating the switch part, The operating part is arranged at a distance from the switch part and facing the operator's operating part; wherein a plastic part which is at least partly guided in the housing is arranged between the operating part and the switching part, so that the operating part is applied by the operator. The force on the part can be transmitted to the switch part through the plastic part, wherein an electric switch with a manually movable operating mechanism is arranged in the housing, so that the switch part and the operating part form an additional part with respect to the electric switch. The switching device; the operating part is positioned in the housing with a distance from the operating mechanism; the switching part is arranged on the switch housing of the electric switch.

In the electrical appliance according to the invention, a plastic part is arranged between the actuating part and the switching part in such a way that a force exerted by an operator on the actuating part can be transmitted to the switching part by means of the plastic part. The operating part can thus be arranged at a suitable position within the housing of the power tool, in particular at a distance from the actuating mechanism for the on/off switch of the power tool, thereby improving ergonomics for the user. The plastic part can be arranged in such a way that it is at least partially guided in the housing. Other configurations of the present invention are the content of the preferred embodiments.

This plastic part can be designed as a flexible flat linear part acting as a sliding part. The operating part can also be made as a sliding part that moves linearly. The switching element consists of a Hall sensor and a magnet in an extended structure. In this case, the magnet can be moved by means of the plastic part in such a way that the Hall sensor generates a switching signal when the operating part is manually actuated.

Inside the housing of the power tool there may be pins, ledges etc. for guiding the plastic parts point by point. Furthermore, the plastic part can also be guided along a part of the wall of the housing. It can be proposed to arrange the operating element on the rear of the housing, in particular above the power tool handle. Furthermore, the outer switch part can be arranged on the electric switch of the hand-held power tool, in particular on the switch housing of this switch. In this case, the switch can be easily routed together with the switch part, and thus the risk of the user making a mistake between the actuating mechanism and the operating part can be reliably ruled out. For this purpose, some switching components, such as Hall sensors, are even located protected within the switch housing.

The advantage obtained by the invention is, in particular, that the operating element can be arranged on the housing of the power tool at an ergonomically favorable position for the user. On the contrary, the switch part can be arranged in the housing of the power tool at a particularly favorable position for performing the switching function, or can also be arranged in the housing at a position suitable for use. Furthermore, the switching device according to the invention is easy to install and inexpensive. Finally, it is possible to simply wire the switches together with the switching components.

Description of drawings

An embodiment of the invention is shown in the drawings and described in detail below. In the attached picture:

Figure 1 is a cutaway view of the housing of a hand power tool; and

Fig. 2 The casing viewed from II direction in Fig. 1, wherein the casing is partially cut away.

Detailed ways

The hand-held power tool 1 shown in FIG. 1 can be a drill, an electric screwdriver, a battery-driven screwdriver, an angle handle portable grinder, etc., and it has a housing 2 and a handle 3 . In the housing 2, more precisely in the handle 3 of the housing 2, there is an electrical switch 4 for switching the hand-held power tool 1 on and off. For this purpose, the switch 4 has an actuating mechanism 5 which can be moved manually by the operator. If necessary, the electric hand tool 1 can be equipped with an electronic device for controlling the rotational speed, so that the operator can adjust the rotational speed according to the position of the operating mechanism 5 . The electronics are suitably located within the switch housing 15 of the switch 4 .

The electric hand tool 1 additionally has a switching device 6 , which is used, for example, to activate a pulse function of the electric hand tool 1 . During operation with the switched-on pulse function, the tool mounting head of the electric hand tool 1 performs a percussion movement for screwdriving in order to screw in the screw smoothly and easily. The switch device 6 consists of a switch part 7 located in the housing 2 and an operating part 8 arranged on the switch part 7 . The switch part 7 is located inside the housing 2 and is thus mounted in the housing facing away from the operator. On the contrary, the operating part 8 is mounted on the housing 2 facing the operator, so that the operator can manually operate it. For reasons of safe handling, the operating element 8 is arranged on the rear of the housing 2 , more precisely above the handle 3 of the hand power tool 1 . Thus, the operating part 8 is separated from the switch part 7 by a distance. The plastic part 9 arranged between the actuating part 8 and the switching part 7 transmits the force exerted by the operator on the actuating part 8 to the switching part 7 so that the remote switching part 7 can be switched.

In another construction, the plastic part 9 is made as a flexible flat linear part in the form of a sliding part. The operating part 8 can likewise be formed by a linearly movable sliding part, as can be seen from FIG. 2, so that the switching device 6 can be actuated by the operator by sliding. Attached to the slide part 8 is an elastic positioning element 10 which is guided in a slot 11 on the housing 2 . There are two positioning positions in the slide groove 11 , and the positioning member 10 can enter the two positioning positions corresponding to the on or off position of the switch part 7 .

As can be seen from FIG. 1 , the plastic part 9 is at least partially guided in the housing 2 , thereby preventing snagging etc. in the housing 2 . Pins 12 , crosspieces etc. serve to guide the plastic part 9 point by point in the housing 2 and, if necessary, along a part of the wall 13 of the housing 2 .

The switch member 7 can be a conventional electric switch. A sensor switch consisting of a Hall sensor and a magnet 14 is preferably used for this purpose. As can be seen from FIG. 1 , the magnet 14 can be moved by means of the plastic part 9 . When the user manipulates the operating part 8 manually, the magnet 14 moves along the Hall sensor, and at the same time, the Hall sensor generates a switch signal for turning on or off the pulse function. In order to easily equip the electric hand tool with such an additional switching device 6 , the switching element 7 is arranged on and/or in the electrical switch 4 , that is to say also its switch housing 15 . Hall sensors, not shown, can be located inside the switch housing 15 . There is also an electronic device for controlling the motor of the hand-held electric tool 1 in the switch housing 15, so that the Hall sensor can be installed on the printed circuit board of the electronic device, and the switch signal of the Hall sensor can be directly in accordance with the electronic device. Pulse function on or off control. The magnet 14 itself is arranged outside the switch housing 15 .

The invention is not limited to the illustrated and depicted embodiments. It also includes developments by professionals within the scope of the invention defined by the claims. Such switching devices can find application not only on electric tools but also in electric tools such as electric garden tools, electric household appliances, and the like.

list of reference signs

1 hand power tool

2 shell

3 handles

4 electric switch

5 control mechanism

6 switch device

7 switch parts

8 Operating parts/sliding parts

9 plastic parts

10 positioning parts

11 chute

12 pins

13 (housing) wall

14 magnets

15 (of the switch) switch housing

Claims (10)

1. appliances, have a shell (2) and one and be positioned at shell (2) and operator's switch block (7) dorsad, and having a functional unit (8) that is used for console switch parts (7), this functional unit (8) is arranged to and oriented manipulation person's spaced apart with switch block (7) functional unit (8); Wherein, a plastic components (9) that guides in shell (2) at least in part is disposed between functional unit (8) and the switch block (7), make the power that is applied on the functional unit (8) by the operator to be delivered on the switch block (7) by plastic components (9), it is characterized in that, electric switch (4) with the operating mechanism (5) that can move by hand is arranged in the shell (2), makes described switch block (7) and functional unit (8) constitute an additional switching device (6) with respect to electric switch (4); Functional unit (8) is positioned in the shell (2) with operating mechanism (5) spaced apartly; Switch block (7) is arranged on the switch case (15) of electric switch (4).

2. according to the described appliances of claim 1, it is characterized in that plastic components (9) becomes the flat linear parts of a flexibility with the form of a slide unit.

3. according to the described appliances of claim 1, it is characterized in that, switch block (7) comprises that one is positioned at the inner Hall element of switch case (15) and a magnet (14) that is arranged in outside the switch case (15), this magnet (14) can be moved by means of plastic components (9), make that when manual manipulation functional unit (8) Hall element produces a switching signal.

4. according to the described appliances of claim 1, it is characterized in that, functional unit (8) but become the slide unit that a straight line moves.

5. according to the described appliances of claim 1, it is characterized in that pin (12), strut rail are arranged in shell (2), be used for pointwise ground guiding plastic components (9).

6. according to the described appliances of claim 1, it is characterized in that described plastic components (9) is along a part of wall (13) guiding of shell (2).

7. according to the described appliances of claim 1, it is characterized in that functional unit (8) is arranged in the back side of shell (2).

8. according to the described appliances of claim 1, it is characterized in that electric switch (4) is arranged in the handle (3) of shell (2), and functional unit (8) is arranged in the top of the handle (3) of shell (2).

9. according to the described appliances of claim 1, it is characterized in that described appliances are electric tool (1).

10. according to the described appliances of claim 9, it is characterized in that described electric tool (1) is rig, electric screwdriver or angel grinder.