CN208045335U - round foot switch - Google Patents

Abstract

The utility model relates to a circular foot switch (1). The circular foot switch has at least one switch element (14). The switch element is operated by a linearly movable punch block (16). The block is coupled to a centrally fixed, reversible and movable foot control element (7), wherein the circular foot switch (1) has at least one rocker element (15), which on the one hand is connected to the The foot control element (7) cooperates and on the other hand cooperates with at least one of the switching elements (14), wherein at least the switching element (14) is arranged lying down. The object of the present invention is to realize a circular foot switch with a low structural height that can be easily assembled, wherein the following embodiments of the actuation drive can be realized, which in the case of a plurality of switching elements can be actuated When the elements are actuated, the switching elements are switched on substantially simultaneously or substantially sequentially.

Description

round foot switch

technical field

The utility model relates to a circular foot switch, the circular foot switch has one or more switch elements, and the switch elements pass through a punching block capable of linear movement The switching element is coupled to a centrally fixed, pivotable and movable foot operating element.

Background technique

Circular foot switches are used in many fields and have a generally circular, horizontally oriented actuating element in the rest position, which can be actuated not only in a tilted manner for eccentric actuation, but also in a downward direction for central actuation. The actuation of the foot actuation element is transmitted via the plunger to the one or more switching elements, wherein the switching function is qualitatively the same both during a tilt actuation and during a push actuation.

In this case, there may be two or more switching elements which, depending on the specific embodiment of the actuation drive, are switched on substantially simultaneously or sequentially when the foot actuation element is actuated. In this case, the embodiment with two substantially simultaneously switched, electrically connected switching elements is preferably used in fields where increased requirements are placed on switching safety, for example in the medical field. A typical application of such an embodiment is the control of dental treatment instruments.

However, there are also applications in which two or more switching elements which are substantially not switched on at the same time are used to select one or more actuated Different functions of the instrument. In this case, the signal transmission for the device to be actuated can take place via a wired connection or wirelessly, wherein a suitable voltage source can be provided in the switch if necessary.

Document CN205104381U describes such a circular foot switch. A disadvantage of such switches is the complex assembly. Furthermore, an embodiment with a plurality of switching elements which are substantially not switched on at the same time is difficult to implement.

Document CN105390309A also relates to a circular foot switch of the type mentioned at the beginning of the text. Owing to the upright arrangement of the switching elements of the described circular foot switch, the switch has a minimal overall height. Here too, an embodiment with a plurality of switching elements which are substantially not switched on at the same time is difficult to realize. In addition, when the switch is operated, liquid can enter the inside of its housing, which makes it very difficult to comply with the European standard EN60601 for components to be applied to medical instruments.

The subject of document EP1998703B1 is a circular foot switch for use in the field of medicine or dentistry, with the concept of which it is possible to produce an embodiment with a plurality of switching elements which are substantially not switched on at the same time. For this purpose, the switch has a microswitch as switching element, which is placed vertically next to the plunger. During the downward movement of the plunger, the plunger presses the actuating element for the microswitch outwards and thus triggers the switching process. The actuating element, which is configured at different heights or is arranged at different heights next to the plunger, triggers a switching process correspondingly in different plunger positions, past which the plunger is moved. Disadvantages of such a switch are the very large number of parts and thus the difficult assembly resulting from the selected type of actuating drive.

Utility model content

Therefore, the object of the present invention is to realize a round foot switch with a low overall height and which can be easily assembled, wherein the following embodiments of the actuating drive can be realized, which in the case of a plurality of switching elements When the actuating element is actuated, the switching elements are switched on substantially simultaneously or substantially sequentially. A further task is to design the circular foot switch in such a way that it is easy to comply with the sections of the standard EN 60601 that are to be applied to such medical devices, in particular those that relate to protection against the ingress of liquids.

To this end, the utility model relates to a circular foot switch with at least one switching element, which is actuated by a linearly movable plunger, which is connected to a centrally fixed, A reversible and movable coupling of the foot control element, characterized in that the circular foot switch has at least one pivot element which cooperates with the foot control element on the one hand and with the respective foot control element on the other hand At least one of the switching elements cooperates, wherein at least the switching element is arranged lying down.

According to a preferred embodiment of the present invention, the circular foot switch has at least two switching elements, each of which is assigned a pivot element for actuation.

According to a preferred embodiment of the invention, the pivoting elements are designed and arranged identically, so that the at least two switching elements are switched in the same position of the striker.

According to a preferred embodiment of the invention, the pivoting elements are designed and arranged differently, so that the at least two switching elements are switched in different positions of the plunger.

According to a preferred embodiment of the invention, the at least one pivoting element is a rod.

According to a preferred embodiment of the invention, the at least one pivot element is a double-sided lever, wherein a first lever arm protrudes below the edge of the striker and a second lever arm acts on the actuation of the associated switching element. button.

According to a preferred embodiment of the present invention, the circular foot switch has a housing, the housing has a base plate and an upper part of the housing, and the base plate and the upper part of the housing are sealed to each other.

According to a preferred embodiment of the invention, the base plate is formed in one piece with at least one switching element receptacle, at least one pivot element receptacle and at least one pin for guiding the plunger.

According to a preferred embodiment of the present utility model, the elastic sealing member seals the gap between the punch block and the upper part of the housing.

According to a preferred embodiment of the present invention, the elastic sealing member is a film sealing member, and the film sealing member is connected with the punch block and the upper part of the housing.

The circular foot switch according to the invention has at least one pivot element, which interacts with the foot actuation element on the one hand and with at least one of the switching elements on the other hand, wherein , at least the switching element is arranged lying down.

The pivot element serves to transmit the triggering movement of the plunger to the at least one switching element. When using a plurality of switching elements, different switching points for different switching elements can easily be realized by means of differently configured pivot elements without having to improve the fastening of the switching elements within the switch housing. Furthermore, due to the lying arrangement of one or more switching elements, the switching housing can be easily sealed, for example by means of an elastic seal facing the actuating element.

Description of drawings

The utility model is described in detail below with reference to the accompanying drawings by means of embodiments.

In the attached picture:

Fig. 1 shows the perspective view of the circular foot switch for the operation of wire connection according to the utility model;

2 shows a perspective exploded view of a circular foot switch for wired operation according to the invention, which in this embodiment has two switches for substantially simultaneous switching element;

3 shows a cross-sectional view of the circular foot switch according to FIGS. 1 and 2 perpendicularly to the outgoing wire bundle passing through the center of the circle defined by the switch contour;

FIG. 4 shows an enlarged detail of FIG. 3 .

Detailed ways

FIG. 1 shows a circular foot switch 1 with the wiring harness 2 necessary for the operation of the wired connection. The housing upper part 3 has a wire lead-through region 4 for the lead-through of the wire harness 2 , which is provided with a sealing element 5 and/or a sealant 6 . In an embodiment for wireless operation (not shown here), the conductor bundle 2 and the conductor lead-through region 4 are omitted. Instead, the housing upper part 3 can have a module chamber for accommodating a communication module mounted or integrally formed on the housing upper part. When the communication module is housed in the switch housing, the module compartment can be omitted.

Arranged above the housing upper part 3 is a foot actuating element 7 with a cover 8 , wherein the cover 8 is fastened to the foot actuating element 7 in a suitable manner, for example glued to it. The fastening and mounting of the foot actuation element 7 will be described further below in connection with the description of the remaining figures.

FIG. 2 shows an embodiment of the round foot switch 1 from FIG. 1 in a perspective exploded view. The base plate 9 is formed in one piece with the switching element receptacle 10 , the pivot element receptacle 11 , the conductor guide 12 and the pin 13 . The switching element receptacle 10 serves to accommodate a switching element 14 connected to the conductor harness 2 . A pivot element 15 is pivotably mounted in the pivot element receptacle 11 . The punch 16 is guided by the pin 13 via a central hole of suitable size and rests on two concentrically arranged return springs 17 housed on both ends in grooves of the base plate 9 and of the punch 16 . In the switch 1 shown, two return springs are used only for redundancy purposes, that is to say for a reliable return of the switch 1 even if one of the springs fails. It therefore goes without saying that only one restoring spring can also be used. Likewise, other and/or additionally provided restoring springs can be used in principle.

An elastic seal 18 , which is additionally secured by a clamping ring 19 , is inserted into the centrally arranged opening of the housing upper part 3 . The clamping ring 19 is screwed together with the base plate 9 to the housing upper part 3 by means of mounting screws 20 , wherein the plunger 16 protrudes through the central opening of the elastic seal 18 and thus ensures the sealing of the switch housing towards the actuating element. . Via the clamping bracket 21 and the fastening screw 22 screwed into the housing upper part 3 , the conductor harness 2 is fixed relative to the housing upper part 3 against a tensile force.

The housing base 24 is fastened to the housing upper part 3 by means of base screws 23 and is sealed downwards by means of a seal 25 . In a suitable manner, for example by gluing, a one-piece or multi-piece bottom support 26 is mounted on the underside of the housing bottom 24, by means of which the switch 1 rests on the bottom so that the position of the switch 1 Unintentional sliding becomes difficult. Instead of the bottom support 26, three or more (not shown here) feet can also be used.

The foot actuating element 7 rests on the plunger 16 and is pivotably fastened to the pin 13 by means of a retaining screw 27 and a retaining cap 28 . The retaining screw 27 and the retaining cap 28 are covered by a cover 8 which, in the assembled state of the switch 1 , is fixed in a suitable manner on the foot actuating element 7 , for example glued to it.

3 and 4 show a sectional view of the circular foot switch 1 according to FIG. 1 perpendicularly to the outgoing conductor strand 2 , which passes through the center of the circle defined by the switch contour. The foot actuating element 7 can advantageously have an elastic stop element 29 , which, when the foot actuating element 7 is fully pivoted, suppresses stop noises and protects the housing upper part 3 and the foot actuating element 7 against damage.

A description of an embodiment for substantially non-simultaneous switching is given below with reference to FIG. 3 . It goes without saying that the number of switching elements is not limited to two, but any number of switching elements is possible, limited only by the available installation space and size of the switching elements.

The switch is shown at rest. The state of rest is established by the force of the return spring 17 on the plunger 16 . When the actuating element 7 is turned over, the plunger 16 thus presses with its arched surface 30 against the point of the lower cavity edge 31 corresponding to the turned over position, whereby the actuating element 7 pivots slidingly on the holding cap 28 into a horizontal position. Afterwards or when the actuating element 7 is not turned over, the plunger 16 is pressed with its arched surface 30 against the lower concave surface 32 of the actuating element 7 , and the actuating element 7 is then lifted upwards into the rest position.

Correspondingly, the plunger 16 is always moved in the opposite direction of action against the force of the return spring 17 in the downward direction both during a tilting actuation and during the downward actuation of the foot actuation element 7 . According to a predetermined path length, the end face 33 of the plunger 16 engages in the impact face 34 of one or more pivot elements 15 , which then pivot outward about their bearing axis 35 and with the corresponding switch The surface 36 actuates the switching element 14 . The pivoting element 15 is thus designed as a double-sided lever, wherein a first lever arm protrudes below the edge of the plunger 16 and a second lever arm acts on the associated actuating button of the switching element 14 .

The substantially not shown different simultaneous switching can be achieved, for example, by different configurations of the pivot element 15 in such a way that different path lengths of the punch 16 up to engagement are predetermined thereby. This can preferably be achieved by different arrangements of the striking and switching surfaces 34 , 36 of the pivot element 15 relative to one another and/or relative to the associated bearing axis 35 . Likewise preferably, the path length can be adjusted via adjustment elements in the striking and/or switching surfaces 34 , 36 , for example via stop screws. The general mode of function of the actuating drive is not changed by such measures.

List of reference signs

1 round foot switch

2 harness

3 Housing upper part

4 Wire run-through area

5 sealing element

6 sealant

7-pin operating element

8 covers

9 Substrate

10 Switching element housing

11 Pivot element holder

12 Wire guide

13 bolts

14 switching elements

15 Swing element

16 punch blocks

17 return spring

18 Elastic seals

19 Clamping ring

20 Mounting bolts

21 Clamping bracket

22 fastening screw

23 bottom screw

24 Housing Bottom

25 Seals

26 Bottom support

27 retaining screw

28 retaining cap

29 Stop element

30 arched faces

31 Lower cavity edge

32 Lower cavity face

33 end faces

34 impact surface

35 Support axis

36 switch side

Claims (10)

1. Circular foot switch (1), said circular foot switch has at least one switching element (14), said switching element is manipulated by a punching block (16) capable of linear movement, said punching block is fixed in the center The reversible and movable foot control element (7) is coupled, characterized in that the circular foot switch (1) has at least one swing element (15), the swing element is connected with the foot control on the one hand The elements (7) co-operate and on the other hand each co-operate with at least one of the switching elements (14), wherein at least the switching elements (14) are arranged lying down. 2. circular foot switch (1) according to claim 1, is characterized in that, described circular foot switch has at least two switch elements (14), and described switch element is equipped with respectively for manipulation. Oscillating element (15). 3. Circular foot switch (1) according to claim 2, characterized in that the swing elements (15) are identically constructed and arranged so that the at least two switch elements (14) Switch on in the same position of block (16). 4. Circular foot switch (1) according to claim 2, characterized in that the swing elements (15) are constructed and arranged differently, so that the at least two switch elements (14) Switched on in different positions of block (16). 5. The circular foot switch (1) according to any one of claims 1 to 4, characterized in that the at least one pivoting element (15) is a rod. 6. Circular foot switch (1) according to claim 5, characterized in that said at least one oscillating element (15) is a double-sided lever, wherein a first lever arm protrudes to said punch (16) ) and the second lever arm acts on the actuating button of the associated switching element (14). 7. The circular foot switch (1) according to any one of claims 1 to 4, characterized in that the circular foot switch has a housing with a base plate (9) and a shell The upper part of the body (3), the base plate and the upper part of the housing are sealed to each other. 8. The circular foot switch (1) according to claim 7, characterized in that the base plate (9) is connected with at least one switch element accommodation part (10), at least one swing element accommodation part (11) and at least A pin (13) for guiding the plunger (16) is formed in one piece. 9. The circular foot switch (1) according to claim 7, characterized in that an elastic seal (18) seals the gap between the punch (16) and the upper part of the housing (3) . 10. The circular foot switch (1) according to claim 9, characterized in that, the elastic seal (18) is a film seal, and the film seal is connected with the punch block (16) and The upper part (3) of the housing is connected.