JP2002522888A - Switch operating lever unit for switches - Google Patents

Abstract

(57) [Summary] A switch operating lever unit for a switch includes a switch operating lever body (2) to which a contact lever (3) is attached, and a cap () for covering and attaching the switch operating lever body (2). 8) are disposed at opposite ends of the switch operating lever body (2). Further, the switch operating lever unit acts on the contact lever, and is disposed outside the space for accommodating the contact lever and inside the switch operating lever main body, or includes a pulling device mounted and covered on the switch operating lever main body. In addition.

Description

DETAILED DESCRIPTION OF THE INVENTION

The present invention relates to a switch operating lever unit for a switch according to claim 1. The present invention particularly relates to a switch operating lever unit configured to be mounted on a low voltage switch.

From the publication EP 0 560 697 B1, a general switch operating lever unit is known in which a diametrically extending recess penetrates a cylindrical switch operating lever body. Apart from an S-shaped contact lever, a tensioning device, which also acts on the former and is provided with a spring, is contained in said recess. The switch operating lever unit of such a design is rotatably supported in the housing of the power switch by the cylindrical circumferential area of the switch operating lever body.

[0003] From another publication EP 0 314 540 B1, EP 0 560 697
Switch operating lever units having a similar design are known in which the substantial difference from the switch operating lever unit according to B1 is in the specific design of the tensioning device.

It is an object of the present invention to provide a switch operating lever unit that has a longer life and is less susceptible to a discharge generated in a switch space caused by a short circuit.

[0005] This object is achieved by a combination of features as set forth in the dependent claims.

[0006] Further advantageous developments of the invention can be taken from the subclaims.

To achieve the above object according to the present invention, there is provided a switch operating lever unit which covers a switch operating lever main body and has caps mounted laterally on both sides of the switch operating lever main body. is there. In such a design, the bearing friction caused by the function of the switch operating lever unit may be less sensitive to discharges caused by short circuits in the contact space due to the special position of the switch operating lever body. Is limited to

When designing a switch operating lever unit, a pulling device, which is located opposite to both sides of the switch operating lever body and is covered by a cap, may act on the contact lever. The tensioning device therefore houses the contact lever and is housed in a region protected by the cap outside the recess of the switch operating lever body which is exposed to the impact of the discharge caused by the short circuit. With such a configuration, the movable parts of the tensioning device are sufficiently protected, so that the function of the switch operating lever unit is hardly hindered by the influence of the operation.

According to a further development of the switch operating lever unit, the cap is securely connected to both sides of the switch operating lever body by two parts formed diametrically opposite one another. This design allows for quick and secure mounting of the cap. Such a portion is, for example, a protrusion formed inside the cap and engaged with the groove on both sides of the switch operation lever body. In this regard, it is useful to form one of the grooves as a through hole provided in the switch operating lever body that can also be used to accommodate a pin for operating the switch operating lever unit. In this way, a plurality of switch operation lever units arranged in parallel with each other can be operated by a single rod-shaped pin penetrating the switch operation lever body.

In the switch operating lever unit according to the present invention, a tensioning device consisting essentially of two springs extends diametrically parallel to each other on both sides of the switch operating lever body.
Are housed in two tubular grooves. These grooves at the same time form an engaging part for a protrusion suitably provided inside the cap. The arrangement of the grooves should preferably be selected such that the direction of extension of each groove surrounds the line connecting the diametrically opposed engaging portions formed on the switch operating lever body at an angle in the range of 20 to 70 degrees. Must.

In another embodiment of the switch operating lever unit, each part provided for creating a secure connection between the switch operating lever body and the cap is formed on both sides of the switch operating lever body and has a disc-like shape. The projection includes a protrusion configured to engage a recess formed in the cap. These indentations are preferably designed as U-shaped openings in a disc-shaped cap with rib-shaped projections adapted to engage the corresponding slit-shaped grooves of the switch operating lever body projecting from the bottom. Is done.

[0012] In this alternative design of the switch operating lever unit, each cap preferably has two cross grooves on the inside facing towards the respective side of the switch operating lever body,
Regardless of the mounting side of the cap, one of these grooves is always aligned with the tubular groove of the switch operating lever body.

In all embodiments of the switch operating lever unit, each cap preferably supports the switch operating lever body on the outside and has a diameter which is considerably smaller than the diameter of the switch operating lever body having its own cylindrical design. Including bearing journals. Thus, the risk of the bearing position of the switch operating lever unit being disturbed by a discharge caused by a short circuit in the contact space of the switch is greatly eliminated, while at the same time the friction at the bearing position is minimized.

Another combination solution of the object according to the invention also relates to a switch operating lever in which the tensioning device is arranged outside the space for accommodating the contact lever inside the switch operating lever body or covered in the switch operating lever body. -Achieved by the unit. The covered configuration of the pulling device is achieved in certain cases by a removable cap on the switch operating lever body.

Hereinafter, the present invention will be described in detail by two embodiments with reference to the drawings.

A low-voltage switch, not shown in detail in FIG. 1, improves the housing 11, the switch operating lever unit 9 contained in the housing, the arc chamber, the current carrying conductor 16 and furthermore the extinction of the arc. And a member. The housing 11 of the arc extinguishing means is mounted in the housing of a low-voltage switch, not shown in detail. The switch operating lever unit 9 serves to make an electrical connection between the two current carrying conductors 16.

The switch operating lever unit 9 includes a cylindrical switch operating lever main body 2 in which a substantially S-shaped contact lever 3 is rotatably supported by a bearing shaft 5 mounted therein. The entire switch operating lever unit 9 is rotatably supported in a receiving portion (not shown) of the housing 11. This particular type of support will be described in detail within the following expression of the structural design of the switch operating lever unit.

The switch operating lever unit 9 can be operated by a joint 10 to obtain an on state shown in FIG. 1 and an off state shown in FIG.

As can be seen in detail from FIG. 3 a, the switch operating lever unit 9 comprises a switch operating lever body 2 having a rotationally symmetric, substantially cylindrical design. The axis of the cylindrical switch operation lever main body 2 coincides with the geometric axis direction of the bearing shaft 5 on which the contact lever 3 is movably supported. The contact lever 3 is accommodated in a recess 2 e extending in a direction perpendicular to the axis of the switch operating lever body 2, and the recess passes through the switch operating lever body 2 in the diameter direction.

Tubular grooves 2 c extending parallel to each other in the diameter direction are provided on both surfaces of the cylindrical switch operation lever main body 2. U-shaped slits 2d provided for accommodating the pins 6 at both ends of the tubular groove 2c are formed in the wall between the central recess 2e and the bottom of each groove 2c. A roller 6a slidably accommodated in the recess 2e is rotatably supported at substantially the center of each pin 6. A spring 7 is accommodated in the tubular groove 2c. The spring 7 has both ends hung on both ends of a tension pin on each surface of the switch operation lever main body 2. The length of the slit 2d is smaller than the width of the central bearing portion of the S-shaped contact lever 3 so that the pin 6 does not hit the bottom of the U-shaped slit 2d regardless of the operation state of the switch. Its dimensions are determined. When the switch operating lever main body 2 is twisted, the roller 6a of the pin 6 is turned into an S-shaped contact lever 3.
Respectively, so as to be pulled apart in the slit 2d against the force of the spring 7 and the tension pin 6 is formed to exert a counterclockwise permanent tension on the contact lever 3. ing.

The switch operation lever main body 2 further has a receiving hole 2b in which the rod-shaped pin 1 is accommodated. A U-shaped recess 2a is formed on both surfaces of the switch operation lever main body 2 in a diametric direction so as to face the receiving hole 2b.

Caps 8 are provided on both sides of the cylindrical switch operation lever main body 2.
Each cap 8 includes a collar portion 8e having a cylindrical circumference, and a pair of substantially diametrically extending reinforcing ribs 8c therein and a U-shaped rib portion 8 formed independently thereof.
a. The stiffening ribs also serve to increase the creep distance and air gap of the switch's arc extinguishing means.

A diametrically extending groove 8 i is formed inside the cap 8 between the reinforcing ribs 8 c of each cap 8. The cap is arranged at the time of attachment to the switch operation lever main body 2 so that each of the grooves 8i faces the slit 2d of the switch operation lever main body 2 and accommodates both ends of the pin 6 as a support. Therefore, the groove 8i effective in the configuration such as the axial restriction of the pin 6 functions as a guide for the pin 6 during the movement operation in the slit 2d, and the pin is effectively prevented from being entangled in the slit 2d.

When the respective caps 8 are arranged on the corresponding surfaces of the switch operating lever body 2, the portions 8 c and 8 a are formed in the tubular groove 2 c and the U-shaped recess 2 a formed on the edge of the switch operating lever body 2. Each is surely connected.

Further, the cap 8 has an opening formed by a cylindrical portion 8b extending inside the cap. The cylindrical portion 8b is diametrically opposed to the protruding U-shaped rib portion 8a, and has an outer diameter substantially corresponding to the inner diameter of the receiving hole 2b formed in the switch operating lever body 2. The angle between the diameter drawn temporarily between the rib 8c of the line connecting the center of the cylindrical portion 8b and the U-shaped rib portion 8a is the center of the line connecting the recess 2a and the receiving hole 2b and the center of the tubular groove 2c. It is the same angle as the line makes. This angle is in principle in the range from 20 degrees to 70 degrees, but is preferably about 65 degrees.

A pin-shaped shaft neck 8d is provided on a side diametrically opposed to the opening of the cylindrical portion 8b on the outside of the cap 8, that is, behind the U-shaped rib portion 8a. The shaft neck 8d serves as a mounting protection so that the switch operating lever body 2 can be correctly mounted in the housing 11 of the switch (not shown in detail here).

Each of the caps 8 has an outer bearing journal 8 f that functions to axially support the switch operating lever unit 9 in a receiving portion of the switch housing 11 (not shown). Switch operation lever body 2 on the outside front of each cap
Two diametrically opposed openings 8g are formed which serve to alleviate the pressure. One of the caps 8 marks the correct mounting position of the cap on the collar portion 8e, and simultaneously the slit 2d and the roller 6 in the switch operating lever body 2
a includes a protruding portion 8h serving as a circumferential cover.

When the switch operating lever unit 9 is mounted, first, the contact lever 3 is fitted into the depression 2 e of the switch operating lever main body 2, and the pin 5 serving as a joint shaft is externally connected to the switch operating lever main body 2. In detail, it is pushed through the bearing hole of the contact lever 3 (not shown). Next, the pin 6 is inserted into the slit 2d, and is attached to both ends of the switch operation lever body by hanging the spring 7 on both ends of the pin while slightly extending the spring. Thereafter, the U-shaped rib portion 8a, the rib 8c, and the cylindrical portion 8b provided inside the cap are properly fitted to the U-shaped recess 2a, the tubular groove 2c, and the receiving hole 2b. Then, the two caps 8 are pressed against both sides of the switch operation lever main body 2. The raised portions 8a, 8c and 8b can be inserted on both sides of the switch operating lever body 2 with a slight pressing force, so that no other means is required for fixing these caps to the switch operating lever body. , Cap 8 is preferably made of a synthetic material.

The switch operating lever unit 9 assembled in this way is inserted so that the axially extending bearing journals 8f on both sides of the switch operating lever unit are inserted into the bearing portions of the corresponding contoured receiving portions. The arc extinguishing means, which is not shown in detail in FIG. Then, FIG.
Is arranged outside the housing 11 and the rod-shaped pin 1 is
The cap 8 is inserted into the small hole formed at the lower end of the zero and the opening of the cylindrical portion of the cap 8 aligned with the small hole.

FIGS. 4 a and 4 b show another embodiment of the switch operating lever unit 9 according to the invention. This embodiment of the switch operating lever unit is shown in FIGS. 3a and 3b
The design of each surface of the switch operation lever body and the cap is considerably different from that of the first embodiment shown in FIG.

The switch operating lever body 22 shown in FIGS. 4a and 4b includes a recess 22e extending perpendicularly to the axis of the switch operating lever body, in which a contact lever 23 including a contact member 24 is accommodated, and the lever is provided. 23 is supported by pins 25. As in the first embodiment, as shown in FIG. 1, when the extended cylindrical portion 26a of the pin 26 comes into contact with the top of the S-shaped contact lever 23 and the switch operation lever main body 22 is rotated counterclockwise. Exerts elastic pressure on the contact lever in the closed position. This mechanism has already been described with respect to the first embodiment.

Two substantially rectangular protrusions 22 a and 22 b are formed on each surface of the switch operation lever main body 22 so as to face each other in a diametrical direction. Switch operation lever body 22
Projecting portions 22b formed on both surfaces of the switch operating lever main body 22 for accommodating the rod-shaped pin 21 form a runout of a hole portion provided in the switch operating lever main body 22, and are formed diametrically opposed to the projecting portion 22b. Only the opening 22g is formed in the projected portion 22a. A tubular groove 22c for accommodating the spring 27 is provided between the protrusions 22a and 22b. On each surface of the switch operation lever main body 22, a slit-like groove 22f is formed along the side surface of the protruding portions 22a and 22b.

A plate-like cap 2 made of a flat material on both sides of the switch operation lever body 22
8 is attached. These caps are substantially flat disks, and have diametrically opposed openings 28a, 28b for accommodating the projections 22a, 22b formed on the respective surfaces of the switch operation lever main body 22 and suitable for disposing the caps. including.
The U-shaped openings 28a, 28b have, in their bottom region, lengths of openings 28a, 28b.
Includes a portion 28c bent toward the mounting side of the cap 28 corresponding to the width of the cap 28. Portion 28c is configured to be inserted into slit-like groove 22f to secure the cap to each surface of switch operating lever body 22, and at the same time serves to increase the creep distance and air gap of the switch. .

Each of the inner surfaces of the cap 28 facing the front surface of the switch operation lever main body 22 is configured to house a part of the spring 27 projecting outward from the front surface of the switch operation lever main body. An X-shaped groove 28e is formed. With an X-shape, it can be placed on either front. With this design of the groove 28e,
Caps 28 arranged on both sides of the switch operation lever main body 22 can be replaced. As can be seen from FIG. 4 b, the diameter of the plate-like cap 28 corresponds to the diameter of the cylindrical switch operating lever body 22, and thus, when installed, the edge of the cap 28 has the cylindrical shape of the switch operating lever body 22. Is flush with the circumferential area of

On the outside of each of the caps 28 there is provided a bearing journal 28f for pivotally supporting the switch operating lever unit in a suitably designed bearing part of the housing 11 not shown in detail in FIG. ing.

The design of the switch operating lever unit illustrated in detail above has the function of simultaneously supporting the switch operating lever unit having a simple structure in the switch housing, and the function of the switch operating lever body from discharging in the event of flashover. It guarantees the function of reliably protecting moving parts inside. Furthermore, in the case of a single-pole switch, a drive (not shown in detail) is connected to the switch operation lever unit. In the case of a multi-pole switch, the drive is connected to the switch operation lever unit, and the switch operation lever is connected. The creep distance and the air gap from the contact lever 3, spring 7 and pin 6 to the rod-shaped pin 1 interconnecting the units are increased. The cap is designed to ensure a reliable connection with the switch operating lever body. This prevents the gas evolved in the event of a short circuit from reaching the moving parts of the switch and the switch operating lever unit, ensuring that the shielding for the adjacent switch unit is enhanced.

There is no possibility of incorrect installation of the cap. This is because the cap is clearly identifiable from the outside and can therefore be assigned to a particular side of the switch operating lever body, or if it has the same shape but in that case any front of the switch operating lever body It is because it can be arranged in.

In an embodiment of the switch unit according to the invention, not shown in detail, the tensioning device is housed outside the area of the recesses 2 e, 22 e for housing the contact levers, but is protected inside the switch operating lever body. In this way, a removable cap can be omitted to simplify the manufacturing.

[Brief description of the drawings]

FIG. 1 is a partial view of a housing of an arc extinguishing device of a low voltage switch to which a switch operating lever unit according to the present invention is attached.

FIG. 2 is a view in which a switch of a switch operation lever unit of FIG. 1 is turned off.

FIG. 3a is a partially exploded perspective view of a first embodiment of the switch operating lever unit according to the present invention.

FIG. 3b is a view of the switch operating lever unit of FIG. 3a in a partially assembled state.

FIG. 4a is a partially exploded perspective view of a second embodiment of the switch operating lever unit according to the present invention.

FIG. 4b is a partially assembled view of the switch operating lever unit of FIG. 4a.

──────────────────────────────────────────────────続 き Continuation of front page (81) Designated country EP (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE ), OA (BF, BJ, CF, CG, CI, CM, GA, GN, GW, ML, MR, NE, SN, TD, TG), AP (GH, GM, KE, LS, MW, SD, SL, SZ, UG, ZW), EA (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM), AE, AL, AM, AT, AU, AZ, BA, BB, BG, BR , BY, CA, CH, CN, CU, CZ, DE, DK, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS , JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, UA, UG, US, UZ, VN, YU, ZA, ZW (72) Inventor Kranz, Stephan Germany D-24534, Neumünster Berliner Platz, 2-6, AAG, Niederspägnün, Güstenik, GAEMBAHER, COMPANI Cargage F-term (reference) 5G030 AA01 FB12 XX00 YY05

Claims (15)

[Claims] 1. A switch operating lever unit for a switch including a switch operating lever body (2; 22) and a contact lever (3; 23) attached to the switch operating lever body, wherein the switch operating lever is provided. The cap (8; 28) for covering and attaching to the main body (2; 22) is provided with the switch operating lever main body (2; 2).
2) a switch operating lever which is arranged on both sides facing each other;
unit. 2. A pulling device (7, 2d), which is arranged on opposite sides of said switch operating lever body (2; 22) and is covered by said cap (8; 28), comprises a connecting point lever (3; 23). The switch operation lever unit according to claim 1, wherein the switch operation lever unit acts on the switch operation lever unit. 3. The switch operating lever body (3), wherein the cap (8; 28) is
2. The switch operating lever unit according to claim 1, wherein the two opposing ends of the switch operating levers are firmly connected to each other by two parts formed diametrically opposite one another. 4. A projection formed inside said cap (8) such that said part engages with grooves (2a, 2b) provided at opposite ends of said switch operating lever body (2). The switch operation lever unit according to claim 3, wherein the switch operation lever unit is a part (8a, 8b). 5. One of the grooves is formed by a through hole (2b) provided in the switch operating lever body (2) for receiving a pin (1) for operating the switch operating lever unit. The switch operation lever unit according to claim 4, wherein: 6. A diametrically extending tubular groove (2c) in said switch operating lever body (2) for accommodating said pulling device (7, 2d), and inside each cap (8). The switch operating lever unit according to claim 4 or 5, further comprising two separate projections (8c) provided. 7. The switch operating lever body (22) is configured to engage with protrusions (22a, 22b) provided at opposite ends of the switch operating lever body (22).
The switch operating lever unit according to claim 3, characterized in that it is an opening (28a, 28b) formed in the cap (8). 8. The recess forms a U-shaped opening of a disc-shaped cap (28), and a corresponding slit-shaped groove (22f) of the switch operating lever body (22).
A switch operating lever unit according to claim 7, characterized in that a bend (28c) adapted to engage with the base extends from the bottom of the U-shaped opening. 9. The switch operating lever body (22) for receiving the tensioning device (26, 27), comprising a tubular groove (22c) extending diametrically in the switch operating lever body (22). Switch operating lever unit as described. 10. The groove (2c; 22c) in the extension direction is provided in the groove (2a; 2c).
Switch operating lever unit according to claim 6 or 9, characterized in that it comprises an angle in the range from 20 to 70 degrees forming a line connecting b) and / or the projections (22a, 22b) with each other. 11. Each of the caps (28) is connected to the switch operating lever body (2).
2) having on its inside an X-shaped groove (28e) facing each end, so that said groove (28e) is independent of the mounting side of said cap (28), said tubular groove (22c) The switch operating lever unit according to claim 9, wherein the position can be always adjusted so as to overlap with the switch operating lever unit. 12. The device according to claim 1, wherein each of the caps includes a bearing journal for mounting the switch operating lever body on the outside. A switch operating lever unit according to any one of the preceding claims. 13. A switch operating lever body (2; 22) and a contact lever (3; 2) mounted in a recess (2e; 22e) of the switch operating lever body.
3) and a switch operating lever unit for a switch including a pull device (6, 7; 26, 27) acting on the contact lever, wherein the pull device (7, 2d).
Is located outside the space (2e; 22e) for accommodating the contact lever (3) and disposed inside or covered by the switch operation lever body (2e; 22e). Switch operating lever unit for the installed switch. 14. The pulling device (6, 7; 26, 27) is configured to be covered on both outer sides of the switch operating lever body (2) opposite to each other, and the switch operating lever body is provided with a bearing journal ( The switch operating lever unit according to claim 13, wherein the switch operating lever unit comprises 8f; 15. The switch operating lever body (2) is rotationally symmetric, the pulling device (6, 7; 26, 27) can be fixed to the outside and the bearing journal (8)
15. Switch operating lever unit according to claim 13 or 14, covered by two caps (8; 28) capable of supporting f; 28f).