CN220439502U - Relay device - Google Patents

Abstract

The utility model belongs to the technical field of piezoelectric devices, and discloses a relay. The relay comprises an iron piece, wherein the iron piece comprises an iron core part, a connecting part and a yoke part which are integrally connected, and the iron core part and the yoke part are respectively arranged at two ends of the connecting part; the iron core surface of the iron core part and the yoke surface of the yoke part are positioned on the same plane; the coil skeleton includes first equipment board, bobbin and second equipment board, and first equipment board and second equipment board locate the both ends mouth of pipe department of bobbin respectively, and the iron core portion wears to establish in the bobbin and stretches out, and connecting portion stops in the outer wall surface of second equipment board. The utility model avoids the cracking of the iron core part and the yoke part or the generation of alternating current sound and noise caused by the fact that the iron core surface and the yoke surface are not on the same plane, and improves the yield of the relay.

Description

Relay device

Technical Field

The utility model relates to the technical field of piezoelectric devices, in particular to a relay.

Background

The electromagnetic AC relay mainly comprises a base component, an electromagnetic system, a contact system and a shell, wherein the base component is provided with a base, a static reed and a connecting sheet, the electromagnetic system is provided with a coil, a yoke iron, an iron core component and a short circuit ring (used for AC), and the coil is provided with a coil skeleton, the connecting sheet and an enameled wire.

In the prior art, an iron core and a short circuit ring are riveted together to form an iron core assembly, and then the iron core assembly and a yoke are fixed through riveting, and the scheme has the following defects:

in the riveting process of the iron core component and the yoke iron, the surface of the iron core is a stress point, the phenomenon that the surface of the iron core is riveted and pressed and the surface of the yoke iron is not on the same plane is easy to occur, the subsequent assembly of the relay is caused to be followed by the phenomena of slotting of an electromagnetic system, alternating current sound and the like, and the product is directly scrapped.

Disclosure of Invention

The utility model aims to provide a relay, wherein an iron core and a yoke are of an integrated structure, riveting is not needed between the iron core and the yoke, and the iron core surface and the yoke surface of the structure are on the same plane, so that the cracking of the iron core and the yoke or the generation of alternating current sound and noise caused by the fact that the iron core surface and the yoke surface are not on the same plane is avoided, and the yield of the relay is improved.

To achieve the purpose, the utility model adopts the following technical scheme:

a relay, comprising:

the iron piece comprises an iron core part, a connecting part and a yoke part which are connected integrally, wherein the iron core part and the yoke part are respectively arranged at two ends of the connecting part and are positioned at the same side of the connecting part; the iron core surface of the iron core part and the yoke surface of the yoke part are positioned on the same plane;

the coil framework comprises a first assembling plate, a winding tube and a second assembling plate, wherein the first assembling plate and the second assembling plate are respectively arranged at pipe orifices at two ends of the winding tube, the iron core part penetrates through the winding tube and stretches out, and the connecting part is stopped on the outer wall surface of the second assembling plate.

As an alternative scheme of the relay, a positioning clamping groove is concavely formed in the outer wall surface of the second assembling plate, and the connecting part is clamped in the positioning clamping groove.

As the alternative scheme of relay, the relay still includes the short circuit ring, the iron core portion is kept away from the one end of connecting portion is equipped with first spacing end, iron core face and second spacing end, the iron core face with form first riveting groove between the first spacing end, the iron core face with form the second riveting groove between the second spacing end, the short circuit ring cover is located the iron core face and with first riveting groove with the riveting of second riveting groove, the short circuit ring stop in the outer wall surface of first equipment board, the iron core face is kept away from the one end of connecting portion stretches out the short circuit ring.

As an alternative scheme of the relay, two opposite inner side walls of the bobbin are respectively provided with a protruding structure, and the outer wall surface of the iron core part is clamped between the two protruding structures.

As the alternative scheme of relay, the relay still includes base and first locating pin, the base is equipped with first jack, second jack and third jack, first jack with the perpendicular intercommunication of second jack, the third jack with the perpendicular intercommunication of second jack has been seted up first jack and the second jack of perpendicular intercommunication, the second package board is kept away from the one end of bobbin is equipped with first grafting portion, first grafting portion is equipped with spacing hole, first grafting portion inserts and locates in the first jack, first locating pin inserts and locates in the second jack with spacing hole.

As the alternative scheme of relay, the spacing hole is relative the height of base bottom surface is greater than the second jack is relative the height of base bottom surface, first locating pin includes first location section and second location section, first location section with the second location section links to each other and is L shape, first location section inserts and locates the second jack with in the spacing hole, the second location section inserts and locates in the second jack.

As an alternative scheme of the relay, at least one surface of the first locating pin, which is arranged in the limiting hole and the second jack, is provided with a first protruding rib, and the first protruding rib is abutted with the limiting hole and/or the second jack.

As the alternative scheme of relay, the relay still includes the second locating pin, first location section is equipped with dislocation breach, the longitudinal cross section area of second location section is less than the hole area of second jack, the second locating pin inserts and locates the second jack with in the spacing hole.

As an alternative scheme of the relay, the second locating pin comprises a third locating section and a fourth locating section, the third locating section is connected with the fourth locating section to be L-shaped, the third locating section is inserted into the second jack and the dislocation notch, and the fourth locating section is inserted into the second jack.

As an alternative scheme of the relay, the second positioning pin is arranged on at least one surface of the dislocation gap and the second jack, and is provided with a second protruding rib, and the second protruding rib is abutted with the dislocation gap and/or the second jack.

As an alternative scheme of the relay, one end of the first assembling plate is provided with a second inserting part, the other end of the first assembling plate is provided with a supporting lug, the second inserting part is clamped with a limiting rib on the base, and the supporting lug is abutted to the yoke part.

Compared with the prior art, the utility model has the beneficial effects that:

according to the relay provided by the utility model, the iron core part and the yoke part are connected into an integrated structure by adopting the connecting part, the iron core surface and the yoke surface are arranged on the same plane, so that the integral structural strength of an iron piece is improved, the riveting and fixing procedures of the iron core part and the yoke part are reduced, the surface smoothness of the iron core part is ensured, the alternating current sound generated after the iron core part and the yoke part are cracked is avoided, and the yield of the relay is improved; the iron core part is arranged in the bobbin in a penetrating way, the front end of the iron core part extends out of the bobbin, and the front end of the iron core part can be attracted with or separated from the armature of the relay; the connecting part is stopped on the outer wall surface of the second assembling plate, the length of the iron core part inserted into the bobbin is limited, and the iron core part is ensured to be firmly mounted on the coil framework.

Drawings

FIG. 1 is a first exploded view of a relay according to an embodiment of the present utility model;

FIG. 2 is a second exploded view of a relay according to an embodiment of the present utility model;

FIG. 3 is an assembly view of a relay according to an embodiment of the present utility model from a first perspective;

fig. 4 is an assembly view of a relay according to an embodiment of the present utility model from a second perspective;

FIG. 5 is a schematic view of the iron structure in an embodiment of the present utility model;

FIG. 6 is a schematic view of a coil skeleton in an embodiment of the utility model;

FIG. 7 is a schematic view of a first positioning pin according to an embodiment of the present utility model;

FIG. 8 is a schematic diagram of a structure in which second protruding ribs are disposed on left and right sides of a second positioning pin according to an embodiment of the present utility model;

FIG. 9 is a schematic diagram of a structure in which a second protruding rib is disposed on a top surface of a second positioning pin according to an embodiment of the present utility model;

FIG. 10 is a schematic view of a first view of a base according to an embodiment of the present utility model;

fig. 11 is a schematic structural view of the base at a second view angle in an embodiment of the utility model.

In the figure:

1. an iron piece; 2. a coil bobbin; 3. a shorting ring; 4. a base; 5. a first positioning pin; 6. a second positioning pin;

11. an iron core part; 111. the first limiting end; 112. an iron core surface; 113. the second limiting end; 114. a first rivet groove; 115. a second rivet groove; 12. a connection part; 13. a yoke part; 116. a yoke surface;

21. a first assembly plate; 22. a bobbin; 221. a bump structure; 23. a second assembly plate; 24. positioning clamping grooves; 25. a first plug-in connection; 251. a limiting hole; 26. a second plug-in connection; 27. a support ear;

41. a first jack; 42. a second jack; 43. a limit rib; 44. a third jack;

51. a first positioning section; 511. a dislocation notch; 52. a second positioning section; 53. the first protruding ribs;

61. a third positioning section; 62. a fourth positioning section; 63. and the second protruding ribs.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

In order to avoid riveting between the iron core and the yoke, and avoid cracking of the iron core and the yoke or alternating current sound or noise generated by the fact that the iron core surface and the yoke surface are not on the same plane, the yield of the relay is improved, and the relay is provided in the embodiment, as shown in fig. 1 to 11.

In the present embodiment, the relay includes an iron member 1 and a bobbin 2. The iron member 1 includes an iron core 11, a connecting portion 12 and a yoke portion 13 connected in this order, wherein the iron core 11 and the yoke portion 13 are respectively disposed at both ends of the connecting portion 12 and are located at the same side of the connecting portion 12. The core surface 112 of the core portion 11 is flush with the yoke surface 116 of the yoke portion 13. The coil skeleton 2 includes first equipment board 21, bobbin 22 and second equipment board 23, and first equipment board 21 and second equipment board 23 locate the both ends mouth of pipe department of bobbin 22 respectively, and iron core portion 11 wears to establish in the bobbin 22 and stretches out, and connecting portion 12 stop in the outer wall surface of second equipment board 23, yoke portion 13 and iron core portion 11 are parallel and the interval sets up.

In short, according to the relay provided by the utility model, the iron core 11, the connecting part 12 and the yoke part 13 are of an integrated structure, the iron core surface 112 of the iron core 11 and the yoke surface 116 of the yoke part 13 are on the same plane, so that the integral structural strength of the iron piece 1 is improved, the riveting and fixing procedures of the iron core 11 and the yoke part 13 are reduced, the surface smoothness of the iron core 11 is ensured, the alternating current sound generated after the iron core 11 and the yoke part 13 are cracked is avoided, and the yield of the relay is improved; the iron core 11 is penetrated in the bobbin 22 and extends the front end of the iron core 11 out of the bobbin 22, and the front end of the iron core 11 can be attracted to or separated from the armature of the relay; the connection portion 12 is stopped at the outer wall surface of the second assembling plate 23, and the yoke portion 13 is parallel to the core portion 11 and is located on the same side of the connection portion 12, limiting the length of the core portion 11 inserted into the bobbin 22, ensuring that the core portion 11 is stably mounted to the bobbin 2.

Further, the outer wall surface of the second assembling plate 23 is concavely provided with a positioning slot 24, and the connecting portion 12 is clamped in the positioning slot 24. After the iron core 11 is inserted into the bobbin 22 of the bobbin 2, the connection portion 12 of the iron member 1 is engaged with the positioning groove 24, so that the connection between the iron member 1 and the bobbin 2 is improved.

Further, the relay further comprises a short circuit ring 3, a first limiting end 111, an iron core surface 112 and a second limiting end 113 are arranged at one end, far away from the connecting portion 12, of the iron core portion 11, a first riveting groove 114 is formed between the iron core surface 112 and the first limiting end 111, a second riveting groove 115 is formed between the iron core surface 112 and the second limiting end 113, the short circuit ring 3 is sleeved on the iron core surface 112 and is riveted with the first riveting groove 114 and the second riveting groove 115, the short circuit ring 3 is stopped on the outer wall surface of the first assembling plate 21, and one end, far away from the connecting portion 12, of the iron core surface 112 extends out of the short circuit ring 3. The front end of the iron core part 11 is fixed by riveting through the short circuit ring 3, the rear end of the iron core part 11 is limited by adopting the positioning clamping groove 24, the installation firmness of the iron core part 11 on the coil skeleton 2 is ensured, and the shock resistance of the relay is improved.

Illustratively, the shorting ring 3 is made of metallic copper, and when the coil is wound around the outer wall surface of the bobbin 22 and ac power is supplied thereto, the shorting ring 3 suppresses ac sound (sound generated by beating when the armature is opened from the core portion 11) of the ac relay.

Further, the spool 22 is provided with protruding structures 221 on both inner side walls thereof, and the outer wall surface of the core 11 is sandwiched between the protruding structures 221. In the present embodiment, the protrusion structures 221 are elongated, and by adding the protrusion structures 221, the interval between the two protrusion structures 221 is not greater than the width of the core portion 11, so that the core portion 11 is firmly inserted into the bobbin 22.

Further, the relay further comprises a base 4 and a first positioning pin 5, the base 4 is provided with a first jack 41, a second jack 42 and a third jack 44, the first jack 41 is vertically communicated with the second jack 42, the third jack 44 is vertically communicated with the second jack 42, one end, far away from the bobbin 22, of the second assembling plate 23 is provided with a first inserting portion 25, the first inserting portion 25 is provided with a limiting hole 251, the first inserting portion 25 is inserted into the first jack 41, and the first positioning pin 5 is inserted into the second jack 42 and the limiting hole 251. Illustratively, the first jack 41 is disposed on the upper surface of the base 4, the third jack 44 is disposed on the lower surface of the base 4, the first plug-in portion 25 of the coil bobbin 2 is inserted into the first jack 41 of the base 4 from top to bottom, the limit hole 251 is partially overlapped with the second jack 42, and the first positioning pin 5 is horizontally inserted into the second jack 42 and the limit hole 251. When the disassembly is required, a screwdriver is inserted into the third insertion hole 44, and the first positioning pin 5 is pried out of the base 4.

Further, the height of the limiting hole 251 relative to the bottom surface of the base 4 is greater than the height of the second jack 42 relative to the bottom surface of the base 4, the first positioning pin 5 includes a first positioning section 51 and a second positioning section 52, the first positioning section 51 and the second positioning section 52 are connected in an L shape, the first positioning section 51 is inserted into the second jack 42 and the limiting hole 251, and the second positioning section 52 is inserted into the second jack 42. Because the heights of the limiting holes 251 and the second insertion holes 42 are different, the positions of the coil frameworks 2 relative to the base 4 can be further limited by using the L-shaped first positioning pins 5, so that the coil frameworks 2 are ensured not to displace relative to the base 4.

Further, at least one surface of the first positioning pin 5 placed in the limit hole 251 and the second jack 42 is provided with a first protruding rib 53, and the first protruding rib 53 abuts against the limit hole 251 and/or the second jack 42. By adding the first protruding ribs 53, the extrusion force to the wall surface of the hole after the first positioning pin 5 is inserted into the hole can be increased, the friction force between the first positioning pin and the hole is increased, and the limiting stability is improved.

In some application scenarios, the outer wall surface of the first positioning section 51 is provided with a first protruding rib 53, the first protruding rib 53 is provided with a rounded corner, and the first protruding rib 53 abuts against the inner wall surface of the limiting hole 251. Illustratively, a plurality of first protruding ribs 53 are protruding on the lower surface of the first positioning section 51, so as to improve the appropriate pressing force between the first positioning pin 5 and the limiting hole 251, and further avoid the displacement of the coil bobbin 2 relative to the base 4 in the up-down direction.

Further, the relay further comprises a second positioning pin 6, the first positioning section 51 is provided with a dislocation notch 511, the longitudinal section area of the second positioning section 52 is smaller than the inner hole area of the second jack 42, and the second positioning pin 6 is inserted into the second jack 42 and the limiting hole 251. Because the first positioning section 51 is provided with the dislocation notch 511, the second positioning pin 6 is conveniently inserted into the limiting hole 251, so that the first positioning pin 5 and the second positioning pin 6 are mutually restrained, and the position locking is ensured to be firm.

Further, the second positioning pin 6 includes a third positioning section 61 and a fourth positioning section 62, the third positioning section 61 is connected with the fourth positioning section 62 to form an L shape, the third positioning section 61 is inserted into the second insertion hole 42 and the limiting hole 251, a part of the third positioning section 61 is located in the dislocation notch 511, and the fourth positioning section 62 is inserted into the second insertion hole 42. Because the height of the limiting hole 251 is different from that of the second jack 42, the position of the coil frame 2 relative to the base 4 can be further limited by using the L-shaped second positioning pin 6, so that the coil frame 2 is ensured not to displace relative to the base 4.

Further, at least one surface of the second positioning pin 6 placed in the dislocation gap 511 and the second insertion hole 42 is provided with a second protruding rib 63, and the second protruding rib 63 abuts against the dislocation gap 511 and/or the second insertion hole 42. Through addding the protruding rib 63 of second, can increase the extrusion force to pore wall face and dislocation breach 511 lateral wall after the second locating pin 6 inserts in the hole, increase the frictional force between the two, improve spacing steadiness. Further, the second protruding rib 63 is a triangular rib.

Illustratively, as shown in fig. 8, second protruding ribs 63 are provided on the left and right sides of the second positioning pin 6, further restricting displacement of the first positioning pin 5 and the second positioning pin 6 in the left-right direction.

Illustratively, as shown in fig. 9, the second protruding ribs 63 are provided on the upper surface of the second positioning pins 6, further avoiding displacement of the bobbin 2 in the up-down direction with respect to the base 4.

Further, as shown in fig. 3 and fig. 6, one end of the first assembling plate 21 is provided with a second inserting portion 26, the other end of the first assembling plate 21 is provided with a supporting lug 27, the second inserting portion 26 is clamped with a limiting rib 43 on the base 4, and the supporting lug 27 is abutted with the yoke portion 13. Through add second grafting portion 26 and supporting ear 27 respectively at the both ends of first tooling plate 21, make iron member 1, coil skeleton 2 and base 4 three firm in connection, improve shock resistance, reduce the relay and produce alternating current sound.

In summary, the electromagnetic system is assembled in the following manner: after the iron core part 11 is inserted into the coil framework 2, the iron core part 11 is riveted with the short circuit ring 3, the first limiting ends 111 and the second limiting ends 113 on the left side and the right side of the iron core part 11 are opened and deformed to be fixed together, the surface of the short circuit ring 3 is a stress point, the flatness of the surface of the middle iron core surface 112 of the iron core part 11 is not damaged, and the riveting and fixing process of the iron core part 11 and the yoke part 13 can be reduced; the electromagnetic system and the base assembly are assembled in the following way: after the coil framework 2 and the base 4 on the electromagnetic system are inserted, the coil framework is fixed by the positioning pins, the number of the positioning pins is two, the first positioning pins 5 are inserted into the relay to be in a detachable state, then the performance parameters of the relay are detected, if the detection is unqualified, the first positioning pins 5 are withdrawn out through the third insertion holes 44 at the bottom of the base 4 to be adjusted, and if the performance parameters are detected to be qualified, the second positioning pins are inserted, and the relay is in an undetachable state.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (11)

1. A relay, comprising:

the iron piece (1) comprises an iron core part (11), a connecting part (12) and a yoke part (13) which are integrally connected, wherein the iron core part (11) and the yoke part (13) are respectively arranged at two ends of the connecting part (12) and are positioned at the same side of the connecting part (12); an iron core surface (112) of the iron core part (11) and a yoke surface (116) of the yoke part (13) are positioned on the same plane;

coil skeleton (2), including first equipment board (21), bobbin (22) and second equipment board (23), first equipment board (21) with second equipment board (23) are located respectively the both ends mouth of pipe department of bobbin (22), iron core portion (11) wear to establish in bobbin (22) and stretch out, connecting portion (12) stop in the outer wall surface of second equipment board (23).

2. Relay according to claim 1, characterized in that the outer wall surface of the second assembly plate (23) is concavely provided with a positioning clamping groove (24), and the connecting part (12) is clamped in the positioning clamping groove (24).

3. The relay according to claim 1, further comprising a short circuit ring (3), wherein one end of the iron core part (11) away from the connecting part (12) is provided with a first limiting end (111), an iron core surface (112) and a second limiting end (113), a first riveting groove (114) is formed between the iron core surface (112) and the first limiting end (111), a second riveting groove (115) is formed between the iron core surface (112) and the second limiting end (113), the short circuit ring (3) is sleeved on the iron core surface (112) and riveted with the first riveting groove (114) and the second riveting groove (115), the short circuit ring (3) is stopped on the outer wall surface of the first assembling plate (21), and one end of the iron core surface (112) away from the connecting part (12) extends out of the short circuit ring (3).

4. Relay according to claim 1, wherein the bobbin (22) is provided with protruding structures (221) on both of opposite inner side walls, and the outer wall surface of the core portion (11) is sandwiched between the protruding structures (221).

5. The relay according to any one of claims 1 to 4, further comprising a base (4) and a first positioning pin (5), wherein the base (4) is provided with a first jack (41), a second jack (42) and a third jack (44), the first jack (41) is vertically communicated with the second jack (42), the third jack (44) is vertically communicated with the second jack (42), a first plugging portion (25) is arranged at one end, far away from the bobbin (22), of the second assembling plate (23), a limiting hole (251) is arranged at the first plugging portion (25), the first plugging portion (25) is plugged into the first jack (41), and the first positioning pin (5) is plugged into the second jack (42) and the limiting hole (251).

6. The relay according to claim 5, wherein the height of the limiting hole (251) relative to the bottom surface of the base (4) is greater than the height of the second jack (42) relative to the bottom surface of the base (4), the first positioning pin (5) comprises a first positioning section (51) and a second positioning section (52), the first positioning section (51) is connected with the second positioning section (52) to be L-shaped, the first positioning section (51) is inserted into the second jack (42) and the limiting hole (251), and the second positioning section (52) is inserted into the second jack (42).

7. Relay according to claim 6, characterized in that at least one surface of the first positioning pin (5) placed in the limiting hole (251) and the second insertion hole (42) is provided with a first protruding rib (53), the first protruding rib (53) being in abutment with the limiting hole (251) and/or the second insertion hole (42).

8. The relay according to claim 6, further comprising a second positioning pin (6), wherein the first positioning section (51) is provided with a dislocation notch (511), the longitudinal cross-sectional area of the second positioning section (52) is smaller than the inner hole area of the second insertion hole (42), and the second positioning pin (6) is inserted into the second insertion hole (42) and the limiting hole (251).

9. The relay according to claim 8, wherein the second positioning pin (6) comprises a third positioning section (61) and a fourth positioning section (62), the third positioning section (61) is connected with the fourth positioning section (62) in an L shape, the third positioning section (61) is inserted into the second insertion hole (42) and the dislocation notch (511), and the fourth positioning section (62) is inserted into the second insertion hole (42).

10. Relay according to claim 9, characterized in that at least one surface of the second positioning pin (6) placed in the dislocation gap (511) and the second receptacle (42) is provided with a second protruding rib (63), the second protruding rib (63) being in abutment with the dislocation gap (511) and/or the second receptacle (42).

11. The relay according to claim 5, characterized in that one end of the first assembling plate (21) is provided with a second inserting part (26), the other end of the first assembling plate (21) is provided with a supporting lug (27), the second inserting part (26) is clamped with a limit rib (43) on the base (4), and the supporting lug (27) is abutted with the yoke part (13).