JPS6238292Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a general-purpose relay mainly used for control purposes.

<Prior art> As a conventional general-purpose relay of this type, the one shown in Fig. 1 is generally used, and this relay has a fixed armature surface 2 on the upper end surface of an iron core 1 of a solenoid-type excitation coil. , the movable armature surface 3 facing this
A movable iron piece 4 having a structure is fixed to a movable contact piece 6 having a relay contact 7 at its tip and communicated with the lower end of the iron core 1 via an L-shaped yoke 5.

<Problems to be Solved by the Invention> However, the relay configured as described above has a limit in reducing power consumption when obtaining a predetermined ampere turn, that is, when obtaining a predetermined suction force. That is, under the condition that the cross-sectional areas of the winding portions in the solenoidal excitation coil are equal, the smaller the average radius of the coil, the smaller the winding resistance, the larger the coil constant, the larger the ampere turn, and the larger the attractive force. Furthermore, the longer the length of the coil in the axial direction, the lower the power consumption. However, in the relay shown in Fig. 1, the upper end surface of the iron core 1 of the coil is used as the fixed armature surface 2, so it is geometrically advantageous to increase the area of this armature surface 2 to reduce the magnetic resistance. It is difficult to Furthermore, if the average radius of the coil is made smaller, the ampere turns become smaller and the suction force becomes smaller, making it impossible to obtain the suction force necessary for driving, so there is a limit to how small the average radius of the coil can be made. On the other hand, if the length of the coil in the width direction is increased, the height of the entire relay increases, making it larger.

<Purpose of the invention> The present invention was devised in view of these conventional problems, and aims to provide a high-sensitivity relay that can obtain a large attraction force with low power consumption while achieving miniaturization. This is the purpose.

<Means for Solving the Problems> In order to achieve the above-mentioned object, the relay of the present invention connects the iron core of the solenoid type excitation coil to the core shaft portion inserted through the excitation coil and the core shaft portion of the core shaft portion. A joint part extending from one end along the excitation coil in the orthogonal direction, and a fixed iron piece part extending from the tip of the joint part almost parallel to the core shaft part and having one side as a fixed armature surface. and are integrally formed in a U-shape, and the fixed iron piece part is made thinner than the core shaft part and the joint part, and the length and width of the fixed armature surface are respectively made as described above. A yoke is formed to have at least the same axial length and width as the excitation coil, and a yoke that constitutes a magnetic circuit together with the iron core is fixed to the other end of the core shaft, and is opposite to the fixed iron piece. It is characterized by a structure in which a movable iron piece having a movable armature surface facing the fixed armature surface is fixed to the movable armature.

<Embodiments> Hereinafter, preferred embodiments of the present invention will be described in detail based on the drawings.

In the relay shown in FIGS. 2 to 4 showing one embodiment, the axis of the solenoid-type excitation coil 11 is at the mounting surface A.
It has a horizontal shape that is parallel to the The iron core 9 of the excitation coil 11 has a core shaft portion 12 of the main body inserted through the excitation coil 11, and one end 1 of this core shaft portion 12.
2A is bent in an orthogonal direction along the excitation coil 11 to extend from the core shaft part 12, and the tip of this joint part 10 is bent in an almost orthogonal direction to the core shaft part 12. The fixed iron piece part 14, which is extended so as to be positioned substantially in parallel, is integrally formed in a U-shape.

The upper surface of the fixed iron piece 14 constitutes the fixed armature surface 13, and the fixed iron piece 14 has a core shaft portion having a tapered shape that gradually becomes thinner toward the tip 14A as shown in FIG. 12 and the joint part 10, and as is clear from FIG. 2 and FIG. The length L' and the inner width B' of the coil 11 are approximately the same.

The other end 1 of the core shaft portion 12 in the U-shaped iron core 9
By fixing the lower end of the yoke 15 to 2B,
An iron core 9 is fixed to an excitation coil 11. A movable contact piece 18 is fixed to this yoke 15, and one end of the movable contact piece 18 is led out to the outside as an external terminal 19, and a fixed contact 21, External terminals 23 and 24 are led out from 22.

A movable iron piece 16 is fixed to the movable contact piece 18 with one movable armature surface 17 facing the fixed armature surface 13, and the other end 12B of the core shaft portion 12 of the iron core 9 The fixed armature surface 13 via the yoke 15
The movable iron piece 16 is magnetically connected to the movable iron piece 16, and a magnetic circuit is closed by joining both the armature surfaces 13 and 17. Further, the length L and width B of the movable armature surface 17 are formed to be approximately the same as the axial length L' and the inner width B' of the excitation coil 11, similarly to the fixed armature surface 13. There is. Therefore,
Both the contact surfaces 13 and 17 have a contact area of (L×B).

Next, the operation of the above embodiment will be explained. By making both armature surfaces 13 and 17 horizontally located almost parallel to the axis of exciting coil 11, both armature surfaces 1
3, 17 length L and its width B, excitation coil 1
The length L' in the axial direction and the inner width B' thereof can be increased to be equal to or comparable to the length L' in the axial direction and the inner width B'. Here, if the cross-sectional area of the winding portion of the solenoid-type excitation coil 11 is equal, for example, L'×h in FIG. 2, the axial length L' of the excitation coil 11 is increased and the winding width h is decreased. can do. If this length L' in the axial direction is increased, both the armature surfaces 13 and 17 will correspond to it.
The contact area can be set large, and the increase in the contact area reduces the magnetic resistance. Furthermore, as the winding width h becomes smaller, the average radius r of the excitation coil 11 becomes smaller, the winding resistance becomes smaller, the coil constant Ge improves, and the ampere turn becomes larger. Furthermore, since the fixed iron piece 14 having the fixed armature surface 13 has a tapered shape, leakage magnetic flux is significantly reduced. By reducing the magnetic resistance, improving the coil constant Ge, and reducing leakage magnetic flux as described above, a large attractive force can be obtained with low power consumption, resulting in extremely high sensitivity. In addition, the thickness of the fixed iron piece 14 having a horizontal shape and the fixed armature surface 13 in the iron core 9 is made thin, and the iron core 9 formed by bending one piece into a U-shape is attached to the other end with a yoke 15. By fixing the excitation coil 11
Since it is fixed to the top, the height can be lowered and it can be made smaller.

FIG. 5 shows another embodiment of the present invention, which differs from the previous embodiment in that the movable iron core portion 1 of the iron core 9
4' has a stepped portion 25 formed at its base end to reduce its thickness, and substantially the same effect as the previous embodiment can be obtained.

<Effects of the invention> As detailed above, according to the relay of the invention,
The iron core of the excitation coil is connected to a core shaft portion inserted into the excitation coil, a fixed iron piece portion located parallel to this core shaft portion and having a fixed armature surface, and a joint portion that connects the core shaft portion and the fixed iron piece portion. In addition to having a U-shape with an integral part, the thickness of the fixed iron piece is made thinner, so the area of the armature surface can be increased to reduce magnetic resistance, and the axial length of the excitation coil can be reduced. It is possible to improve the coil constant by increasing the length of the iron core and reducing its average radius, reducing the winding resistance, and by making the fixed iron part integral with the iron core and reducing its thickness, leakage magnetic flux can be reduced. It can be reduced. Therefore, it is possible to obtain a highly sensitive relay that has a large attraction force with low power consumption.

Furthermore, since the armature surface was set parallel to the axis of the excitation coil, it was possible to create a horizontally elongated shape, the fixed iron piece was made thinner, and the integrated iron core was fixed to the excitation coil with a yoke. Therefore, there is an advantage that the overall height of the relay can be reduced and the size can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a cutaway front view of a conventional relay, FIGS. 2 to 4 show an embodiment of the relay of the present invention, FIG. 2 is a cutaway front view, FIG. 3 is a partial plan view, and FIG. 4
The figure is a sectional view taken along the line -- in FIG. 1, and FIG. 5 is a cutaway front view of another embodiment of the present invention. 9... Iron core, 10... Joint part, 11... Excitation coil, 12... Core shaft part, 12A... One end of the core shaft part, 12B... Other end of the core shaft part, 13... Fixed connection Pole surface, 14, 14'... Fixed iron piece part, 15... Yoke, 16... Movable iron piece, 17... Movable armature surface, 1
8...Movable contact piece.

Claims (1)

[Scope of utility model registration request] The iron core of a solenoid-type excitation coil is made up of a core shaft portion inserted into the excitation coil, a joint portion extending from one end of the core shaft portion along the excitation coil in a perpendicular direction, and this joint portion. A fixed iron piece extending substantially parallel to the core shaft from the tip thereof and having one side as a fixed armature surface is integrally formed in a U-shape, and the fixed iron piece is connected to the core shaft. and the thickness is thinner than that of the joint portion, and the length and width of the fixed armature surface are at least the same as the axial length and width of the excitation coil, respectively, and the core shaft portion is made thinner than the joint portion. A yoke constituting a magnetic circuit together with the iron core is fixed to the other end, and a movable armature having a movable armature surface facing the fixed armature surface is fixed to the movable armature disposed opposite to the fixed armature section. A relay that is characterized by: