JP2669853B2 - relay - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to relays such as metal hermetic relays.

[Prior Art] Conventionally, a small-sized metal hermetic relay which has been used in a bad environment under high temperature and high humidity has a configuration as shown in FIG. 24 and FIG. That is, two iron cores 3 ′ are press-fitted and fixed in a central hole of a U-shaped magnetic yoke 1 ′,
A coil 4 is wound around the outer periphery of the iron core 3 ', and an alnico permanent magnet 5 is welded and fixed to the lower surface of the yoke 1'between the coils 4. The coil 4, the yoke 1 ', and the like form a coil block C. The mounting pieces 2 of the yoke 1'are welded and fixed to both ends of a magnetic base (hereinafter referred to as a hermetic base) 6. The hermetic base 6 is made of a plate material such as Fe, and the lead terminals 7, 8 and 9 are insulated from the plate material by glass sealing 10 as shown in FIG. Conductive, rod-shaped L-shaped contact rod
The base of 11 is welded and fixed to the upper portion of the terminal 8 protruding from the upper surface of the hermetic base 6, and the tip of the contact rod 11 is a normally open contact 11a. In addition, conductive L-shaped contact rod 1
The base 2 is welded and fixed to the upper part of the terminal 9 protruding from the upper surface of the hermetic base 6, and the tip is a normally closed contact 12a located above the normally open contact 11a and opposed thereto.

The tip of a conductive operating spring 13 'is located between the surface contacts 11a and 12a, and the base of the operating spring 13' is welded and fixed to the upper part of the terminal 7 as shown in FIG. Support pieces
It is fixed by welding to 14 and is supported by the operating spring 13 '. A contact block S is constituted by the contact rods 11 and 12, the operation spring 13 ′, etc., and the contact block S is formed by the hermetic base 6
Are arranged on both sides of the upper surface of the. The amateur 15 'is swingably provided on the lower surface of the permanent magnet 5, and the amateur 1'
The protrusion 16 on the upper surface of 5 'is a rotation support portion of the armature 15', and both ends of the armature 15 'face the end faces of the core 3' of the coil block C as the pole faces. A drive pin 17 for driving the operation spring 13 'to press downward is integrally provided at the tip of the armature 15' so as to project laterally.

[Problems to be Solved by the Invention] In the above-mentioned conventional example, since the permanent magnets 5 are arranged between the coils 4, there is a problem that the coil space becomes small and the sensitivity is poor. Further, as shown in FIG. 25, the yoke block is also composed of three parts, that is, the yoke 1'and the two iron cores 3 ', and the number of partial points and the number of assembling steps are increased. Furthermore, as shown in FIG. 26, the support piece 14 is welded to the terminal 7 ((a) in the figure), and the operating spring 13 ′ is further attached to the support piece 14.
However, there is a problem that welding is performed at two locations and two parts are required, resulting in high cost.

The present invention has been provided in view of the above points,
The purpose of the present invention is to provide a low-cost relay that has a large coil base, high efficiency, high sensitivity, and a small number of parts.

[Means for Solving the Problems] [Operation] In the invention of claim 1, each piece of a plate-shaped and cross-shaped yoke made of a magnetic material is bent at substantially right angles in the same direction. While forming two of them as an iron core,
A mounting piece attached to a base made of a magnetic material to form two other magnetic paths, a coil is wound around the iron core of the yoke to form a coil block, and contacts and contact points are provided on both sides of the base. The base is provided with a contact block made of an operation spring for opening / closing between the base and the base via an insulating material, and a permanent magnet is provided on the base between the contact blocks, and the contact block is provided between the coil block and the permanent magnet. An armature that swings freely and drives the operation spring is provided, and the operation spring is formed in a substantially L shape, and one piece is fixed to a terminal that is erected on the base via the insulating material, and the other. By arranging a piece at the above both contacts, the coil is wound around two pieces of iron core of a cross-shaped yoke, and a permanent magnet is provided in an empty space of both contact blocks on the base, and the permanent magnet and the coil are provided. With blocks Place swingably amateur between, also by fixing a piece to form the operation spring L type terminal, is obtained by placing another piece between the contacts.

According to a second aspect, in the first aspect of the invention, a bypass member that bypasses a magnetic path of the permanent magnet when the coil is excited is provided in parallel with the permanent magnet.
The width of the attraction force is set when the coil is excited.

According to a third aspect of the present invention, in the first aspect of the present invention, a supporting portion for supporting the armature is formed by a spring portion for adjusting a suction force, thereby reducing component transfer.

According to the invention of claim 4, a coil is wound around a magnetic iron core to form a coil block, and a permanent magnet and a contact block via an insulating material are formed on a magnetic base to form a magnetic path. Arrange, form a case made of a magnetic material that covers the upper surface of the base, fix the iron core of the coil block to the lower surface of the ceiling of the case, and place the contact block between the permanent magnet and the coil block. By arranging an armature that is driven to open and close so as to be swingable, the iron core is directly fixed to the lower surface of the case ceiling, and a large coil space is provided.

According to the fifth aspect of the present invention, each piece of the plate-shaped and cross-shaped yoke made of a magnetic material is bent at substantially right angles in the same direction, and two of them are formed as iron cores, and the other two are formed.
As a mounting piece to be attached to a magnetic base to form a magnetic path, a coil is wound around the yoke iron core to form a coil block, and contacts are formed on both sides of the base and the contacts are opened and closed. A contact block composed of an operating spring is provided as an insulating material from the base, and a permanent magnet is disposed on the base. The contact block is disposed on the upper surface of the permanent magnet and swingably pivots to drive the operating spring. By providing an amateur to hold the amateur slidably, by forming a spring member supported by the iron core of the yoke, by holding the amateur by the spring member supported by the iron core of the yoke, The amateur is also not held on the permanent magnet side.

In the invention of claim 6, in the invention of claim 5,
Both ends of the spring member are attached to the mounting piece of the yoke, and the surface of the permanent magnet can be flat, so that processing and assembly can be facilitated.

Example 1 An example of the present invention will be described below with reference to the drawings. 1 to 3, a yoke 1 is formed in a flat plate shape in a cross shape, and each piece is bent in the same direction by about 90 °, and a pair of shorter ones facing each other is an iron core 3. As shown in FIG. 1, coil bobbins 21 each having a coil 4 wound around the iron core 3 are inserted into the iron core 3 to form a coil block. The other two longer pieces of the yoke 1 are used as the mounting pieces 2,
The lower ends of the mounting pieces 2 are fitted into the recesses 18 on both sides of the hermetic base 6 having the same construction as the conventional one, and are fixed by welding. As described in the conventional example, the hermetic base 6 is integrally formed by insulating the outer periphery of the plurality of terminals 7 ... With a glass seal 10. Similar contact blocks S of the related art are arranged on both sides of the upper surface of the hermetic base 6. The contact rods 11 and 12 have the same structure as the conventional one, but the operating spring 13 has a different structure as will be described later. Furthermore,
A permanent magnet 5 of Alnico, Fe—Ni—Co system or the like is welded and fixed to the upper surface of the hermetic base 6 in the empty space between the contact blocks S.

The amateur 15 has a drive pin 17, a fulcrum 19, and a torsion spring 20.
Etc. are formed by simultaneous molding, and a torsion spring 20 having a T-shaped tip projecting laterally from both side surfaces of the armature 15. The tip end portion 20a of the torsion spring 20 is attached to the mounting piece 2 of the yoke T. Welded in the window side 2a. Further, a fulcrum portion 19 which is fitted in the groove 5a of the permanent magnet 5 and supports the rotation of the amateur 15 is formed on the lower surface of the amateur 15 in a substantially semicircular cross section. The hermetic base 6 is provided with a pair of coil terminals 22. Here, main gaps g are formed between the end surface of the armature 15 of the yoke 1 of the coil block C, which is the magnetic pole surface, and the end portion of the armature 15. It swings and drives the operating spring 13 by the drive pin 17 to switch between the normally open contact 11a and the normally closed contact 11b. Also, the torsion spring 20
It is provided in order to prevent the armature 15 from being displaced to the front, rear, left and right (vibration resistance, impact resistance). The hermetic base 6 is actively used as a magnetic path, and the case 23 that covers the upper surface of the hermetic base 6 is formed in a box shape with an open lower surface.

FIG. 4 shows a part of the operation spring 13, which is bent substantially in an L-shape. One piece 13a is fixed to the terminal 7 by welding ((c) in the figure), and the other end 13b of the tip is shown. Is located between the contacts 11a, 12a as shown in FIG. 1 (b). By constructing the operating spring 13 in this way, only one part is required, and welding can be done in one place, and the cost can be reduced. Further, as shown in FIG. 5, the bending stress with respect to the load F can be reduced by twisting the piece 13a of the operating spring 13.

FIG. 7 shows an equivalent magnetic circuit of this embodiment, and FIG. 6 shows a conventional equivalent magnetic circuit. In FIG. 6, the coil 4 is connected to the series circuit of the permanent magnet 5 and the internal resistance R ₁ of the permanent magnet 5.
The series circuit of the magnetomotive force and the main air gap g is connected in parallel. However, in this embodiment of FIG. 7, the permanent magnet 5 and the internal resistance R ₁ is in the form of being connected in series to the parallel circuit of the magnetomotive force and the main air gap g.

As described above, in the present embodiment, by eliminating the separate iron core and using the piece of the yoke 1 as the iron core 3, only one component of the yoke 1 is used, and the permanent magnet is used in the empty space between the two contact blocks S. By arranging 5, it is possible to secure a large coil space, and it is possible to achieve high sensitivity. Furthermore, by using the operating spring 13 as one component,
The cost can also be reduced.

Example 2 By the way, in the equivalent magnetic circuit shown in FIG. 7, since the permanent magnets 5 are arranged in series in the electromagnet structure such as the coil 4, when the internal resistance R ₁ of the permanent magnets 5 is large, As shown in the figure, the width between the attractive force when the coil 4 is excited and the attractive force when the coil 4 is not excited cannot be increased ((c) in the figure), the efficiency becomes poor, the sensitivity becomes higher, and the sensitivity becomes lower. It hinders power consumption.

Therefore, in this embodiment, a bypass member that bypasses the magnetic path of the permanent magnet 5 when the coil 4 is excited is provided in parallel with the permanent magnet 5.

That is, as shown in FIGS. 9 and 10, a U-shaped bypass member 24 made of a magnetic material is provided between the coil block C and the armature 15.
24 also serves as support for amateur 15. A concave portion 15a is provided on the upper surface of the armature 15, and a protruding portion 24a fitted in the concave portion 5a is formed on the lower surface of the bypass member 24. Then, the both side pieces of the bypass member 24 are connected to the bypass pieces 24b.
And cover the permanent magnet 5 with the bypass member 24,
The lower end surface of 24b is in contact with the upper surface of the hermetic base 6. Therefore, the equivalent magnetic circuit in this case is as shown in FIG. 11, and the attraction force characteristic is as shown in FIG. The bypass piece 24b is connected to the permanent magnet 5 in parallel, and the magnetic flux generated when the coil 4 is excited is the bias piece 24b.
Since it passes b, the magnetic flux efficiency increases, and as shown in FIG. 12, the width of the attractive force when the coil 4 is excited is large ((d) in the figure), and a highly sensitive and low power consumption electromagnet is used. Can be configured. Moreover, since the amateur 15 is also supported by the bypass member 24, the bypass member 24 can be configured without increasing the number of parts.

[Embodiment 3] FIGS. 13 and 14 show Embodiment 3 in which the iron core 3 has a flat plate shape (a round bar shape may be used), the coil 4 is wound around the iron core 3, and the upper end surface of the iron core 3 is Case 23 made of magnetic material
It is designed to be welded and fixed to the ceiling surface of. Also,
In the case of this embodiment, the torsion spring 20 is not formed in the armature 15 because of the shape of the iron core 3. The case 23 and the hermetic base 6 are effectively used as a magnetic path. In this embodiment, the thickness of the yoke 1 is smaller than that of the first embodiment, and the iron core 3 is directly welded to the case 23 to be used as a magnetic path. A metal hermetic relay can be provided.

[Embodiment 4] FIGS. 15 to 18 show an embodiment in which a support for the armature 15 and a spring for matching the attraction force of the electromagnet are formed of the same component. In this embodiment, the armature 15 is formed in substantially the same shape as that shown in FIG. 9, and the recessed portion 15a of the armature 15 is fitted to the center portion of the support member 25 for supporting the armature 15 so as to project downward. It has a convex portion 26, and spring portions 27 are integrally formed on both sides of the armature 15 in the longitudinal direction. The spring portion 27 of the support member 25 matches the attractive force of the electromagnet, and the spring load characteristic shown in FIG. 18 can be adjusted. With such a configuration, a single component, that is, the support member 25 can serve both as the support of the armature 15 and the spring load, so that the number of components can be reduced, and the cost and size can be reduced.

[Fifth Embodiment] Meanwhile, a concave groove 5a for supporting the armature 15 is provided on the upper surface of the permanent magnet 5 used in the first embodiment. Therefore, it is necessary to machine the concave groove 5a in the permanent magnet 5, it is difficult to secure the dimensional accuracy, and the material of the usable permanent magnet 5 is limited.

Therefore, in this embodiment, processing of the permanent magnet is facilitated,
The vibration resistance is excellent and the assembling property is improved.

The permanent magnet 5 is formed flat as shown in FIG. 19, and the armature 15 is formed thinner toward both ends as shown in FIGS. 19 and 21, and a ridge is formed in the center of the lower surface of the armature 15. A fulcrum portion 19 is formed, and a concave portion 15a is formed on the upper surface. Further, as shown in FIG. 20, a spring portion 27 having a triangular cross-section is formed in the center of the elastic flat pressing spring 26 by notching the periphery in a U-shape and projecting downward. Has a lower end portion of the iron core 3 of the yoke 1 and a hole 28 for positioning the iron core 3 is bored. The pressing spring 26 is fixed to the iron core 3, and the recessed portion 15a of the armature 15 is fitted by the spring portion 27 of the pressing spring 26 to press down the armature 15 to position the armature 15 on the upper surface of the permanent magnet 5. Therefore, it is possible to support the armature 15 on the permanent magnet 5 and to make a rotational movement without special processing of the permanent magnet 5.

[Sixth Embodiment] FIGS. 22 and 23 show a sixth embodiment. In this embodiment, the permanent magnet 5 is formed flat, and the fulcrum portion 19 is formed on the lower surface of the armature 15. The supporting hinge spring 29 is formed flat. Metal hinge spring 29
Two holes 30 for caulking the embossing pins projecting from the upper surface of the amateur 15 are drilled in the center of the
Reference numeral 31 is adapted to be joined in the window portion 2a of the mounting piece 2 of the yoke 1. When the hinge spring 29 is made of synthetic resin, a pin or the like may be provided on the window 2a so as to be fixed thereto. With such a configuration, the armature 15 can be supported on the permanent magnet 5 by the hinge spring 29 to rotate without moving the permanent magnet 5 specially. It is not necessary to process the shape, and the assemblability is improved,
Further, when the synthetic resin is used as the material of the hinge spring 29 as described above, it is advantageous in corrosion resistance and the like.

[Effects of the Invention] The invention according to claim 1 is that, as described above, each piece of the plate-shaped and cross-shaped yoke made of a magnetic material is bent at substantially right angles in the same direction, and two of them are iron cores. And the other two are attached to a base made of a magnetic material to form a magnetic path, and a coil is wound around an iron core of the yoke to form a coil block. Contact blocks composed of contacts and operating springs for opening and closing the contacts are provided on both sides via an insulating material from the base, and a permanent magnet is provided on the base between the contact blocks to form a coil block. An armature that swingably rotates to drive the operation spring is provided between the permanent magnet and the operation spring. The operation spring is formed in a substantially L shape, and one piece is erected on the base via the insulating material. It is fixed to the terminal and the other piece is Since the coil is placed between both contacts, the coil is wound around two pieces that are iron cores of a cross-shaped yoke, and the permanent magnet is provided in the empty space of both contact blocks on the base to increase the coil space. Therefore, the sensitivity can be increased, and the yoke can be configured as one part by eliminating the conventional iron core of another member and forming the iron core and the mounting piece with the yoke. , The number of parts,
It is possible to provide a relay with a small number of assembling steps, and furthermore, since the operation spring is formed in an L shape and one piece is fixed to the terminal, a separate member is used to support the operation spring as in the related art. There is no need, and it is possible to reduce the cost by integrating the operating spring into one component.

The invention of claim 2 is the invention according to claim 1,
By providing a bypass member, which bypasses the magnetic path of the permanent magnet when the coil is excited, in parallel with the permanent magnet, it is possible to secure a width of the attractive force when the coil is excited. It is possible to provide a relay of power consumption.

According to a third aspect of the present invention, in the first aspect of the present invention, since the supporting portion for supporting the armature is formed by a spring portion for adjusting a suction force, the transfer of parts can be reduced, and therefore, the cost can be reduced. Therefore, it is possible to provide a relay that can be miniaturized.

According to a fourth aspect of the present invention, a coil is wound around a magnetic core, a coil block is formed, and a permanent magnet and a contact block via an insulating material are formed on a magnetic base to form a magnetic path. Arrange, form a case made of a magnetic material that covers the upper surface of the base, fix the iron core of the coil block to the lower surface of the ceiling of the case, and place the contact block between the permanent magnet and the coil block. By arranging the armature that opens and closes so as to be swingable, the iron core is directly fixed to the lower surface of the ceiling of the case, so that the coil space can be increased and the sensitivity of the relay can be increased.

According to a fifth aspect of the present invention, each piece of the yoke which is made of a magnetic material and is formed in a flat cross shape is bent at substantially right angles in the same direction,
Two of them are formed as iron cores, and the other two are mounting pieces attached to a magnetic base to form a magnetic path, and a coil is wound around the core of the yoke to form a coil block. Then, contact blocks composed of contacts and operating springs for opening and closing the contacts are provided on both sides of the base through an insulating material from the base, and permanent magnets are arranged on the base. By providing an armature disposed on the upper surface and swingably rotating to drive the operation spring, the armature is swingably held, and a spring member supported by the iron core of the yoke is formed, thereby By holding the armature by the spring member supported by the iron core, the armature is not held on the permanent magnet side, so that the permanent magnet can be attached to the surface of the permanent magnet without any special processing. Be a surface, therefore,
This has the effect of being easy to process and easy to assemble.

Further, also in the sixth aspect, the surface of the permanent magnet can be made flat in the same manner, and the processing and the assembly can be facilitated.

[Brief description of the drawings]

1 (a) and 1 (b) are a plan view and a sectional view of a main part of a relay according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the same, FIG. 3 is a perspective view of a yoke of the same, and FIG. The figure is a perspective view of the main part of the above.
5 is an operation explanatory view of the above, FIG. 6 is an equivalent magnetic circuit diagram of a conventional case, FIG. 7 is an equivalent magnetic circuit diagram of an embodiment of the present invention, and FIG. FIG. 9 is an exploded perspective view of a main part of the second embodiment, FIG. 10 is a cross-sectional view of the main part of the same, FIG. 11 is an equivalent magnetic circuit diagram of the same, and FIG. FIG. 13 is a cross-sectional view of the third embodiment,
14 is an exploded perspective view of the same, FIG. 15 is a perspective view of the fourth embodiment of the same, FIG. 16 is an exploded perspective view of the same, FIG. 17 is a sectional view of a main part of the same, and FIG. FIG. 19 is a diagram showing suction force characteristics, FIG. 19 is a cross-sectional view of Example 5 of the above, FIGS. 20 (a) and (b) are a plan view and a cross-sectional view of the same pressing spring, and FIG. 21 (a) is a plan view of an amateur.
21 (c) is a bottom view of the above embodiment, and FIGS. 22 (a) and 22 (b) are a plan view and a cross-sectional view of the same embodiment with the case of the sixth embodiment removed, and FIG. FIG. 24 is a plan view of the same hinge spring, FIG. 24 is a cross-sectional view of a conventional example, FIG. 25 is a perspective view of the same yoke, and FIG. 26 is a perspective view of a main part of the same. 1 is a yoke, 2 is a mounting piece, 3 is an iron core, 4 is a coil, 5 is a permanent magnet, 6 is a hermetic base, 7 is a terminal, 13 is an operating spring, 15 is an amateur, 23 is a case, 24 is a bypass member, 25 Is a support member, 26 is a pressing spring, and 29 is a hinge spring.

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshinobu Okada 1048 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works, Ltd. (56) References JP 61-78029 (JP, A) 98748 (JP, U) JP-A 57-132353 (JP, U) JP-A 1-48540 (JP, U) JP-A 58-27468 (JP, Y2)

Claims (6)

(57) [Claims] 1. A flat plate-shaped and cross-shaped yoke piece made of a magnetic material is bent at substantially right angles in the same direction, two of them are formed as iron cores, and the other two are magnetized. An operation of forming a coil block by winding a coil around the iron core of the yoke to form a coil block as a mounting piece that is attached to a magnetic base to form a path, and opening and closing contacts on both sides of the base and between the contacts. A contact block composed of a spring is provided via an insulating material from the base, and a permanent magnet is provided on the base between the contact blocks so that the contact block can swing freely between the coil block and the permanent magnet. An armature that rotates to drive the operation spring is provided, and the operation spring is formed in a substantially L shape, one piece is fixed to a terminal erected on the base through the insulating material, and the other piece is connected to the both contacts. Characterized by being placed between Over. 2. The relay according to claim 1, wherein a bypass member that bypasses a magnetic path of the permanent magnet when exciting the coil is provided in parallel with the permanent magnet. 3. The relay according to claim 1, wherein the support portion for supporting the armature is formed by a spring portion for matching suction force. 4. A coil block is formed by winding a coil around an iron core made of a magnetic material, and a permanent magnet and a contact block via an insulating material are arranged on a base made of a magnetic material to form a magnetic path. Forming a case made of a magnetic material covering the upper surface of the base, fixing the iron core of the coil block to the lower surface of the ceiling of the case, and driving the contact block to open and close between the permanent magnet and the coil block. A relay that is characterized by arranging swinging amateurs. 5. A plate-shaped, cross-shaped yoke made of a magnetic material is bent at substantially right angles in the same direction, two of which are formed as iron cores, and the other two are magnetic. An operation of forming a coil block by winding a coil around the iron core of the yoke to form a coil block as a mounting piece that is attached to a magnetic base to form a path, and opening and closing contacts on both sides of the base and between the contacts. A contact block made of a spring is provided via an insulating material from the base, and a permanent magnet is arranged on the base. The permanent magnet is disposed on the upper surface of the permanent magnet and is swingably rotated to drive the operating spring. A relay characterized in that an armature is provided, the armature is swingably held, and a spring member supported by the iron core of the yoke is formed. 6. A relay according to claim 5, wherein both ends of the spring member are attached to the mounting pieces of the yoke.