JPH0525150Y2 - - Google Patents

Description

[Detailed Description of the Invention] <<Field of the Invention>> This invention relates to a reed relay that drives a reed switch with a coil.

<Summary of the invention> This invention does not form the shielding member for external magnetic lines of force as a separate member, but instead integrates the contact terminal part led out from the reed switch and the coil terminal part led out from the coil into one piece using a magnetic material. The reed relay is designed to provide a magnetic shield from external lines of magnetic force by enclosing the reed relay in addition to its original energizing action.

≪Prior art and its problems≫ A reed relay consists of a pair of lead pieces made of magnetic material that are placed opposite each other so that their tips are close to each other and are enclosed in a glass tube, which is an airtight container. They are brought into contact with and separated from each other.

For this reason, for lead pieces made of magnetic material,
When external magnetic lines of force act, the external magnetic lines of force create a disturbing magnetic field, which may cause the lead pieces to erroneously come into contact with and separate from each other.

In order to prevent such malfunctions, there is a method of surrounding the reed relay with a magnetic material and using the magnetic material to magnetically shield external magnetic lines of force.
This method is effective because the magnetic material provided around the reed relay passes the magnetic field lines of its own coil, so it has other effects such as increasing the operating sensitivity of the reed piece compared to the case without such a magnetic material. It is considered a shielding method. Therefore, even in the past,
A reed relay as shown in No. 57-179247 or Utility Model Publication No. 59-10676 was proposed.

However, the reed relays proposed in the above-mentioned Utility Model Application No. 57-179247 and Utility Model Application No. 59-10676, etc., only surround the reed switch with one or two pieces of magnetic material; The length is shorter than that of the reed relay, so
There was a problem in that the external magnetic lines of force could not be sufficiently magnetically shielded, and the external magnetic lines of force entered the reed switch through gaps where there was insufficient magnetic material.

≪Purpose of the invention≫ This invention was made in view of the problems mentioned above, and its purpose is to achieve a high shielding effect against external magnetic lines of force that cause malfunctions of reed switches, and to provide an inexpensive The purpose of the present invention is to provide a reed relay with a shield structure that is easy to assemble.

≪Configuration and Effects of the Invention≫ In order to achieve the above object, the present invention incorporates a reed switch in a coil bobbin, and a pair of contact terminals led out from the reed switch,
and a reed relay in which an external connection terminal is led out in one direction from one end side of a pair of coil terminal portions led out from the coil of the coil bobbin, wherein each of the terminal portions is formed of a magnetic material, and the coil bobbin is A flange portion is provided on the upper and lower sides, and the pair of contact terminal portions are fixed facing each other across the upper and lower flange portions at one corner portion of two opposing sides of the flange portion, and at the other side corner portion. It is characterized in that the pair of coil terminal portions are fixedly facing each other across the upper and lower flange portions.

That is, in the reed relay according to this invention, a pair of contact terminal parts led out from the reed switch and a pair of coil terminal parts led out from the coil of the coil bobbin are each formed integrally with a magnetic material, and the pair The contact terminal portions of the flange portion are fixed oppositely to each other at one corner portion of two opposite sides of the flange portion, straddling the upper and lower flange portions, and the pair of coil terminal portions are fixed to the other side corner portion. Since the four corners of the reed relay are magnetically shielded by being fixed facing each other across the upper and lower flange parts, the shielding effect can be enhanced compared to the conventional one, and malfunction of the reed switch due to external magnetic lines of force can be prevented.

In addition, in the present invention, the contact terminal part and the coil terminal part are integrally made of magnetic material, and are also configured to serve as external connection terminals, so the number of parts is small, and the upper and lower flange parts Since the reed relays are constructed so as to straddle and be fixed oppositely, the number of assembly steps is small, and therefore, this type of reed relay with excellent shielding effect can be provided at a low cost.

<<Description of Examples>> Examples of the present invention will be described below based on the drawings.

FIG. 1 is a perspective view of a reed relay according to the present invention, and in the figure, reference numeral 1 indicates a coil bobbin in which upper and lower flange portions 1b, 1b are provided on the upper and lower sides of a hollow cylindrical body 1a.

In this coil bobbin 1, a coil 2 is wound around the outer periphery of a hollow cylindrical body 1a, and a reed switch 9 is embedded within the hollow cylindrical body 1a, as shown in FIG. 4B. Although not shown in the drawings, this reed switch 9 has a pair of reed pieces made of magnetic material facing each other so that their tips are close to each other and enclosed in a glass tube 9b, which is an airtight container, as in the conventional case.

In addition, a lead terminal 9 led out from the lead piece
a, 9a protrude from the upper and lower flange portions 1b, 1b.

3... are cut grooves formed near the corners of two opposing sides of the flange portion 1b.

4, 4 is a terminal holding convex portion formed on the surface of the upper flange portion 1b, as shown in FIG.
At the diagonal corner, the upper flange 1
It is arranged slightly inside the edge of b and in front of the cut grooves 3, 3.

In addition, in the lower flange portion 1b, as shown in FIG. It protrudes slightly inward from the rim.

Between the upper and lower flange parts 1b, 1b, a pair of contact terminal parts 6, 7 and a pair of coil terminal parts 8, 8 are opposed to each other, straddling the upper and lower flange parts 1b, 1b from four directions. Fixed.

The pair of contact terminal portions 6 and 7 are both made of a magnetic material, and tapered external connection terminals 6a and 7a are formed at the lower part of one end thereof.

One contact terminal portion 6 is provided with a U-shaped piece 6b on the outer edge of the upper part of the external connection terminal 6a, and this U-shaped piece 6b extends along the terminal holding convex portion 5 of the lower flange portion 1b. The bent tip is welded and connected to a lead terminal 9a protruding from the lower flange portion 1b.

Furthermore, the upper portion 6c of this U-shaped piece 6b is
It is formed into a wide plate body, and claw-equipped notches 6d, 6d, which are fitted into the cut grooves 3, 3 of the upper and lower flange parts 1b, 1b, are formed at two locations on the upper and lower sides of the inner edge.

The other contact terminal section 7 does not have a U-shaped piece 6b on the top of the external connection terminal 7a like the above contact terminal section 6, but has a wide upper section 7c extending directly, and has a claw. The cutout portions 7d, 7d are formed at two locations on the upper and lower sides of the inner edge of the upper portion 7c, similarly to the connection terminal portion 6 described above.

A U-shaped piece 7b is provided on the outer edge of the upper part of the upper clawed notch 7d, and this U-shaped piece 7b forms the terminal holding protrusion 4 of the upper flange 1b.
along with the bent end of the lower flange 1.
It is welded and connected to a lead terminal 9a that protrudes from b.

The pair of coil terminal portions 8, 8 are each formed identically and made of a magnetic material, and tapered external connection terminals 8a, 8a are provided at the lower portion on one end side.

Further, the upper part 8b is formed wide, and upper and lower flange parts 1 are formed on the inner edge of the upper part 8b.
Notches 8c, 8c with claws that fit into the cut grooves 3, 3 of b, 1b are formed at two upper and lower locations.

Note that the upper end 8d of the coil terminal portion 8 is connected to the coil 2
It is formed slightly thin to make it easier to wrap around.

The present invention has the above-mentioned configuration, and the reed switch 9 is built in the hollow part of the cylindrical body 1a of the coil bobbin 1, and the coil 2 is preassembled with the coil 2 wound around the outer periphery of the reed switch 9.

At this time, the upper and lower lead terminals 9 of the reed switch 9
a and 9a protrude from approximately the center of the upper and lower flange portions 1b, 1b, and both end portions of the coil 2 are both drawn out onto the upper flange portion 1b.

Therefore, first, the contact terminal portion 6 having the U-shaped piece 6b is placed on the upper part of the external connection terminal 6a so that the U-shaped piece 6b contacts the lead terminal 9a protruding from the lower flange 1b, and If the upper and lower notches 3 with claws provided in the portion 6c are fitted into the cut grooves 3, 3 of the upper and lower flange parts 1b, 1b, both will be securely fixed.

Then, in the cut grooves 3, 3 on the opposite side to which the contact terminal portion 6 is attached, a U-shaped piece 7b is placed on the upper side.
Notches 7d, 7d with claws of the contact terminal portion 7 having
are fitted and fixed to the upper and lower flange parts 1b, 1b. At this time, the U-shaped piece 7b is connected to the lead terminal 9a protruding from the upper flange part 1b while being joined to the terminal holding convex part 4 protruding from the upper flange part 1b.

Next, a pair of coil terminal parts 8 are inserted into the upper and lower cut grooves 3, 3 provided near the corner parts on the opposite side of the corner parts of the upper and lower flange parts 1b, 1b to which the contact terminal parts 6, 7 are attached. , 8 facing each other, and the upper and lower notches 8c, 8c, respectively.
-Insert and fix 8c and 8c. Further, the coils 2, 2 drawn out onto the upper flange portion 1b are wound around the upper ends 8d, 8d of the coil terminal portions 8, 8.

As a result, each terminal portion 6, 7, 8, 8 is securely fixed to the upper and lower flange portions 1b, 1b of the coil bobbin 1, and the external connection terminals 6a, 7
a, 8a, 8a are led out in one direction below the lower flange portion 1b of the coil bobbin 1 to form a vertical type reed relay.

Further, the outer periphery of this reed relay is magnetically shielded by a pair of contact terminal portions 6 and 7 made of a magnetic material and a pair of coil terminal portions 8 and 8.

In this way, the contact terminal parts 6, 7 and the coil terminal parts 8, 8 are formed to have approximately the same length, and in order to prevent external magnetic lines of force from preferentially entering the contact terminal part,
A reed relay that is resistant to external magnetic fields.

As explained above, according to this embodiment, one end side of the contact terminal part and the coil terminal part is used as an external connection terminal and is made of a magnetic material, so that the contact terminal part and the coil terminal part have the original energizing function. At the same time, it also functions as a magnetic shield, and the number of parts can be reduced. Moreover, since the contact terminal part and the coil terminal part, which have a magnetic shielding effect, only need to be fixed facing each other across the upper and lower flanges of the coil bobbin, the vertical type has a shield structure that has a high magnetic shielding effect and is inexpensive and easy to assemble. Can provide reed relays.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a reed relay according to the present invention;
Figure 2 is a plan view of the reed relay according to the present invention, Figure 3 is a bottom view of the reed relay according to the present invention, and Figure 4 is a bottom view of the reed relay according to the present invention.
Figures a to c are a left side view, a front view, and a right side view of the reed relay according to the present invention. 1... Coil bobbin, 2... Coil, 3... Cut groove, 4, 5... Terminal holding protrusion, 6, 7...
Contact terminal section, 8, 8... Coil terminal section.

Claims (1)

[Scope of Claim for Utility Model Registration] A reed switch is built into the coil bobbin, and a pair of contact terminals led out from the reed switch, and a pair of coil terminal parts led out from the coil of the coil bobbin are connected externally to one end side. In a reed relay in which connection terminals are led out in one direction, each of the terminal parts is formed of a magnetic material, and flange parts are provided on the upper and lower sides of the coil bobbin, and one side of two opposing sides of the flange part is provided. The pair of contact terminal portions are fixed facing each other at the corner portion, straddling the upper and lower flange portions, and the pair of coil terminal portions are fixed facing each other at the other corner portion, straddling the upper and lower flange portions. A reed relay that is characterized by: