JPH0739155Y2 - Temperature-sensitive reed switch device - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial field of application) The present invention accommodates a temperature-sensitive reed switch body in a positionable manner, and connects the lead wire of the temperature-sensitive reed switch body and a conductive terminal. The present invention relates to a temperature-sensitive reed switch device that facilitates connection.

(Prior Art) A conventional temperature-sensitive reed switch device, for example, when used for detecting a temperature change of an electric pot, as shown in FIG. 10, has relay lead wires 51a, 51b of a temperature-sensitive reed switch body 50 as shown in FIG.
Had to bend in the same direction. For this purpose, in order to protect the glass tube 53 equipped with the contact portion 52 provided in the temperature-sensitive reed switch body 50, the auxiliary member 54
I was wearing a and 54b and bending it. However, this structure has a drawback that the temperature-sensitive reed switch device 55 becomes long, making it difficult to mount it in a narrow place, and also increasing the heat capacity of the temperature-sensitive reed switch device, which lowers the thermal response.

In the figure, 53a is a temperature-sensitive magnetic material and 53b is a permanent magnet.

For this reason, as shown in FIG.
56 have been devised. This temperature-sensitive reed switch device 56 cuts the relay lead wires 51a, 51b of the temperature-sensitive reed switch body 50 into a predetermined length, bends it according to the mounting position, and welds the conductive terminals 57a, 57b, Next, the conductive terminal 5
The temperature-sensitive reed switch main body 50 to which 7a and 57b were attached was set in a mold and resin-molded as shown in FIG.

(Problems to be Solved by the Invention) In the above-mentioned resin-molded temperature-sensitive reed switch device, the manufacturing process includes (1) cutting and bending of lead wires, (2) terminal jig set, (3) ) Set of temperature sensitive reed switch body jig, (4) Spot welding,
(5) Jig removal, (6) Mold set, (7) Resin mold (about 90 seconds or more), (8) Mold removal, etc., as well as the terminal and the lead wire of the temperature-sensitive reed switch body. A positioning jig is required for the connection, and it is necessary to position the mold in the mold with high accuracy during molding. Moreover, since this mold has a glass tube sealed, it has a number of drawbacks such as high cost because low-pressure molding is performed at a low temperature.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a temperature-sensitive reed switch device that can be easily assembled without the need for positioning by reducing the manufacturing process. is there.

[Means for Solving the Problems] (Means for Solving the Problems) In order to achieve the above object, a temperature-sensitive reed switch device of the present invention comprises a temperature-sensitive magnetic body whose magnetic characteristics change in response to a change in ambient temperature. A magnet that holds a temperature-sensitive magnetic material,
A temperature-sensitive reed switch body having at least a contact portion that opens and closes according to a change in the magnetic characteristics of the temperature-sensitive magnetic body, and the temperature-sensitive reed switch body is housed in the reed portion of the housed temperature-sensitive reed switch body. It is characterized by comprising a conductive terminal to be connected, and a case provided with an insertion hole through which the conductive terminal and the lead portion can be welded from the outside.

(Operation) In the temperature-sensitive reed switch device of the present invention configured as described above, only the case is resin-molded in a separate step in advance, and the conductive terminal and the temperature-sensitive reed switch body are attached and housed in this case. Since the conductive terminal and the lead part of the temperature-sensitive reed switch body are welded by spot welding or the like, the conventional manufacturing process is reduced, and highly accurate alignment is possible without using a positioning jig or the like. The temperature-sensitive reed switch body can be easily assembled without damage to the glass tube.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

FIG. 1 is a perspective view of a temperature-sensitive reed switch device, and 1 is a temperature-sensitive reed switch device. The temperature-sensitive reed switch device 1 is composed of a case body 2, a case lid portion 3, a terminal 4, a mounting bracket 5, and a temperature-sensitive reed switch body (not shown) housed in the case body 2.

As shown in FIG. 2, the case main body is provided with an accommodation recess 7 for accommodating the temperature-sensitive reed switch body 6 (virtual line) on the central upper surface side, and the temperature-sensitive reed switch main body is provided on the left and right sides of the accommodation recess 7. A housing groove portion 8 for housing the glass tube sealing portion 6 is provided, and a lead groove portion 9 for inserting the lead portion of the temperature-sensitive reed switch body 6 is further provided outside thereof. Therefore, the temperature-sensitive reed switch main body 6 including its reed portion is completely accommodated in the accommodation recess 7, the accommodation groove portion 8, and the lead groove portion 9.

A step portion 11 for accommodating a conductive terminal, which will be described later, is formed on the outer side of the lead groove portion 9 so as to overlap the lead portion arranged on the bottom surface 10.
The step 12 provided on the upper part of the step 11 is adapted to engage with a fitting portion of the case lid 3 which will be described later, and accommodates and fixes the contact piece of the conductive terminal. An elongated hole 13 and an insertion hole 14 as shown in FIG. 2B are provided on the lower surface side of the case body 2. The long hole 13 is a through hole for protruding a part of the conductive terminal, and penetrates to the step portion 11 shown in FIG. 2 (a). Also, the insertion hole 14
Is a through hole for inserting an electrode such as spot welding,
It penetrates to the bottom surface 10 shown in FIG. 2 (a).

As shown in FIG. 3, the case lid portion 3 has a flat portion 15 on the lower surface side of the center for pressing the temperature-sensitive reed switch body into pressure contact with the mounting bracket 5, and on the left and right sides of the flat portion 15.
A fitting portion 16 that fits inside 12 is formed. This mating part
At the center side of 16 is a housing convex portion fitted in the housing groove portion 8.
There is 17, and the housing convex portion 17 positions the glass sealing portion of the temperature-sensitive reed switch body. Since the case lid portion 3 is formed so that the fitting portion 16 and the housing convex portion 17 are fitted to the case body 2, the case lid portion 3 is attached to the case body 2. The case is configured so that it does not come off easily.

FIG. 4 is a front view of (a) and a side view of (b) of the conductive terminal, which is made of conductive metal such as brass. A protrusion 18 to be inserted is provided, and a contact piece 19 bent in an inverted L shape at the upper end.
Is provided. The contact piece 19 is a portion that is locked to the step portion 11 inside the case body 2, and the back side surface 19a is brought into contact with the lead portion of the temperature-sensitive reed switch body.

FIG. 5 is a mounting bracket, (a) is a plan view and (b) is a side view. The mounting bracket 5 is composed of a substantially plate-shaped mounting portion 20 having a mounting hole 21 formed in a portion projecting outward of the case body 2, and a curved portion 22 extending with a step portion. . Then, by inserting the curved portion 22 side into the accommodation recess 7 of the case body 2, the R portion is rotated so as to wrap the temperature-sensitive reed switch body, and the mounting portion 20 is projected to the outside of the case body 2. ing.

In the temperature-sensitive reed switch device 1 having such a configuration, the reed portion of the temperature-sensitive reed switch body 6 is bent in the same direction with a predetermined width (or remains straight), and is inserted into the accommodation recess 7 of the case body 2. When accommodated, the lead portion is attached to the case body 2
It is arranged on the insertion hole 14 of. Next, the conductive terminal 4
Align the contact piece 19 of the
By passing through the inside of the long hole 13 of the case body 2, the back surface side 19a of the contact piece 19 comes into contact with the lead portion.
In this state, one electrode of the spot welding is put in the insertion hole 14 of the case body 2, and the other electrode is put on the contact piece 19 to perform welding. Next, the tip of the curved portion 22 of the mounting bracket 5 is inserted into the gap between the housing recess 7 and the temperature-sensitive reed switch body 6, and the mounting portion 20 of the mounting bracket 5 is set outside the case body 2.
The temperature-sensitive reed switch device 1 shown in FIG. 1 is obtained by fitting the case lid portion 3 from above. If the side surface of the fitting portion 16 of the case lid portion 3 is coated with an adhesive, it cannot be removed.

6 to 9 show another embodiment of the present invention. In this example, the mounting positions of the conductive terminals are provided at both ends of the temperature-sensitive reed switch device.

FIG. 6A is a side view of the temperature-sensitive reed switch device, and FIG. 6B is a bottom view of the same. This temperature sensitive reed switch device
30, the case body 31, the case lid 32, the conductive terminal 33,
It is composed of a mounting bracket 34. Incidentally, FIG. 6 (b)
Reference numeral 35 denotes an insertion hole used at the time of spot welding similar to the above-mentioned embodiment.

As shown in FIG. 7, the case main body 31 is provided with an accommodation recess 36 for accommodating the temperature-sensitive reed switch body 6 on the central upper surface side, and the temperature-sensitive reed switch body 6 is projected to the left and right sides of the accommodation recess 36. An accommodating groove portion 37 for accommodating the parts is provided, and further, a reed groove portion 38 through which the reed portion of the temperature-sensitive reed switch body 6 is inserted is provided on the outside thereof. Outside the lead groove 38, there is a stepped portion that accommodates the conductive terminal 33.
39 is provided, and mounting portions 40 for mounting the conductive terminals 33 are formed on both end sides of the step portion 39 so that contact with the lead portion arranged on the lower side surface of the step portion 39 can be made. Has become. The insertion hole 35 is provided on the bottom surface side of the case body 31 at the position where the contact can be made.

As shown in FIG. 8, the case lid portion 32 has a flat portion 41 on the lower surface side in the center, which is brought into contact with the outer peripheral frame portion of the accommodation recess 36 of the case body 31, and on the left and right sides thereof, the case body 31. A convex portion 42 that abuts on the upper surface of the step portion 39 that is the mounting position of the conductive terminal is formed. On the flat portion 41 in the inward direction of the convex portion 42, a groove-shaped convex portion 43 that fits into the lead groove portion 38 of the case body 31, and a housing convex portion 44 that fits into the housing groove portion 37 of the case body 31. The case lid portion 32 is formed with the lead groove portion 38 and the groove-shaped convex portion 43, and the accommodation groove portion 37 and the accommodation convex portion.
The case body 31 is covered by fitting with 44. The housing convex portion 44 presses the protruding portion of the temperature-sensitive reed switch body 6, and the groove-shaped convex portion 43 works to press the lead portion.

As shown in FIG. 9, the conductive terminal 33 is a terminal formed of a substantially inverted L-shaped metal piece, and the entire width is such that it can be inserted into the mounting portion 40 of the case body 31 without any gap. The lower tip is formed in the shape of a sword. Further, a flat surface portion slightly larger than the width is provided at the upper end portion, and this portion serves as a fitting portion 45 welded to the lead portion of the temperature-sensitive reed switch body.

Since the mounting bracket 34 is the one shown in FIGS. 5 (a) and 5 (b), its details are omitted.

In the temperature-sensitive reed switch device 30 configured as described above, as in the case of the temperature-sensitive reed switch device 1 described above, the reed portion of the temperature-sensitive reed switch body 6 is bent in the same direction with a predetermined width to form a case. When the conductive terminal 33 is housed in the housing recess 36 of the main body 31 and attached from both ends of the case main body 31, the lead portion and the fitting portion 45 of the conductive terminal 33 intersect on the insertion hole 35 of the case main body 31. Therefore, it is welded by spot welding or the like. Next, the mounting metal fitting 34 is attached and the case lid 32 is placed on the case main body 31 to form the temperature-sensitive reed switch device 30 shown in FIG.

In the above description, after the temperature-sensitive reed switch body 6 is housed in the housing recess or 36, the conductive terminal 4 or 33
It was stated that the conductive terminals 4 or 33 were attached to the case body 2 or 31 first, and then the temperature-sensitive reed switch body 6 was placed in the accommodation recess 7 or 36 and welded. However, the same effect can be obtained.

The case used in the above-mentioned embodiment may be made of thermosetting or thermoplastic plastic. Also,
When the material of the cases is thermoplastic, the upper and lower cases may be welded to each other at their joints by an ultrasonic welder.

In addition, a protrusion that holds the mounting bracket may be provided at a portion of the case body 2 to which the mounting bracket is mounted to reinforce the mounting bracket.

Further, the mounting position of the conductive terminal and the protruding direction thereof are not limited to those in the above embodiment.

[Effects of the Invention] As described in detail above, the temperature-sensitive reed switch device of the present invention holds the temperature-sensitive magnetic body whose magnetic characteristics change in response to a change in ambient temperature and the temperature-sensitive magnetic body. A temperature-sensitive reed switch body including at least a magnet and a contact portion that opens and closes according to a change in magnetic characteristics of the temperature-sensitive magnetic body,
An insertion hole for accommodating the temperature-sensitive reed switch body and having a conductive terminal connected to the lead portion of the accommodated temperature-sensitive reed switch body, and allowing the conductive terminal and the reed portion to be welded from the outside. Since the case is equipped with a case, only by housing the temperature-sensitive reed switch body in the case, the conductive terminal and the lead part can be easily welded, and the manufacturing process can be reduced. High-precision alignment is possible without using a jig, and there is an advantage that the temperature-sensitive reed switch body can be easily assembled without damage.

[Brief description of drawings]

1 to 5 show an embodiment of the present invention. FIG. 1 is a perspective view of a temperature sensitive reed switch device, FIG. 2 is a sectional view of a case body of the switch device, and FIG. ) Is a bottom view, FIG. 3 is a side view of (a) of the case lid to be attached to the case body, FIG. 3 (b) is a bottom view, and FIG. 4 is a conductive terminal attached to the case body. Front view, (b) is a side view, FIG. 5 is a mounting bracket for a temperature-sensitive reed switch device, (a) is a plan view, and (b) is a side view. FIGS. 6 to 9 show another embodiment of the present invention. FIG. 6 shows a temperature sensitive reed switch device having a different terminal portion. (A) is an assembled side view, (b) is a plan view, and FIG. 6 is a cross-sectional view of the case main body of FIG. 6, FIG. 8 is a side view of the case lid part to be attached to the case main body of FIG. 7, (b) is a bottom view, and FIG.
The perspective view of the conductive terminal attached to the case main body of the figure.
10 to 12 are conventional examples, FIG. 10 is a cross-sectional view of the temperature-sensitive reed switch body, FIG. 11 is a perspective view in which a terminal is attached to the temperature-sensitive reed switch, and FIG. It is a perspective view which carried out the mold formation of the warm reed switch. 1,30… Temperature sensitive reed switch, 2,31… Case body, 3,32…
Case lid, 4, 33 ... Conductive terminal, 5 ... Mounting bracket,
6 ... Temperature-sensitive reed switch body, 14, 35 ... Insertion hole

Claims (1)

[Scope of utility model registration request] 1. A temperature-sensitive magnetic body whose magnetic characteristics change in response to a change in ambient temperature, a magnet that holds the temperature-sensitive magnetic body, and a contact portion that opens and closes according to a change in the magnetic characteristics of the temperature-sensitive magnetic body. And a temperature-sensitive reed switch body having at least the position of the temperature-sensitive reed switch body, and a conductive terminal connected to the lead portion of the housed temperature-sensitive reed switch body. A temperature-sensitive reed switch, comprising a case provided with an insertion hole that allows the reed portion to be welded from the outside.