JP4628778B2 - Insert molded part for switch, manufacturing method thereof, and pressure switch - Google Patents

Description

  The present invention integrally molds a metal terminal provided with a fixed contact where a switch operates by contact and separation with a movable contact, a connection terminal electrically connected to the outside, and a resin terminal block. The present invention relates to an insert molded part for a switch, a manufacturing method thereof, and a pressure switch using the insert molded part for a switch.

  Conventionally, in various switches such as pressure switches, the switch is turned on and off by moving and moving the movable contact by the action of pressure with respect to the fixed contact communicating with the connection terminal to the outside. However, if moisture enters between these contacts, conduction failure will occur, and if foreign matter such as fibers or contamination enters and is caught between these contacts, contact between the contacts will be hindered. Continuity failure. In applications where it is necessary to prevent poor conduction due to moisture and foreign matter, the stationary contact and the movable contact are housed in a space that is airtightly blocked from the outside.

  Such a switch is manufactured using an insert molded part in which a metal terminal provided with a connection terminal and a fixed contact and a resin terminal block are integrally formed. Conventionally, injection molding is performed by fixing a terminal to a mold having the configuration shown in FIG. The mold 111 includes an upper mold 112, a lower mold 113, and a fixing pin 108, and the terminal 103 is mounted on the mounting table 116 of the lower mold 113.

  An insertion hole 115 is opened in the wall surface 112a of the upper mold 112 corresponding to the upper surface of the shape of the cavity 114, and a long standing portion 104 serving as a connection terminal is inserted into the insertion hole 115. In this state, the terminal 103 is pressed downward by the rod-shaped fixing pin 108 inserted into the through hole 109 of the upper mold 112, and thereby the terminal 103 is fixed to the lower mold 113 so that there is no trouble at the time of injection molding. Next, molten resin is injected from the injection port 117 and injection molding is performed to obtain an insert molded part.

  As shown in FIG. 24, the mark of the fixing pin 108 remains as a hole 102c on the terminal block 102 of the insert molded part 101 obtained in this way. As shown in FIG. 25, in the subsequent switch manufacturing process, UV is formed on the upper surface of the insert molded part 101 in order to ensure the waterproof and airtightness of the contact storage space 110 in which the fixed contact 106 and the movable contact 123 are stored. Although a bond 122 of a curable resin such as a curable resin or an epoxy resin is applied, bubbles are likely to be generated inside the hole 102 c when the bond 122 is applied. When bubbles are generated, the waterproofness and airtightness are lowered, and moisture and foreign matter are liable to enter from the outside. That is, since the boundary between the insert-molded terminal block 102 and the terminal 103 is usually not airtight, moisture and foreign matter from the outside pass through the bubbles of the bond 122 and reach the bottom of the hole 102c. These easily pass through the boundary between the table 102 and the terminal 103 and enter the contact housing space 110.

  Even if the bond 122 is applied twice in order to prevent the generation of bubbles in the hole 102c, it is difficult to sufficiently release the bubbles if the bond flow is poor, and the number of processes is increased.

  In order to ensure sufficient waterproofness and airtightness, it is conceivable to plug the hole 102c using a resin plug having a diameter slightly larger than the diameter of the hole 102c, but it is desirable in terms of increasing the number of parts. Absent.

  Further, if time is taken after the insert molding until the bond 122 is applied, the bottom of the hole 102c is exposed, which causes moisture and foreign matter to enter the contact housing space 110.

Patent Document 1 and Patent Document 2 describe a method of fixing a metal member for insert to a mold, but the connection terminal is extended from the upper surface of the terminal block, and the periphery of the fixed contact is covered with the terminal block. In addition, there is no suggestion of any technique that can fix the terminal to the mold so that the hole 102c formed by the fixing pin 108 is not left in the switch-molded part having a specific shape.
JP 2002-361634 A JP-A-1-289518

  The present invention provides a switch insert-molded part that can sufficiently ensure waterproofness and airtightness of a space for accommodating a switch contact, and can prevent conduction failure due to moisture intrusion into the switch contact or biting of foreign matter, a manufacturing method thereof, and pressure The purpose is to provide a switch.

In the insert molded part for a switch according to the present invention, a pair of long and short standing parts are formed so as to face each other upward from both sides of the metal plate, and the long standing parts constitute a connection terminal. And the bottom surface of the metal plate includes a terminal constituting a fixed contact,
Using the mold composed of the upper mold and the lower mold, the terminal is placed on the lower mold, and the insertion hole opened upward from the wall surface corresponding to the upper surface of the cavity shape in the upper mold By clamping these molds with the long standing part inserted,
While holding down the bottom of the terminal from below by the lower mold,
The terminal block made of resin is obtained by fixing the terminal to the mold in a state where both upper ends of the pair of standing portions of the terminal are pressed from above by the upper mold, and then performing injection molding. It is formed integrally with the terminal.

According to the method of manufacturing an insert molded part for a switch of the present invention, a pair of long and short standing parts are formed so as to face each other upward from both sides of the metal plate, and the long standing parts are connected to each other. Comprising a terminal, the bottom of the metal plate comprising a fixed contact;
Using the mold composed of the upper mold and the lower mold, the terminal is placed on the lower mold, and the insertion hole opened upward from the wall surface corresponding to the upper surface of the cavity shape in the upper mold By clamping these molds with the long standing part inserted,
While holding down the bottom of the terminal from below by the lower mold,
By fixing the terminals to the mold in a state where both upper ends of the pair of standing portions of the terminals are pressed together from above by the upper mold, a resin terminal block is obtained by performing injection molding. It is characterized by being integrated with the terminal.

  In the above invention, in addition to the long standing portion serving as the connection terminal, the terminal is provided with a short standing portion standing so as to face the long standing portion. The terminals are fixed to the mold in a state where the upper ends of the standing portions are pressed by the upper mold and the bottom surfaces of the terminals are pressed by the lower mold. Therefore, without using a fixing pin, the terminal can be fixed to the mold so that there is no hindrance such as misalignment at the time of injection molding, and a hole which is a mark of the fixing pin is formed on the upper surface of the obtained insert molded part. Does not remain.

For this reason, when a bond is applied to the upper surface of the insert-molded part in the subsequent manufacturing process of the switch, bubbles are less likely to be generated in the bond, and moisture and foreign matter can be prevented from passing through the bond. Furthermore, the upper surface of the terminal is not exposed from the hole due to the trace of the fixing pin,
Since the whole is covered with a sufficiently thick resin by the terminal block, it is possible to sufficiently block the entry of moisture and foreign matter from the upper surface of the terminal.

  The insert molded part of the present invention can be used as a part of various switches. In particular, the movable contact is arranged to face the fixed contact on the bottom surface of the terminal in the insert molded part, and the movable contact moves according to the pressure. This is suitable for a pressure switch configured such that the movable contact and the fixed contact come in contact with and away from each other.

The method of manufacturing an insert molded part for a switch according to the present invention is characterized in that, when the mold is clamped, the short standing portion is elastically deformed by pressing with the upper mold.
In this manner, the variation in the dimensions of the terminals can be absorbed by elastically deforming the short standing portion. Specifically, the short standing part of the terminal is tilted to the long standing part side or the opposite side, and is made to stand at an angle with respect to the vertical direction. When this terminal is housed in the mold and clamped, the short standing part that is sandwiched and pressed between the upper mold and the lower mold is elastically deformed so that it rotates around its base end. Or the short standing part itself is elastically deformed so as to be curved, and further tilted obliquely so as to match the predetermined height width between the upper mold and the lower mold at the time of clamping. It is pressed in the pressed state.

Therefore, even when there are variations in the dimensions of the terminals, the upper end of the short standing portion can always be pressed by the upper mold.
In the method for manufacturing a switch insert molded part of the present invention, an elastic member is provided in the insertion hole in the upper mold,
When the mold is clamped, the long standing portion inserted into the insertion hole is urged from above by the elastic member.

  Thus, by providing an elastic member in the insertion hole and biasing the long standing portion, variations in the dimensions of the terminals can be absorbed. That is, when the terminal is housed in the mold with the long standing portion inserted into the insertion hole of the upper mold and clamped, the elastic member contracts according to the length of the long standing portion, Since the long standing portion is urged by the elastic force due to the contraction, the upper end of the long standing portion can always be pressed even when the terminal dimensions vary.

In the insert molded part for a switch according to the present invention, a pair of long and short standing parts are formed so as to face each other upward from both sides of the metal plate, and the long standing parts constitute a connection terminal. And the bottom surface of the metal plate includes a terminal constituting a fixed contact,
The long standing portion of the terminal has a stepped portion that is pressed by a wall surface corresponding to the upper surface of the cavity shape of the upper die when a terminal block is formed using a mold composed of an upper die and a lower die. Formed,
While placing the terminal on the lower mold of the mold, and inserting the long standing part of the terminal into the insertion hole opened upward from the wall surface of the upper mold, By clamping the mold,
While holding down the bottom of the terminal from below by the lower mold,
From above the upper mold, the upper end of the short standing part of the terminal and the stepped part of the long standing part are both pressed by the wall surface to the mold. A resin terminal block is formed integrally with the terminal by fixing and then injection molding.

In the above invention, in the long standing portion serving as the connection terminal, the step is set at a position that substantially matches the height width at the time of clamping between the upper mold wall surface corresponding to the upper surface of the cavity shape and the lower mold. The terminal is fixed to the mold in a state where both the stepped portion and the short standing portion are pressed by the wall surface of the upper mold and the bottom surface of the terminal is pressed by the lower mold. Therefore, without using a fixing pin, the terminal can be fixed to the mold so that there is no hindrance such as misalignment at the time of injection molding, and a hole which is a mark of the fixing pin is formed on the upper surface of the obtained insert molded part. Does not remain.

  For this reason, when a bond is applied to the upper surface of the insert-molded part in the subsequent manufacturing process of the switch, bubbles are less likely to be generated in the bond, and moisture and foreign matter can be prevented from passing through the bond. Further, the upper surface of the terminal is not exposed from the hole due to the trace of the fixing pin, and the entire surface is covered with the resin having a sufficient thickness by the terminal block, so that the entry of moisture and foreign matter from the upper surface of the terminal can be sufficiently blocked.

  The above-mentioned insert molded parts of each invention can be used as various switch parts such as pressure switches and temperature switches. Specific examples of pressure switches include pressure switches for refrigeration equipment, refrigeration equipment, and air conditioning equipment, refrigerant pressure detection switches for car air conditioners, pressure switches for hydraulic pressure and gas pressure detection, power steering switches, and the like.

  According to the present invention, it is possible to sufficiently ensure waterproofness and airtightness of the space in which the switch contact is accommodated, and to prevent conduction failure due to moisture intrusion into the switch contact or biting of foreign matter.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a view showing terminals of a switch insert-molded part according to an embodiment of the present invention. FIG. 1 (a) is a top view, FIG. 1 (b) is a front view, and FIG. It is -A sectional drawing. FIG. 2 is a perspective view of the terminal shown in FIG.

  The terminal 3 shown in the figure is formed with a long standing portion 4 and a short standing portion 5 that are vertically raised so as to face each other by bending both sides of the metal plate upward. The long standing portion 4 constitutes a connection terminal for electrical connection with the outside. A fixed contact 6 is provided on the bottom surface of the terminal 3.

  A terminal block is integrally formed on the terminal 3 using the mold shown in FIG. The mold 11 includes an upper mold 12 and a lower mold 13, and the lower mold 13 is provided with a columnar mounting table 16 on which the terminal 3 is mounted. A cylindrical recess space 19 is formed in the upper mold 12 by an upper wall surface 12 a corresponding to the cavity-shaped upper surface and a side wall surface 12 b corresponding to the cavity-shaped side peripheral surface. By clamping the upper mold 12 and the lower mold 13, the mounting table 16 of the lower mold 13 is disposed inside the recessed space 19 of the upper mold 12, and the molten resin is formed by the gap between the upper mold 12 and the lower mold 13. A cavity into which is injected. An insertion hole 15 is opened upward on the wall surface 12a of the upper mold 12, and the long standing portion 4 of the terminal 3 is inserted into the insertion hole 15 and fitted.

  FIG. 4 is a cross-sectional view showing a state in which the terminal 3 is housed in the mold and clamped. As shown in the figure, the cavity 14 formed by clamping the mold 11 faces the wall surface 12a of the upper mold 12 and the mounting table 16 of the lower mold 13 so as to face each other. The short standing portion 5 is sandwiched between the mounting table 16 of the lower mold 13 and the wall surface 12a of the upper mold 12, and is pressed from above and below by these surfaces.

  Further, the long standing portion 4 inserted into the insertion hole 15 of the upper die 12 is sandwiched between the mounting table 16 of the lower die 13 and the upper end portion 15a of the insertion hole 15 of the upper die 12, and these It is held down from the top and bottom.

In this way, the upper die 12 is pressed from above with the upper end 4 a of the long standing portion 4 and the upper end portion 5 a of the short standing portion 5, and the lower surface of the terminal 3 is placed on the lower die 13. The terminal 3 is fixed inside the mold 11 while being pressed from below by the mounting table 16. Next, injection molding is performed by injecting molten resin from the injection port 17 into the cavity 14 of the mold 11 that has been clamped.

  The insert molded part thus obtained is shown in FIG. FIG. 7A is a top view, and FIG. 7B is a cross-sectional view taken along line AA. In this manner, the terminal block 2 is formed integrally with the terminal 3, and the long standing portion 4 serving as a connection terminal protrudes from the upper surface 2a of the cylindrical terminal block 2 whose upper side is closed and extends upward. The fixed contact 6 on the bottom surface of the terminal 3 is exposed in the internal space surrounded by the cylindrical side portion 2 b of the terminal block 2. The short standing portion 5 of the terminal 3 is embedded in the resin so that the upper end portion 5 a of the short standing portion 5 is located on the upper surface 2 a of the terminal block 2.

The resin for forming the terminal block 2 is not particularly limited, and various resins can be used. For example, PPS (polyphenylene sulfide) resin is preferable.
In the present embodiment, since the fixing pin 108 of FIG. 23 is not used to fix the terminal 3 to the mold 11, no hole remains on the upper surface of the insert molded part 1, and the upper surface 2 a of the terminal block 2 is flat. The entire upper portion of the terminal 3 is uniformly covered with a sufficiently thick resin. For this reason, in the subsequent switch manufacturing process, when a bond of a curable resin such as a UV curable resin or an epoxy resin is applied to the upper surface of the insert molded part 1 in order to ensure waterproofness and airtightness, the periphery of the bond is good. In addition, since the generation of bubbles can be suppressed, moisture and foreign matter can be prevented from entering from the outside through the bubbles. Further, it is not necessary to apply the bond twice due to the generation of bubbles, and the step of checking for the presence of bubbles can be omitted.

  Further, the upper surface of the terminal 3 is not exposed from the hole formed by the fixing pin 108 or the like in FIG. 23 and is entirely covered with a sufficient thickness by the terminal block 2, so Intrusion of moisture and adhesion of foreign matter can be prevented.

  Thus, the insert-molded component 1 of this embodiment is highly waterproof and airtight, and the terminal block 2 does not have a hole due to the fixing pin 108 or the like, so that the terminal block 2 has sufficient strength. Have.

  FIG. 5 is a cross-sectional view illustrating another embodiment of the present invention, and shows a state in which a terminal is housed in a mold and clamped. In this embodiment, the basic configuration is the same as in the above-described embodiment, but the upper end portion of the insertion hole 15 of the upper mold 12 into which the long standing portion 4 of the terminal 3 is inserted is elastically upward. A contractible elastic member 18 is provided. As the elastic member 18, a spring member or the like can be used, but any member can be used as long as it can urge the long standing portion 4 by an elastic force.

  The long standing portion 4 in the terminal 3 housed in the mold 11 is an elastic member 18 provided at the upper end portion of the insertion hole 15, and the upper end portion 4 a is pressed by elastic force. That is, as shown in the enlarged view of FIG. 6, the long standing portion 4 is inserted into the insertion hole 15 with respect to the elastic member 18 provided at the upper end portion of the insertion hole 15 (FIG. 6A). By clamping the mold, the upper end 4a presses the elastic member 18, and the elastic member 18 is contracted upward against the elastic force (FIG. 6B). In other words, the long standing portion 4 is urged downward by the elastic member 18.

  As shown in FIG. 5, the long standing portion 4 is pressed by the elastic member 18, the short standing portion 5 is pressed by the wall surface 12 a of the upper mold 12 facing the cavity 14, and the lower surface of the terminal 3 is The terminal 3 is fixed inside the mold 11 while being pressed from below by the mounting table 16 of the lower mold 13. Next, injection molding is performed by injecting molten resin from the injection port 17 into the cavity 14 of the mold 11 that has been clamped.

In the embodiment described above, as shown in FIG. 4, the distance between the upper end portion 15 a of the insertion hole 15 of the upper mold 12 and the mounting table 16 of the lower mold 13 is fixed in a state where the mold 11 is clamped. Has been. However, when the insert molded part 1 is mass-produced, the dimensions of the respective terminals 3 are slightly varied, so that the height of the long standing part 4 of the terminals 3 is slightly shorter than the predetermined dimension. In this case, a gap is generated between the upper end portion 15a of the insertion hole 15 and the upper end portion 4a of the long standing portion 4, and the upper end portion 4a of the long standing portion 4 cannot be sufficiently pressed. There is. Moreover, when the height dimension of the elongate standing part 4 becomes longer than a predetermined dimension, the upper mold | type 12 and the lower mold | type 13 will not fit.

  However, in this embodiment, since the elastic member 18 is provided at the upper end portion of the insertion hole 15, the elastic member 18 contracts upward according to the length of the long upright portion 4, and variations in the dimensions of the terminals are caused. Can be absorbed. Note that the lower end portion of the elastic member 18 is located slightly below the height position of the upper end portion 4a of the long standing portion 4 when the terminal 3 having a normal dimension is fixed to the mold 11. It is desirable to install the elastic member 18.

  FIG. 8 is a view showing a terminal of an insert-molded part according to another embodiment of the present invention. FIG. 8 (a) is a top view, FIG. 8 (b) is a front view, and FIG. It is A sectional drawing. FIG. 9 is a perspective view of the terminal shown in FIG.

  In this embodiment, the basic configuration is the same as that of the above-described embodiment, but the short standing portion 5 is set up with an angle θ with respect to the vertical axis and inclined obliquely outward. ing. FIG. 10 shows a state in which the terminal 3 is housed in the mold and the mold is clamped, and an enlarged view of the vicinity of the short standing portion 5 is shown in FIG. As shown in the figure, in the clamped state, the short standing portion 5 is sandwiched between the wall surface 12a of the upper die 12 and the mounting table 16, and the base end portion 5b is pivoted by the pressing force from above and below. As shown in FIG. 4, the outer side is further tilted outward and fixed in a state of being rotated against the elastic force. In addition, as shown in FIG. 11B, the short standing portion 5 may be elastically deformed in a curved shape by pressing force from above and below by mold clamping, and may be fixed in a curved state. Further, the vertical height of the short standing portion 5 is set slightly longer than the height width of the cavity 14 so that the upper die 12 and the lower die 13 are pressed from above and below during clamping.

  As shown in FIG. 10, the long standing portion 4 is pressed from above by the upper end portion 15 a of the insertion hole 15 in the upper die 12, and the wall surface of the upper die 12 where the short standing portion 5 faces the cavity 14. The terminal 3 is fixed to the inside of the mold 11 in a state where the terminal 3 is pressed from above and the lower surface of the terminal 3 is pressed from below by the mounting table 16 of the lower mold 13. Next, injection molding is performed by injecting molten resin from the injection port 17 into the cavity 14 of the mold 11 that has been clamped.

  The distance between the wall surface 12a of the upper mold 12 and the mounting table 16 of the lower mold 13 in a state where the mold 11 is clamped is always constant, but when the insert molded component 1 is mass-produced, Since the dimensions slightly vary, when the height of the short standing part 5 of the terminal 3 is slightly shorter than the predetermined dimension, the wall surface 12a and the upper end part 5a of the short standing part 5 In some cases, a gap may be formed between the upper ends 5a of the short standing portions 5 during mold clamping.

  However, in the present embodiment, the short standing portion 5 is tilted and the normal height dimension in the vertical direction is set to the height width of the cavity 14 at the time of clamping, that is, the wall surface 12a of the upper mold 12 and the lower mold 13. Since it is slightly longer than the distance to the mounting table 16, the short standing portion 5 is always pressed from above by the upper mold 12. Therefore, variations in the dimensions of the terminals 3 can be absorbed.

In this embodiment, the short standing portion 5 is inclined outward as shown in FIG. 8, but the short standing portion 5 is inclined inward toward the long standing portion 4 as shown in FIG. The terminal 3 may be used.
FIG. 13 is a view showing an insert-molded part in which a terminal block is integrated with the terminal of FIG. 8, FIG. 13 (a) is a top view, and FIG. 13 (b) is an AA cross-sectional view. In this manner, the terminal block 2 is formed integrally with the terminal 3, and the long standing portion 4 serving as a connection terminal protrudes from the upper surface 2a of the cylindrical terminal block 2 whose upper side is closed and extends upward. The fixed contact 6 on the bottom surface of the terminal 3 is exposed in the internal space surrounded by the cylindrical side portion 2 b of the terminal block 2. The short standing portion 5 of the terminal 3 is embedded in the resin so that the upper end portion 5 a of the short standing portion 5 is located on the upper surface 2 a of the terminal block 2.

  FIG. 14 is a view showing a terminal of an insert molded part according to another embodiment of the present invention. FIG. 14 (a) is a top view, FIG. 14 (b) is a front view, and FIG. It is A sectional drawing. 15 is a perspective view of the terminal shown in FIG.

  In the present embodiment, a step is provided on the long standing portion 5 with a wide width at a predetermined height position. As shown in FIG. 16, the height of the stepped portion 7 is substantially equal to the distance between the wall surface 12 a of the upper mold 12 in which the terminal 3 is accommodated and the mounting table 16 of the lower mold 13. In the long standing portion 4 inserted into the insertion hole 15 of the upper die 12, the stepped portion 7 is pressed from above by the wall surface 12 a of the upper die 12. Similarly, the short standing portion 5 is also pressed from above by the wall surface 12 a of the upper mold 12.

  As described above, the upper die 12 holds two points of the step portion 7 of the long standing portion 4 and the upper end portion 5a of the short standing portion 5, and the lower surface of the terminal 3 is placed on the lower die 13. The terminal 3 is fixed inside the mold 11 while being pressed from below by the mounting table 16. Next, injection molding is performed by injecting molten resin from the injection port 17 into the cavity 14 of the mold 11 that has been clamped.

  17 is a view showing an insert-molded part in which a terminal block is integrated with the terminal of FIG. 14, FIG. 17 (a) is a top view, and FIG. 17 (b) is an AA cross-sectional view. In this manner, the terminal block 2 is formed integrally with the terminal 3, and the long standing portion 4 serving as a connection terminal protrudes from the upper surface 2a of the cylindrical terminal block 2 whose upper side is closed and extends upward. The fixed contact 6 on the bottom surface of the terminal 3 is exposed in the internal space surrounded by the cylindrical side portion 2 b of the terminal block 2. The upper part 5a of the short standing part 5 of the terminal 3 and the lower part of the long standing part 4 from the step part 7 are located on the upper surface 2a of the terminal base 2 at the upper part of the terminal base 2. So that it is embedded in the resin.

  FIG. 18 is a view showing a terminal of an insert-molded component according to another embodiment of the present invention. FIG. 18 (a) is a top view, FIG. 18 (b) is a front view, and FIG. It is A sectional drawing. 19 is a perspective view of the terminal shown in FIG. In the present embodiment, as in the above-described embodiment, the long standing portion 4 is provided with the stepped portion 7 and, as shown in FIGS. 8 and 9, the short standing portion 5 is provided with an angle, Stands upward while tilted outward. FIG. 20 shows a state in which the terminal 3 is housed in the mold and clamped. As shown in the drawing, in the state where the mold is clamped, the stepped portion 7 in the long standing portion 4 and the short standing portion 5 together are the wall surface 12a of the upper die 12 and the mounting table 16 of the lower die 13. The short standing portion 5 is further inclined to the outside by elasticity due to the pressing force of the upper die 12 and the lower die 13.

  As described above, the upper die 12 holds two points of the step portion 7 of the long standing portion 4 and the upper end portion 5a of the short standing portion 5, and the lower surface of the terminal 3 is placed on the lower die 13. The terminal 3 is fixed inside the mold 11 while being pressed from below by the mounting table 16. Next, injection molding is performed by injecting molten resin from the injection port 17 into the cavity 14 of the mold 11 that has been clamped.

The insert molded parts of the embodiments described above are used as parts such as a pressure switch and a temperature switch. FIG. 21 is a cross-sectional view showing an example of a pressure switch using the molded part for insert of the present invention. The pressure switch 21 is integrally provided with a conductive body 33 with a joint 34 formed with a screwing portion 34a to be screwed into a device to be connected such as an automatic transmission of an automobile. A diaphragm 29 sandwiched between a stopper 28 and a cap 30 is housed inside the body 33. The diaphragm 29, the stopper 28, and the cap 30 are formed of a conductive material such as stainless steel, and these are welded and integrated on the outer peripheral side.

  On the upper surface of the stopper 28, a stainless steel disc spring 27 having an opening formed in the center and an outer peripheral end bent upward is arranged, and a conductive guide member 26 is arranged on the disc spring 27. Yes. The outer peripheral end portion of the disc spring 27 is pressed by the lower end portion of the guide member 26 and comes into contact with the inner wall of the body 33, so that the movable contact 23 is securely connected to the body 33 via the guide member 26 and the disc spring 27. I try to conduct.

  An opening is formed in the center of the guide member 26, and a non-conductive shaft member 25 made of resin or the like is slidably inserted into the opening. The lower end portion of the shaft member 25 is pressed by the deformation of the diaphragm 29 and moves upward.

  The insert molding component 1 is disposed on the guide member 26, and the opening edge portion 33 a of the body 33 is caulked to the shoulder portion of the terminal block 2, whereby the opening edge portion 33 a of the body 33 and the O-ring 31 are connected. The diaphragm structure including the diaphragm 29, the stopper 28 and the cap 30, the disc spring 27, the guide member 26, and the terminal block 2 are sandwiched and fixed from above and below.

  A contact plate 24 having a movable contact 23 provided at the end thereof is connected to the upper end of the guide member 26 by caulking, and the contact plate 24 moves up and down in accordance with the movement of the shaft member 25, whereby the movable contact 23 is moved. The contact is made with respect to the fixed contact 6. A bond 22 is applied to the upper surface of the terminal block 2 exposed from the opening edge 33a of the body 33, thereby ensuring airtightness in the contact storage space 10 where the movable contact 23 and the fixed contact 6 face each other. .

  This pressure switch operates as follows. When pressure such as hydraulic pressure in the working chamber 35 acts on the diaphragm 29, the central portion of the diaphragm 29 gradually rises, and when the central portion of the diaphragm 29 rises above the neutral position, the diaphragm 29 reverses upward, and the stopper 28 Stops in contact with the lower end surface of the. As the diaphragm 29 is reversed, the shaft member 25 moves to the raised position, the contact plate 24 is pressed by the shaft member 25, and the movable contact 23 contacts the fixed contact 6. In such a state, the current of the circuit connected to the connection terminal (long standing portion 4) flows through the terminal 3, the contact plate 24, the guide member 26, and the disc spring 27 to the body 33 (or The body is grounded from the disc spring 27 through the diaphragm structure comprising the diaphragm 29, the stopper 28 and the cap 30 to the body 33). This short circuit signal is detected by, for example, the vehicle ECU and used as various control signals.

  On the other hand, when the pressure in the working chamber 35 decreases from this state, the central portion of the diaphragm 29 gradually descends, and when the inversion region of the diaphragm 29 is exceeded, the diaphragm 29 reverses and the shaft member 25 descends, and the contact plate 24 moves downward and the movable contact 23 is separated from the fixed contact 6 and is turned off.

FIG. 22 is a cross-sectional view showing an example of a temperature switch using the insert-molded component of the present invention. The temperature switch 41 is used for applications such as opening and closing of a power supply circuit of an electric heater according to the temperature of the heated object to protect the heated object from overheating. In the temperature switch 41, a dish-like bimetal 42 is disposed on a heat-sensitive member 43 whose lower surface forms a heat-sensitive surface. A conductive guide member 26 is disposed on the bimetal 42, and a nonconductive shaft member 25 made of resin or the like is slidably inserted into an opening formed in the central portion of the guide member 26. The shaft member 25 moves up and down in accordance with the reversing operation of the bimetal 42. On the guide member 26, the insert molding component 1 is arranged, and the opening edge 4 of the body 44 is formed on the shoulder of the terminal block 2.
4a is fixed by caulking.

  A contact plate 24 having a movable contact 23 provided at an end thereof is connected to the guide member 26 by caulking. The contact plate 24 moves up and down by pressing by the shaft member 25, so that the movable contact 23 contacts and separates from the fixed contact 6. A bond 22 is applied to the upper surface of the terminal block 2 exposed from the opening edge 44a of the body 44, thereby ensuring airtightness in the contact accommodating space 10 where the movable contact 23 and the fixed contact 6 face each other. .

  The temperature switch 41 operates as follows. When the temperature of the heat-sensitive member 43 facing the temperature detection target such as the heated body becomes equal to or higher than a predetermined value, the bimetal 42 is deformed by heating and reverses upward to press the shaft member 25. As a result, the shaft member 25 is moved up, the contact plate 24 is pressed by the shaft member 25, and the movable contact 23 contacts the fixed contact 6. In such a state, the current of the circuit connected to the connection terminal (long erecting portion 4) flows through the terminal 3, the contact plate 24, the guide member 26, and the heat sensitive member 43 to the body 44, and the body ground. Is done.

  On the other hand, when the temperature of the heat-sensitive member 43 is lowered from this state, the bimetal 42 is reversed downward, the shaft member 25 is lowered, the contact plate 24 is moved downward, and the movable contact 23 is separated from the fixed contact 6 and turned off. It becomes.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to these embodiment, In the range which does not deviate from the summary, various deformation | transformation and change are possible.

FIG. 1 is a view showing a terminal of an insert-molded component according to an embodiment of the present invention. FIG. 1 (a) is a top view, FIG. 1 (b) is a front view, and FIG. It is sectional drawing. FIG. 2 is a perspective view of the terminal shown in FIG. FIG. 3 is a cross-sectional view of a mold for housing the terminals of FIG. 1 and insert-molding them. FIG. 4 is a cross-sectional view showing a state where the terminal of FIG. 1 is housed in the mold and clamped. FIG. 5 is a cross-sectional view showing a state in which the terminal of FIG. 1 is housed in a mold in which an elastic member is provided in the insertion hole of the upper mold and the mold is clamped. 6 (a) and 6 (b) are enlarged cross-sectional views showing the state before and after urging the long standing portion of the terminal with the elastic member of FIG. 7 is a view showing an insert-molded part in which a terminal block is integrated with the terminal of FIG. 1, FIG. 7 (a) is a top view, and FIG. 7 (b) is an AA cross-sectional view. FIG. 8 is a view showing a terminal of an insert-molded component according to another embodiment of the present invention. FIG. 8 (a) is a top view, FIG. 1 (b) is a front view, and FIG. It is A sectional drawing. FIG. 9 is a perspective view of the terminal shown in FIG. FIG. 10 is a cross-sectional view showing a state in which the terminal of FIG. 8 is housed in the mold and clamped. 11 (a) and 11 (b) are enlarged cross-sectional views showing a state where the short standing portion is pressed and elastically deformed from above and below when the terminal of FIG. 8 is fixed to the mold. It is. FIG. 12 is a cross-sectional view of a terminal in which a short standing portion is inclined inward toward a long standing portion. FIG. 13 is a view showing an insert-molded part in which a terminal block is integrated with the terminal of FIG. 8, FIG. 13 (a) is a top view, and FIG. 13 (b) is an AA cross-sectional view. FIG. 14 is a view showing a terminal of an insert molded part according to another embodiment of the present invention. FIG. 14 (a) is a top view, FIG. 14 (b) is a front view, and FIG. It is A sectional drawing. 15 is a perspective view of the terminal shown in FIG. FIG. 16 is a cross-sectional view showing a state in which the terminal of FIG. 14 is housed in the mold and clamped. 17 is a view showing an insert-molded part in which a terminal block is integrated with the terminal of FIG. 14, FIG. 17 (a) is a top view, and FIG. 17 (b) is an AA cross-sectional view. FIG. 18 is a view showing a terminal of an insert-molded component according to another embodiment of the present invention. FIG. 18 (a) is a top view, FIG. 18 (b) is a front view, and FIG. It is A sectional drawing. 19 is a perspective view of the terminal shown in FIG. 20 is a cross-sectional view showing a state in which the terminal of FIG. 18 is housed in the mold and clamped. FIG. 21 is a cross-sectional view showing a pressure switch using the insert molded part of the present invention. FIG. 22 is a cross-sectional view showing a temperature switch using the insert-molded part of the present invention. FIG. 23 is a cross-sectional view showing a conventional configuration for fixing a switch terminal to a mold. FIG. 24 is a cross-sectional view of a conventional switch insert-molded part. 25 is a partial cross-sectional view of a switch using the switch insert-molded part of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Insert molding component 2 Terminal block 2a Upper surface 2b Side part 3 Terminal 4 Long standing part (connection terminal)
4a Upper end portion 5 Short standing portion 5a Upper end portion 5b Base end portion 6 Fixed contact 7 Step portion 10 Contact storage space 11 Mold 12 Upper die 12a Wall surface 12b Wall surface 13 Lower die 14 Cavity 15 Insertion hole 15a Upper end portion 16 Mounting base 17 Inlet 18 Elastic member 19 Recessed space 21 Pressure switch 22 Bond 23 Movable contact 24 Contact plate 25 Shaft member 26 Guide member 27 Belleville spring 28 Stopper 29 Diaphragm 30 Cap 31 O-ring 32 O-ring 33 Body 33a Opening edge 34 Contact 34a Threaded portion 35 Working chamber 41 Temperature switch 42 Bimetal 43 Thermal member 44 Body 44a Opening edge

Claims (6)

A pair of long and short standing parts are formed so as to face each other upward from both sides of the metal plate, the long standing parts constitute a connection terminal, and the bottom surface of the metal plate is a fixed contact The terminals comprising
An insert molded part for a switch comprising a resin terminal block,
Using the mold composed of the upper mold and the lower mold, the terminal is placed on the lower mold, and the insertion hole opened upward from the wall surface corresponding to the upper surface of the cavity shape in the upper mold By clamping these molds with the long standing part inserted,
While holding down the bottom of the terminal from below by the lower mold,
The terminal block made of resin by fixing the terminal to the mold in a state where both upper ends of the pair of standing portions of the terminal are pressed from above by the upper mold, and then performing injection molding. Is formed integrally with the terminal at least over the entire upper surface of the terminal .   A pressure switch manufactured using the insert molded part according to claim 1, wherein a movable contact is disposed opposite to a fixed contact on a bottom surface of the terminal in the insert molded part, and the movable switch according to pressure A pressure switch, wherein the movable contact and the fixed contact are contacted and separated by movement of the contact. A pair of long and short standing parts are formed so as to face each other upward from both sides of the metal plate, the long standing parts constitute a connection terminal, and the bottom surface of the metal plate is a fixed contact Prepare the terminals that make up the
Using the mold composed of the upper mold and the lower mold, the terminal is placed on the lower mold, and the insertion hole opened upward from the wall surface corresponding to the upper surface of the cavity shape in the upper mold By clamping these molds with the long standing part inserted,
While holding down the bottom of the terminal from below by the lower mold,
By fixing the terminals to the mold in a state where both upper ends of the pair of standing portions of the terminals are pressed together from above by the upper mold, a resin terminal block is obtained by performing injection molding. A method for producing an insert molded part for a switch, wherein the switch is integrated with the terminal.   The method for manufacturing an insert molded part for a switch according to claim 3, wherein the short standing portion is elastically deformed by pressing with the upper mold when the mold is clamped. An elastic member is provided in the insertion hole in the upper mold,
5. The method of manufacturing an insert molded part for a switch according to claim 3, wherein the elongated standing part inserted into the insertion hole is urged from above by the elastic member when the mold is clamped. . A pair of long and short standing parts are formed so as to face each other upward from both sides of the metal plate, the long standing parts constitute a connection terminal, and the bottom surface of the metal plate is a fixed contact The terminals comprising
An insert molded part for a switch comprising a resin terminal block,
The long standing portion of the terminal has a stepped portion that is pressed by a wall surface corresponding to the upper surface of the cavity shape of the upper die when a terminal block is formed using a mold composed of an upper die and a lower die. Formed,
While placing the terminal on the lower mold of the mold, and inserting the long standing part of the terminal into the insertion hole opened upward from the wall surface of the upper mold, By clamping the mold,
While holding down the bottom of the terminal from below by the lower mold,
More said upper die, and the upper end of the short vertical portions of the terminals from above, and the step portion of the standing portion of the long, both the mold the terminals in a state of pressing by the wall The resin-made terminal block is integrally formed with the terminal over at least the entire upper surface of the terminal by fixing to the terminal and then performing injection molding.

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