TWI467614B - Pressure response switch and connector unit - Google Patents

Description

Pressure response switch and joint unit

The present invention relates to a pressure responsive switch and a joint unit for starting or stopping a refrigerant compressor or the like for a refrigeration cycle of a refrigeration or air-conditioning apparatus, etc., in detail, relating to having a refrigerant flowing in a refrigeration cycle or The bellows body of the pressure deformation of the refrigerant of the temperature sensing cylinder uses a ring mechanism interlocked with the bellows body to open/close the pressure response switch of the switch, and the joint unit used in the pressure response switch.

For example, as disclosed in Japanese Laid-Open Patent Publication No. Hei 10-334780 (Patent Document 1). The pressure responsive switch has a low pressure side bellows portion and a high pressure side bellows portion. Each of the bellows portions is provided with a cover (the bellows cylinders 24a and 25a), and a joint (fluid connection portions 24d and 25d) is fixed to one end of the bellows cylinder. At the other end, a quadrangular hand guard 24e, 25e is integrally formed. A bellows (corrugated tubes 24f, 25f) are accommodated in the cover, and a refrigerant is introduced into the bellows through a through hole of the joint. Then, the bellows is deformed according to the pressure of its internal refrigerant, and the mechanical switch is actuated by a ring mechanism that is interlocked with the bellows.

Moreover, the cover of each bellows part (the bellows cylinders 24a and 25a) is screwed by fixing screws (fastening screws 24h and 25h), and is attached to the main body side unit.

Fig. 16 is a view showing the fixing structure of the joint of the pressure responsive switch and the bellows which are the same as those of the above-mentioned Patent Document 1. The bellows b is fixed to the cover a having the quadrangular flange portion a1 by various bonding methods such as soldering, waxing, and welding. Inside. Further, the joint c is fixed to the end of the cover a by welding, and the through hole of the joint c is guided into the bellows b. Then, the joint side unit including the cover a, the bellows b, and the joint c is screwed to the four corners of the flange portion a1 of the cover a by the fixing screw d, thereby being attached to the main body side unit. Further, an actuating portion having a ring mechanism interlocking with the bellows b is disposed in the body side unit.

Prior technical literature Patent literature

Patent Document 1: Japanese Patent Laid-Open No. Hei 10-334780

In the conventional pressure-responsive switch shown in the above-mentioned Patent Document 1 or FIG. 16 , the cover (the bellows cylinder in Patent Document 1) and the four screws are used as the fixing structure of the joint and the bellows, so that it is costly. problem.

The object of the present invention is to improve the fixing structure of the joint and the bellows in the pressure responsive switch and to reduce the cost.

The pressure-responsive switch according to claim 1 is characterized by comprising: a joint unit that joins the bellows to the joint; a reinforcing plate that incorporates the joint unit; and a support box that mounts the reinforcing plate and a mechanical switch that is interlocked with the bellows; Forming an insertion hole through which the connector of the joint unit is inserted, and inserting the joint of the joint unit from the back side of the reinforcing plate to the insertion hole, and the reinforcing plate is The joint unit is clamped into the support box in a manner of being clamped into the support box, so that the joint unit is attached to the support box.

The pressure-responsive switch according to claim 2, wherein the pressure-responsive switch of the first aspect of the invention is characterized in that: the insertion hole for inserting the connector of the connector unit and the rectangular notch extending from the insertion hole are formed on the support box; a slit that can be press-fitted into the slit press-fitting portion of the outer peripheral portion of the notch portion is formed in the joint of the joint unit, and the slit press-fitting portion is pressed into the slit of the joint via the insertion hole of the support box, thereby The aforementioned joint is press-fitted and fixed to the aforementioned support box.

A pressure-responsive switch according to claim 3, wherein the pressure-responsive switch of the first aspect is formed on the support box, and the press-fit hole for inserting the joint of the joint unit is formed in the support box, and the joint is pressed into the press-in hole in the axial direction. Thereby, the aforementioned joint is press-fitted and fixed to the aforementioned support box.

The pressure-responsive switch according to any one of claims 1 to 3, wherein the tempered plate is incorporated in the reinforcing plate together with the joint unit to actuate the actuating portion of the mechanical switch in conjunction with the bellows.

The pressure-responsive switch according to any one of claims 1 to 4, wherein the root of the bellows side of the joint is a corner post, and the inserting hole of the reinforcing plate is a polygon matching the corner post. hole.

A pressure-responsive switch according to claim 6 is the pressure-responsive switch according to claim 5, wherein the corner of the corner post of the joint of the joint unit is riveted to the support box side in a state where the joint unit is attached to the support box.

A pressure-responsive switch according to any one of claims 1 to 6, wherein the temperature-responsive switch is provided with a temperature sensing tube for mounting the aforementioned joint unit In the state of the support box, a capillary that communicates with the temperature sensing cylinder is connected to the joint of the joint unit.

The pressure-responsive switch according to any one of claims 1 to 7, wherein the inner side and/or the outer side of the bellows of the joint unit is provided to restrict the radial direction of the bellows relative to the axis. Deformed bellows guide.

The joint unit of claim 9 is characterized in that it is a joint unit used in the pressure-responsive switch of the fifth aspect or the sixth aspect, and the joint is integrally formed with the aforementioned reinforcing plate which is a joint portion with the bellows. The joint portion having a larger diameter of the insertion hole and the corner post portion constituting the root portion of the corner post are formed with the slit at a position separated from the joint portion of the corner post portion by a thickness of the reinforcing plate.

The joint unit of claim 10 is the joint unit according to claim 9, wherein the bellows guide rod that restricts the radial deformation of the bellows with respect to the axis is provided on the inner side and/or the outer side of the bellows.

According to the pressure responsive switch of the first aspect, the bellows directly engages the joint, and the joint unit is mounted on the reinforcing plate, and the joint is press-fitted into the support box by sandwiching the joint unit with the support box, Miniaturization is not required as in previous covers or screws.

According to the pressure response switch of the second aspect of the invention, in addition to the effect of the first aspect, the portion of the support box in which the connector is inserted is a through hole, so that a member such as a bottom plate of the support box is provided around the joint, so that it is not open. Support the box and maintain the strength of the support box. Moreover, the gap press-in portion is pressed in from the lateral direction The gap of the joint can be firmly fixed even if the force of the upper and lower directions (axial direction) of the joint unit is applied.

According to the pressure response switch of the third aspect of the invention, in addition to the effect of the first aspect, the portion of the support box in which the socket is inserted is a press-fit hole, so that a member such as a bottom plate of the support box is provided around the joint, so that it is not open. Support the box and maintain the strength of the support box. Further, since the joint is press-fitted into the press-fitting hole in the axial direction, the attachment of the joint unit becomes easy.

According to the pressure response switch of the fourth aspect, in addition to the effects of the first to third aspects, the actuating portion is incorporated in the reinforcing plate together with the joint unit, so that it can be integrally installed as the assembled components, and the combined work can be performed. It's easy.

According to the pressure response switch of the fifth aspect, in addition to the effects of the first to fourth aspects, the corner post portion of the joint is fitted into the polygonal insertion hole of the reinforcing plate, thereby preventing the rotation of the joint unit relative to the reinforcing plate. So that it can be fixed.

According to the pressure response switch of the sixth aspect, in addition to the effect of the fifth aspect, the corner of the joint corner post is riveted to the side of the support box in a state in which the joint unit is attached, so that the joint unit can be surely fixed to the support box.

According to the pressure response switch of the seventh aspect, the temperature switch having any one of the first to sixth aspects can be constructed.

According to the pressure response switch of the eighth aspect, in addition to the effects of the first to seventh aspects, the deformation of the bellows in the radial direction is restricted, so that the load on the bellows is relatively uniform, and the pressure resistance of the bellows is improved.

According to the pressure responsive switch of the ninth aspect, the same effects as those of the fifth or sixth aspect can be obtained.

According to the pressure response switch of the tenth aspect, in addition to the effect of the ninth aspect, the deformation of the bellows in the radial direction is restricted, so that the load on the bellows is relatively uniform, and the pressure resistance of the bellows is improved.

Next, an embodiment of the pressure responsive switch and the joint unit of the present invention will be described with reference to the drawings. 1 to 4 are views showing a process of attaching the assembly unit of the first embodiment of the invention to a support box, and FIG. 1 is an external perspective view of the assembled component before being mounted in the support box, and FIG. 2 is a component assembly. FIG. 3 is an external perspective view showing the state in which the insertion hole of the support box is inserted, and FIG. 3 is a perspective view showing the state in which the slit portion of the support box is press-fitted into the slit portion of the assembly unit, and FIG. 4 is a fixed assembly of the assembly unit. An external perspective view of the installation state of the support box. 5 is a front perspective view of the joint unit, FIG. 6 is a perspective view of the joint unit and the reinforcing plate, and FIG. 7 is a perspective view of the assembled unit of the joint unit and the actuating portion incorporated in the reinforcing plate, and FIG. 8 is a joint unit. FIG. 9 is a side elevational view of the pressure-responsive switch of the embodiment, a front view, a front view, a bottom view, and a front view of the state in which the cover has been removed.

In the figure, the 1 series joint unit, the 2 series reinforcing plate, the 3 series support box, the 4 series actuating part, the 5 series as the mechanical switch micro switch, and the 6 series outer cover. Further, the 10 series is incorporated in the reinforcing plate 2 with the assembly unit of the joint unit 1 and the actuating unit 4.

As shown in Fig. 5, the joint unit 1 is obtained by joining the bellows 12 to the joint 11 made of brass by various joining methods such as soldering, brazing, and welding. The joint 11 is formed by cutting, and includes a cylindrical joint portion 111 that joins the bellows 12, a hexagonal portion 112 that is formed as a "corner portion" of a hexagonal column, and an outer portion. A horn joint portion 113 having a male thread 113a is formed in the circumference. Further, two slit portions 112a are formed on the sides of the hexagonal portion 112 near the joint portion 111. Further, a horn nut for connecting a pipe (fluid introduction pipe) (not shown) is attached to the horn joint portion 113.

As shown in FIG. 6, the reinforcing plate 2 is formed by punching and bending of a metal plate, and has a bottom plate 21, two side plates 22, a top plate 23, and a front plate 24. An insertion hole 21a through which the joint 11 (hexagonal portion 112) of the joint unit 1 is inserted is formed in the bottom plate 21. The insertion hole 21a is a hexagonal hole matching the hexagonal column of the hexagonal portion 112. In each of the side plates 22 and the top plate 23, fixing claws 22a and 23a are formed at two end portions on the opposite side to the front plate 24. Further, a range adjustment screw hole 23b and an operation pressure difference adjustment screw hole 23c are formed in the top plate 23. An operation range restricting hole 24a, a range display window 24b, and a differential pressure display window 24c are formed on the front plate 24.

The joint unit 1 is such that the hexagonal portion 112 is fitted to the insertion hole 21a of the bottom plate 21, and is attached to the reinforcing plate 2 as shown in FIG. Further, as shown in FIGS. 7 and 8, on the reinforcing plate 2, the actuating portion 4 is attached to the bellows 12 side of the joint unit 1. Thereby, the assembly unit 10 is constructed. The actuating portion 4 has an actuating metal fitting 41, a fine movement position adjusting screw 42, an actuating pressure adjusting spring 43, a reinforcing piece 44, and a range adjusting screw 45. The actuating pressure adjusting spring 43 is disposed between the actuating metal fitting 41 and the reinforcing piece 44, and adjusts the elastic force of the actuating pressure adjusting spring 43 to the bellows 12 by adjusting the screwing amount of the range adjusting screw 45. Although the illustration is omitted, the operating pressure difference is set by operating the pressure difference adjustment screw.

The actuating metal fitting 41 is formed by punching and bending of a metal plate, and has a substrate 41a that abuts against the top of the bellows 12, and one end of the substrate 41a. The actuator rod 41b that extends at a substantially right angle to the substrate 41a and the female screw portion 41c that rises from the other end portion of the substrate 41a. Then, the actuating metal fitting 41 is pivotally supported by the shaft 41d between the side plates 22, 22 of the reinforcing plate 2, and the actuating metal fitting 41 can be rotated by the reinforcing plate 2. Further, a regulating plate 41e (see FIG. 8) formed at an end portion of the substrate 41a is inserted into the operating range restricting hole 24a of the reinforcing plate 2, thereby restricting the range of rotation of the actuating metal fitting 41.

Further, the fine movement position adjusting screw 42 passes through the actuating lever 41b, and is biased against the elastic force of the actuating lever 41b with respect to the base plate 41a, and is screwed into a female screw (not shown) of the female screw portion 41c. Therefore, the angle of the actuating lever 41b with respect to the substrate 41a can be finely adjusted by the tightening of the micro-action position adjusting screw 42. Thereby, the angle of the actuating lever 41b can be finely adjusted, and the operation can be surely performed in accordance with the set pressure, so that the movement deviation due to the mounting error or the like can be eliminated.

The actuation unit 4 is configured as follows. By the movement of the bellows 12, the actuating metal fitting 41 is rotated against the elastic force of the actuating pressure adjusting spring 43, and is interlocked with the actuating lever 41b of the actuating metal fitting 41 to open/close the microswitch 5. Further, the micro switch 5 is provided with a terminal 51 (see FIGS. 9 and 10) for connecting a control line (not shown).

As shown in FIG. 1, the support box 3 is formed by punching and bending of a metal plate, and has a bottom plate 31, a spine plate 32, and a top plate 33. A circular insertion hole 31a for inserting the joint 11 (hexagonal portion 112) of the joint unit 1 is formed on the bottom plate 31, and a rectangular notch portion 31b extending from the insertion hole 31a is formed. Portions on both sides of the notch portion 31b are provided as the slit press-fitting portions 31c and 31c. The size of the opposing gap between the slit press-fitting portions 31c and 31c and the interval between the two slit portions 112a and 112a of the joint 1 can be made to the slit portion of the joint 1. 112a and 112a are pressed into the slit press-fitting portions 31c and 31c. Further, a lead extraction hole 31d for extracting a lead connected to the micro switch 5 is formed on the bottom plate 31.

Six fixing holes 32a for inserting the six fixing claws 22a and 23a of the reinforcing plate 2, respectively, are formed on the spine plate 32 of the support case 3. Further, a fixing boss 32b for fixing the pressure responsive switch to a freezing device or the like is formed on the spine plate 32. Further, an adjustment screw hole 32c is formed in which the micro-action position adjusting screw 42 is closer to the inner side than the fixing boss 32b.

As shown in FIG. 5, in the hexagonal portion 112 of the joint 11, the height of the root portion on the joint portion 111 side (the length in the direction of the axis L) D1 and the thickness of the bottom plate 21 of the reinforcing plate 2 are the same size. Further, the width (length in the direction of the axis L) D2 of the slit portion 112a and the thickness of the bottom plate 31 of the support box 3 are the same size. Thereby, as shown in FIG. 7 and FIG. 8, in the state in which the assembly unit 10 is formed, the joint portion 111 of the joint 11 abuts against the bottom plate 21, and as shown in FIG. 8, the inner surface of the upper side of the slit portion 112a and the bottom plate are provided. The surface of 21 becomes the same side.

The assembly unit 10 is mounted to the support box 3 in the following manner. First, as shown in Fig. 1, the fixing claws 22a, 23a of the reinforcing plate 2 are directed toward the side of the spine plate 32 of the support case 3, as shown in Fig. 2, the hexagonal portion 112 of the joint 11 is inserted into the insertion hole 31a of the bottom plate 31 of the support case 3. . In this state, since the slit portion 112a is parallel to the slit press-fitting portion 31c, the assembly unit 10 is moved toward the spine plate 32 side as shown in Fig. 3, and the slit press-fitting portion 31c is press-fitted into the slit portion 112a. At this time, the fixing claws 22a and 23a are fitted into the fixing holes 32a of the spine plate 32. Then, as shown in FIG. 4, the fixing grips 22a and 23a are bent, and the reinforcing plate 2 itself is fixed to the support case 3. Further, the corner A portion of the hexagonal column of the hexagonal portion 112 of the joint 11 is riveted to the side of the support box 3. By the riveting, the side portion sandwiched by the corner A of the hexagonal column is slightly Protruding to the outside, the joint 11 and the support box 3 are further firmly fixed.

When it is mounted as described above, the bottom plate 31 of the support case 3 fixed to the slit portion 112a and the lower end surface of the joint portion 111 of the joint 11 are press-fitted, and the bottom plate 21 of the reinforcing plate 2 is sandwiched. Further, the hexagonal portion 112 of the joint 11 is fitted to the hexagonal insertion hole 21a of the reinforcing plate 2, so that the rotation of the joint unit 1 around the axis L with respect to the reinforcing plate 2 can be prevented. Thereby, the assembly unit 10 is securely fixed to the support box 3.

Further, the micro-action position adjusting screw 42 is located at the position of the adjusting screw hole 32c of the spine plate 32. That is, the micro-actuation position adjusting screw 42 is not on the front side of the pressure-responsive switch, so that the user or the like can be prevented from inadvertently operating the micro-action position adjusting screw 42.

The above pressure response relationship detects the pressure of various fluids such as refrigerant of the compressor of the refrigeration cycle, but the temperature switch shown in Fig. 10 may be constructed by the structure of the pressure response switch. The temperature-on relationship of FIG. 10 is to connect the capillary tube 30 that communicates with the temperature sensing cylinder 20 by the bracket 14 to the horn joint portion 113 of the joint 11. In addition, in the display portion of the main body of Figs. 9 and 10, the scale display with respect to pressure is shown in Fig. 9, and Fig. 10 is displayed on the scale of temperature.

In the first embodiment, only one joint unit 1 is provided. However, as shown in Patent Document 1, a joint unit is provided for each of the high pressure side pressure and the low pressure side pressure, and the joint unit 1 of the first embodiment is applied. The reinforcing plate 2 and the support box 3 have the same mounting structure.

11 to 13 are longitudinal cross-sectional views showing other embodiments of the joint unit, and the same elements as those in Fig. 11 are denoted by the same reference numerals in Fig. 12 and Fig. 13 and detailed description thereof will be omitted.

The joint unit 7A shown in Fig. 11 is a joint of a bellows 72 to a brass joint 71 by various joining methods such as soldering, waxing, and welding. The joint 71 is formed by cutting, and includes a cylindrical joint portion 711 that joins the bellows 72, a hexagonal portion 712 that is formed as a "corner portion" of a hexagonal column, a horn joint portion 713 that has a male screw 713a formed on the outer circumference thereof, and The bellows inner guide 714 is provided as a "corrugated pipe guide" from the joint portion 711 inside the bellows 72. Further, two slit portions 712a are formed on both sides of the hexagonal portion 712 near the joint portion 711 side. Further, an introduction hole 71a for introducing a fluid from a pipe (fluid introduction pipe) (not shown) into the bellows 72 is formed at the center of the joint 71.

In the joint unit 7A, the height of the root portion on the joint portion 711 side (the length in the direction of the axis L) D1 is also the same as the thickness of the bottom plate 21 of the reinforcing plate 2, and the width of the slit portion 712a (the length in the direction of the axis L) D2 is the same size as the thickness of the bottom plate 31 of the aforementioned support box 3. Further, in the joint unit 7A, as in the above-described embodiment, the bottom plate 31 of the support box 3 is press-fitted and fixed to the slit portion 712a, and the lower end surface of the joint portion 711 of the bottom plate 31 of the support box 3 and the joint 71 is provided. The bottom plate 21 of the reinforcing plate 2 is sandwiched. Further, the hexagonal portion 712 of the joint 71 is fitted into the insertion hole 21a of the hexagonal shape of the reinforcing plate 2, so that the rotation of the joint unit 7A around the axis L with respect to the reinforcing plate 2 can be prevented. Thereby, the assembly unit in which the joint unit 7A and the above-described actuator are incorporated in the reinforcing plate 2 is surely fixed to the support box 3.

The bellows inner guide rod 714 has a cylindrical shape centered on the axis L, and its outer diameter is slightly smaller than the inner diameter of the bellows 72 (the diameter of the valley portion). Thereby, the side surface of the bellows inner guide rod 714 is adjacent to the inner side of the bellows 72. Actuating metal The fitting 41 abuts against the top portion 72a of the bellows 72. For example, when an excessive high pressure is applied, the bellows 72 fixes both ends of the axis L direction by actuating the metal fitting 41 and the joint 71. Therefore, when the bellows 72 is to be deformed, one portion of the bellows of the bellows 72 is also deformed in the direction of the axis L, but the deformation of the bellows 72 in the radial direction with respect to the axis L is restricted. Therefore, the load on the bellows 72 is relatively uniform, and the pressure resistance of the bellows 72 becomes high.

The joint unit 7B shown in FIG. 12 includes a joint 71, a joint portion 711, a hexagon portion 712, a horn joint portion 713, and a "corrugated pipe guide" which is provided outside the bellows 72 from the outer peripheral end portion of the joint portion 711. Bellows outer guide rod 715. The configuration and effect of fixing the group assembly incorporating the joint unit 7B to the support box 3 are the same as those for the joint unit 7A of FIG.

The bellows outer guide rod 715 has a cylindrical shape centered on the axis L, and its inner diameter is slightly larger than the outer diameter of the bellows 72 (the diameter of the mountain portion). Thereby, the inner surface of the bellows outer guide rod 715 is in a state of being adjacent to the outer surface of the bellows 72. Therefore, as in the foregoing, for example, when excessive pressure is applied to cause the bellows 72 to be deformed, a portion of the bellows of the bellows 72 is also deformed in the direction of the axis L, but the radial direction of the bellows 72 is deformed with respect to the axis L. restricted. Therefore, the load on the bellows 72 is relatively uniform, and the pressure resistance of the bellows 72 becomes high.

The joint unit 7C shown in FIG. 13 includes a joint 71, a joint portion 711, a hexagon portion 712, a horn joint portion 713, a traveling inner guide rod 714 provided inside the bellows 72 from the joint portion 711, and a peripheral end portion from the joint portion 711. The bellows outer guide rod 715 is disposed outside the bellows 72. The structure and effect of fixing the assembled component incorporating the joint unit 7C to the support box 3 and the joint for FIG. The description of unit 7A is the same.

The effect of the bellows inner guiding rod 714 and the bellows outer guiding rod 715 is the same as that of the joint unit 7A of FIG. 11 and the joint unit 7B of FIG. 12, and the joint unit 7C is guided by the bellows inner guide rod 714 and the bellows. The action of both of the rods 715, for example, when excessive pressure is applied, and the bellows 72 is to be deformed, the deformation of the bellows 72 in the radial direction with respect to the axis L is restricted, and the load applied to the bellows 72 becomes variable. It is uniform, so that the pressure resistance of the bellows 72 becomes high.

In the above embodiment, the bellows inner guide rod 714 and the bellows outer guide rod 715 are integrally formed with the joint portion 711 (joint 11), but the bellows inner guide rod 714 and the bellows outer guide rod 715 are both formed. Alternatively, either the concave portion and the convex portion may be fitted into the joint portion 711 to be integrally formed.

Fig. 14 is an external perspective view showing the assembly of the bellows and the joint including the pressure responsive switch according to the second embodiment of the present invention before the support box, and Fig. 15 is a pressure responsive switch according to the second embodiment of the present invention. A perspective view of the appearance of the assembled components in a state of being fixedly mounted to the support box. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals as in the first embodiment, and the detailed description thereof will be omitted.

The joint unit 1' of the second embodiment differs from the joint unit 1 of the first embodiment in that a slit portion 112a is formed in the hexagonal portion 112 of the joint unit 1 of the first embodiment as a "corner portion". In the hexagonal portion 112' of the "corner portion" of the joint unit 1' in the second embodiment, no slit portion is formed. Further, the difference between the support case 3' of the second embodiment and the support case 3 of the first embodiment is the bottom plate of the support case 3 of the first embodiment. The insertion hole 31a and the notch portion 31b are formed in the 31, and the hexagonal pressure for inserting the hexagonal portion 112' of the joint 11 is not formed on the bottom plate 31 of the support case 3' of the second embodiment. Into the hole 31e.

The press-fitting hole 31e is formed at a position corresponding to the notch portion 31b of the first embodiment. Further, the inner diameter of the press-fitting hole 31e is formed to be slightly smaller than the outer diameter of the hexagonal portion 112'. Then, by pressing the hexagonal portion 112' of the joint 11 into the press-fitting hole 31e in the direction of the axis L, the assembly unit 10 to which the joint unit 1' is attached is fixed to the support box 3'. Further, the corner A portion of the hexagonal column of the hexagonal portion 112' of the joint 11 is riveted to the side of the support box 3. By this riveting, the side surface portion sandwiched by the corner A of the hexagonal column is slightly protruded outward, and the joint 11 and the support box 3' are further firmly fixed. That is, the bottom plate 21 serving as the reinforcing plate 2 is in a state of being sandwiched between the bottom plate 31 of the support box 3' and the lower end surface of the joint portion 111 of the joint 11. Further, the hexagonal portion 112' of the joint 11 is fitted into the hexagonal insertion hole 21a of the reinforcing plate 2 and the press-fitting hole 31e of the support case 3', so that the rotation of the joint unit 1' about the axis L can be prevented. Thereby, the assembly unit 10 is surely fixed to the support box 3'.

The joint unit 1 of the first embodiment and the joint unit 1' of the second embodiment may be provided with a bellows inner guide rod 714 as shown in FIG. 11, or may be provided with a bellows outer guide rod 715 as shown in FIG. A bellows inner guide 714 and a bellows outer guide 715 may be provided as shown in FIG.

In the first embodiment and the second embodiment, the case where the corner post portion of the joint is a hexagonal column and the insertion hole of the reinforcing plate has a hexagonal shape will be described as an example. However, the corner post portion and the insertion hole may be as long as In order to prevent the shape of the joint from rotating, the corner column portion may be a triangular column, a quadrangular column, a pentagonal column, or other positive polygonal columns, and the insertion hole of the reinforcing plate may be a polygon matching each corner portion. Moreover, the corner post and the polygon may also be in the shape of a star. Further, the shape of the press-fitting hole 31 of the support case 3' and the corner post portion (hexagonal portion 112') of the joint 11 of the second embodiment are also the same as described above.

1‧‧‧Connector unit

1'‧‧‧Connector unit

2‧‧‧Strengthened board

3‧‧‧Support box

3'‧‧‧Support box

4‧‧‧Operation Department

5‧‧‧Micro switch (mechanical switch)

6‧‧‧ Cover

7A‧‧‧Connector unit

7B‧‧‧Connector unit

7C‧‧‧Connector unit

10‧‧‧Incorporating components

11‧‧‧Connector

12‧‧‧ Bellows

14‧‧‧ bracket

20‧‧ ‧temperature tube

21‧‧‧floor

21a‧‧‧ inserted through hole

22‧‧‧ side panels

22a‧‧‧Fixed claws

23‧‧‧ top board

23a‧‧‧Fixed claws

23b‧‧‧Scope adjustment screw hole

23c‧‧‧Pressure difference adjustment screw hole

24‧‧‧ front board

24a‧‧‧Corrugated tube

24b‧‧‧Scope display window

24c‧‧‧Differential pressure display window

30‧‧‧ Capillary

31‧‧‧floor

31a‧‧‧ inserted through hole

31b‧‧‧Gap section

31c‧‧‧Gap press

31d‧‧‧ lead extraction hole

31e‧‧‧ Pressed into the hole

32‧‧‧ ridge board

32a‧‧‧Fixed holes

32b‧‧‧Fixed bushings

32c‧‧‧Adjusting screw holes

33‧‧‧ top board

41‧‧‧Working metal fittings

41a‧‧‧Substrate

41b‧‧‧Action rod

41c‧‧‧ Female thread

41d‧‧‧Axis

41e‧‧‧Restricted board

42‧‧‧Miniature position adjustment screw

43‧‧‧ actuation pressure adjustment spring

44‧‧‧Strengthen

45‧‧‧Range adjustment screw

51‧‧‧ terminals

71‧‧‧Connectors

71a‧‧‧Importing holes

72‧‧‧ Bellows

72a‧‧‧ top

111‧‧‧ joints

112‧‧‧Hexagon (corner section)

112'‧‧‧Hexagon (corner section)

112a‧‧‧Gap section (gap)

113‧‧‧ horn joint

113a‧‧‧ male thread

711‧‧‧ joints

712‧‧‧Hexagon (corner section)

712a‧‧‧Gap section (gap)

713‧‧‧ horn joint

713a‧‧‧ male thread

714‧‧‧ Bellows guide (corrugated pipe guide)

715‧‧‧ bellows outer guide (corrugated pipe guide)

A‧‧‧ corner

A‧‧‧ Cover

A1‧‧‧Flange

B‧‧‧ bellows

c‧‧‧Connector

D‧‧‧ fixing screws

L‧‧‧ axis

Fig. 1 is an external perspective view showing the assembly of the bellows and the joint including the pressure responsive switch according to the first embodiment of the present invention before being attached to the support box.

Fig. 2 is a perspective view showing the appearance of the insertion of the pressure-responsive switch of the first embodiment of the present invention into the insertion hole of the support box.

Fig. 3 is an external perspective view showing a state in which a slit press-fitting portion of a support box is press-fitted into a slit portion of a component of a pressure-responsive switch according to a first embodiment of the present invention.

Fig. 4 is an external perspective view showing a state in which the assembly of the pressure-responsive switch according to the first embodiment of the present invention is fixed to the support box.

Fig. 5 is a front elevational perspective view of the joint unit according to the first embodiment of the present invention.

Fig. 6 is a perspective view of a joint unit and a reinforcing plate according to the first embodiment of the present invention.

Fig. 7 is a perspective view showing an assembly unit in which a joint unit and an actuating unit according to the first embodiment of the present invention are incorporated in a reinforcing plate.

Fig. 8 is a side view showing the assembly unit in which the joint unit and the actuating unit according to the first embodiment of the present invention are incorporated in a reinforcing plate.

9(A) to 9(D) are a plan view, a front view, a bottom view, and a front view of the pressure-receiving switch according to the first embodiment of the present invention.

10(A) to (D) are diagrams showing a temperature switch according to a first embodiment of the present invention. Top view of the pressure-responsive switch, front view, bottom view, and front view of the removed cover state.

Fig. 11 is a longitudinal sectional view showing a joint unit in which a bellows inner guide rod is provided inside a bellows according to an embodiment of the present invention.

Fig. 12 is a longitudinal sectional view showing a joint unit in which a bellows outer guide rod is provided outside a bellows according to an embodiment of the present invention.

Fig. 13 is a longitudinal sectional view showing a joint unit in which a bellows inner guide rod is provided inside a bellows according to an embodiment of the present invention, and a bellows outer guide rod is provided outside.

Fig. 14 is an external perspective view showing the assembly of the bellows and the joint including the pressure responsive switch according to the second embodiment of the present invention before being attached to the support box.

Fig. 15 is an external perspective view showing a state in which the assembly of the pressure-responsive switch according to the second embodiment of the present invention is fixedly attached to the support case.

16(A) and 16(B) are views showing the fixing structure of the joint of the previous pressure-responsive switch and the bellows.

1‧‧‧Connector unit

2‧‧‧Strengthened board

3‧‧‧Support box

4‧‧‧Operation Department

10‧‧‧Incorporating components

11‧‧‧Connector

12‧‧‧ Bellows

21‧‧‧floor

21a‧‧‧ inserted through hole

22‧‧‧ side panels

22a‧‧‧Fixed claws

23a‧‧‧Fixed claws

31‧‧‧floor

31a‧‧‧ inserted through hole

31b‧‧‧Gap section

31c‧‧‧Gap press

31d‧‧‧ lead extraction hole

32‧‧‧ ridge board

32a‧‧‧Fixed holes

32b‧‧‧Fixed bushings

32c‧‧‧Adjusting screw holes

33‧‧‧ top board

41‧‧‧Working metal fittings

41a‧‧‧Substrate

41b‧‧‧Action rod

41c‧‧‧ Female thread

42‧‧‧Miniature position adjustment screw

43‧‧‧ actuation pressure adjustment spring

44‧‧‧Strengthen

111‧‧‧ joints

112‧‧‧Hexagon (corner section)

112a‧‧‧Gap section (gap)

113‧‧‧ horn joint

Claims (12)

A pressure-responsive switch comprising: a joint unit for joining a bellows to a joint; a reinforcing plate incorporated in the joint unit; and a support box for mounting the reinforcing plate and a mechanical switch interlocking with the bellows; Forming an insertion hole through which the connector of the joint unit is inserted, and inserting the joint of the joint unit from the back side of the reinforcing plate to the insertion hole, and the joint plate is connected to the reinforcing plate by the reinforcing plate In the manner in which the support box is sandwiched, the joint is press-fitted and fixed to the support box, so that the joint unit is mounted on the support box. The pressure response switch of claim 1, wherein an insertion hole for inserting the connector of the connector unit and a rectangular notch extending from the insertion hole are formed on the support box, and the connector is connected to the connector Forming a slit that can be pressed into the slit press-fitting portion of the outer peripheral portion of the notch portion, and pressing the slit press-fitting portion into the slit of the joint via the insertion hole of the support box, thereby press-fixing the joint to the aforementioned Support box. The pressure-responsive switch of claim 1, wherein a press-in hole for inserting the aforementioned joint of the joint unit is formed on the support box, and the joint is pressed into the press-fitting hole in the axial direction, thereby The aforementioned joint is press-fitted and fixed to the aforementioned support box. The pressure responsive switch according to any one of claims 1 to 3, wherein the actuating portion for actuating the mechanical switch in conjunction with the bellows is incorporated in the reinforcing plate together with the joint unit. The pressure response switch of claim 1 or 3, wherein the root portion of the aforementioned bellows side is a corner post, and the insertion hole of the reinforcing plate is a polygonal hole matching the corner post. The pressure response switch of claim 2, wherein the root portion of the aforementioned bellows side is a corner post, and the insertion hole of the reinforcing plate is a polygonal hole matching the corner post. The pressure responsive switch according to claim 5, wherein the corner of the corner post of the joint of the joint unit is riveted to the support box side in a state where the joint unit is attached to the support box. The pressure responsive switch according to claim 6, wherein the corner of the corner post of the joint of the joint unit is riveted to the support box side in a state where the joint unit is attached to the support box. The pressure-responsive switch according to any one of claims 1 to 3, wherein a temperature-sensing cylinder is provided, and a capillary connected to the temperature sensing cylinder is connected to the joint unit in a state in which the joint unit is attached to the support box. The aforementioned joint. The pressure-responsive switch according to any one of claims 1 to 3, wherein a bellows guide that restricts the radial deformation of the bellows with respect to the axis is provided on the inner side and/or the outer side of the bellows of the joint unit. A joint unit characterized in that it is subjected to the stress of claim 6 a joint unit used in the switch, wherein the joint is integrally formed with a joint portion having a larger diameter than the insertion hole of the reinforcing plate which is a joint portion of the bellows, and a corner portion constituting a root portion of the corner post; The slit is formed at a position separated from the joint portion of the corner portion by the thickness of the reinforcing plate. The joint unit of claim 11, wherein the bellows guide rod that deforms the bellows in a radial direction with respect to the axis is provided on the inner side and/or the outer side of the bellows.