JPS639084Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a case body for a thermostat that can reduce the number of parts and be easily constructed.

Conventionally, the case body of a pressure type thermostat that opens and closes contacts in response to changes in the pressure of a temperature-sensitive gas, for example, has a cover body a as shown in FIGS. 6 to 9.
, a case body c having a U-shape in plan view with connected side plates b and b', a switch part d, and a bottom plate e to which a bellows is fixed.

That is, the lid body a and the case body c are attached by combining the protruding piece c ₁ and the locking piece c ₂ on the side of the body c into the play hole a ₁ and the locking hole a ₂ of the lid body a, respectively, and furthermore, the switch part d fits a pair of locking protrusions _d1 formed on the switch portion d into locking holes _a2 formed on the lid body a, and a pair of notches formed on the side plates b and b'.
It is held by locking a pair of locking protrusions _d2 formed on the switch part d on _b1 and _b1 ', and the bottom plate e
A pair of locking holes _c3 formed at the bottom of the main body c, L-shaped locking pieces _b2 and _b2' protruding from the side plates b and b', and a pair of locking holes formed at the bottom of the switch part d. Stop projection
Each pair of locking pieces e ₁ and locking holes formed on the bottom plate e on d ₃
The case is assembled by holding e ₂ and e ₃ by engaging and inserting them, and by bending the L-shaped locking pieces b ₂ and b ₂ ' of the side plates b and b'.

Therefore, at least four parts are required for assembly, and the assembly work is very complicated, making it impossible to manufacture economically and having poor workability.

The present invention was developed to eliminate the above-mentioned drawbacks, and the case body, which consists of a top surface, a side surface, and a closing portion that bends and extends from one end edge of the side surface, is constructed by integral molding, thereby reducing the number of parts. It is an object of the present invention to provide a case body for a thermostat that can be obtained at a low cost while making it possible to easily manage parts and improve workability in assembly.

The details of the present invention will be described below with reference to embodiments with reference to FIGS. 1 to 5. Reference numeral 1 designates a main body case made of a metal plate, which includes an upper surface portion 2, side portions 3 and 3' bent from both side edges of the upper surface portion 2 to one side, and a U-shaped cross section formed by these. The opening end is made up of a shield 4 which covers one side of the side surfaces 3 and 3' by bending each side, and these are formed by punching and bending a single metal plate. The upper surface part 2 has a mounting piece 6 having a hook-shaped mounting hole 5 on both edges in the longitudinal direction, and an insertion hole 8 for a knob shaft 7 for adjusting the sensing temperature, and an adjustment plate on one end side. 13 protruding pieces 1
A pair of locking holes 2a are formed at the other end, through which a pair of protrusions 10a formed at the upper end of the switch section 10 are inserted.
2a is formed. The side parts 3, 3' are bent in the same direction at right angles from both widthwise edges of the upper part 2, and L-shaped locking pieces 3a, 3'a are formed at the ends thereof, and the side parts 3, 3' are bent in the same direction from both widthwise edges of the upper part 2. Engagement hole 3
b, 3'b are formed at symmetrical positions on each side surface part 3, 3', and bearing holes 3c, 3'c of an actuating plate (not shown) for operating the switch part 10, and a shaft of the adjusting plate are pivotally connected. The notches 3d, 3'd are the side parts 3,
It is drilled at a symmetrical position of 3'. The sheath closing part 4 consists of a pair of side plates 4a and 4'a extending from the side parts 3 and 3' to face each other, and at least an adjustment device disposed inside the case body 1 is attached to the tips of these side plates 4a and 4'a. Notches 4a ₁ , 4 for operating the adjustment screw 11
a' ₁ and a through hole 4a ₂ which also locks the bottom plate 12;
4a′ ₂ is placed. A pair of protrusions 10a, 10a are formed at the upper end of the switch part 10, and engagement holes 3 in the side parts 3, 3' are formed on both sides of the center thereof.
A pair of locking projections 10c, 10c are provided at the lower end of the bottom plate 12 to lock into a pair of locking holes 12d, 12d formed in the bottom plate 12. has been done. The bottom plate 12 supports a bellows 12a, and a capillary tube 12b communicating with an external heat-sensitive tube (not shown) is integrally connected to the bellows 12a.
Furthermore, there are through holes 4a ₂ , 4a' ₂ in the closed body 4 at one end edge.
A pair of bent locking pieces 12c, 12c are formed on the side of the other end to engage with L-shaped locking pieces 3a, 3'a of the side surfaces 3, 3'. A pair of locking holes 12e, 12e for locking the bottom plate 12 to the main body case 1 are bored, and locking protrusions 10c, 10 formed at the lower end of the switch part 10 are provided on one end side of the locking holes 12e, 12e.
Locking holes 12d, 12d are formed to be locked to c.

The lower opening of the case body 1 is covered by these engagements.

Next, we will discuss the effect. In order to construct a thermoswitch using the integrally molded case body 1 described above, the cam plate 7 is inserted into the insertion hole 8 of the upper surface portion 2 in advance.
After attaching the knob shaft 7 having a shape, insert and attach the adjusting device and the actuating plate from the bottom opening of the case body 1, and then insert the adjusting device and the operating plate from the opening on the back side of the bow closing part 4. The locking projections 10a, 10a are fitted into the locking holes 2a, 2a of the upper surface part 2, and the projections 10b, 10b of the switch part 10 are fitted into the locking holes 2a, 2a of the upper surface part 2.
It fits into the engaging pieces 3b and 3'b formed at 3'. Finally, the bent locking pieces 12c, 12c of the bottom plate 12, which are integrated with the bellows 12a, are locked into the through holes 4a ₂ , 4a' ₂ formed in the lower part of the shutter closing part 4, and the side parts 3, 3' are locked. The bottom plate 12 is attached to the L-shaped locking pieces 3a and 3'a.
The locking holes 12e, 12e on the other end are fitted into the locking holes 12e, 12e, and the locking protrusions 10c, 10c on the switch portion 10 are fitted into the locking holes 12d, 12d on the other end side. After that, the above-mentioned L
The bottom plate 12 is fixed to the main body case 1 by caulking the ends of the letter-shaped locking pieces 3a, 3'a.

As described in detail above, the present invention includes an upper surface portion having an insertion hole for an adjustment shaft, an insertion hole for an adjustment plate, and a locking hole for a switch portion, and an end portion that is integrally connected to the upper surface portion and is bent toward one side. A pair of side parts are provided with a locking hole, an L-shaped locking piece, a notch for locking the shaft part, and a through hole for pivoting the actuating plate, and a central part that is bent and extends integrally with this side part. A main body case consisting of a notch for adjustment and a closed part with a through hole at the lower end to which a locking piece of the bottom plate is attached, a switch part installed in this main body, and an opening at the lower end of the main case. Since the thermostat case body is equipped with a bottom plate that covers the bottom plate, it is possible to reduce the number of parts and improve the workability of assembly. The case is formed by simply rubbing it, and all that is required is to attach the necessary switches and bottom plate to it, so the structure is extremely simple and has the excellent advantage of being inexpensive.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Fig. 1 is a side view of the thermostat, Fig. 2 is a front view, Fig. 3 is a perspective view of the case body, Fig. 4 is a perspective view of the switch section, and Fig. 5 is a perspective view of the bottom plate, FIGS. 6 to 9 show a conventional example, FIG. 6 is a perspective view of the lid body, FIG. 7 is a perspective view of the case body, and FIG. 8 is a rear view of the switch section. , FIG. 9 is a perspective view of the bottom plate. 1...Main body case, 2...Top surface part, 2a...Latching hole, 2b...Adjustment plate insertion hole, 3, 3'...Side part, 3a, 3'a...L-shaped locking piece ,3b,
3'b...Locking hole, 3c, 3'c...Through hole, 3d,
3'd...notch part, 4...shade closed part, 4a ₁ , 4a' ₁
...Adjustment notch, 4a ₂ , 4a' ₂ ...Through hole, 8...
...Adjustment shaft insertion hole, 10...Switch part, 10
a, 10b, 10c...protrusion, 12...bottom plate, 1
2a...bellows, 12c...locking piece, 12d...
...Latching hole, 12e...Locking hole.

Claims (1)

[Scope of utility model registration request] The upper surface part has a locking hole for locking the adjustment shaft insertion hole, the adjustment plate insertion hole, and the switch part. A pair of locking holes for locking the bottom plate, an L-shaped locking piece for locking the bottom plate at the lower end, and a notch for locking the shaft of the adjustment plate, and the shaft of the actuating plate is pivotally connected to the lower part. a pair of side surfaces having through holes, integrally connected to the side surfaces and having an adjustment notch formed in the center thereof, a through hole for engaging the locking piece of the bottom plate formed at the lower end; a main body case which is integrally connected with a bow portion formed by bending and extending from the upper surface portion, and a protrusion that engages with the locking hole in the top surface portion and which fits into the locking hole in the side surface portion; a switch portion having a pair of locking protrusions that locks into the locking hole of the bottom plate; a bent locking piece that locks into the through hole of the shy portion; and an L-shaped side portion. Consisting of a locking hole that locks the side surface by inserting a shaped locking piece and bending it, and a bottom plate that has a locking hole that locks the protrusion at the lower end of the switch and has a bellows fixed to it. A thermostat case body featuring