JPS5963629A - Thermostat - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention is directed to a thermostat which simplifies the mechanism and allows effective and appropriate setting of the load on the pressure responsive member. It is.

, thermostats used in refrigerators, room air conditioners, etc., for example, as shown in Publication No. 956'9 of 1981, detect temperature in hot part R ~ mechanical movement. One side of the actuating plate with an L-shaped side surface and the L-shaped intersection as a fulcrum is brought into contact with the heat-responsive body made of a bellows or the like to be converted, and one end of the coil and shape plate is locked on the other side of the actuating plate. The other end of the spring is screwed onto the adjusting plate to adjust the spring load, and the gllil adjusting plate is tilted using one end as a fulcrum by a cam means to adjust the spring load.
Adjusted spring load,! :The structure is such that the switch contacts are opened and closed via the actuation frame by the rotation of the actuation plate linked to the movement of the heat-responsive body, which is opposed by the thermal response body.
There are many parts and the mechanism is complicated.

Therefore, as a simplified version of this, it was
There is a device shown in Japanese Patent No. 43536, but in this case, the actuating plate is omitted and the microsinch is directly driven by a leaf spring member, and there are design obstacles in terms of the arrangement of the switch, etc. Furthermore, it is difficult to effectively and appropriately set the load of the leaf spring opposing the bellows.

The present invention has been made by focusing on the above-mentioned points, and provides an operation in which a thermally responsive body and a switch are provided facing each other and are moved in the axial direction between the two to transmit the operation of the bellows to the opening/closing operation of the switch. By providing a rod, the mechanism is simplified and the movement of the bellows is accurately transmitted to the switch, and a U-shaped leaf spring is used to set a load opposing the bellows, and the arc-shaped bent portion of the O-shaped leaf spring is The load is effectively and appropriately changed by changing the shape.

An embodiment of the present invention will be described below with reference to the drawings.

In the drawing, A is a synthetic resin casing, and the front casing A
1 and a rear casing A2, which are connected by means described later to constitute a front wall 1, a rear wall 2, and four peripheral walls 3.3', 3''.

A bellows 4 as a thermally responsive body is provided on one peripheral wall 3, and its fixing surface 4a has a bottom plate 6 to which one end of a capillary tube 5 is welded.
The tip of the capillary tube is welded into the bellows 4 in an open state using solder or the like. Although not shown, a temperature sensing portion is provided at the other end of the capillary.

A switch S is provided on the peripheral wall 3' facing the peripheral wall 3. That is, fixed contact terminals 7 and movable contact terminals 8 extending from inside to outside are fixed to the peripheral wall 3'.
A fixed contact 9 is provided at the movable contact terminal 8, and a movable contact plate 11 having a movable contact 10 is fixed to the movable contact terminal 8 in an electrically conductive state by caulking or the like. A snap actuating plate 11a is provided inside the movable contact plate 11 by a notch as is known in the art, and a quick reversal spring 12 is provided between the movable contact plate 11 and the snap actuating plate 11a. The peripheral wall 3' is further provided with a differential adjustment screw 13 for adjusting the contact spacing.

Movable surface 4b of bellows 4 and movable contact plate 11 of switch S
The snap actuating plates tia are opposed to each other, and an actuating rod 14 for transmitting the movement of the bellows 4 to the switch S is disposed between them. Immediately, the head 1 at one end of the operating rod 14
4a comes into contact with the movable surface of the bellows 4, and the locking part 14 at the other end
b is coupled to the snap actuating plate 11a, and together with the action of a leaf spring to be described later, the action of the bellows 4 is transmitted to the switch S to open and close it. At this time, the operating rod 14
is supported and guided by the groove 15a of the partition wall 15.

A leaf spring 16 is provided between the bellows 4 and the switch S to counteract the operation of the bellows 4 and set the control temperature of the controlled part.
is provided. The leaf spring 16 is made by folding a rectangular thin spring plate having a constant 11 through an arc-shaped bending part 16a to integrally form a long side actuating part 16b and a short side set part 16C in a deformed U-shape. , an insertion hole 16d is formed in the middle part of the long side actuating part 16b, and the long side actuating part 1 is formed in the installed state.
The end portion 16e of the retaining hole 16b comes into contact with a fulcrum 15b protruding from the partition wall 15 in the direction of the peripheral wall 3 that supports the bellows 4, and while the operating rod 14 is loosely fitted into the retaining hole 16d, the insertion hole 16
The peripheral edge of d comes into contact with the head 14a of the actuating rod, thereby opposing the bellows 4 via the actuating rod 14.

A drive piece 17a formed by bending a part of the sliding adjustment plate 17 comes into contact with the short side set portion 16C of the leaf spring 16, and the protrusion 1
7a1 engages in the hole 16C1.

The sliding adjustment plate 17 is located in the recess 1a of the front wall 1 of the upper cylinder A+.
The camshaft 18 is provided so as to be movable in the axial direction of the operating rod 14, and is provided with a long hole 17b facing in the direction of movement, in which the bearing portion 1b of the camshaft 18 is positioned. Although the driving piece 17a is not shown, the front wall 1
It passes through a hole provided in the. As a result of the above, the sliding adjustment plate 17 is not placed under the side force in the direction perpendicular to the direction in which the plate spring 16 extends.

(The retaining protrusion 17 is raised at one end of the hole 17I3 of the r3 rib Ii, I adjustment plate 17, and the cam plate 19 provided on the cam shaft 8 is engaged.

In addition to the rear casing Δ2G and 2, a spring spring 4'r:j city adjustment screw 20 is screwed onto the Heros circumferential wall 3 so that it can move forward and backward. Long side operating part 16
b's 1'+fl, 1 part 1 (i c at fulcrum 15b
It is further coupled to the external force than the abutting portions arranged in the row.

2I is a metal cover plate (, 1iii, a material that covers the wall 1), the cover plate 21G, 2 is a metal cover plate (= J peripheral wall 3, This connection t is bent on opposing peripheral walls 3'' and 3'' in the direction intersecting with 3'.
1. j 21a, 21a are provided, and the connecting plate 21.
At the end of I, 21a, caulking connecting pieces 21b, 21b, which position the connecting protrusion 22.22 formed on the outer surface of the peripheral wall 3''3'' inside the rear housing A2, are connected. During assembly, the caulking connecting pieces 21b, 2'l b
By crimping the ends of the lids Fj and 21 onto the connecting protrusions 22 and 22, the lids Fj and 21 are secured to the hook Δ, and at the same time, the front multiple housings Δ+, A, are secured together.

An insertion hole 21C for the camshaft 18 is formed in the center of the placing plate 2, and on both sides thereof, a take-out plate 21 (j) protruding from external force is connected. +1iIl
+ 18 is held in a stable position by the bearing part lb of the 1 wall 1.

In the above structure, the gas pressure corresponding to the temperature of the temperature sensing part is transmitted through the tube 5 (111) into the herose 4, and the pressure inside the loin is handled by the force of the spring 16 (7111).
Through I4, the operating rod 14 moves in the direction of the foot due to the difference between the loin internal pressure and the leaf spring 1::i, and the i'Ji position of the operating rod 14 is activated by the switch. The contact points 9 and 10 are opened and closed via the reversing spring 12 to the contact slope 11 by driving the nanozo actuator 11a.

To set the operating temperature, set the cam plate 19 of the camshaft 18 at a constant position, and use the adjustment screw 2o ii! : Retire.
U,... vs. I Cause 4-! 7. Adjust the spring @ weight to set the appropriate temperature for the adjustable temperature mountain.
The off-point operating temperature is set by moving the differential adjustment screw 13 back and forth.

In the second state, it is incorporated into refrigerators, room cores, etc. After installation, the operating temperature can be set using cams 1 and 11.
Turn the eye 8 and use the cam plate 19 to slide f! lJ connection board 17
The movement is performed by controlling the short side set portion 16C of the handling spring 16 by the driving plate 17a to change the degree of bending of the arcuate bent portion 16a.

4. As described above, the invention transmits the motion to the switch via the lino rod, which makes the herose and the switch face each other and moves the motion of the herose toward the support.
-1- Simplify the width of the machine while separating the base and the switch.In addition to making it possible to transmit the movement, the arc is Because it changes the shape of the curved part...
You can set the appropriate number by turning the X to the right.

Manoko In the present invention, (the r1 dynamic adjustment plate is set to the one-law force in the direction of the extension of the leaf spring) - (adjusted by the cam, so δII, which decreases during use, is the cam shaft force direction that is the adjustment side) The depth of the casing can be reduced to the size of the human body, and by making it into a flat, compact 1-shape, it is easy to see through the casing, which is the case with appliances such as refrigerators.

[Brief explanation of drawings]

FIG. 1 shows a thermostat according to the present invention.
The second part 1 is a left side view of the two, the third part 1 is a right side view, and the fourth part is a right side view.
The figure shows the internal structure of the front casing, Figure 5 is a sectional view taken along the line v-'v of Figure 2, Figure 6 is a perspective view of the main part, and Figure 7 is a perspective view of the main parts. It is a perspective view of the most spring. 8...T+ book, s...Switch 1.4...Herose, 14...Operating rod, 16...U-shaped leaf spring, 17
...Sliding adjustment plate. +1! r, :'I Applicant Washimiya Seisakusho Co., Ltd. Figure-1 Figure 6

Claims (2)

[Claims] (1) A bellows and a switch are provided in the housing to face each other, and an operating rod is provided between the bellows and the switch, and the movement of the bellows is transmitted to the switch by axial movement of the operating rod, A U-shaped leaf spring is provided in a direction intersecting the operating rod between the bellows and the inch, and one side of the leaf spring is engaged with the operating rod to apply a load against the bellows.1. Bring the driving piece of the sliding or dynamic adjustment plate into contact with the other side of the leaf spring Φ,
A thermostat characterized in that the resistance load is set by moving a sliding or dynamic adjustment plate by a cam plate, and changing the shape of the arcuate bent portion. (2) The i body, the bellows, and the switch are provided facing each other, and an actuating rod is provided between the bellows and the switch, and the movement of the actuating rod's axial movement, the liberos, and - is transmitted to the switch; A U-shaped leaf spring is provided between the bellows and the switch in a direction that intersects the operating rod, and one side of the leaf spring is engaged with the operating rod to apply an opposing load to the bellows. A sliding adjustment plate is provided on the side in the intersecting direction to move in the direction of the operating axis when the cam plate is operated, and its driving piece is brought into contact with the other side i of the U-shaped leaf spring, and when the cam plate is operated, the sliding adjustment plate is bent into an arc shape. 1. A thermostand characterized in that the resistance load shown in the above 2. and 1. is set by changing the shape of the part.