JP3988850B2 - Thermostat operating temperature adjustment mechanism - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a thermostat operating temperature adjustment mechanism applied to, for example, a device that automatically opens a ventilation opening or a window according to room temperature in a greenhouse, a greenhouse, or a general building, and in particular, controls the operating temperature of the thermostat. The present invention relates to a technique that enables simple and highly accurate setting.
[0002]
[Prior art]
Various techniques have been proposed in which a thermostat that senses the temperature of air is used, and when the set temperature is reached, a window is opened to control the room temperature. For example, utility model registration No. 2509035 uses a thermostat (temperature-sensitive actuator) with a rod that extends as the temperature rises, and when the rod of this thermostat extends, the vent opening opens by pushing the lid that closes the ventilation opening. It is what I did. In this case, an adjustment screw is screwed onto the lid so as to abut against the tip of the rod of the thermostat, and the interval between the adjustment screw and the rod is an adjustment margin for the operating temperature. According to this operating temperature adjustment mechanism, when the adjustment screw is screwed toward the rod, the adjustment margin is shortened, and the rod that extends as the temperature rises quickly hits the adjustment screw, so that the lid is opened at a relatively low temperature. On the other hand, when the adjusting screw is moved backward with respect to the rod, the adjustment allowance becomes longer, and the rod hits the adjusting screw at a relatively high temperature stage, and the lid portion is opened therefrom. Thus, the operating temperature of the thermostat is adjusted by rotating the adjusting screw.
[0003]
[Problems to be solved by the invention]
However, in the above-described conventional operating temperature adjustment mechanism, the adjustment screw is rotated many times in order to advance and retract the adjustment screw at the maximum stroke, but the adjustment screw is rotated many times, and thus has the following problems. . That is, even when the set temperature is slightly changed, the adjustment screw is forced to be increased or rotated several times accordingly, which is troublesome and inefficient. This problem is particularly noticeable when the adjustment screw is extended or retracted for the maximum stroke. Further, since the set temperature cannot be determined by a single rotation angle of the adjusting screw, it is difficult to take a means for easily confirming the set temperature, for example, by placing a scale on the dial for operating the adjusting screw. The set temperature can be determined by using the screwing amount of the adjusting screw as an index, but the stroke of the adjusting screw is extremely short compared to the rotational distance of the dial, and the accuracy is low.
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a thermostat operating temperature adjusting mechanism capable of easily and accurately setting the thermostat operating temperature.
[0004]
[Means for Solving the Problems]
The thermostat operating temperature adjusting mechanism of the present invention includes a thermostat that is fixed to a support and includes a rod that extends in the axial direction in response to a rise in environmental temperature, and the support that is parallel to the extending direction of the thermostat rod. An adjustment shaft that is rotatably supported in a state, and a cam surface that is coaxially mounted on the adjustment shaft so as not to be relatively rotatable and movable in the axial direction, and has a helical shape around the shaft ,And Abuts the actuated member and activates the actuated member by moving in the axial direction. A cylindrical cam body, a cam body urging member that urges the cam body along the adjustment axis in the rod reduction direction, and a thermostat that moves together with the rod when the rod is extended, A driving member that contacts the cam surface through an adjustment margin that is an interval with the cam surface of the cam body, and further moves the cam body along the adjustment shaft. The adjustment allowance is varied from the minimum to the maximum.
[0005]
The basic operation of the thermostat operating temperature adjusting mechanism of the present invention having the above-described configuration will be described. First, the state where the drive member and the cam surface of the cam body are separated with an adjustment allowance is the normal state. From this normal state, when the environmental temperature rises and the thermostat rod extends, the drive member comes into contact with the cam surface after adjustment, and when the temperature rises further from here and the rod extends, the cam body pushes against the drive member. Then, the rod moves along the adjustment axis in the rod extending direction. Further, when the environmental temperature falls from this state and the rod of the thermostat shrinks, the cam body is returned to the original position by the cam body urging member. The advance with the rod of the cam body means the operation of the thermostat in the present invention. The cam body is used as an operator for opening a ventilation port or a window, for example.
[0006]
In the thermostat operating temperature adjusting mechanism of the present invention, the operating temperature of the thermostat is adjusted by rotating the adjusting shaft. When the adjustment shaft is rotated about the axis, the cam body also rotates integrally therewith, and during the rotation, the adjustment margin that is the distance between the cam surface and the drive member gradually changes, that is, approaches or moves away. Therefore, if the adjustment shaft is rotated in the direction in which the cam surface approaches the drive member, the drive member comes into contact with the cam surface quickly, and the thermostat operates at a relatively low temperature. On the other hand, if the adjustment shaft is rotated in a direction in which the cam surface moves away from the drive member, the adjustment allowance becomes longer, and the thermostat operates at a relatively high temperature stage. Here, since the adjustment allowance is configured to vary from the minimum to the maximum while the cam body rotates at most once, the adjustment of the operating temperature is performed over the entire range in the range of one rotation of the adjustment shaft. Therefore, the operating temperature of the thermostat can be easily set without requiring the trouble of rotating the adjusting screw many times as in the prior art. Further, since the entire operating temperature is covered within the range of one rotation of the adjusting shaft, the operating temperature can be set with high accuracy.
[0007]
In the present invention, the outer peripheral surface of the cam body has two outer diameters, a small diameter portion and a large diameter portion, and a transition portion from the small diameter portion to the large diameter portion is formed on a slope that gradually increases in diameter. The actuated member abuts on either the small diameter portion or the large diameter portion of the cam body, and operates to reciprocate in the forward / backward two positions as the cam body reciprocates. This is the preferred form. According to this aspect, the actuated member that is movable in a direction substantially orthogonal to the moving direction of the cam body and is always urged to come into contact with the outer peripheral surface of the cam body is provided. It can be operated as the body advances and retreats. Specific examples of the actuated member include, for example, an operating rod for removing a lock pin that locks a window, a lever of a micro switch for opening and closing a window, and the like. like this Actuated member Is mainly in contact with either the small diameter part or the large diameter part of the cam body (the cam body will be in sliding contact during movement) Actuated member Operates so as to reciprocate back and forth between two positions as the cam body reciprocates. For example, under normal conditions Actuated member Is in contact with the small diameter part, and when the cam body moves as the temperature rises, Actuated member As the large diameter part slides through the transition part Actuated member It is possible to adopt an operation mode in which, for example, advancing and returning to the original temperature when the temperature is lowered. in this case, Actuated member The temperature at the time when the abuts against the large diameter portion becomes the operating temperature of the thermostat. In addition, the transition part from the small diameter part to the large diameter part of the cam body is formed on the slope instead of the step where the diameter suddenly changes. Actuated member By sliding the cam body Actuated member Can be reciprocated and smoothly performed.
[0008]
The cam surface of the cam body according to the present invention is opposed to the drive member that moves with the rod of the thermostat. When the cam body rotates, an adjustment margin that is an interval between the cam member and the drive member according to the cam shape. Fluctuates. The shape of the cam surface is a slope cam formed in a spiral shape around the axis of the cam body, and is a gently continuous surface or a stepped step surface.
[0009]
In the present invention, an operation dial is provided at the end of the adjustment shaft, a temperature scale corresponding to the rotation angle of the dial is attached to the support side, and the dial is rotated using the temperature scale as an index to control the operating temperature of the thermostat. It is preferable to adopt a configuration for setting. In this case, the temperature scale is data obtained in advance from the relationship between the position of the drive member that moves according to the temperature and the fluctuation distance of the adjustment allowance (interval from the cam surface of the cam body to the drive member) according to the rotation angle of the cam body. It is determined based on.
[0010]
In addition, it is preferable that the adjustment shaft can be rotated when an operation force of a certain level or more is applied, because a risk that the set temperature may be changed unintentionally is changed. As a means for that, for example, a configuration in which an elastic part such as a spring or rubber is interposed between the adjustment shaft and the support body in a compressed state, and resistance is generated when the adjustment shaft is rotated. . In addition, when a dial is provided as described above, the same elastic parts can be incorporated into the dial, and a click mechanism that can prevent unnecessary rotation and add moderation to the dial operation feeling. May be provided.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
Reference numeral 1 in FIGS. 1 and 2 is a window opening device including a thermostat operating temperature adjusting mechanism according to an embodiment. The apparatus 1 is fixed to the window frame 2 so that the window W is automatically opened when the room temperature reaches the set temperature. The lower end edge of the window W is assembled to the window frame 2 via the hinge 3, and as shown in FIG. 2A, the upper end side is a rotation end and the outdoor side (the back side of the drawing in FIG. 1, FIG. 2). Open by tilting to the left. The window W is always urged in the opening direction by the urging member, and is stopped at the opening position shown in FIG. 2A by a stopper (both not shown). A lock pin 4 protruding upward is provided via a bracket 5 at the center of the upper edge of the window W and on the indoor side. The lock pin 4 is movable up and down along its own axial direction, and is always biased so as to protrude upward by a spring (not shown). As shown in FIGS. When the lock pin 4 is inserted into the through hole of the metal fitting 6 fixed to the frame 2, the closed state of the window W is maintained, that is, locked. When the open window W is closed, the lock pin 4 hits the metal fitting 6 and is pushed. When the lock pin 4 reaches the through hole, the lock pin 4 protrudes and fits into the through hole, and the window closing is completed.
[0012]
3 and 4 show the appearance of the window opening device 1. In these drawings, reference numeral 10 is a rectangular parallelepiped casing (support), 20 is a thermostat, 30 is an adjusting shaft, 40 is a dial for setting an operating temperature, Reference numeral 50 denotes an operating rod. As shown in these drawings, the casing 10 is configured by screwing a lid 12 to a casing body 11. The window opening device 1 is fixed to the window frame 2 by screwing left and right fixing plates 13 formed on the casing body 11 to the window frame 2.
[0013]
FIG. 5 is a front view of the casing 10 with the lid 12 removed. The thermostat 20 is formed in a cylindrical shape as a whole, and includes a temperature sensing part 21 for sensing the temperature in the room, a cylinder part 22, and a flange part 23 therebetween. A liquid temperature sensitive substance that expands / contracts in response to temperature increase / decrease is enclosed in the temperature sensing portion 21. As shown in FIG. 6, the flange portion 23 is fitted into a concave portion 11 a formed in the casing body 11, and the concave portion similarly formed in the lid body 12 is fitted to be supported by the casing 10. Yes. In this supported state, the thermostat 20 is horizontal in the axial direction (parallel to the upper and lower plates 11A and 11B of the casing body 11), the temperature sensing part 21 projects outside the casing 10, and the cylinder part 22 is inside the casing 10. It is stored in.
[0014]
As shown in FIGS. 7B and 7C, the cylinder portion 22 has a built-in rod 24 that protrudes to the left in the drawing in accordance with the expansion of the temperature sensitive substance in the temperature sensitive portion 21. Further, a bottomed cylindrical sleeve 25 is slidably mounted on the cylinder portion 22. As shown in FIG. 6, a protrusion 25 a extending along the axial direction is formed on the outer peripheral surface of the sleeve 25 facing the casing body 11, and the protrusion 25 a is formed on the casing body 11. The guide groove 11d is fitted. Thereby, the rotation of the sleeve 25 around the axis is restricted. The sleeve 25 is biased in the direction of the temperature sensing portion 21 (rightward in FIG. 5) by a compression spring 26 interposed between the flange portion 25b formed on the outer peripheral surface and the casing body 11, and is usually The bottom is in contact with the tip of the cylinder portion 22. Further, a bar-like engagement pin (drive member) 27 extending downward is integrally formed in the vicinity of the opening end on the outer peripheral surface of the sleeve 25.
[0015]
According to the thermostat 20 having the above configuration, the rod 24 is usually accommodated in the cylinder portion 22 as shown in FIG. And when the room temperature rises and reaches a certain temperature, the temperature sensitive substance in the temperature sensitive part 21 expands. With this increase in internal pressure, the rod 24 protrudes from the cylinder portion 22 while pushing the sleeve 25 against the urging force of the compression spring 26 as shown in FIGS. When the room temperature drops from this state, the internal pressure of the temperature sensing portion 21 decreases, the rod 24 is retracted through the sleeve 25 by the compression 26 spring, and further, the rod 24 is accommodated in the cylinder portion 22. Thus, the rod 24 expands and contracts according to the temperature increase / decrease at room temperature. Then, the sleeve 25 and the engagement pin 27 move integrally with the expansion and contraction of the rod 24. FIG. 8 shows an example of the stroke amount of the rod 24 extending according to the room temperature. In this case, the rod 24 extends at 30 ° C., 35 ° C., and 40 ° C. as shown in the figure. FIG. 9 shows the amount of elongation of the rod 24 as the temperature rises.
[0016]
The adjustment shaft 30 is disposed below the thermostat 20 in parallel with the expansion / contraction direction of the rod 24. The adjustment shaft 30 has a D-shaped cross section as shown in FIG. 4B, and the left and right end portions pass through the side plate portions 11C and 11D of the casing main body 11 and are about the axis with respect to the casing main body 11. It is supported so as to be freely rotatable and to move in the axial direction. Further, as shown in FIG. 7A, the left end portion of the adjustment shaft 30 in the drawing protrudes out of the casing body 11 by a predetermined length, and the dial for rotating the adjustment shaft 30 is provided at the protruding end. 40 is attached.
[0017]
A cylindrical cam body 60 shown in FIG. 10 is coaxially covered on the adjustment shaft 30. As shown in FIGS. 10A and 10C, the hole 60a into which the adjustment shaft 30 of the cam body 60 is inserted has a D-shape into which the adjustment shaft 30 is fitted, whereby the cam body 60 is adjusted. The shaft 30 cannot rotate relative to the shaft 30 and can slide in the axial direction. The cam body 60 has a shaft portion 61, and a small diameter portion 62 and a large diameter portion 63 are formed coaxially with respect to the shaft portion 61 from the left side at the left end portion of the shaft portion 61. And the transition part 64 from the small diameter part 62 to the large diameter part 63 is formed in the slope which expands gradually. Further, as shown in FIG. 5, the cam body 60 is a compression spring (with a cam body) interposed between the end portion on the small diameter portion 62 side and the casing body 11 while being wound around the adjustment shaft 30. The biasing member 65 is biased rightward in FIG. Due to the urging force of the compression spring 65, the right end of the shaft portion 61 is normally in contact with the casing body 11.
[0018]
As shown in FIGS. 10 and 11, a cam surface 63a is formed on the right end surface of the large-diameter portion 63 of the cam body 60 in these drawings. The cam surface 63a is a slope cam formed in a spiral shape around the axis of the cam body 60. In this case, when viewed from the dial 40 side, the cam surface 63a protrudes while continuing smoothly in the clockwise direction. Yes. The cam surface 63a faces the engagement pin 27. When the cam body 60 rotates, an adjustment margin (a distance indicated by L in FIG. 7A) that is the distance between the cam surface 63a and the engagement pin 27 is obtained. ) Will fluctuate. In this case, when the cam body 60 rotates counterclockwise as viewed from the dial 40 side, the cam surface 63a approaches the engaging pin 27, and when it rotates clockwise, it moves away from the engaging pin 27. Incidentally, FIG. 11 shows a state in which the cam surface 63a is furthest away from the engagement pin 27. The circumferential formation range of the cam surface 63a, that is, the effective working angle is about 200 ° as shown in FIG. 10C, and the adjustment margin L varies from the minimum to the maximum at this rotation angle.
[0019]
The cam body 60 operates as follows. When the room temperature rises and the rod 24 of the thermostat 20 extends, and when the sleeve 25 moves in the direction in which the rod 24 extends, the engagement pin 27 comes into contact with the cam surface 63a through the adjustment margin L. When the temperature of the rod 24 further extends from this point, the cam body 60 is pushed by the engagement pin 27 and moves in the same direction as the rod 24 along the adjustment shaft 30 against the compression spring 65. When the room temperature drops, the engagement pin 27 retracts as the rod 24 of the thermostat contracts, and returns to its original position with an adjustment margin L. The cam body 60 is pushed by the compression spring 65, retreats following the rod 24, and returns to the original position.
[0020]
FIG. 12 shows the mounting structure of the dial 40. In the figure, reference numeral 41 denotes an annular spring seat, and the spring seat 41 is fitted into the side wall portion 11C of the casing body 11 with the adjustment shaft 30 passed through the hole. A plurality of recesses 42 are formed inside the dial 40, and a spring 43 and a friction piece 44 are inserted into the recess 42, and then the elastic piece 40 a on the periphery of the dial 40 is engaged with the spring seat 41. The dial 40 is rotatably attached to the spring seat 41. The dial 40 is fixed to the end of the adjustment shaft 30 with a screw 45. The spring 43 is in a compressed state and always presses the friction piece 44 against the spring seat 41. As a result, when the dial 40 is rotated, a sense of resistance corresponding to the resilience of the spring 43 is generated, and inadvertent rotation of the dial 40, and thus the adjusting shaft 30 and the cam body 60 is prevented.
[0021]
The operating rod 50 is disposed below the cam body 60 as shown in FIG. The operating rod 50 is pierced through a partition frame 11E formed continuously from the lower plate portion 11B and the lower plate portion 11B of the casing body 11 so as to be movable in a direction perpendicular to the adjustment shaft 30. The operating rod 50 is formed with a flange portion 51 existing in the partition frame 11E, and a compression spring 52 is interposed between the flange portion 51 and the lower plate portion 11B. The operating rod 50 is urged upward by the compression spring 52, and its upper end is always in contact with the outer peripheral surface of the cam body 60. As shown in FIG. 5, the actuating rod 50 is normally in contact with the small diameter portion 62 of the cam body 60. When the cam body 60 moves with the extension of the rod 24 of the thermostat 20, the cam body 60 passes through the transition portion 64, and the large diameter portion 63 comes into sliding contact with the operating rod 50. By this operation, as shown in FIG. 7C, the large-diameter portion 63 pushes the operating rod 50 downward against the compression spring 52 and advances the operating rod 50. When the cam body 60 is retracted to the original position, the operating rod 50 is urged by the compression spring 52 and retracts, and returns to the original position where it abuts on the small diameter portion 62. In this way, the operating rod 50 operates to reciprocate between the forward and backward two positions as the cam body 60 reciprocates. In the present embodiment, the temperature at the time when the operating rod 50 abuts on the large diameter portion 63 and advances is the operating temperature of the thermostat 20.
[0022]
This operating temperature is adjusted by rotating the cam body 60 via the adjustment shaft 30 by the dial 40 and changing the distance of the adjustment allowance L. As shown in FIG. 4, a temperature scale 46 is attached around the dial 40 in the side plate portion 11 </ b> C of the casing main body 11, and the operating temperature is adjusted by matching the indicator 40 b of the dial 40 to the display temperature of the temperature scale 46. Is set. The temperature scale 46 is determined based on data obtained in advance from the relationship between the position of the engagement pin 27 that moves according to the temperature and the variation distance of the adjustment allowance L associated with the rotation angle of the cam body 60.
[0023]
As described above, the operating temperature adjusting mechanism of the thermostat of the present embodiment provided in the window opening device 1 is a mechanism that advances and retracts as the adjustment shaft 30 rotated by the dial 40 and the rod 24 of the thermostat 20 extend and retract. The coupling pin 27, the cam body 60 that is moved along the adjustment shaft 30 by the engagement pin 27, and the operating rod 50 that is advanced and retracted by the movement of the cam body 60 are mainly configured. As shown in FIGS. 1 and 2, the window opening device 1 is fixed to the window frame 2 so that when the operating rod 50 advances, the window opening device 1 is inserted into the through hole of the metal fitting 6 and pushed out of the through hole by pressing the lock pin 4. The
[0024]
Next, the operation of the window opening device 1 will be described.
First, as shown in FIG. 7A, the normal state is a state in which the engagement pin 27 and the cam surface 63a of the cam body 60 are separated by an adjustment margin L. When the room temperature rises from this normal state and the rod 24 of the thermostat 20 extends, the sleeve 25 is pushed as shown in FIG. 7B, and the engagement pin 27 comes into contact with the cam surface 63a through the adjustment margin L. . When the temperature is further increased from this point and the rod 24 is extended, the cam body 60 is pushed by the engagement pin 27 and moves in the extending direction of the rod 24 along the adjustment shaft 30 as shown in FIG. During the movement of the cam body 60, the cam body 60 passes through the transition portion 64, and the large diameter portion 63 comes into sliding contact with the operating rod 50. As shown in FIG. 7C, the large diameter portion 63 is compressed. The operating rod 50 is pushed downward against the spring 52 to advance the operating rod 50. When the operating rod 50 advances, the operating rod 50 is fitted into the through hole of the metal fitting 6 and pushes the lock pin 4 as shown in FIG. As a result, the lock pin 4 is detached from the metal fitting 6 and the window W biased in the opening direction is opened.
[0025]
Next, when the room temperature drops, the engagement pin 27 retracts as the rod 24 of the thermostat 20 contracts, and returns to the original position with an adjustment margin L. The cam body 60 is pushed by the compression spring 65 and retreats following the rod 24, and the operation rod 50 is retreated by being urged by the compression spring 52, and returns to the original position where it abuts on the small diameter portion 62. In this manner, the window W can be manually closed with the operating rod 50 returned to the normal position.
[0026]
The operating temperature of the thermostat 20 is adjusted by rotating the dial 40 to rotate the cam body 60 via the adjusting shaft 30 and changing the distance of the adjustment margin L. In this case, when the dial 40 is turned counterclockwise, the adjustment margin L is shortened, so that the engagement pin 27 comes into contact with the cam surface 63a quickly, and the operating rod 50 advances at a relatively low temperature. Further, when the dial 40 is turned clockwise, the adjustment allowance L becomes longer, so that the operating rod 50 advances at a relatively high temperature stage. As described above, by adjusting the pointer 40b of the dial 40 to the temperature of the temperature scale 46, the advance temperature of the operating rod 50, that is, the operating temperature of the thermostat 20 can be set.
[0027]
According to the thermostat operating temperature adjusting mechanism according to the present embodiment, the effective operating angle of the cam surface 63a for changing the distance of the adjustment margin L is about 200 °, and the adjustment margin L varies from the minimum to the maximum at this rotation angle. . That is, the operating temperature can be adjusted over the entire range within a range in which the dial 40 is rotated once. Therefore, the operating temperature of the thermostat 20 can be easily set, and the operating temperature can be set with high accuracy. Further, since the transition portion 64 from the small diameter portion 62 to the large diameter portion 63 of the cam body 60 is formed on the slope instead of the step where the diameter suddenly changes, the operating rod 50 is brought into sliding contact with the transition portion 64. The reciprocating operation of the operating rod 50 accompanying the movement of the cam body 60 is performed smoothly. In addition, the operating rod 50 reciprocates mainly in the forward / backward two positions corresponding to the small diameter portion 62 and the large diameter portion 63 of the cam body 60, and in each position, it does not move and is held at a fixed position. Even if the cam body 60 moves after the temperature is further increased after reaching the set temperature, the operating rod 50 remains in the position. Therefore, there is no problem that the operation rod 50 is damaged or deformed due to an unnecessary load.
[0028]
FIG. 13 shows a window opening device 1 </ b> B according to another embodiment in which a cam body 70 having a changed cam surface shape is incorporated instead of the cam body 60. As shown in FIGS. 14 and 15, the cam surface of this embodiment has cam surfaces 71 a, 71 b, 71 c formed in three steps in order from the side far from the engagement pin 27. Thereby, the adjustment allowance which is a space | interval with the engaging pin 27 is adjusted in three steps according to rotation of the dial 40B, Therefore, operating temperature is limited to three types. On the other hand, as shown in FIG. 16, the dial 40B incorporates a click ball 72 urged so as to always come into contact with the spring seat 41B by a compression spring 43B. On the other hand, the spring seat 41B is formed with three recesses 73 (only one is seen in FIG. 16) corresponding to the three stages of cam surfaces 71a, 71b, 71c.
[0029]
According to this embodiment, in a state where the click ball 72 has fallen into the concave portion 73 located on the rightmost side in the rotational direction of the dial 40, the cam surface 71a farthest from the engagement pin 27 is engaged as shown in FIG. Opposite to the mating pin 27. When the dial 40B is rotated counterclockwise from this state, the click ball 72 falls into the next recess 73, the cam surface 71b faces the engaging pin 27, and when the dial 40B is further rotated counterclockwise, the click ball 72 is moved to the next recess. The cam surface 71 c falls to 73 and faces the engagement pin 27. In this way, the adjustment allowance, which is the distance between the cam body 70 and the engagement pin 27, is adjusted in three stages. For example, the set temperature can be switched in three stages of 30 ° C., 35 ° C., and 40 ° C. According to the mounting structure of the dial 40B of the present embodiment, a moderation for positioning the dial 40B in any of the three stages can be added, and inadvertent rotation of the dial 40B is prevented. Further, the click sound and feel of the click ball 72 give a comfortable operation feeling to the operator.
[0030]
In addition, this invention is not limited to the said embodiment, Various forms can be taken. For example, the compression spring 26 incorporated in the thermostat 20 may be omitted, and the sleeve 25 and the engagement pin 27 may be retracted via the cam body 60 by the compression spring 65 that retracts the cam body 60. Further, instead of the compression spring 65, a compression spring having the same action can be incorporated in the cam body 60.
[0031]
【The invention's effect】
As described above, the present invention is characterized in that the adjustment amount of the thermostat operating temperature is changed from the minimum to the maximum while the cam body rotates at most once, so that the operating temperature of the thermostat can be easily adjusted. And can be set with high accuracy.
[Brief description of the drawings]
FIG. 1 is a front view showing an installation example of a window opening device provided with a thermostat operating temperature adjustment mechanism according to an embodiment of the present invention.
FIGS. 2A and 2B are side views of the thermostat operating temperature adjusting mechanism operating to open the window, and FIG. 2B illustrating the window closed.
FIG. 3 is a front view showing an appearance of a window opening device provided with a thermostat operating temperature adjustment mechanism according to an embodiment of the present invention.
4A is a left side view of the window opening device, and FIG. 4B is a right side view thereof.
FIG. 5 is a front view showing an operating temperature adjusting mechanism of a thermostat according to an embodiment of the present invention inside the window opening device.
6 is a view taken in the direction of arrows VI-VI in FIG. 5;
FIG. 7 is a front cross-sectional view showing the operation of the thermostat operating temperature adjustment mechanism according to one embodiment of the present invention in the order of (a), (b), and (c).
FIG. 8 is a front view showing a state in which the rod of the thermostat according to the embodiment of the present invention is extended in the order of (a), (b), and (c).
FIG. 9 is a diagram showing the amount of elongation of the rod as the temperature rises.
10A is a left end view of a cam body according to an embodiment of the present invention, FIG. 10B is a side view, and FIG. 10C is a right end view.
FIG. 11 is a side view showing a state where the cam body is rotated clockwise from the state of FIG. 10 (b).
FIG. 12 is a side sectional view showing a dial mounting structure according to an embodiment of the present invention.
FIG. 13 is a front view showing the inside of a window opening device including a thermostat operating temperature adjusting mechanism according to another embodiment of the present invention.
14A is a left end view of a cam body according to another embodiment of the present invention, FIG. 14B is a side view thereof, and FIG. 14C is a right end view thereof.
15 is a side view showing a state where the cam body is rotated clockwise from the state of FIG. 14 (b).
FIG. 16 is a side sectional view showing a dial mounting structure according to another embodiment of the present invention.
[Explanation of symbols]
10 ... casing (support), 20 ... thermostat, 24 ... rod,
27 ... engaging pin (drive member), 30 ... adjusting shaft, 60 ... cam body, 62 ... small diameter part,
63 ... Large diameter part, 63a ... Cam surface, 64 ... Transition part,
65: compression spring (cam body urging member), L: adjustment allowance.

Claims (2)

A thermostat having a rod fixed to the support and extending in the axial direction in response to an increase in environmental temperature;
An adjustment shaft rotatably supported on the support in a state parallel to the extending direction of the rod;
The adjustment shaft is coaxially mounted so as not to be relatively rotatable and movable in the axial direction, has a cam surface formed in a spiral shape around the axis, and abuts the actuated member in the axial direction. A cylindrical cam body for operating the operated member by movement of
A cam body urging member that urges the cam body along the adjusting shaft in the reduction direction of the rod;
The thermostat is provided so as to move together with the rod when the rod is extended. At the time of movement, the thermostat comes into contact with the cam surface through an adjustment margin which is an interval with the cam surface of the cam body, and the cam body is moved along the adjustment axis. A drive member that is moved
A thermostat operating temperature adjustment mechanism, wherein the adjustment margin is varied from the minimum to the maximum during one rotation of the cam body at most. The outer peripheral surface of the cam body has two outer diameters, a small diameter portion and a large diameter portion, and a transition portion from the small diameter portion to the large diameter portion is formed on a slope that gradually increases in diameter ,
2. The operated member according to claim 1, wherein the actuated member abuts on either the small diameter portion or the large diameter portion of the cam body and operates to reciprocate in the forward and backward two positions as the cam body reciprocates. The thermostat operating temperature adjusting mechanism described.

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