JPS6237301Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an improvement of a pull-string operation switch installed on equipment installed at a high place such as indoors, and the purpose is to enable the desired operation control to be easily selected and operated. is one of its objectives.

Generally, time switches are installed in devices installed at high places indoors, such as air conditioners, but these time switches are generally operated directly by hand on an operating shaft or operating lever.

Therefore, for example, in a wall-mounted air conditioner that is installed at a high place, it is difficult to operate the time switch if it is attached to the air conditioner itself, so it is generally attached to a remote control.

However, on the other hand, there is a desire for a pull switch type without a remote control for reasons such as the mounting location of the remote control, cost, and operability.

In addition, pull-operated switches that do not have a time switch function are also widely known, but since the switching direction is sequentially changed from one rotation direction, it is not possible to There were problems, such as requiring multiple pull string operations in some cases when obtaining operation.

Furthermore, even if a timer function is simply added to this mechanism, the rotation direction is unidirectional, so
The above problems remain unresolved.

The present invention provides an easy-to-use pull cord type operation switch that solves the above-mentioned conventional problems.

Hereinafter, the present invention will be described with reference to the accompanying drawings showing one embodiment thereof. In this embodiment, an air conditioner will be explained.

First, an electric circuit of an air conditioner using a time switch will be explained with reference to FIG.

In the figure, reference numeral 1 denotes an operation switch, which has a common terminal O connected to an insertion plug 2, and a plurality of switching contacts a, b, c, d, and e. Reference numeral 3 denotes an indoor fan motor, which has speed switching taps for high speed H, medium speed M, and low speed L, and these are connected to contacts a to c of the main switch 1, respectively. 4 is a compressor motor, one end of which is connected to contact d of the main switch 1 via a thermostat 5, and the other end connected to the plug 2. Further, a timer motor 7 is connected to the switching contact e of the operation switch 1.
A parallel circuit of a display lamp 8 and a display lamp 8 for displaying the operating status of the operation switch 1 are connected to each other.

In the circuit having the above configuration, switching contacts a to
When any one of c and switching contact d is manually turned on, the indoor fan motor 3 and compressor motor 4 rotate, respectively, and air conditioning operations such as cooling and heating are performed.

In addition to the above contacts being ON, switching contact e is also ON.
When operated, in addition to operating the indoor fan motor 3 and compressor motor 4, the timer motor 7 is also operated.

When the operating time set by the timer motor 7 has elapsed, the contacts a to c and the switching contacts d and e are turned off by the power of the timer motor 7, and the air conditioning operation is automatically stopped.

Next, the structure of the operating switch will be explained with reference to FIGS. 2 to 9. Here, the same numbers as those in FIG. 1 are given the same numbers, and the description thereof will be omitted.

In the figure, 1 is an operation switch, case 9
The connection terminals 6 and 10, the operating shaft 11, and the operating string 39 each protrude from the outside. Inside the case 9, as shown in FIG. 3, there is a timer motor (not shown), a driving gear 14 connected to the rotating shaft 13 of the timer motor, and a first gear 15 and a second gear 15 constituting a speed reduction mechanism. a gear 16; a slip spring 17 made of a plate spring material or the like that transmits the rotation of the drive gear 14 to the first gear 15 by frictional force; and the second gear 1.
The operating shaft 11 which is the output shaft of 6 and this operating shaft 11
moderation cam 18 and contact cams 19 and 2 provided in
0, 21, 22, 23, and recesses 18a, 18b, 18c, 18 of the moderation cam 18 as shown in FIG.
d and 18e to set the rotating position of the operating shaft 11 to the fixed position (in this example, "stop", "blow", "strong",
A moderation spring 24 that urges the device to be held in the "medium" or "weak" position, and a contact cam 19 as shown in FIG.
Intervening recesses 19a, 20 of 20, 21, 22, 23
Switch contacts 25, 26, 2 that open switching contacts a to e by immersion into a, 21a, 22a, 23a
7, 28, and 29 are provided, respectively. Here, the recesses 19a to 2 of each of the contact cams 19 to 23 are
3a is the length so that the operation described below can be obtained;
The location etc. are designed. 30 is the operation shaft 11
A drive cam for intermittent feeding is provided on the cam, and a plurality of locking pawls 31 are provided radially. 32, 33
are support pieces for forward rotation and reverse rotation, each of which has one end rotatably supported by the operating shaft 11, and has a biasing spring at each other end to hold the support pieces 32, 33 in place. 34 and 35 are provided. 36 and 37 are the support pieces 32 and 3, respectively.
3 is a substantially L-shaped engagement claw for forward rotation and reverse rotation that is rotatably provided, and the engagement claw 36 for forward rotation has a locking piece 38.
An operating string 39 is provided, and an actuating piece 41 is provided with a groove 40 such that the string 39 fits into the reversing engagement pawl 37 and the locking piece 38 abuts.
is provided. 42 is the support piece 32, 33
This is a stopper that restricts the rotation range of the.

As shown in FIG. 8, on the case surface of the operating switch 1 and the tip of the operating shaft 11, "stop", "blow", "strong", "medium" are displayed to indicate the operating status.
In addition to "Low", there is also a display with notches "2H" to "6H" (2 hours to 6 hours) every two hours to indicate the time-controlled operation state, and a display 43 that displays the operation selection state. ing. In other words, the operating switch 1 is designed with the speed reduction mechanism, the rotation speed of the timer motor 7, etc. so that a set time of two hours can be obtained with one pitch of the locking pawl 31. The circuit is formed so that each of the two is energized. This circuit is shown in FIG. Note that a to e in Figure 9
1 shows a circuit of switching contacts a to e in FIG. 1.

In the above configuration, the string 39 is in the state shown in FIG.
by pulling it in the direction of the arrow so that the support piece 32 touches the stopper 3.
4, the engaging claw 36 moves the locking claw 31 of the drive cam 30 downward, and the drive cam 30 eventually rotates one notch to the right (forward rotation direction) in the figure and moves to the eighth position. Rotate from "stop" to "blow" as shown in the figure. At this time, all the contact cams 19 to 23 and moderation cam 18 rotate, but each contact cam 1
Since the shapes and positions of the recesses 19a to 23a of 9 to 23 are formed arbitrarily and are arranged with deviations, only the switch contact piece 26 is disengaged from the recess 20a of the contact cam 27, and only the switching contact b is turned on. becomes. As a result, only indoor fan motor 3 is "medium"
Driven at speed. At the same time, the moderation spring 24 fits into the recess 18b from the recess 18a and maintains that position ("blow air").

Then, when the string 39 is further operated in the same manner, the drive cam 30 rotates one notch further, and the operation is switched from "air blow" to "strong" operation. At this time, all the contact cams 19 to 23 and the moderation cam 18 rotate in the same way, and the switch contacts 25 and 28 are removed from the recesses 19a and 22a of the contact cams 19 and 22, and the switching contacts a and d are turned ON. . At the same time, the above-mentioned switch contact piece 26 again fits into the recess 20a of the contact cam 20, and the switching contact b is turned OFF again. Therefore, the indoor fan motor 3 is operated at high speed, and at the same time, the compressor motor 4 is also operated, and air conditioning operation is started. At this time, the moderation cam 1 is
8, the moderation spring 24 fits from the "blow" recess 18b to the "strong" recess 18c, and maintains this state.

Thereafter, by pulling the string 39 in the same way, the operation is switched from "strong" to "medium", switching contacts b and d are turned ON, the indoor fan motor 3 is operated at medium speed, and the compressor motor 4 is also operated at the same time. Ru.

Furthermore, by operating the string 39, you can change the setting from "medium" to "weak".
At this time, the switching contacts c and d are each turned ON, and not only the compressor motor 4 is operated, but also the indoor fan motor 4 is operated at low speed.

Then, when the string 39 is further pulled in sequence, the timer operation changes to ``6H'' (6 hour operation), ``4H'' (4 hour operation), ``2H'' (2 hour operation), and ``stop''.
Rotate.

Above, we have explained the right rotation operation.
During each of these operations, the reverse rotation engaging claw 37 is constantly engaged with the locking claw 31 of the drive cam 30.
Since there is nothing biasing the drive cam 30 to prevent the rightward rotation, the forward rotation (rightward rotation) is not impeded and the forward rotation is freely followed by the rightward rotation of the drive cam 30.

Next, a case of reverse rotation (left rotation in FIG. 8) will be described.

In this case, the string 39 may be pulled in an inclined state as shown in FIG. By this operation, the engagement claw 36 for forward rotation is disengaged from the engagement claw 31 of the drive cam 30, and at the same time the engagement piece 38 is moved into the groove 4 of the actuating piece 41.
0 and the operation of the string 39 is reversed by the engaging claw 37.
transmitted to. At this time, if the locking piece 38 is configured to be guided to the groove 40 of the actuating piece 41 by a well-known guide mechanism, its operation will be ensured. Therefore, the engagement claw 37 for reverse rotation engages with the locking claw 31 of the drive cam 30, and the drive cam 30 rotates one notch to the left, changing from "stop" to "2H" as shown in FIG. Switch.

In conjunction with this operation, the moderation cam 18, contact cam 1
9 to 23 also rotate to the left in FIGS. 4 and 5.
As for the moderation cam 18, since the moderation spring 24 goes over the "stop" concave part 18a and comes into contact with a curved surface without a concave part, it is not held at an arbitrary position and is driven by the driving force of the timer motor 7. It is in a state where rotation is possible via the speed reduction mechanism.
At the same time, the other contact cams 19 to 23 also rotate, and the switch contact pieces 25, 26, 29 of the contact cams 19, 20, 23 rotate in their recesses 19a, 20a,
Each contact cam 19, 20, 2 so as to escape from 23a.
Since the size, position, etc. of the recesses 19a, 20a, and 23a of No. 3 are set, the contacts c, d, and e are ON.
Therefore, at the same time, the indoor fan motor 3 is operated at "low speed", the compressor motor 4 and the timer motor 7 are
are operated, and air conditioning operation is started. The amount of rotation of each contact cam 19, 20, 23 is adjusted so that it takes a set time (2 hours in this state) to recover.
The amount of rotation per notch is set.

When the hand is released from the string 39, the supporting piece 33 returns to its original state due to the biasing force of the spring 35, and at the same time, the locking piece 38 of the string 39 also moves to the operating piece 41.
It separates from the groove 40 and returns to its original state.

Therefore, the rotation of the timer motor 7 is applied to the first gear 15 and the second gear 1 via the slip spring 17.
6 and then to the operating shaft 11. As a result, each contact cam 19, 20, 23 rotates in the opposite direction to the direction of rotation caused by the previous operation of the means, and after the set time elapses, each switch contact piece 25, 26, 29 fits into its recess 19a, 20a, 23a. At the same time, contacts c, d, and e are turned OFF, and not only the timer motor 7 but also the indoor fan motor 3 and compressor motor 4 are turned OFF, and the air conditioning operation is stopped. At this time, the moderation cam 18 similarly rotates in the opposite direction, and the moderation spring 24 is fitted into the "stop" recess 18a again. Further, the drive cam 30 also rotates in the opposite direction and returns to its original state at the same time, but since the engaging claw 37 is rotatably supported by the support piece 33, the reverse rotation of the drive cam 30 is not hindered.

Further, in order to obtain "4H" (4 hours) operation control, in addition to the previous "2H" (2 hours) operation, the string 39 may be pulled once more in succession. That is, in addition to the previous one-notch operation, the string 39 is again
By performing the pulling operation, the operating shaft 11 moves to 2
The moderation cam 1 rotates by the notch, and along with this, the moderation cam 1
8. The contact cams 19, 20, and 23 are also rotated to the left by two notches in FIGS. 4 and 5. In this state, the node spring 24 of the node cam 18 is in contact with a curved surface without a concave portion, as in the case of “2H”, and the node cam 18 of the other contact cams 19 to 23 is in contact with the curved surface without a recess. 20, 23 switch contact piece 27~
29 has also come out of the recesses 19a, 20a, and 23a.

Therefore, as in the case of the previous "2H" operation, contacts c, d, and e are turned ON, and the indoor fan motor 3 is operated at "low speed", and at the same time,
The compressor motor 4 and the timer motor 7 are each operated, and air conditioning operation is started. Then, over the set time of 4 hours, the contact cams 19, 20, 23
returns to rotation, and contacts c, d, and e each turn OFF.
becomes. At this time, the moderation spring 24 is similarly fitted back into the "stop" recess 18a of the moderation cam 18.

Furthermore, when obtaining "6H" (six hours) operation control, the string 39 can be operated in the same manner.
For example, from the "stop" state, it is only necessary to perform the operation three times in a row.

If you pull the string 39 one more time from this "6H" state, it will switch to the normal operation control "weak" operation, and if you pull the string 39 one more time, it will switch to "medium" operation, "strong" operation, and so on. "Air blowing" operation, "stop".

Therefore, by operating the pull cord 39, it can not only be used as a normal operation switch, but also timer operation control can be performed by the same operation. Furthermore, clockwise rotation (forward rotation) and counterclockwise rotation (reverse rotation) can be selected depending on the pulling direction of the drawstring 39, and the operation switch range ("blow", "strong", "medium", "weak")
or timer operation control range (“2H”, “4H”,
6H), there is no need to pass through the area on the side that is not used, as in the case of a structure that is restricted to one rotation direction, and the desired result can be achieved with the least amount of pulling operation of the string 39. The operating conditions can be obtained, improving usability.

In this embodiment, a driving operation switch having a timer function has been described, but it is also possible to use only a timer function with a structure that reduces the number of contacts and contact cams and eliminates the moderation mechanism.
Although the moderation cam 18 and moderation spring 22 are used to securely maintain the positions of "stop", "blow", "strong", "medium", and "weak", other mechanisms such as a torge mechanism can be used as a contact point. Similar effects can be expected even if the above-mentioned two are omitted.

As is clear from the above embodiments, the pull string operation switch of the present invention allows the user to freely select clockwise rotation or counterclockwise rotation in the pulling direction of the pull string, and the desired operating state can be obtained with an extremely small number of pulling operations. This has various advantages, such as improved usability and the ability to be incorporated into equipment installed at high places, allowing for arbitrary selection of operating conditions without hindrance to usability.

[Brief explanation of the drawing]

Fig. 1 is a schematic electrical circuit diagram of an air conditioner equipped with a pull-string operation switch according to an embodiment of the present invention, and Fig. 2 is a perspective view of the same pull-string operation switch.
Figure 3 is a plan view showing the internal structure of the pull cord type operation switch, Figure 4 is a front view of the moderation cam section of the pull cord type operation switch, and Figure 5 is a contact cam section of the pull cord type operation switch. Fig. 6 is a front view showing the operating state of the drive cam section of the pull cord type operation switch when it is rotated clockwise, and Fig. 7 is a front view showing the operation state of the drive cam section of the pull cord type operation switch when it is rotated counterclockwise. A front view showing the state, FIG. 8 is a front view of the operating state display section of the pull cord type operation switch,
FIG. 9 is a diagram showing the opening/closing mode of the contact portion in the same pull-string operation switch. 7...Timer motor, 11...Operation axis, 15
...First gear, 16...Second gear, 19,20,
21, 22, 23... Contact cam, 30... Drive cam, 31... Locking claw, 36, 37... Engaging claw, 3
8... Locking piece, 39... String, 41... Actuation piece,
a, b, c, d, e... contacts.

Claims (1)

[Scope of utility model registration request] an operating shaft having contact cams respectively corresponding to the plurality of switching contacts; a drive cam attached to the operating shaft and having a plurality of radially locking claws; one end rotatably supported by the operating shaft; The end is rotatably supported by a spring-biased support piece for forward rotation and reverse rotation, and the other end of the support piece for forward rotation, one end engages with the locking pawl, and the other end locks. a substantially L-shaped forward rotation engaging pawl provided with an operation string having a piece; and a reverse rotation support piece rotatably supported at the other end of the reversal support piece, one end of which engages with the locking pawl. An engaging claw, this reversing engaging claw, and one end are integrally connected,
The other end extends below the drive cam, and further includes an actuating piece having a groove in which the locking piece abuts, and by operating the string downward, the forward rotation support piece is activated. By rotating the operating shaft in the forward rotation direction, rotating the drive cam in the forward rotation direction by the forward rotation engagement pawl, and operating the string diagonally downward, the forward rotation engagement disengaging the mating pawl from the locking pawl, bringing the locking piece into contact with the groove of the actuating piece, and rotating the reversing support piece in the reverse direction about the operating shaft;
A pull string type operation switch configured to rotate the drive cam in a reverse direction by the reverse engagement claw.