JPH0935565A - Control device adjustment knob mechanism - Google Patents

Abstract

(57) [Summary] [Purpose] The knob can be incorporated by a simple one-touch insertion operation without using fastening screws, and the knob can be adjusted even when the knob is inadvertently touched during use. (EN) Provided is an adjusting knob mechanism for a control device, which is intended for a timer or the like, which is provided with a rotation preventing measure so as not to move out of position. [Structure] Between the knob 7 arranged on the front surface of the support member 2 and the relay piece 5 fitted and coupled to the operation shaft of the volume 3 and incorporated in the case, project from the knob to the rear without using a fastening screw. The connecting arm with a claw 3a is inserted into the locking hole of the relay piece and connected in a click manner, and then the relay piece is pushed down and urged by the coil spring 9. Furthermore, the knob 7 is adjusted by combining a pin-shaped projection 7b provided on the peripheral edge of the knob with a lock hole 2c arranged on the circumference of the support member so as to fit the projections and drilled in the front surface of the support member. A knob rotation prevention mechanism for locking the lock is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adjusting knob mechanism for a control device, which is intended for a time adjusting knob provided on a timer, for example.

[0002]

2. Description of the Related Art First, taking the above-mentioned timer as an example, FIGS. 3 and 4 show the assembly structure of an adjusting knob mechanism employed in a conventional timer product. In the figure, 1 is the case of the timer,
Reference numeral 2 is a support member mounted on the front surface of the case 1, and 3 is a leg piece 2a of the support member 2 mounted on the printed wiring board 4.
The time adjustment volume 5 supported by the relay piece 5 is a relay piece fitted and coupled to the rotary operation shaft 3a of the volume 3, and 6 is interposed between the relay piece 5 and the support member 2 to move the relay piece 5 downward. Waveform washer to be pressed, 7 is a knob for adjusting the volume arranged on the front side of the support member 2, and 7a is a knob 7
The pointer mark 8 displayed on the end face of the relay member 8 is a relay piece 5 protruding forward through a hole 2b opened in the front wall of the support member 2.
Is a fastening screw that connects the shaft portion of and the knob 7, and the parts of the volume 3, the printed wiring board 4, the intermediate piece 5, and the knob 7 are assembled together in a unitary manner in the support member 2. .

With such a configuration, by rotating the knob 7 from the front side of the case, the operation shaft 3a of the volume 3 is rotated and the time adjustment is performed. Further, in this case, the knob 7 is pressed against the front surface of the support member 2 by the urging force of the above-mentioned wave washer 6 to give an appropriate braking torque.

[0004]

The conventional structure of the adjusting knob mechanism described above has the following problems in terms of assembly workability and handleability during actual use.
That is, 1) Since the relay piece 5 incorporated in the case and the knob 7 arranged on the front side are coupled by using the fastening screw 8, when the knob 7 is mounted in the product assembling process. Requires time-consuming screw tightening work, which is one of the factors that reduce the efficiency of assembly work and increase the manufacturing cost.

2) Further, if the knob 7 is inadvertently touched by an object or a hand during maintenance or inspection in actual use, the knob 7 may rotate and the time limit setting of the timer may be changed. The present invention has been made in view of the above points, the first purpose of which is to allow the knob to be incorporated by a simple insertion operation without using a fastening screw, and the second object is to hold the knob during use. It is an object of the present invention to provide an adjusting knob mechanism for a control device, which is intended for a timer or the like, which is provided with a rotation preventing measure that prevents the knob from moving accidentally.

[0006]

According to the present invention, in order to achieve the above first object, a knob provided on the front side of the support member has a volume supported by the support member and incorporated in the case. As an adjusting knob mechanism for rotating operation, a relay piece fitted and coupled to the operation shaft end of the volume and connected between the relay piece and the knob incorporated on the back surface side of the support member, wherein the intermediate piece and the knob are connected to each other. ,
It is assumed that the claws are connected to each other through a click-type connecting means for inserting and inserting the claws into the holes on the other side.

The click-type connecting means in the above structure is specifically, a bifurcated claw-like connecting arm protruding into the case from the back surface of the knob through a knob mounting hole opened in the front wall of the support member, and a relay piece. An engagement hole which is opened in the flange portion and into which the tip claw of the connecting arm is inserted,
The coil spring is compressed and interposed between the support member and the flange portion of the relay piece.

Further, in order to achieve the second object, a pin-shaped projection is provided on a part of the rear surface side of the knob in the above construction, and the projection is fitted on the front wall of the support member. A large number of lock holes for locking the tongue in the adjusting position are arranged on the circumference, and the rotation preventing mechanism of the knob is constituted by these.

[0009]

In the above structure, when assembling the adjusting knob mechanism, the connecting arm of the knob is inserted from the front side through the front hole of the support member to the relay piece incorporated on the back side of the support member together with the coil spring. With a simple one-touch operation of inserting the tip claw portion into the locking hole opened in the flange portion of the relay piece and click-joining, the relay piece and the knob are integrally connected without using a fastening screw. Then, by rotating the knob in this assembled state, the adjustment operation can be performed by rotating the operation shaft of the volume connected to the relay piece.

When the knob is released after the volume is adjusted, the pin-shaped projection provided on the knob is pierced on the front surface of the support member by the urging force of the spring interposed between the support member and the relay piece. The knob is locked in the adjusted position by fitting in the locking hole. Therefore, it is possible to prevent the knob from being inadvertently rotated by the touch of the knob or the like at the time of maintenance or inspection, and prevent the adjustment position of the volume from being erroneously changed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In the drawings of the embodiments, the same members corresponding to those in FIGS. 3 and 4 are designated by the same reference numerals and the description thereof will be omitted.
That is, on the back side of the knob 7 made as a resin molded product, a claw-attached connecting arm 7a protruding in a bifurcated shape from the central portion to the back is integrally formed. On the contrary,
In addition to the half-moon shaped hole 5a into which the tip of the volume operation shaft 3a is inserted, the relay piece 5 which is fitted and coupled to the operation shaft end of the volume 3 has a disc-shaped flange portion 5b and the connecting arm of the knob 7 described above. A pair of locking holes 5c into which the tip claws of 7a are inserted are opened. Further, a coil spring 9 is provided between the back surface of the support member 2 and the flange portion 5b of the relay piece 5.
Is compressed and inserted.

Further, a pin-shaped projection 7b protruding toward the back surface is provided on a part of the peripheral edge of the knob 7, and the central hole 2 is provided on the front surface of the support member 2 so as to face the projection 7b.
A large number of lock holes 2c which are arranged on the circumference corresponding to the rotational movement locus of the projection 7b centered on b and which fit with the projection 7b are perforated, and the knob 7 is locked at the adjusting position with these lock holes. It constitutes a rotation prevention mechanism.

In order to assemble the adjusting knob mechanism having such a structure, the connecting arm 7 of the knob 7 is provided from the front side of the support member 2.
a is inserted into the knob mounting hole 2b, the relay piece 5 having the shaft portion passed through the coil spring 9 is pushed from the back surface side of the support member 2, and the connecting arm 7a of the above-mentioned connecting arm 7a is inserted into the locking hole 5c opened in the flange portion 5b. Insert the tip claw and connect it by clicking. As a result, the knob 7 and the relay piece 5 are integrally connected. Next, the operating shaft 3a of the volume 3 mounted on the printed wiring board 4 is inserted into the hole 5a of the relay piece 5, and the printed wiring board 4 is locked and fixed across the support legs 2a of the support member 2. Then, the product is assembled by mounting the assembly together with the support member 2 on the front surface of the case 1 of the control device.

On the other hand, in the above-mentioned structure, when the knob 7 is rotated while being pulled up from the front side of the case 1, the operation shaft 3a of the volume 3 is rotated via the relay piece 5 and the volume can be adjusted to a desired value. . Further, when the knob 7 is released, the knob 7 is pressed against the front surface of the support member 2 by the spring bias of the coil spring 9, and the pin-shaped projection 7b provided on the knob 7 perforates the wall surface of the support member 2. It fits into the hole 2c and is locked at the adjusted position. Therefore, in this state, the knob 7 is pulled up and the protrusion 7b
The knob 7 cannot be turned unless is removed from the lock hole 2c. As a result, it is possible to prevent a trouble in which the knob 7 is inadvertently touched by a hand or an object and the adjustment position of the volume fluctuates by mistake during maintenance or inspection performed during use.

[0015]

As described above, according to the structure of the present invention, the following effects can be obtained. 1) According to the constitutions of claims 1 and 2, when the knob is incorporated, a simple one-touch operation can be performed between the knob and the relay piece incorporated in the case without using a fastening screw that requires time-consuming screw tightening work. Since they can be combined in a click manner, the lead time of the assembly process can be shortened and the work efficiency in the assembly process can be improved.

2) Further, by adopting the rotation preventing mechanism of claim 3, the knob is prevented from being inadvertently touched by the hand or the like during maintenance or inspection, and the knob does not rotate from its adjustment position. It is possible to avoid the trouble that the volume adjustment being performed fluctuates by mistake, and improve the reliability.

[Brief description of drawings]

1A and 1B are configuration diagrams of an adjusting knob mechanism according to an embodiment of the present invention, in which FIG. 1A is a sectional view showing an assembled state, and FIG. 1B is a plan view of a support member in FIG.

FIG. 2 is an exploded perspective view of a main part structure in FIG.

FIG. 3 is a configuration diagram of a conventional adjustment knob mechanism,
(A) is a cross-sectional view showing an assembled state, (b) is a plan view

FIG. 4 is an exploded perspective view of a main part structure in FIG.

[Explanation of symbols]

 1 Case of control device 2 Support member 2b Knob mounting hole 2c Lock hole 3 Volume 5 Relay piece 5b Flange part 5c Locking hole 7 Knob 7a Claw connecting arm 7b Protrusion 9 Coil spring

Claims (3)

[Claims] 1. An adjusting knob mechanism of a control device for adjusting a volume supported by a support member and incorporated in a case by rotating a knob arranged on the front surface side of the support member,
In the case where the intermediate piece and the knob are connected to each other by fitting and connecting the intermediate piece and the knob which are fitted and connected to the end of the operation shaft of the volume and incorporated in the back surface side of the support member, An adjusting knob mechanism for a control device, characterized in that the adjusting knob mechanism is connected through a click-type connecting means which is inserted into a side hole and connected. 2. The adjusting knob mechanism according to claim 1,
The click-type coupling means has a bifurcated claw-shaped connecting arm protruding into the case from the rear surface of the knob through a knob mounting hole opened in the front wall of the support member, and a tip claw of the connecting arm opened in the flange portion of the relay piece. An adjusting knob mechanism for a control device, comprising: an engaging hole into which a connector is inserted, and a coil spring that is compressed and interposed between a support member and a flange portion of a relay piece. 3. The adjusting knob mechanism according to claim 2,
A pin-shaped protrusion is provided on a part of the rear side of the knob, and a large number of lock holes are provided on the circumference of the front wall of the support member to lock the knob to the adjusting position by fitting the protrusion. An adjusting knob mechanism for control devices, which is characterized by being arranged and perforated.