JPH034218Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Industrial Application Field The present invention relates to an operating point adjusting device such as a water level switch that changes the operating point in accordance with a desired washing water level.

(b) Conventional technology This type of water level switch is, for example,
As shown in Japanese Patent No. 40951, a pressure change due to a change in water level is applied to a diaphragm, and the moving force of the diaphragm causes a switch contact to be closed. This operating point can be adjusted by changing the strength of the spring biasing force applied to the diaphragm in advance using a rotation control knob. For example, by increasing the biasing force of the spring, it is possible to perform a detection operation at a high water level.

On the other hand, there is also a device that adjusts the operating point using a sliding operation knob, as shown in Figure 5 (front view).
and FIG. 6 (right side view). In this conventional example, one side of the water level switch 52 is fixed to the outer side surface of a frame 51 bent into a U-shape, and a mounting plate 53 is fixed to the left side of the frame 51. A guide 54 is installed in the space surrounded by 51. This guide 54 has an operating knob 56 protruding from the elongated vertical guide groove 55 of the mounting plate 53 on the left side, and an inverted U-shaped support groove 57 on the right side. The installed guide rod 58 is slidably held in support grooves 57 from the left side.
Further, a cam 59 whose height changes in three stages is provided on one side of the guide 54, and a lever 60 that elastically moves from side to side is brought into contact with this cam 59 in order to adjust the operating point of the water level switch 52. There is. On the other hand, the mounting plate 53 has a corrugated joint recess 6 at each step of the cam 59.
1... are formed in correspondence with each other, and the protrusion 62 on the left side of the guide 54 is fitted therein as appropriate.

Thus, when the operating knob 56 is slid up and down along the guide groove 55, it moves every time the protrusion 62 fits into the recess 61, and at this time, the cam 59 moves the lever 60 left and right according to the difference in level. to adjust the operating point of the water level switch 52.

In this way, the guide 54 is regulated by the guide rod 58 etc. on the front and rear, left and right sides, and moves with little wobbling, but since the guide rod 58 is located on the right side inside the frame 51, this device is installed on the right side. This requires sufficient dimensions, making it difficult to downsize. In addition, the guide rod 5
8 to the frame body 51 is also a separate operation, so the work efficiency is poor.

(c) Problems to be solved by the invention By omitting the guide rod, the invention aims to downsize the device and improve its working performance, thereby reducing costs.

(d) Means for solving the problem The present invention provides a frame body and a mounting plate that are fixed to each other with elongated guide grooves that open in opposite directions, and either one or both of the frame body and the mounting plate , an operating switch having an operating point adjustment lever is installed, a guide that slides on the inner surfaces of the frame and the mounting plate is disposed, and the guide includes an operating plate protruding from one guide groove; This problem is solved by providing a guide pin that faces into the other guide groove and a cam that operates the adjustment lever when the guide slides.

(E) Function: In other words, elongated guide grooves are provided in opposite directions on the frame body and the mounting plate, and the operating plate and guide pin are fitted into these grooves, respectively, and the guides move from opposite directions along the grooves to ensure smooth sliding. It is in a dynamic state. Therefore, since the protrusion is simply fitted into the groove, the dimensions in this direction can be shortened.

(f) Example An example will be explained with reference to Fig. 1 (side view), Fig. 2 (rear view), Fig. 3 (bottom view), and Fig. 4 (sectional view taken along line A-A' in Fig. 1). Reference numeral 1 designates a mounting plate consisting of a vertically long plate, whose rear end is bent to form a guide piece 2 in the vertical direction, and a vertically elongated guide groove 3 is bored in the plate surface. 4 is mounting plate 1
The frame body is fixed to the right side of the frame body, and the rear part thereof is opened, and a switch mounting piece 5 is bent from the rear wall to the right side, and a vertically elongated guide groove 6 is bored in the front side of the right side. Furthermore, the rear edge of this guide groove 6 is erected on the right side to form an auxiliary piece 7.

Reference numeral 8 denotes a water level switch fixed to the switch mounting piece 5. A connection port 9 for connecting a pressure hose from an air trap is provided on the right side, and a lever 10 for adjusting the operating point is provided on the left side.
0 is biased toward the left side by a spring 11. Reference numeral 12 denotes a holding plate molded in resin integrally with the main body of the water level switch 8, which overlaps the rear surface of the switch mounting piece 5 and protrudes toward the left side.
A guide hole 13 is provided in the left and right direction.

Reference numeral 14 denotes a resin guide in which the operation plate 15 is insert-molded, and is disposed in a space surrounded by the mounting plate 1 and the frame body 4, and slides vertically on the inner surfaces of both.
The operation plate 15 penetrates the guide groove 3 of the mounting plate 1 and protrudes to the left side, and the guide pin 16 protrudes toward the right side toward the front of the right side faces (fits) into the guide groove 6 and can be moved as needed. It is slidably supported by the auxiliary piece 7.

17 is a cam formed on the rear surface of the guide 14;
It is long in the vertical direction and protrudes to the right. The cam 17 is slidably supported on the inner surface of the guide piece 2 as necessary. Further, the protruding end of this cam 17 is uneven, forming three valleys 18, 19, 20 of different depths and curved peaks 21, 21 between the valleys, and a stopper 22 with a steep protruding state is formed at the upper and lower ends. , 22, and one of the valleys 18, 19, 20 accommodates the lever 10.

During assembly, the switch 8 is fixed to the switch mounting piece 5 of the frame 4, the guide 14 is housed in the frame 4, and in this state the frame 4 is fixed to the mounting plate 1.

In this way, when the knob 23 is attached to the operation plate 15 and moved up and down, the guide 14 is installed by being guided by the operation plate 15 in the guide groove 3 and the guide pin 16 in the guide groove 6 or further by the auxiliary piece 7. It slides up and down on the inner surfaces of the plate 1 and the frame 4. If the vertical dimensions of the guide pin 16 are increased, the supporting surface of the guide pin 16 becomes longer, and the sliding state can be made more stable, but the vertical stroke is shortened. Therefore, the vertical dimensions of the guide pin 16 are not set too large, and the vertically long cam 17 is widely supported by the vertically long guide piece 2 to ensure sliding stability.

The cam 17 accommodates the lever 10 in, for example, a valley 20, but as the guide 14 slides, it moves over the peak 21 and accommodates the lever 10 in another valley 19 or 18. The operating point of the switch 8 is adjusted by changing the amount of movement of the lever 10 in the left-right direction depending on the depth of the lever 10. At this time, the guide 14 is pressed by the spring 11 via the cam 17 and pressed against the right side surface (inner surface) of the mounting plate 1, thereby eliminating rattling in the left-right direction during sliding. Further, since the cam 17 moves the lever 10 over the peak and accommodates it in the valley, this operation can be made into a joint operation.

In this embodiment, the lever 10 that adjusts the operating point of the water level switch 8 is located at the valleys 18, 19, 20 of the cam 17.
The operating point of the switch is adjusted by operating the cam 17, but the operating lever of a normal switch is accommodated in the valleys 18, 19, and 20 of the cam 17 to control the ON-OFF mechanism or contact switching mechanism of the switch. You can also replace it with

(G) Effects of the invention According to the invention, since a guide groove and a guide pin are used in place of the guide rod, the dimensions required for the guide can be shortened, and the device can be made smaller and the workability improved. This makes it possible to provide a low-cost device.

[Brief explanation of the drawing]

Figure 1 is a right side view of the device of the present invention, Figure 2 is a rear view, Figure 3 is a bottom view, Figure 4 is a sectional view taken along line A-A in Figure 1, and Figure 5 is a front view of the conventional example. FIG. 6 is a right side view with a portion omitted. 1... Mounting plate, 3... Guide groove, 4... Frame,
6...Guide groove, 8...Water level switch, 10...
Lever, 14...Guide, 15...Operation board, 16
...Guide pin, 17...Cam.

Claims (1)

[Scope of utility model registration request] The frame body is fixed to the mounting plate, and both are provided with elongated guide grooves that open in opposite directions, and an operating switch having an operating point adjustment lever is attached to either or both of the frame body and the mounting plate. A guide that slides on the inner surfaces of the frame body and the mounting plate is disposed inside the frame body and the mounting plate, and this guide includes an operation plate protruding from one guide groove, a guide pin facing into the other guide groove, and the above-mentioned adjustment plate. A switch operating point adjustment device that is equipped with a cam that operates the lever when the guide slides.