JPH0410458Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention is a lever for a mixer faucet that allows adjustment of the amount of water supplied and temperature adjustment by adjusting the mixing ratio of hot and cold water with one lever. Regarding improvements to the mounting structure.

[Prior Art] A mixing faucet that has the function of adjusting water volume and temperature with a single operation lever adjusts the water volume by rotating the lever along a vertical plane, and by rotating the lever along a horizontal plane. Generally, the temperature is adjusted by adjusting the mixing ratio of hot water and cold water. The structure of the lever attachment part of this type of faucet structure is shown in FIG. The faucet lever 10 has a boss portion 12 at its base end, which is connected to the upper end of a spindle 16 provided within a housing 14. The spindle 16 is attached to the faucet pin 1 so as to be able to swing in a vertical plane.
The spindle 16 is attached to the rotating frame 20 via the lever 8, and the connecting protrusion 22 provided at the lower end is fitted into the valve body 24, and the spindle 16 is attached to the rotating frame 20 through the lever 10.
By swinging, the valve body 24 can be moved linearly in the front-rear direction to adjust the water supply amount. Also, a rotating frame 2 that supports pins of the spindle 16
0 is connected to the valve body 24 to enable horizontal rotation transmission;
By rotating the spindle 16 around the axis by horizontal rotation of the lever 10 and transmitting the rotation to the frame 20 via the horizontal pin 18, the valve body 24 is rotated to adjust the opening ratio of the hot water channel and the cold water channel. I try to do that.

By the way, since the faucet lever 10 is configured to perform the functions of water supply amount and temperature adjustment as described above, both the lever 10 and the spindle 16 must be sufficiently fixed. In this lever mounting structure, a resin bushing 26 is placed over the tip of the spindle 16 in order to apply operating forces in multiple directions to the spindle 16.
The boss part 12 of the lever 10 is fitted from the outer periphery of the lever 10 to reduce the impact, and the fixing screw 28 is inserted from the side of the boss part 12 in order to reliably transmit the operating force.
It is screwed on to tighten it.

The outer surface of the spindle 16 and the inner surface of the boss portion 12 are polygonal surfaces that can be engaged with each other via a bush 26.

[Problems to be Solved by the Invention] However, the conventional faucet lever mounting structure has a problem in that the fixing screw 28 between the lever 10 and the spindle 16 often loosens and comes off during use. That is, as shown in FIG. 6, the fixing screw 28 is screwed into the screw hole 30 of the boss portion 12, but the screw insertion hole 32 of the bush 26 has a diameter D larger than the thread diameter _D1 , as shown in FIG. ₀ , and since the receiving hole 34 of the spindle 16 is not a screw hole, the fixing screw 28 is screwed only into the boss portion 12. Therefore, the faucet lever 10
During operation, an impact force tends to act between the bush 26 and the spindle 16, and the screws tend to loosen. In addition, it was difficult to say that the cushioning effect of the bush 26 was functioning sufficiently.

The present invention focuses on the above-mentioned conventional problems and aims to provide a faucet lever mounting structure that prevents loosening of the fixing screw that connects the faucet lever and the spindle and provides high connection rigidity.

[Means and effects for solving the problem] In order to achieve the above object, the faucet lever mounting structure according to the present invention is such that the faucet lever is attached to the tip of the valve operating spindle of the mixed faucet via a resin bushing. In a structure in which the boss part of the lever is fitted and a fixing screw is attached to the fitting part, the fixing screw insertion hole formed in the resin bushing is made approximately equal to the root diameter of the fixing screw, and the fixing screw is screwed into the lever. It has a structure that allows it to be fixed by self-tapping.

With this configuration, the fixing screw is screwed into the self-tap portion of the resin bushing together with the boss portion, and loosening thereof is reliably prevented, especially due to the increased frictional force of the self-tap portion. The bushings also come into perfect contact, significantly increasing their cushioning function.

[Example] Hereinafter, a faucet lever mounting structure according to the present invention will be described in detail with reference to the drawings. Note that the same components as those in the conventional example are given the same numbers and their explanations are omitted.

FIG. 1 is a sectional view of the main parts of a mixing faucet equipped with the mounting structure of the embodiment. The mixing faucet has a structure in which a boss portion 12 provided at the base of a faucet lever 10 made of metal or resin is fitted onto the upper end of a spindle 16 made of a metal material that transmits operating force to the valve body 24. An improved resin bushing 40 is installed between the boss portion 12 and the spindle 16. As shown in FIG. 2, this bush 40 has a cap structure with a lid and no bottom, and is placed over the upper end of the spindle 16. The hole diameter D of the screw insertion hole 42 is the root diameter of the fixing screw 44. The size is set to be approximately equal to D ₂ . In addition, the fixing screw 44
has the same outer diameter as the conventional one (for example, M5), but a conical protrusion 46 is formed at the tip of the screw. Note that the resin bushing 4
0 is an uneven cross section in which the wall surface forming the insertion hole 42 is thickened, and the thick portion has a thickness of about 3 pitches of the screw 44. Further, the outer surface of the spindle 16 and the inner surface of the boss portion 12 are polygonal surfaces that can be engaged with each other via a bush 40.

To assemble these, first, attach the resin bush 40 to the spindle 16, and insert the boss part 12 of the faucet lever 10 from the outer periphery into the receiving hole 3 of the spindle 16.
4. Insertion hole 42 of bush 40 and boss portion 12
The screw holes 30 are aligned and fitted, and the screw 44 is screwed. The screw 44 is screwed into the threaded hole 30 of the boss portion 12, but since the insertion hole 42 of the resin bushing 40 is equal to the screw root diameter _D2 , the screw 44 is self-tapped into the insertion hole 42 as it screws. Then, the tip of the screw 44 is connected to the receiving hole 3 of the spindle 16.
4 and the assembly is completed.

According to this configuration, the resin bushing 40 is provided with an insertion hole 42 that is equal to the root diameter of the screw 44 that fixes the faucet lever 10 and the spindle 16, and the bushing 40 is made to self-tap at the same time as the screw 44 is tightened. Therefore, as shown in FIG. 3, the self-tap portion 48 of the bush 40 is in close contact with the thread, and the frictional force is increased to ensure that the screw 44 is prevented from loosening. Further, since the screw 44 is provided with a slightly sharp truncated conical tip projection 46, it is easy to thread the screw 44 when tapping, thereby increasing the ease of assembly work.

Furthermore, in this embodiment, the resin bushing 40 is in close contact with the inner surface of the boss portion 12, so that the bushing 40 does not lift up, effectively exerting its buffering function, and has a structure in which rattling due to dimensional errors is unlikely to occur. There is an advantage that

Note that the receiving hole 34 of the spindle 16 may be a through hole, and a structure may be adopted in which the bush 40 and the boss portion 12 are also screwed to the opposite surfaces to increase the coupling rigidity.

[Effects of the invention] As described above, in the present invention, the resin bushing interposed between the boss part of the faucet lever and the spindle is self-tapped when tightening the fixing screw, so that it is fixed by the frictional force of the self-tapping part. The ability to prevent screws from loosening can be greatly improved, and a faucet lever mounting structure with a simple structure and high joint rigidity can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the main part of an embodiment of the present invention, FIGS. 2A and B are sectional views of the fixing screw and resin bushing adopted in the embodiment, and FIG. 3 is an enlarged sectional view of the mounting part of the embodiment. Figure 4 is a sectional view of the main part of the conventional example, Figure 5 A and B
6 is a sectional view of a fixing screw and a resin bushing in a conventional example, and FIG. 6 is an enlarged sectional view of a mounting portion in a conventional example. 10...Faucet lever, 12...Boss part, 16...
...Spindle, 40...Resin bushing, 42...
Insertion hole, 44... fixing screw, 48... self-tap part.

Claims (1)

[Scope of utility model registration request] In a faucet lever mounting structure in which a boss part of a faucet lever is fitted to the tip of a valve operating spindle of a mixed faucet via a resin bushing, and a fixing screw is attached to the fitting part, A faucet lever mounting structure characterized in that the fixing screw insertion hole is made approximately equal to the root diameter of the fixing screw, and the fixing screw is self-tapped and fixed by screwing.