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Operating lever system

A technology of operating levers and cam grooves, applied in the field of operating lever systems, which can solve the problems of increased cost and increased number of assembly steps

Inactive Publication Date: 2007-06-27
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the conventional system, since a package or a special function part is provided to deal with noise, it causes an increase in the number of parts and the number of assembly steps or an increase in cost

Method used

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Examples

Experimental program
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Effect test

no. 1 example

[0025] First, a first embodiment of the present invention will be described. FIG. 1 is a plan view of a first embodiment of the system of the present invention, and FIG. 2 is a cross-sectional view along line AA of FIG. 1 . The first embodiment of the present invention comprises a drive rod 1 and a driven rod 2 made of a plastic having superior mechanical strength and wear resistance, such as polyacetal or polypropylene.

[0026] The driving rod 1 is formed at one end with a shaft hole 10 into which a shaft of an unshown servo motor is inserted, and at the same time, the driving rod 1 is driven by the servo motor and rotates around the shaft hole 10 . In FIG. 1 , the other end of the drive rod 1 is formed with a base 12 provided with a cylindrical pin 11 at the bottom.

[0027] The follower lever 2 is rotatable about a fulcrum 20 at one end. In FIG. 1 , the cam groove 21 is formed from the left side toward the fulcrum side. Also, the pin 11 of the drive lever 1 is slidably ...

no. 2 example

[0036] Next, a second embodiment of the present invention will be described based on FIG. 3 . FIG. 3 is a view corresponding to FIG. 2 of a second embodiment of the present invention. The same reference numerals as in the first embodiment denote elements having the same functions as in the first embodiment, and explanations are omitted. In the first embodiment, the shaft diameter of the pin 11 is the same, and the side wall of the cam groove has a two-step shape, one of which is used as a sliding surface, but it is also possible to eliminate the step difference of the side wall of the cam groove and make The outer diameter of the shaft of the pin is a two-step shape, and the first step is used as a sliding surface against the side wall of the cam groove.

[0037] That is, as shown in FIG. 3, let the outer circumference (shaft outer circumference) of the pin shaft 11A be a two-step shape constituted by the outer circumference 11c and the outer circumference 11d, wherein the ou...

no. 3 example

[0039] Next, a third embodiment of the present invention will be described with reference to FIGS. 4 and 5 . Fig. 4 is a plan view showing a third embodiment of the present invention. Fig. 5 is a sectional view along line B-B of Fig. 4 . The same reference numerals as in the first embodiment denote elements having the same functions as in the first embodiment, and explanations are omitted.

[0040] In the first embodiment described above, the pin 11 is provided with the slit 11b. The slit 11b has flexibility at the sliding portion of the front end of the pin, so when the pin slides, the frictional resistance between the pin and the cam groove is reduced. On the other hand, in the third embodiment, the pin is not provided with any slit. The elastic deformation groove is provided near the cam groove of the second lever, whereby the side walls 30, 31 of the cam groove on the opposite sides are given flexibility.

[0041] As shown in FIG. 4 , the second rod 2B has a plurality ...

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Abstract

An operating lever system not requiring packing for preventing noise and any special function portion which reduces the number of parts and number of assembly steps and reduces the costs, that is, an operating lever system wherein the cam groove is formed in it middle portion with sharp bends where the curvature sharply changes, a front end of a pin is provided with a slit extending substantially in parallel to the two side walls of the cam groove and having a predetermined depth from the front end of the pin, at least part of the portion of the pin circumference substantially corresponding to a predetermined depth of the slit contacts the side walls without clearance, and the other portion of the pin circumference has a clearance from the side walls.

Description

technical field [0001] The present invention relates to an operating lever system in which a pin slides in a cam groove and two levers are driven in a predetermined positional relationship, and more specifically, the present invention relates to the operation of, for example, a vehicle air conditioning system door (mode switching door, etc.) rod system. Background technique [0002] The operating lever system inserts a pin provided on the driving lever in a cam groove formed in the driven lever, and rotates the driven lever by the pin sliding along the sliding surface of the cam groove as the driving lever rotates. Also, the shape of the cam groove is set such that the rotation angle of the driven lever forms a predetermined relationship with respect to the rotation angle of the driving lever. In order to obtain the above predetermined relationship, a central portion of the cam groove is often formed with a sharp bend in which the curvature changes sharply. [0003] Also, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60H1/34F24F13/10
Inventor 佐藤康弘四方一史神谷昌志
Owner DENSO CORP
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