CN101819099A

CN101819099A - Push rod of key testing machine

Info

Publication number: CN101819099A
Application number: CN201010140297A
Authority: CN
Inventors: 孙智红
Original assignee: Kunshan Zhongruida Electronics Co Ltd
Current assignee: Kunshan Zhongruida Electronics Co Ltd
Priority date: 2010-03-31
Filing date: 2010-03-31
Publication date: 2010-09-01

Abstract

The invention provides a push rod of a key testing machine, comprising a pipe seat, a press rod, a spring and a push block, wherein the pipe seat is provided with a screw hole, an upper bearing and a lower bearing are respectively screwed in both ends of the screw hole, and either the upper bearing or the lower bearing is provided with a groove; the press rod is provided with a first end and a second end which are accommodated in the screw hole of the pipe seat and supported to slide by the upper bearing and the lower bearing; the middle of the press rod is provided with a convex ring; the spring is sleeved to the press rod and positioned between the upper bearing and the convex ring; and the push block is combined to the first end of the press rod. The push strength of the push rod of the key testing machine is adjusted through adjusting the groove arranged on either of the upper bearing and the lower bearing.

Description

Push rod of key testing machine

Technical field

The present invention relates to a kind of push rod of key testing machine, particularly relate to a kind of push rod of key testing machine that can finely tune the calibration pressing force and can show pressing force by scale.

Background technology

Electronic goods is hand telephone set for example, calculator keyboard, portable electron devices etc. all have many buttons, in processing procedure or the finished product finished of combination must be good with the quality of guaranteeing button by test, the mode of test is normally utilized a kind of reciprocating key testing machine of a measuring head that drives, button is carried out testing fatigue or life test, for example China discloses " key testing machine " patent of invention CN101236147A number, and CN2906582Y number " key testing machine " utility model patent of China's bulletin, its piston that utilizes air pressure to drive cylinder is released, test with the button of pushing electronic goods to be measured, but it has following shortcoming:

1. the strength of pushing with air pressure promotion piston is difficult for adjusting, and the difference that is difficult to suitable different electronic goods is pushed the strength requirement.

2. spring is pushed strength and is weakened, and can't adjust through producing elastic fatigue after the test for a long time.

Therefore, be necessary to improve above-mentioned shortcoming, develop a kind of can the adjustment easily and push strength, and can directly read the push rod of key testing machine of pushing the strength size by scale.

Summary of the invention

The object of the present invention is to provide a kind of push rod of key testing machine, it can be adjusted easily and push strength, and can directly be read by scale and push the strength size.

The technical solution used in the present invention is:

A kind of push rod of key testing machine,, it comprises pipe, a depression bar, a spring and a briquetting.The seat pipe is provided with a screw, and the screw two ends are screwed into a head bearing and a lower bearing respectively, and one of head bearing or lower bearing are provided with groove; Depression bar has one first end and one second end, and it is placed in the screw of a pipe, is supported by head bearing and lower bearing and slides, and is provided with a projection in the middle of the depression bar; Spring housing is located at depression bar and between head bearing and projection; Briquetting is incorporated into first end of depression bar.

By the set groove of one of head bearing or lower bearing is adjusted, to adjust the strength of pushing of push rod of key testing machine.

According to a wherein embodiment of the present invention, described depression bar surface is provided with scale.

According to a wherein embodiment of the present invention, second end of described depression bar is provided with screw thread, and described screw thread is adjusted a nut and a hold-doun nut in conjunction with one.

According to a wherein embodiment of the present invention, be provided with a packing ring between described adjustment nut and the seat pipe.

According to a wherein embodiment of the present invention, described push rod of key testing machine is incorporated into the movement arm of a test machine.

According to a wherein embodiment of the present invention, described movement arm is provided with an assembly hole.

According to a wherein embodiment of the present invention, described movement arm is provided with the fixing described push rod of key testing machine of a packing screw.

According to a wherein embodiment of the present invention, described head bearing and lower bearing outside surface have checknut.

Purpose of the present invention, advantage and characteristics will illustrate by the non-limitative illustration of following preferred embodiment and explain that these embodiment only provide as an example with reference to accompanying drawing.

Description of drawings

Fig. 1 is the exploded perspective view of push rod of key testing machine preferred embodiment of the present invention;

Fig. 2 is the assembled sectional view of push rod of key testing machine preferred embodiment of the present invention;

Fig. 3 is the action synoptic diagram of Fig. 2 of the present invention;

Fig. 4 is the pressing force fine setting calibration synoptic diagram of push rod of key testing machine preferred embodiment of the present invention;

The Reference numeral that relates among the figure is as follows:

10. 20. pipes of push rod of key testing machine

21. screw 22. head bearings

221. groove 23. lower bearings

231. groove 24. bottom faces

25. spring 30. depression bars

31. first end, 32. second ends

321. screw thread 33. projections

34. rule 40. briquettings

41. combined hole 50. is adjusted nut

51. screw thread 52. packing rings

60. hold-doun nut 70. buttons

80. movement arm 81. assembly holes

82. packing screw

Embodiment

The explanation of following examples is graphic with reference to what add, can be in order to the specific embodiment of implementing in order to illustration the present invention.The direction term that the present invention mentioned, for example " on ", D score, " preceding ", " back ", " left side ", " right side ", " top ", " end " etc., only be direction with reference to annexed drawings.Therefore, the direction term of use is in order to explanation and understands the present invention, but not in order to restriction the present invention.

For allowing above-mentioned purpose of the present invention, feature and advantage become apparent, preferred embodiment of the present invention cited below particularly, and conjunction with figs. are described in detail below:

Please also refer to Fig. 1 and Fig. 2, Fig. 1 is the exploded perspective view of push rod of key testing machine preferred embodiment of the present invention; Fig. 2 is the assembled sectional view of push rod of key testing machine preferred embodiment of the present invention; Push rod of key testing machine 10 of the present invention comprises a pipe 20, one depression bar 30, a briquetting 40, is adjusted a nut 50 and a hold-doun nut 60.Seat pipe 20 can be contained in an assembly hole 81 of the movement arm 80 of a key testing machine, and is fixed on the stable combination of one-tenth on the movement arm 80 by a packing spiral shell 82; Movement arm 80 is driven reciprocating by key testing machine, its driving back and forth be configured to common mechanical mechanism, will not describe in detail in this.

Seat pipe 20 centers are provided with the screw 21 of perforation, and screw 21 voltage supply bars 30 and a spring 25 are inserted, and there is a bottom face 24 bottom of seat pipe 20.The upper/lower terminal of screw 21 is screwed into a head bearing 22, a lower bearing 23 with screw-in version respectively, and depression bar 30 can slide in screw 21 smoothly by the support of upper and lower bearing 22,23.Upper and

lower bearing

22,23 the bests are made by copper, plastics, pottery or the materials such as alloy with pore, the outside surface of upper and

lower bearing

22,23 is checknut (such as but not limited to the screw thread with the anti-glue (NYLOK) that falls), and a wherein end of upper and

lower bearing

22,23 is respectively equipped with groove 221,231.

Depression bar 30 is provided with first end 31, second end, 32, the first ends 31 combine with a combined hole 41 of briquetting 40, and briquetting 40 is made for rubber-like materials such as rubber, silica gel, its in order to be tested by key contacts.Be provided with a projection 33 between first end 31 and second end 32, depression bar 30 is provided with screw thread 321 near the periphery of second end 32, screw thread 321 combines with screw thread 51 and the hold-doun nut 60 of adjusting nut 50, adjust between nut 50 and the screwed pipe 20 and be provided with packing ring 52, packing ring 52 is soft materials such as rubber, can avoid adjusting nut 50 and directly clash into, in test is carried out, play buffering and the effect that reduces noise with seat pipe 20.The outside surface of reference test bar 30 is provided with rule 34, and position the best of rule 34 is between the projection 33 and first end 31.

Please refer to the assembled sectional view of Fig. 2 push rod of key testing machine preferred embodiment of the present invention.Spring 25 is placed in the screw 21 of seat pipe 20, and the upper end stays on head bearing 22, the projection 33 of lower end pushing and pressing depression bar 30, and when spring 25 was upheld fully, projection 33 relied on lower bearing 23, made depression bar 30 can not break away from seat pipe 20.

Please refer to Fig. 3, Fig. 3 is the action synoptic diagram of Fig. 2.Test is the below that electronic product to be measured is placed test machine when carrying out, push rod of key testing machine 10 is adjusted in alignment with directly over the electronic goods button to be measured, start after the test machine, movement arm 80 drives whole push rod of key testing machine 10 and pumps, and makes quality and the life-span of briquetting 40 continuous repeated presses buttons 70 with the test button.The contact that repeats when briquetting 40 and push button 70 when testing, briquetting 40 is subjected to button 70 reacting force pushing tow depression bars 30 upwards, and by projection 33 compression springs 25, accumulate the strength of answer by compression spring 25, the strength size of its pressing keys 70 also is same as the response force of spring 25; Drive whole push rod of key testing machine 10 and move up when movement arm moves up, briquetting 40 is left button 70, and depression bar 30 moves down by spring 25 restoring force pushing tows, replys the state of Fig. 2.

Different electronic goods checks have different pressing force requirements, when desire is adjusted pressing force, unclamp hold-doun nut 60 earlier adjustment nut 50 can be rotated with respect to depression bar 30, and make adjustment nut 50 produce axial displacement at depression bar 30 by the relative motion of screw thread 51 and screw thread 321.Because rule 34 is to portray on depression bar 30 outside surfaces by prior accurate correction, therefore, when rotation adjustment nut 50 makes depression bar 30 up mobile, projection 33 is with compression spring 25, and then the pressing force of increase depression bar 30, simultaneously can manage 20 lower surface 24 and inspect corresponding rule 34 readings, can show adjusted pressing force, and need not measure with other pressure measuring instrument by seat.After the pressing force adjustment was finished, nut 50 was adjusted in 60 packings of rotation hold-doun nut, made to adjust not depression bar 30 generation displacements relatively again of nut 50.

Please refer to the pressing force fine setting calibration synoptic diagram of Fig. 4 push rod of key testing machine preferred embodiment of the present invention.After through long test, spring 25 may produce elastic fatigue, the pressure data that rule 34 is read is not correct, this makes as long as the groove 221,231 that stretches into one of head bearing 22 or lower bearing 23 with forked type instrument (not illustrating) is adjusted, make the screw 21 interior positions (Fig. 4 adjusts lower bearing 23) that change of head bearing 22 or lower bearing 23 present pipes 20, can change the strength of spring 25, make it consistent by the testing tool calibration again with the reading of rule 34.

Because different electronic products has different button height, or the different key of identical product also may have differing heights, when desire is adjusted push rod of key testing machine 10 of the present invention compared to the height of button to be measured, loosen packing screw 82 earlier, then adjust the height of push rod of key testing machine 10 with respect to movement arm 80, again packing screw 82 is tightened compressing seat pipe 20 after to be adjusted the finishing, seat pipe 20 can not moved with respect to movement arm 80 again.

Push rod of key testing machine of the present invention drives push rod of key testing machine 10 by the movement arm 80 of a test machine and pumps, and the button 70 of pushing electronic product to be tested carries out the test of life-span or quality.Can adjust the size of pressing force, and, when the elastic fatigue phenomenon appears in spring 25, can finely tune the elastic force of correcting spring 25 simultaneously directly by the adjusted pressure value of rule 34 interpretations, in the process of carrying out product test, it is the time that can shorten adjustment in a large number.

Certainly, more than only be concrete exemplary applications of the present invention, protection scope of the present invention is not constituted any limitation.In addition to the implementation, the present invention can also have other embodiment.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop within the present invention's scope required for protection.

Claims

1. push rod of key testing machine, it is characterized in that: described push rod of key testing machine comprises:

A pipe, it is provided with a screw, and described screw two ends are screwed into a head bearing and a lower bearing respectively, and one of described head bearing or lower bearing are provided with groove;

One depression bar has one first end and one second end, and it is placed in the screw of described seat pipe, is supported by described head bearing and lower bearing and slides, and is provided with a bulge loop in the middle of the described depression bar;

One spring, it is sheathed on described depression bar and between described head bearing and bulge loop;

One briquetting is incorporated into first end of described depression bar;

2. push rod of key testing machine as claimed in claim 1 is characterized in that: described depression bar surface is provided with scale.

3. push rod of key testing machine as claimed in claim 2 is characterized in that: second end of described depression bar is provided with screw thread, and described screw thread is adjusted a nut and a hold-doun nut in conjunction with one.

4. push rod of key testing machine as claimed in claim 3 is characterized in that: be provided with a packing ring between described adjustment nut and the seat pipe.

5. push rod of key testing machine as claimed in claim 4 is characterized in that: described push rod of key testing machine is incorporated into the movement arm of a test machine.

6. push rod of key testing machine as claimed in claim 5 is characterized in that: described movement arm is provided with an assembly hole.

7. push rod of key testing machine as claimed in claim 6 is characterized in that: described movement arm is provided with the fixing described push rod of key testing machine of a packing screw.

8. push rod of key testing machine as claimed in claim 4 is characterized in that: described head bearing and lower bearing outside surface have checknut.