TWI428580B - Pressing head structure for keypad life test - Google Patents

Description

Indenter device for button life test

The present invention relates to a head device for testing, and more particularly to a head device for use in a button life test in an electronic device.

Electronic devices, such as mobile phones, computers, game consoles, etc., use buttons as a tool for users to input information. The button is often repeatedly pressed and used, which is easy to damage. The life of the button is an important indicator for measuring the quality of the electronic device, and the life test of the button becomes very important.

Nowadays, the life of the button is automatically tested by the button life tester. Such a test machine typically includes a platform, a drive unit and a head unit. The button to be tested is fixed on the platform, and the driving device drives the indenter device to repeatedly apply pressure to the button. In general, the driving force of the driving device is relatively large and cannot be directly applied to the button, so the indenter device needs to be designed to have a function of buffering driving force. A conventional indenter device for mobile phone life testing includes a hollow conduit, a compression rod, a compression spring and a rubber head. The plunger passes through the hollow conduit and is slidable within the conduit. One end of the pressure bar is provided with a resisting portion. The compression spring is sleeved on the pressing rod, and the two ends are respectively abutted against the abutting portion of the pressing rod and the conduit. The rubber head is fixed to the other end of the pressing rod.

During the test, the pressing rod is connected with the driving device, and the electronic device with the button is fixed on the platform, and the driving device drives the pressing device to move downward. When the rubber head contacts the button, the pressing rod continues to press downward, and the spring is compressed to provide upward The reaction force relieves the pressure on the button by the pressure bar to a certain extent, avoiding The button is damaged due to excessive force. The degree of compression of the spring is different, and the reaction force provided is also different. The force applied to the button is different under the condition that the driving force is constant, and the pressure applied to the button by the pressing device is strictly regulated, such as a general mobile phone. The test pressure of the button is 3 pounds, so it is necessary to set the stroke of the pressure bar according to the height of a certain button to determine the force applied to the button. However, it is difficult to maintain the height of each button of the mobile phone. It is necessary to determine the stroke of the pressure bar according to the height of the different buttons to ensure that the force of the rubber head pressing on the button is the set pressure.

In view of this, it is necessary to provide a head device capable of providing a constant pressure.

A pressure head device for a button life test, comprising a pressure bar mechanism, a connecting mechanism, a balance mechanism and a rubber head. The pressing rod mechanism includes a movable rod and a first spring. The first spring sleeve is sleeved on the movable rod and is abutted against the connecting mechanism. The pressing rod mechanism and the rubber head are connected by a connecting mechanism, and the balancing mechanism is fixed to the connecting mechanism. It is connected to the pressure bar mechanism. The balance mechanism and the first spring provide a constant combined force in the direction of movement of the movable rod when the movable rod moves downward.

Compared with the prior art, the above-mentioned indenter device for the button life test uses the balance mechanism and the first spring to provide a constant combined force in the moving direction of the movable rod, and the pressure applied to the button within a certain range of movement of the movable rod constant. Therefore, when testing a button within a certain height range, it is not necessary to repeatedly calculate the stroke of the movable rod to ensure that the force pressed against the test button is a preset force, and the measurement is relatively accurate.

Referring to FIG. 1, a head device 100 for a button life test according to a preferred embodiment of the present invention includes a plunger mechanism 10, a coupling mechanism 20, a balance mechanism 30, and a rubber head 40. The link mechanism 20 connects the lever mechanism 10 and the balance mechanism 30. One end of the pressing mechanism 10 is connected to a driving device (not shown), and the driving device can drive the pressing mechanism 10 to move in three directions of X, Y, and Z. The rubber head 40 is fixed to one end of the connecting mechanism 20 relative to the pressing rod mechanism 10 for pressing a button to be tested.

Referring to FIG. 2 , the pressure bar mechanism 10 includes a movable rod 12 , an adjusting ring 14 , a first spring 16 and a sliding block 18 . The movable rod 12 has a connecting portion 122 and a rod portion 124. The adjusting ring 14 and the first spring 16 are sleeved on the rod portion 124. The connecting portion 122 is provided with a flange 126 that prevents the adjusting ring 14 and the first spring 16 from being disengaged from the movable rod 12. The adjusting ring 14 is provided with a threaded hole 142 whose axis is perpendicular to the rod portion 124. The threaded bore 142 mates with a screw 144 that can be secured to the stem 124 by tightening the screw 144. The first spring 16 abuts the adjustment ring 14 at one end and the other end abuts the coupling mechanism 20 such that the first spring 16 can be compressed by the adjustment ring 14 when the movable rod 12 slides downward. The sliding block 18 is a rectangular parallelepiped having an opening 182 at the top thereof and an interference fit with one end of the rod portion 124. A bearing hole 184 is formed in the middle of the sliding block 18 through the opposite sides thereof.

Referring to FIG. 3 , the connecting mechanism 20 includes a cover 22 , a carrier 24 , a base 26 , and a collet 28 . The cover body 22 has a substantially rectangular plate shape, and a through hole 222 is formed in the middle for allowing the rod portion 124 to be freely inserted. A threaded hole 224 is defined in each case.

The carrier body 24 is substantially a rectangular parallelepiped having two opposing first side walls 244, two opposite side walls 245 and a bottom plate 243. The two first side walls 244, the second side wall 245 and the bottom plate 243 define an accommodating cavity 242 that is open at one end. The accommodating cavity 242 is sized to cooperate with the sliding block 18, and the sliding block 18 can accommodate the cavity 242. Slide vertically inside. A mounting hole 246 is defined at each of the top ends of each of the first side walls 244, and the mounting holes 246 are located corresponding to the threaded holes 224. The fitting hole 246 and the threaded hole 224 correspond to each other. The second sidewall 245 is substantially lower in height than the first sidewall 244, such that a longitudinal oblong groove 247 is formed between each of the second sidewalls 245 and the first sidewalls 244. The through slot 247 communicates with the receiving cavity 242. One of the second sidewalls 245 further defines a threaded hole 248 for fixing the base 26. The bottom plate 243 of the carrier body 24 extends from the opposite side wings 25 in the direction opposite to the second side wall 245, and each of the side wings 25 defines a positioning hole 252 for fixing the collet 28.

The base 26 includes a fixing portion 262 and two wings 264 extending perpendicularly from one end of the fixing portion 262. The fixing portion 262 is a rectangular parallelepiped having a mounting hole 266 therebetween, and the mounting hole 266 is aligned with the threaded hole 248 of the carrier 24 during assembly. The two wings 264 are symmetrically distributed with respect to the fixing portion 262, and each of them has a threaded hole 365 whose axis is perpendicular to the mounting hole 266.

The chuck 28 includes a body 281 having a rectangular parallelepiped shape and a baffle 283 extending from both ends of the body 281. The main body 281 defines a first fixing hole 282 vertically in the middle portion thereof, and a second fixing hole 284 is defined in the horizontal direction. The axis of the first fixing hole 282 and the axis of the second fixing holes 284 The lines intersect perpendicularly. The second fixing hole 284 is a threaded through hole for corresponding to the positioning hole 252 of the side wing 25. The screw 286 cooperates with the second fixing hole 284 and the positioning hole 252.

Referring to FIG. 4, the balance mechanism 30 includes a pair of compression assemblies 32, a link 34, and an elongated pin 36. Referring to FIG. 5 , the compression assembly 32 includes a shaft 321 , a sleeve 322 , a second spring 323 , and a shaft pin 324 . The shaft 321 has a columnar portion 325 , a resisting portion 326 and a retaining portion 327 . The abutting portion 326 connects the retaining portion 327 and the column portion 325 . The columnar portion 325 is a long cylinder, and a long strip-shaped sliding groove 328 is formed at one end of the abutting portion 326 . The second spring 323 and the sleeve 322 can be sleeved on the columnar portion 325 of the shaft 321 . The abutting portion 326 has a disk shape and a diameter larger than a diameter of the second spring 323 for abutting against one end of the second spring 323. The holding portion 327 has two parallel cutting faces 3272, and a shaft hole 3274 is defined through the two cutting faces 3272. The axle pin 324 is a screw that includes a nut 3242 and a screw 3244. When assembled, the shaft 321 is rotatable about the axle pin 324. The sleeve 322 is a hollow cylinder with a through hole 3222 extending therebetween. The axis of the pin hole 3222 is perpendicular to the axis of the sleeve 322.

Referring to FIG. 6 , the connecting rod 34 includes a force receiving portion 342 and a threaded portion 344 . The force receiving portion 342 is tightly fitted with the bearing hole 184 of the sliding block 18, and the force receiving portion 342 is designed as a rectangular parallelepiped having a larger cross-sectional area than the threaded portion 344, which is advantageous for carrying and transmitting forces. The force receiving portion 342 is provided with a continuous through hole 346 at one end of the screw portion 344. A nut 348 mates with the threaded portion 344.

The long pin 36 includes a circular pin head 362, a pin 364 and two pin sleeves 366. The pin sleeve 366 is sleeved on the pin 364. The pin 364 can pass through the pin hole 3222 of the sleeve 322, the sliding groove 328 of the shaft 321 and the through hole 346 of the connecting rod 34. The pin 364 defines a through stop hole 368 at one end of the shaft pin 324. The stop hole 368 can be sleeved with an iron coil or a stud can be inserted to stop the compression assembly 32 from coming off the pin 364.

When assembling, please refer to FIG. 7 at the same time, firstly, the body 281 of the collet 28 is inserted between the two side flaps 25 until the two baffles 283 are abutted against the corresponding side flaps 25. At this time, the second fixing hole 284 is aligned with the positioning hole 252 of the side flap 25, and the collet 28 is fixed to the side flap 25 by the screw 286. Next, the mounting hole 266 of the base 26 is aligned with the threaded hole 248 of the carrier 24, and the base 26 is fixed to the carrier 24 by screws 268. The slider 18 is then placed into the receiving cavity 242 of the carrier 24. The threaded portion 344 of the connecting rod 34 is passed through the bearing hole 184 of the sliding block 18, and the nut 348 is tightened to securely connect the connecting rod 34 with the sliding block 18. after that. The threaded holes 224 are aligned with the mounting holes 246 of the carrier 24 and the cover 22 is secured to the carrier 24 by screws 226. The adjusting ring 14 and the first spring 16 are sequentially sleeved on the rod portion 124 of the movable rod 12, and the rod portion 124 is inserted into the opening 182 of the sliding block 18 with respect to one end of the connecting portion 122, through the interference fit and the sliding block 18 Fixed connection. The adjusting screw 14 is tightened by the screw 144 to fix the adjusting ring 14 to the movable rod 12. At this time, one end of the first spring 16 abuts against the cover 22, and the other end abuts against the adjusting ring 14. The two shafts 321 are respectively fixed to the base 26 by the two shaft pins 324, and then the second spring 323 and the sleeve 322 are sequentially sleeved on the corresponding shafts 321 . The pin 364 of the long pin 36 is sequentially passed through the pin hole of a bushing 322 3222, a sliding groove 328 of a shaft 321 , a pin sleeve 366 , a through hole 346 of the connecting rod 34 , another pin sleeve 366 , a pin hole 3222 of the other sleeve 322 and a sliding groove 328 of the other shaft 321 , and then The stop hole 368 at one end of the pin 36 is fitted with a coil sleeve or a stud is inserted so that the long pin 36 connects the compression assembly 32 and the link 34 together. Finally, the rubber head 40 is fixed to the first fixing hole 282 of the chuck 28 by a tight fit.

When working, please refer to FIG. 8 at the same time, the rubber head 40 abuts the button, the driving mechanism drives the movable rod 12 to move downward, and the first spring 16 is pressed. The movable lever 12 urges the slide block 18 to move downward, thereby moving the link 34 and the long pin 36 fixedly coupled to the slide block 18 downward. The long pin 36 presses one end of the press shaft 321 down, and the shaft 321 rotates around the shaft pin 324. At the same time, the long pin 36 slides inward along the sliding groove 328 of the shaft 321 to drive the sleeve 322 to press the second spring 323.

The first spring 16 is pressed to generate a resistance F1. It is assumed that K1 is the spring constant of the first spring 16, S'1 is the initial compression distance of the first spring 16, and ΔS1 is the distance that the movable rod 12 drives the first spring 16 to compress. F1 = K1 (S'1 + ΔS1), where S'1 can be set by adjusting the position of the adjustment ring 14 on the movable rod 12. When K1, S'1 is determined, F1 increases as ΔS1 increases.

The second spring 323 is compressed in the vertical direction to decompose a resistance F2, assuming that α is the angle between the shaft 321 and the horizontal plane, K2 is the elastic coefficient of the second spring 323, and S'2 is the initial compression distance of the second spring 323, ΔS2 When the rotation of the shaft 321 causes the second spring 323 to compress, the distance F2 = K2 (S'2 + ΔS2) Sin α, wherein S'2 can change the position of the sliding groove 328 of the shaft 321 and the length of the second spring 323. To set. When K2, S'2 is determined, along with the activity The rod 12 moves downward because ΔS2 changes less, and α↓, so F2↓. When α=0, F2=0.

The first spring 16 and the second spring 323 are set to have a resistance F in the vertical direction, and F=F1+F2=K1 (S'1+ΔS1)+K2 (S'2+ΔS2)sinα. As can be seen from the above, when the movable lever 12 moves downward, F1 ↑, and F2 ↓. Determine the values of K1, S'1, K2, and S'2 so that they satisfy the following conditions: K1(S'1+ΔS1)+K2 (S'2+ΔS2)sin α=constant (constant), then on the movable rod The resistance F provided by the first spring 16 and the second spring 323 in the vertical direction is a constant force within a certain range of movement.

It can be understood that the fixing portion 262 of the base 26 can be omitted, and the base 26 two wings directly extend from the carrier 24. The two side flaps 25 at the bottom of the carrier body 24 can also be omitted, and the collet 28 is integrally formed with the carrier body 24. The two pin sleeves 366 on the connecting rod 34 can be omitted. The connecting rod can be provided with a head. The two sides of the head are respectively abutted against the two sleeves 322, and the through holes 346 are disposed on the head. The threaded portion 344 of the connecting rod 34 can be omitted, and the force receiving portion 342 of the connecting rod 34 and the bearing hole 184 are fixedly coupled to the sliding block 18 by an interference fit.

It can be understood that, because the driving force of the driving device is constant, and the first spring 16 and the second spring 323 provide a constant combined force F in the vertical direction within a certain moving range of the movable rod 12, the pressure applied to the button is also constant. Therefore, when testing a button within a certain height range, it is not necessary to repeatedly calculate the stroke of the movable rod 12 to ensure that the force pressing the test button is a preset force.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above is only a preferred embodiment of the present invention, and the present invention The scope of the invention is not limited to the above-mentioned embodiments, and equivalent modifications or variations made by persons skilled in the art to the spirit of the invention are intended to be included in the scope of the following claims.

Indenter device ‧‧100

Pressure bar mechanism ‧‧10

Activity pole ‧‧12

Connection Department ‧‧122

Pole ‧‧124

Flange ‧‧‧126

Adjustment ring ‧‧14

First spring ‧‧16

Threaded holes ‧‧‧142, 224, 248, 265

Screws ‧‧‧144, 226, 268, 286

Sliding block ‧‧18

Opening ‧‧182

Carrying hole ‧‧‧184

Connection mechanism ‧ ‧ 20

Cover ‧‧22

Through hole ‧‧222

Carrier ‧‧24

Housing cavity ‧‧242

Base plate ‧ ‧ 243

First side wall ‧‧‧244

Second side wall ‧ ‧ 245

Assembly hole ‧‧‧246

槽‧‧‧247

Flank ‧‧25

Positioning hole ‧‧ 252

Pedestal ‧‧26

Fixed Department ‧‧262

Wing ‧‧‧264

Mounting hole ‧‧‧266

Chuck ‧‧28

Ontology ‧‧‧281

First fixed hole ‧‧‧282

Baffle ‧‧283

Second fixing hole ‧‧‧284

Balance Agency ‧ ‧ 30

Compression component ‧‧‧32

Shaft ‧ ‧ 321

Bushing ‧‧‧322

Pin hole ‧‧32222

Second spring ‧‧323

Shaft pin ‧‧ 324

Nuts ‧‧3242

Screw ‧‧3,344

Column ‧ ‧ 325

Relief Department ‧ ‧ 326

Holding Department ‧‧‧327

Face ‧‧‧3272

Chute ‧‧ 328

Connecting rod ‧‧‧34

Force Department ‧‧342

Thread part ‧‧‧344

Through hole ‧ ‧ 346

Nut ‧‧ 348

Long sales ‧‧‧36

Head ‧ ‧ 362

Pin ‧ ‧ 364

Pin ‧ ‧ 366

Stop hole ‧‧‧368

1 is a perspective exploded view of a preferred embodiment of the present invention; FIG. 2 is a perspective view of a preferred embodiment of the present invention; FIG. 3 is an exploded perspective view of a preferred embodiment of the present invention; FIG. 5 is a perspective exploded view of a compression assembly according to a preferred embodiment of the present invention; FIG. 6 is a perspective view of a combination of a connecting rod and a long pin according to a preferred embodiment of the present invention; BRIEF DESCRIPTION OF THE DRAWINGS FIG. 8 is a perspective view showing the operation of a pressure head device according to a preferred embodiment of the present invention. FIG.

Indenter device ‧‧100

Activity pole ‧‧12

Adjustment ring ‧‧14

First spring ‧‧16

Screws ‧‧‧144, 268, 286

Sliding block ‧‧18

Cover ‧‧22

First side wall ‧‧‧244

槽‧‧‧247

Flank ‧‧25

Pedestal ‧‧26

Wing ‧‧‧264

Chuck ‧‧28

Bushing ‧‧‧322

Second spring ‧‧323

Shaft pin ‧‧ 324

Relief Department ‧ ‧ 326

Holding Department ‧‧‧327

Chute ‧‧ 328

Connecting rod ‧‧‧34

Nut ‧‧ 348

Long sales ‧‧‧36

Claims (13)

An indenter device for a button life test, comprising a pressing rod mechanism, a connecting mechanism and a rubber head, the pressing rod mechanism comprising a movable rod and a first spring, the first spring is sleeved on the movable rod and Reacting with the connecting mechanism, the pressing rod mechanism and the rubber head are connected by a connecting mechanism, the improvement is that the pressing head device further comprises a balancing mechanism fixed to the connecting mechanism and connected with the pressing rod mechanism, when When the movable rod moves downward, the balance mechanism and the first spring provide a constant combined force in the moving direction of the movable rod. The indenter device for the button life test according to the first aspect of the invention, wherein the pressure bar mechanism further comprises a sliding block, the sliding block is connected to one end of the movable rod, and the connecting mechanism is provided with a receiving cavity. The sliding block is movably received in the accommodating cavity. The indenter device for the button life test according to the second aspect of the invention, wherein the connecting mechanism comprises a cover body and a carrier body, the cover body is fixed on the carrier body, and the receiving cavity is opened in the On the carrier, one end of the first spring abuts against the cover body, and the movable rod passes through the cover body and is connected to the sliding block. The indenter device for a button life test according to claim 3, wherein the balance mechanism comprises at least one compression component and a link, the link is fixedly connected to the sliding block, and the compression component is rotatable at one end. The ground is fixed to the connecting mechanism, and the other end is fixedly connected with the connecting rod. The indenter device for the button life test described in claim 4, wherein the number of the compression components is two, each of which The compression assembly comprises a shaft rod, a sleeve sleeve, a second spring and a shaft pin, the shaft rod has a resisting portion, the second spring and the sleeve sleeve are sleeved on the shaft rod, and the second spring ends are respectively connected with the sleeve and the shaft The abutting portion of the rod abuts, and the shaft is rotatably fixed to the connecting mechanism by a shaft pin. The indenter device for the button life test according to the fifth aspect of the invention, wherein the shaft has a sliding slot, the sleeve has a pin hole, the connecting rod is provided with a consistent perforation, and the balancing mechanism further comprises A long pin that connects the compression assembly and the connecting rod through cooperation with the pin hole of the sleeve, the sliding groove of the shaft and the through hole of the connecting rod. The indenter device for the button life test according to claim 6, wherein the long pin is sleeved with two pin sleeves, and the pin sleeve is located between the sleeve and the connecting rod. The indenter device for a button life test according to claim 5, wherein the connecting mechanism further comprises a base fixed to the carrier, the base having two opposite wings, The shafts are respectively connected to the corresponding flaps. The indenter device for use in a button life test according to claim 3, wherein the connecting mechanism further comprises a collet fixed to a bottom of the carrier, the rubber head being fixed to the collet. The indenter device for the button life test according to the fourth aspect of the invention, wherein an opening is formed in the top of the sliding block, and a bearing hole is formed in the middle portion, the opening is matched with one end of the movable rod, the bearing hole Cooperate with the connecting rod. For use in the button life test as described in claim 10 The indenter device, wherein the connecting rod includes a force receiving portion and a threaded portion, the force receiving portion cooperates with a bearing hole of the sliding block, the threaded portion passes through the bearing hole, and the connecting rod passes through a screw and the threaded portion The fit is fixedly coupled to the slider. The indenter device for the button life test according to the fourth aspect of the invention, wherein the carrier has two opposite first sidewalls and two opposite second sidewalls, each of which has a through slot. The through groove communicates with the accommodating cavity, and the two ends of the connecting rod respectively pass through the through grooves of the two second side walls. The indenter device for a button life test according to claim 1, wherein the strut mechanism further comprises an adjusting ring fixed to the movable rod and abutting against the first spring end.