KR20080112774A - Device for testing click sensitive of keypad in mobile phone - Google Patents

Abstract

A device for inspecting clicking-sensitivity of a mobile phone keypad is provided to determine whether the clicking sensitivity of a key is in a set range or not automatically and precisely. A die has a plurality of working holes corresponding to each pressing protrusion(2) on the bottom surface of a key pad(K). A lifting block(20) has a plurality of pressing pins protruded downward for pressing each key(3) simultaneously by lifting by a predetermined stroke. A plurality of plungers(30) contact lower ends of the pressing protrusions. A plurality of sensors(40) detect lowering distances of the plungers. A control part(50) determines good or bad states of the keys. A display unit(60) displays the determination result.

Description

Device for testing click sensitive of keypad in mobile phone}

1 is a perspective view showing an example of a mobile phone,

Figure 2 is a partially separated perspective view showing the keypad of the mobile phone,

3 is an enlarged sectional view showing main parts of an operating structure of a mobile phone keypad;

Figure 4 is an exploded perspective view showing a click sensitivity inspection apparatus of a mobile phone keypad according to the present invention;

5 is a cross-sectional view of the coupled state of FIG.

6a to 6c is a cross-sectional view showing the main portion excerpts sequentially showing the operation of the keypad click sensitivity inspection apparatus of the present invention,

7 is a front view schematically showing an example of a method of displaying the inspection result of the keypad click sensitivity inspection apparatus of the present invention on a monitor.

<Description of Symbols for Main Parts of Drawings>

K: keypad 1: base sheet

2: push-out 3: key

P: printed circuit board S: dome switch

10: die 11: working hole

14: pilot pin 20: lift block

20a: Top holder 20b: Support block

21: Push pin 22: Key receiving groove

23: guide hole 30: plunger

34: spring 40: detection sensor

50: control unit 60: positive and negative display means

61: indicator lamp 62: alarm buzzer

70: cylinder rod 80: monitor

The present invention relates to a keypad inspection apparatus of a mobile phone (mobile communication terminal), and more particularly, whether or not the click sensitivity when pressing each key of the keypad for use of the mobile phone is within the set range. It can be inspected accurately, and accordingly various defects of the manufactured keypads such as bad push-out and non-molding of base sheet, bad thickness of key, poor adhesive amount of multi-key, and poor bending of multi key. The present invention relates to a click sensitivity inspection device for a keypad of a mobile phone that can easily detect a problem.

As is well known, in addition to voice calls, mobile phones are generally equipped with various additional functions such as text messages, image data transmission and reception, camera functions as well as multimedia, games, the Internet, e-mail, and electronic albums in response to various consumer needs.

Accordingly, as shown in FIG. 1, the mobile phone M is a switch device for performing additional functions such as inputting new data into the device or retrieving and executing various data inputted together with a dial function for a call. The keypad K is provided.

As shown in FIG. 2, the keypad K has a predetermined pattern on the bottom of the plurality of push protrusions 2 for pressing the dome switches S provided at the contact positions of the printed circuit board P, respectively. It consists of a flexible base sheet (1), such as rubber or synthetic resin film, and a synthetic resin plate on which numbers, letters, or specific shapes are printed, and adheres to the upper surface of the base sheet (1) to correspond to the pressing protrusions (2). Consisting of a number of keys 3.

In the keypad K, as shown by the virtual line in FIG. 3, when the key 3 is pressed, the pressing projection 2 of the base sheet 1 corresponding to the key 3 is positioned under the printing. The center portion of the dome switch S of the circuit board P is pressed, and the center portion of the dome switch S, which is upwardly convex, is elastically deformed downward to contact the contact C provided on the printed circuit board P. By momentarily energizing, the operation signal of the corresponding key 3 is inputted. And the key 3 is pressed down by the restoring elasticity of the dome switch (S) when the external force is removed to return to the initial position.

Therefore, in order to ensure the reliability of the keypad K, it is necessary for each key 3 operating independently of each other with the accuracy of the operation to have a uniform click sensitivity within a range that is not too sensitive or dull in the line that the user generally feels. have.

That is, when pressing each key (3), any key (3) is operated by lightly clicking lightly, and one key (3) is not necessarily operated by pressing hard with conscious force, and each key (3) is consistently constant. When the external force is applied, it should be able to be operated correctly without error, especially when the sensitivity of the key (3) is not too sensitive to operate even in unconscious light touch, and it must be pressed by the user with conscious force. It should be able to operate in an appropriate external force range so as not to be blunt enough.

For example, if the click sensitivity of the key 3 is too sensitive, an unwanted key 3 is likely to be wrongly clicked even when the user does not actually feel it. On the contrary, if the click sensitivity of the key 3 is too blunt, Since 3) must be consciously applied with great force, both of them can adversely affect the reliability of the keypad K and the ease of use.

In consideration of this point, as shown in FIG. 3, the keypad K of the mobile phone M has a dome switch of the printed circuit board P having a lower end of the push protrusion 2 for pressing the dome switch S. S) Maintains a slight gap (S ₁ ) with the center part to suppress excessive sensitive reactions when clicked. In the case of the dome switch (S), it is generally designed to have a very small gap (S ₂ ) and the contact (C) of the printed circuit board (P) so that the contact (C) can be quickly energized even with a light click.

For reference, the gap S ₂ between the dome switch S and the printed circuit board P contact C is formed to be about 0.15 mm, and the push protrusion 2 of the dome switch S and the base sheet 1 is formed. It is known that the click sensitivity of the key 3 is the best when the gap S ₁ between) is about 0.1 mm.

By the way, the keypad K forms the pressing protrusion 2 on the back surface of the base sheet 1 by a UV mold printing method, cuts the synthetic resin panel disc into a predetermined shape to produce the key 3, and then the base sheet 1 Since the adhesive is attached on the top surface, the operation interval of the key 3, which is set as a fine gap even when a small error (bad amount of adhesive, bad key thickness, bad protrusion amount and unformed) occurs in the manufacturing process (S) ₁ + S ₂ = 0.25 mm), which significantly affects the click sensitivity.

In particular, since a plurality of keys 3 formed separately from each other are operated independently in a state in which they are attached to one base sheet 1, the degree of click sensitivity of all or some of the keys 3 is required depending on manufacturing precision. Frequent departures occur.

Therefore, after the manufacture of the keypad (K) is completed, it is necessary to check the click sensitivity of each key (3), conventionally there is no special equipment for checking the click sensitivity of the keypad (K), for example, a domestic patent As shown in Japanese Patent Application No. 2002-0019714 and Registration Registration No. 20-0401906, the amount / part of the keypad was judged only by the usual inspection such as whether each key was properly attached at a predetermined position and whether the corresponding function worked properly when clicked.

As a result, even the same product may have different click sensitivities for each product, and in some cases, the click sensitivities of various keys 3 in the same keypad K may be different, making it difficult to secure the reliability of the keypad K and the mobile phone employing the same. .

The present invention has been devised to solve the above-mentioned conventional problems, and can automatically check whether or not the click sensitivity when pressing each key of the keypad is within the set range, and accurately checks the base according to the test result. The purpose of the present invention is to provide a click sensitivity inspection device of a mobile phone keypad that can easily detect various defects of the finished keypad, such as poor pressing protrusion and unformed sheet, poor thickness of adhesive, poor adhesive coating amount, and poor bending of multi keys. have.

Another object of the present invention is to provide a click sensitivity inspection apparatus for a cellular phone keypad which can determine the amount / part of each key individually while being able to simultaneously check the click sensitivity of multiple keys.

In order to achieve the above objects, the click sensitivity inspection apparatus for a mobile phone keypad according to the present invention includes: a die having a plurality of operating holes to which the keypad is seated and fixed to correspond to each push projection on the bottom of the keypad; A lifting block having a plurality of push pins protruding downward to correspond to each push protrusion of the keypad, and lifting and lowering a predetermined stroke at the top of the keypad to simultaneously press each key; An actuator for elevating the elevating block with a predetermined stroke; A plurality of plungers accommodated in each working hole of the die and upwardly elastic biased, the upper end of which is in contact with the lower end of the pusher of the keypad; A plurality of detection sensors disposed at equal intervals directly below each of the operation holes of the die and detecting a falling distance of the corresponding plungers according to the falling of the lifting block; A control unit for inputting information of a keypad to be inspected, including predetermined reference data about the lowering of the push protrusions when the keypad is clicked, and comparing the detection data input from each detection sensor with the reference data to determine the quantity / part of each key; And a quantity / part display means for displaying the quantity / part of the keypad according to the determination result of the controller.

According to a preferred feature of the present invention, the display is connected to the control unit to display the configuration of the keypad being inspected, and according to the determination result of the control unit further comprises a monitor that individually displays the quantity / part of each key of the keypad, only bad keys By making corrections, the keypad itself is minimized.

According to another preferred feature of the invention, the key receiving groove is formed on the bottom surface of the lifting block at a depth corresponding to the thickness of the key so that each key of the keypad is accommodated at the same time, each push pin protrudes a predetermined length from the bottom of the key receiving groove As a result, the lifting block is firmly fixed to the edge of the keypad while pressing the key to increase the accuracy of the detection data.

According to still another preferred feature of the present invention, a plurality of pilot pins are provided to protrude from the fixing holes provided at the edge of the keypad on the upper surface of the die, and are coupled to each pilot pin in the lifting block. A plurality of guide holes are formed to induce a precise lowering of the elevating block with quick and accurate seating of the keypad to the die.

Accordingly, the present invention can automatically and accurately check whether the tension (tension) and click sensitivity when pressing each key of the keypad meets the set value, as well as simultaneously checking the click sensitivity of multiple keys The quantity / part of each key can be determined individually, which contributes to the productivity of the keypad and minimizes the unreasonable result of discarding the keypad itself due to the failure of some keys.

In addition, through the keys that are determined to be defective, various defects of the manufactured keypads can be easily detected, such as a bad push-out of the base sheet, a non-molding, a bad thickness of the key, a poor amount of adhesive coating, and a bad bending of the multi-key. By simply modifying only the defective key, it is possible to greatly reduce the occurrence of the defective keypad.

Therefore, the present invention can greatly contribute to improving the quality and reliability of the mobile phone keypad as well as improving the productivity.

Such specific features and other advantages of the present invention mobile phone keypad click sensitivity inspection device will become more apparent from the following description of the preferred embodiment with reference to the accompanying drawings.

4 and 5, the click sensitivity inspection apparatus of the mobile phone keypad according to the present invention is the die 10, the keypad K to be inspected is mounted on the upper surface and the keypad K seated on the die 10. It moves downward along the lowering of the elevating block 20 by contacting the elevating block 20 simultaneously pressing each key 3 and each pressing protrusion 2 on the bottom of the keypad K seated on the die 10. A plurality of plungers 30, a plurality of detection sensors 40 for detecting the falling distance of the plungers 30, and the detection data of the detection sensor 40 to determine the amount / part of each key (3) It is comprised by the quantity / part display means 60 which displays the quantity / part of the keypad K according to the determination result of the control part 50 and the control part 50. As shown in FIG.

The die 10 vertically has a plurality of operating holes 11 into which the respective push protrusions 2 are fitted, corresponding to the push protrusions 2 of the keypad K to be inspected, respectively. In each operation hole 11, a support jaw 12 for supporting the lower end of the spring 34 for elastically biasing the plunger 30 to be described later is formed.

Preferably, the upper surface of the die 10 is formed to correspond to the lower surface of the base sheet 1 of the keypad K to stably support the keypad K to be seated. However, while maintaining a constant distance between the embossing portion (embossing portion: 1a) to which each key (3) is attached to allow the elastic deformation of the base sheet (1) according to the lowering of the elevating block (20), FIG. As shown in FIG. 3, the ribs 1b for maintaining the gap with the printed circuit board P have rib grooves 13 to be inserted.

At this time, the portion facing the embossed portion 1a of the keypad 1 may be configured in the same plane as other portions, but may be formed concave so as not to interfere with the elastic deformation of the base sheet 1 as shown. have.

On the other hand, a plurality of pilot pins that are respectively fitted to the plurality of fixing holes (1c) provided on the edge of the base sheet 1, so that the keypad (K) is seated in the correct position on the upper edge portion of the die (10) 14 is provided to protrude vertically. These pilot pins 13 also serve to guide the lifting block 20 to descend to the correct position as described below.

The lifting block 20 is arranged to correspond to each of the keys 3 of the keypad K, preferably each of the pressing protrusions 2 of the base sheet 1, and a plurality of pressings for pressing the corresponding keys 3, respectively. With the pin 21 vertically, this lifting block 20 is mounted on a piston rod 70 of a cylinder (not shown), for example, and moves up and down by a predetermined stroke.

The lifting block 20 may simply be configured as a plate having only a plurality of push pins 21, but preferably each push pin 21 while holding the keypad K stably on the die 10 so as not to flow. In order to press this key 3, the lower surface of the elevating block 20 has a key receiving groove 22 for receiving all the keys 3 of the keypad K, and the lower end of each push pin 21 is a key. It is configured to protrude a predetermined length from the bottom of the receiving groove (22).

At this time, the depth of the key receiving groove 22 is formed to correspond to the thickness of the key (3), the protruding length (L) of each pressing pin 21 is the operating interval of the pressing projection 2 (S ₁ of Figure 3 + S ₂ ), the edge of the lifting block 20 presses each key 3 thereof while pressing and fixing the edge of the keypad K base sheet 1 with respect to the die 10. pitch of the _{(2) (S 1 + S} 2) gives exactly by pressing.

The lower edge of the elevating block 20 is coupled to each of the pilot pins 14 protruding vertically upward from the edge of the die 10 to support the keypad (K) to guide the accurate lowering of the elevating block 20. A plurality of guide holes 23 are formed for.

On the other hand, the protruding length (L) of the push pin 21 so as to correspond to the operating interval (S ₁ + S ₂ ) of the keypad (K) pressing protrusion 2, which can usually obtain a click sensitivity that users feel most comfortable. The operation interval (S ₁ + S ₂ ) of the push protrusion (2) is a very fine gap of about 0.25 mm, which should be set very precisely, and even if the user changes minutely due to repeated inspection. The click sensitivity you feel can vary greatly.

Therefore, it is more preferable that the protruding length L of the push pin 21 with respect to the bottom of the key receiving groove 22 of the elevating block 20 can be adjusted as necessary.

To this end, the lifting block 20 of the inspection apparatus of the present invention has a key receiving groove 22 that simultaneously receives each key 3 of the keypad K on the bottom thereof, and has a depth corresponding to the thickness of the key 3 and the key. A top holder (20a) having a plurality of support holes (24) at the bottom of the receiving groove (22) so as to correspond to the respective pressing protrusions (2) of the keypad (K), and an upper side of the top holder (20a). A lower end portion protrudes from the bottom of the top holder 20a through a support block 20b mounted to the cylinder rod 70 and connected to the top holder 20a to be adjusted to a distance therebetween, and each of the support holes 24 of the top holder. It consists of a plurality of push pins 21 fixed to the support block 20b.

The top holder 20a and the support block 20b may be connected in various forms. For example, as illustrated, a plurality of connection holes 25 are formed in the support block 20b, and the top holder 20a is formed. ) May be implemented by forming a screw hole 26 to correspond to the connection holes 25 and then tightening the adjusting bolt 28 through the compression coil spring 27 therebetween.

The push pin 21 has a large diameter head 21a at the top thereof and may be fixed to a lower surface of the support block 20b by a screw, or the head 21a to the support block 20b. ) May be elastically biased toward the support block 20b via the compression coil spring 27 between the head 21a and the top holder 20a after the groove 29 is seated. .

And when the lifting block 20 is composed of a combination of the separated top holder 20a and the support block 20b, the guide hole 23 coupled to the pilot pin 14 of the die 10 is a top holder It is formed at the edge of the lower surface of 20a.

The plunger 30 is movably coupled in each operation hole 11 of the die 10. These plungers 30 have heads 32 and 33 at both ends of the rod 31, respectively. The upper head 32 and the lower head 33 are positioned above and below the support jaw 12 in the operation hole 11, respectively, and interpose a spring 34 between the upper head 32 and the support jaw 12. To elastically upward.

The upper head 32 is placed on the upper surface of the die 10 to contact the lower end of the pressing protrusion 2 of the keypad K entered into the operation hole 11, and the lower head 33 of the support jaw 12 Touch the bottom surface.

The upper head 32 and the lower head 33 of the plunger 30 is preferably configured to appropriately adjust the distance between the two. This is for adjusting so that the lower end of the key 3 entering the operation hole 11 when the keypad K is placed on the die 10 can be exactly in contact with the upper surface of the upper head 32.

That is, when the push pin 21 presses the key 3, the click sensitivity is checked as to whether or not the moving distance of the pusher protrusion 2 falling down coincides with the set reference data. Since the upper surface must be exactly present in a specific position in consideration of the protruding length of the pressing protrusion 2, it is preferable that the distance between the two heads 32 and 33 of the plunger 30 can be adjusted.

For example, if the distance between the two heads 32 and 33 of the plunger 30 is larger than the set value, the pusher 2 will be pushed up while the keypad K is placed on the die 10 and vice versa. If the interval is smaller than the set value, there is a problem that the upper head 32 is separated from the pressing projection 2, and either is determined to be defective.

Therefore, except for the failure of the pusher 2 itself, the upper surface of the upper head 32 of the plunger 30 should be exactly in contact with the lower end of the pusher 2 while the keypad K is placed on the die 10. do.

To this end, the plunger 30 is, for example, as shown in the lower head 33 is configured to be separated from the load 31 and assembled in a screwed manner to close the gap between the upper and lower head 32, 33 Configured to adjust.

The plurality of detection sensors 40 are, for example, made of a distance sensor, and are arranged on one substrate 41 to correspond to the respective operation holes 11 of the die 10 so as to be spaced apart from the bottom of the die 10 by a predetermined distance. Is located.

By the way, the die 10 should be set on a pedestal such as a table (T) for inspection, for example, the substrate 41 on which the detection sensor 40 is mounted is placed on the table T of the die 10. Form one through slot that may include each operating hole 11 or a plurality of through slots A corresponding to each operating hole 11 to be attached to the bottom surface of the table T. Can be.

Here, although not separately shown, the lower head of the plunger is configured to lift only in the working hole of the die, and a leg is provided on the die or a groove is formed on the lower surface of the die to mount the substrate on which the detection sensor is mounted. Of course, it can be attached directly to the lower surface.

The control section 50 has a manufacturing tolerance allowed for the keypad K in the operation interval S ₁ + S ₂ of the keypad K pusher 2 to be inspected as predetermined approval data for the keypad K to be inspected. Various information related to the keypad K, that is, the shape and arrangement of each key 3, the thickness, the thickness of the base sheet 1, and the like are stored, as well as the reference data in consideration of this.

The controller 50 compares the detection data input from each detection sensor 40 with the stored reference data to determine the quantity / part of each key 3.

The positive / negative display means 60 may be implemented in various forms. For example, as illustrated, the positive / negative display means 60 emits light in a different color according to a determination signal of the controller 50. Can be configured. In this case, the display lamp 61 does not display the quantity / part of each key 3 of the examined keypad K, but displays only the quantity / part of the keypad K itself.

That is, even if only one of the plurality of keys (3) is determined as bad in the control unit 50 is displayed as bad.

In addition, the alarm interlocked with the display lamp 61 to simultaneously generate an alarm sound in the case of each pass or failure, or in the case of a failure, so that the inspector can more clearly recognize whether or not the keypad (K). It may also be provided with a buzzer (62).

On the other hand, even with such a configuration, it is possible to check whether the keypad K meets the set click sensitivity, but in this case, even if any one of the keys 3 is defective, the keypad K itself must be disposed of by failure. Not desirable

Therefore, the present invention is provided with a monitor 80 that can display the shape of the keypad (K) under test and the arrangement of the key (3) connected to the control unit 50, the amount of the keypad (K) itself It is configured to visually display the amount / part of each of the plurality of keys 3 constituting the keypad K as well as the part / part.

That is, the monitor 80 displays the form of the keypad K based on the information on the keypad K to be inspected stored in the controller 50, and displays the detected data and the stored reference data input from each detection sensor 40. Correspondingly, the inspector can visually identify the quantity / part of the corresponding keys 3 of the keypad K embodied in the monitor 80 in response to the result of the determination / quantity of each key 3 determined through the It is shown separately for the key (3).

Next, a method of checking whether the manufactured keypad conforms to the set click sensitivity by using the cellular phone keypad click sensitivity inspection apparatus configured as described above will be described in parallel with FIGS. 6A to 6C.

First, as shown in FIG. 6A, the lifting block 20 is raised to be sufficiently spaced apart from the die 10, and the keypad K to be inspected is placed on the upper surface of the die 10. At this time, the pilot pins 14 of the die 10 are fitted into the plurality of fixing holes 1c provided at the edges of the keypad K, thereby easily setting the keypad K at the correct inspection position on the die 10. You can.

Thus, the pressing protrusions 2 on the lower surface of the keypad K set on the die 10 are fitted in the corresponding operating holes 11 of the die 10, respectively, so that the plungers 30 provided in the operating holes 11 are formed. The upper head 32 is in contact with the upper surface.

After the mounting of the keypad K on the die 10 is completed, the cylinder is driven through an operation switch (not shown). Then, as shown in FIG. 6B, the cylinder operates to lower the lifting block 20 mounted on the cylinder rod 70. At this time, the descending lifting block 20 is coupled to the pilot pin 14 of the corresponding die 10 by the connecting holes 25 provided on the bottom of the top holder 20a to the predetermined click position of the keypad K. Is guided correctly.

Accordingly, the plurality of push pins 21 protruding from the bottom of the key receiving groove 22 while each key 3 of the keypad K enters the key receiving groove 22 formed on the bottom of the top holder 20a. The lower end comes in contact with the upper surface of each of the corresponding keys 3 of the keypad K.

Next, as the lowering of the elevating block 20 continues, as shown in FIG. 6C, each of the keys 3 is pushed downward by the push pins 21 respectively contacting the upper surface thereof, and thus the base sheet convex upward. The embossed portion 1a of (1) is pressed down while being inverted into elastic deformation.

The pressing operation of the key 3 by the push pin 21 is in contact with the edge of the base sheet 1 of the keypad K on which the bottom of the top holder 20a of the lifting block 20 is placed on the die 10. Until it stops, that is, until the piston rod 70 reaches the bottom dead center of the set stroke. Therefore, each key (3) is pressed exactly as long as the protrusion length (L) of the push pin 21 protruding from the bottom of the top holder (20a), which is the key receiving groove 22 of the top holder (20a) It is due to having the same depth as the thickness of 2).

Then, the pressing protrusions 2 formed on the lower surface of each embossing portion 1a simultaneously press downward on the plurality of plungers 30 provided in the operation holes 11 of the die 10 as the pressing pins 21 descend. Is given.

Accordingly, each plunger 30 moves downward while compressing the spring 34, and the detection sensors 40 provided to be spaced apart from the lower portion of each operation hole 11 detect the movement amount of the plunger 30. It sends out to the control part 50.

When the detection data for the falling distance of the plungers 30 is input from the respective detection sensors 40, the controller 50 sets a predetermined operating interval S ₁ + S ₂ of each key 3 stored in advance. = L) is compared with the inputted detection data to determine whether the click sensitivity for each key 3 is positive or negative, and then the determination result is displayed with the positive / negative display means 60 and the monitor ( 80).

That is, when the detection data is out of the allowed ± error range of the reference data (detected data is larger or smaller than the ± error range of the reference data) as a result of the comparison between the detection data and the reference data, it is judged as a defective and ± error of the reference data. If it exists within the range, it is determined as passing and the signal is sent to the positive / negative display means 60 and the monitor 80.

Then, as shown in Fig. 7, the monitor 80 displays the accepted key 3a and the rejected key 3b in different colors, for example, green when it passes and red when it fails. It is easy to know which key 3 of the keys 3 is bad.

At the same time, the positive / negative display means 60 displays only the positive / negative part of the keypad K itself, and if the any of the plurality of keys 3 is determined to be defective, the positive / negative display means 60 ) Will display the keypad K as bad.

On the other hand, when it is determined that the key 3 is defective, the cause is caused by various factors such as a thickness defect of the key 3, a poor adhesive amount, a bad pressing protrusion 2 of the base sheet 1, and an unformed molding. The inspection apparatus of the present invention can determine and display the quantity / part of the keypad K itself as well as the quantity / part of each key 3, so that the corresponding key 3 of the keypad K determined as defective is determined. In the subsequent process, it is possible to grasp the cause of the defect relatively easily through precise inspection, and if the degree of defect can be corrected, only the key 3 can be repaired as a sign and applied to the product without discarding the keypad K.

In addition, in the case of the multi-key 3c, for example, having a plurality of push protrusions 2 in the north, south, east, and west, and when some of the push protrusions 2 are determined to be defective, the multi-key 3c in addition to the above-mentioned reasons. It may be the bending failure itself, it is also possible to check the bending failure of this multi-key (3c).

As described above, according to the click sensitivity inspection apparatus of the cellular phone keypad according to the present invention, it is possible to automatically and accurately check whether the tension and the click sensitivity when pressing each key of the keypad to meet the set value, Since the amount / part of each key can be determined and displayed individually while simultaneously checking the click sensitivity of the keys, it is possible to prevent the unreasonable result of discarding the keypad itself due to the failure of some keys.

In addition, through the keys that are determined to be defective, various defects of the manufactured keypads can be easily detected, such as a pressing protrusion and a non-molding of a base sheet, a poor thickness of a key, a poor adhesive amount, and a poor bending of a multi key. In particular, it is possible to greatly reduce the occurrence of the failure of the keypad by simply modifying only the defective key.

Therefore, the present invention can greatly contribute to the improvement of the quality and reliability of the mobile phone keypad, the productivity and the cost reduction, etc., and also has a very excellent effect to greatly affect the quality and reliability of the mobile phone employing the same.

Claims (8)

An apparatus for inspecting a click sensitivity of a mobile phone keypad, which is formed by bonding a plurality of plate-shaped keys to each push protrusion on a base sheet having a plurality of push protrusions pressing a dome switch of a printed circuit board in a predetermined pattern. A die having the keypad seated and fixed, the die having a plurality of operation holes to correspond to each push projection on the bottom of the keypad; A lifting block having a plurality of push pins protruding downward to correspond to each push projection of the keypad, and lifting and lowering a predetermined stroke at the top of the keypad to simultaneously press each key; An actuator for elevating the elevating block with a predetermined stroke; A plurality of plungers accommodated in respective operation holes of the die and elastically biased upwardly, and having an upper end thereof contacting a lower end of the pusher of the keypad; A plurality of detection sensors disposed at equal intervals directly below each of the operation holes of the die and respectively detecting a falling distance of the corresponding plungers according to the descending of the lifting block; When the keypad is clicked, information on the keypad to be inspected is input, including predetermined reference data on the lowering of the push protrusions, and the amount / part of each key is determined by comparing the detected data input from the respective detection sensors with the reference data. Control unit; And a display unit for displaying a quantity of a portion of the keypad according to a determination result of the controller. The apparatus of claim 1, wherein the quantity display unit comprises a display lamp that is lit in different colors according to a determination result of the control unit. The apparatus of claim 2, wherein an alarm buzzer operating in response to the result is provided in the quantity display unit. The monitor according to any one of claims 1 to 3, further comprising: a monitor connected to the control unit to display the configuration of the keypad being inspected, and individually indicating the quantity / part of each key of the keypad according to the determination result of the control unit. Click sensitivity inspection device of a mobile phone keypad, characterized in that it further comprises. The key receiving groove of claim 1, wherein a key receiving groove is formed on a bottom surface of the lifting block at a depth corresponding to the thickness of the key so that each key of the keypad is simultaneously accommodated. Click sensitivity inspection device of the keypad of the mobile phone, characterized in that protruding. According to claim 5, Clicking the mobile phone keypad characterized in that the protruding length of the push pin with respect to the bottom of the key receiving groove of the lifting block is set equal to the reference data for the falling of the push projection input to the control unit. Sensitivity tester. According to claim 5 or 6, wherein the lifting block, A key receiving groove for accommodating each key of the keypad at the bottom is formed to a depth corresponding to the thickness of the key, and has a plurality of support holes at the bottom of the key receiving groove to correspond to the respective presses of the base sheet. A top holder; A support block connected to an upper side of the top holder so as to be adjustable in distance and mounted to the actuator; The click sensitivity inspection device of the mobile phone keypad is fixed to the support block, the lower end portion protrudes from the bottom of the top holder through each of the support holes of the top holder to press the keys of the keypad, respectively . The plurality of guide holes of claim 1, wherein a plurality of pilot pins are formed to protrude from upper surfaces of the die, respectively, and are fitted into fixing holes provided at edges of the keypad. Click sensitivity inspection device of the keypad of the mobile phone characterized in that it is formed.

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